JP2000310890A - Offset printing original reproduction apparatus, offset printing original reproduction method, and offset printing master original preparation method - Google Patents

Abstract

(57) [Summary] The present invention relates to a reproducing apparatus, a reproducing method, and a method for producing an offset printing master used for forming an image by electrophotography and using the master as a master in multi-print small-lot printing. I will provide a. An offset printing original plate reproducing apparatus 1 sends a master original plate 2 subjected to offset printing, on which an image is formed with an image forming substance, from a set unit U1 one by one to a removal accelerating liquid applying unit U2, After applying the image removal accelerating liquid 204 to the image forming surface of the master master plate 2 by the removal accelerating liquid applying unit U2, the liquid is sandwiched between the peeling belt 307 and the heater roller 305 of the removing unit U3.
The sheet is transported around the heater roller 305 to efficiently peel off the image forming substance from the master master 2, and the peeling belt 3
07, the master master 2 is reproduced as an offset printing master, and the wiping unit U5 removes oily ink components remaining on the master master 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for reproducing a reusable offset printing original, a method for reproducing an offset printing original, and a method for producing a master for offset printing. In the field of light printing, in which an image is formed by direct plate making using the electrophotographic method to create a master master and offset printing is performed using this master master, reusable offset used in multi-print small-volume printing is particularly useful. The present invention relates to a printing original reproduction apparatus, an offset printing original reproduction method, and an offset printing master original preparation method.

[0002]

2. Description of the Related Art In light printing suitable for multi-plate small-volume printing, a master master is prepared by an electrophotographic method to which direct plate making technology is applied, and offset printing is performed using the master master. . Offset printing using this master master can create a master master relatively easily and quickly, and perform high-quality printing.
Not only for business use such as advertisements, catalogs, brochures, etc.
Also widely used in in-house document printing.

A method of creating a master master applying this electrophotographic method was developed in the 1950s (see "Road to IPS-
Ricoh Technical History, 60, February 6, 1996, Chapter 3), the most commonly used method of preparing a master master is to use zinc oxide powder as a photoconductor and bond the powder with an insulating material. This is a method in which a coating solution dispersed in a resin is applied as a photosensitive layer on a conductive support, and a dried photosensitive material is used.

In the method of preparing a master master, a photosensitive material is usually subjected to charging, exposure and development sequentially to form a toner image on a photosensitive layer, and the plate material having the toner image is insensitive to oil. It is treated with a chemical solution to make a master master. Also, zinc oxide, which is widely used as a photoconductor, is usually sensitized mainly with a xanthene-based dye, and a master master using such sensitized zinc oxide as a photoconductor is called a master paper. (Japanese Patent Application Laid-Open Nos. 58-24777 and 58-806).
No. 59).

Further, in order to improve the clarity of printed images, plate inspection and printing durability, conventionally, a conductive support has been
An electrophotographic photosensitive material containing titanium dioxide sensitized in the visible or near infrared region and containing zinc oxide in an amount of 20 to 40% by volume based on the total amount of the titanium dioxide and the zinc oxide is charged. There has been proposed a method of producing an offset printing master that performs exposure, development, and desensitization processing using a halftone image (see Japanese Patent Publication No. 2622753).

[0006]

However, as described above, although simplification of light printing has been realized by the prior art, an offset printing master made of an electrophotographic photosensitive material itself is used as an offset master master. In addition, there is a problem that the master for offset printing, that is, the original for offset printing cannot be reused because etching is required for desensitization. Then, there is a demand for a technique for reproducing a master master for offset printing and a master for offset printing that can efficiently and inexpensively print efficiently without lowering the image.

[0007] Therefore, the invention according to claim 1 is based on metal,
A hydrophilic layer that is swellable with water on the surface of a sheet-like substrate such as paper or polymer but does not disappear and disappears. Using a fixed offset printing master, an image is formed on the surface with a film-like image forming substance by an electrophotographic image forming apparatus, and the offset printing master is used as a master.
After providing a predetermined number of prints with oil-based ink, a predetermined release removal accelerating liquid is applied to the offset printing master original, and the image forming surface of the offset printing master original coated with the release removal accelerating liquid is applied to a predetermined release member. By applying pressure while heating to a predetermined temperature in a state of being in close contact, transferring and removing the image forming substance from the master master for offset printing to the peeling member, and removing the image forming substance transferred to the peeling member from the peeling member. A master plate for offset printing obtained by applying a liquid containing several percent of a lipophilic substance solubilizer to a master plate for offset printing from which a release member has been removed and which has been removed, and applying the liquid agent with a predetermined wiping member. By simply removing the image-forming substance from the master master for offset printing and regenerating it as the master for offset printing. In addition, the present invention provides a reproduction apparatus of an offset printing original plate having printing durability of a small amount printing of about 300 sheets or less and capable of easily providing a master plate for offset printing for oil-based ink. It is an object.

According to a second aspect of the present invention, there is provided an offset printing original plate having a surface layer having hydrophilicity formed on the surface of a predetermined sheet-like substrate, and an electrophotographic image forming method is performed on the surface of the surface layer. An image is formed with a lipophilic image forming substance containing a solid-state image forming substance removing component at room temperature, and is used as a master master for offset printing. The image forming surface of the master plate is heated to a predetermined temperature while being pressed while being in close contact with the predetermined release member, and the image forming substance is transferred and removed from the master plate for offset printing to the release member, and transferred to the release member. The removed image forming substance is removed from the release member and reused again, and the master for offset printing from which the release member has been removed contains several percent of a lipophilic substance solubilizer. By applying the liquid material and wiping off the master master for offset printing on which the liquid material has been applied with a predetermined wiping member, the image forming substance is removed from the master master for offset printing in a dry manner without applying a liquid when removing the image forming substance. It is more easily and easily removed and reproduced at low cost as an original for offset printing.
Further, it is an object of the present invention to provide an inexpensive and easy-to-maintain offset printing master reproduction apparatus that can easily provide an offset printing master for oil-based ink.

According to a third aspect of the present invention, a film having a predetermined release property and a predetermined compatibility with an image forming substance is formed as a surface layer on the surface of a sheet-like base material such as metal, paper, and polymer. Using a fixed offset printing master, an image was formed on the surface thereof with a film-like image forming substance using an electrophotographic image forming apparatus, and the resulting sheet was subjected to a predetermined number of printings with aqueous ink as an offset printing master master. Then, while the image forming surface of the master plate for offset printing is in close contact with the roll-shaped peeling member sent from the feed side to the winding side, pressure is applied while heating to a predetermined temperature to form an image from the master plate for offset printing. The substance is transferred to and removed from the release member, and a solution containing a lipophilic substance solubilizing agent of several percent is applied to the offset printing master master from which the release member has been removed, and a predetermined wiping member is applied. By wiping off the master plate for offset printing to which the liquid agent has been applied, the image forming substance is more easily and easily removed from the master plate for offset printing without using the liquid agent by utilizing the releasability of the surface layer. In addition to being inexpensively reproduced as an original plate for offset printing, it has the printing durability of small-volume printing of about 300 sheets or less, and can easily provide a master master for offset printing intended for aqueous ink at low cost. An object of the present invention is to provide an apparatus for reproducing an original plate for offset printing having good maintainability.

The invention according to claim 4 provides a hydrophilic resin which is swollen by water but does not flow out and disappears on the surface of a sheet-like base material such as metal, paper or polymer, and which is solid at room temperature in the air. A master for offset printing using an original plate for offset printing in which an easily removable film as a main component is fixed as a surface layer and forming an image on the surface with an image forming substance in the form of a film using an electrophotographic image forming apparatus. As an original, after applying a predetermined number of prints with oil-based ink, a predetermined release removal accelerating solution is applied to the offset printing master original, and the image forming surface of the offset printing master original applied with the release removal accelerating liquid is applied to a predetermined amount. The image transferred to the release member by transferring and removing the image forming substance from the master master for offset printing to the release member by applying pressure while heating to a predetermined temperature in a state of being in close contact with the release member. The material is removed from the release member and reused again, and a solution containing a lipophilic substance solubilizing agent of several percent is applied to the master master for offset printing from which the release member has been removed, and the predetermined wiping member is used. By wiping off the master plate for offset printing to which the liquid agent has been applied, the image forming substance can be easily and easily removed from the master plate for offset printing, and the master plate for offset printing can be regenerated as a master plate for offset printing. It is an object of the present invention to provide a method for reproducing an offset printing original plate, which has a property and can easily provide an offset printing master original for oil-based ink.

According to a fifth aspect of the present invention, there is provided an offset printing original plate in which a hydrophilic surface layer is formed on the surface of a predetermined sheet-like substrate, and electrophotographic image formation is performed on the surface of the surface layer. An image is formed with a lipophilic image forming substance containing a solid-state image forming substance removing component at room temperature, and is used as a master master for offset printing. The image forming surface of the master plate is heated to a predetermined temperature while being pressed while being in close contact with the predetermined release member, and the image forming substance is transferred and removed from the master plate for offset printing to the release member, and transferred to the release member. The removed image forming substance is removed from the release member and reused again, and the master for offset printing from which the release member has been removed contains several percent of a lipophilic substance solubilizer. By applying the liquid material and wiping off the master master for offset printing on which the liquid material has been applied with a predetermined wiping member, the image forming substance is removed from the master master for offset printing in a dry manner without applying a liquid when removing the image forming substance. It is more easily and easily removed and reproduced at low cost as an original for offset printing.
Another object of the present invention is to provide an inexpensive and easy-to-maintain offset printing master reproduction method which can easily provide an offset printing master for oil-based ink.

[0012] The invention according to claim 6 is that a film having a predetermined release property and a predetermined compatibility with an image forming substance is formed as a surface layer on the surface of a sheet-like base material such as metal, paper, and polymer. Using a fixed offset printing master, an image was formed on the surface thereof with a film-like image forming substance using an electrophotographic image forming apparatus, and the resulting sheet was subjected to a predetermined number of printings with aqueous ink as an offset printing master master. Then, while the image forming surface of the master plate for offset printing is in close contact with the roll-shaped peeling member sent from the feed side to the winding side, pressure is applied while heating to a predetermined temperature to form an image from the master plate for offset printing. The substance is transferred to and removed from the release member, and a solution containing a lipophilic substance solubilizing agent of several percent is applied to the offset printing master master from which the release member has been removed, and a predetermined wiping member is applied. By wiping off the master plate for offset printing to which the liquid agent has been applied, the image forming substance is more easily and easily removed from the master plate for offset printing without using the liquid agent by utilizing the releasability of the surface layer. In addition to being inexpensively reproduced as an original plate for offset printing, it has the printing durability of small-volume printing of about 300 sheets or less, and can easily provide a master master for offset printing intended for aqueous ink at low cost. An object of the present invention is to provide a method of reproducing an original plate for offset printing having good maintainability.

[0013] The invention according to claim 7 is to provide a hydrophilic resin which is swollen by water but does not flow out and disappears on the surface of a sheet-like base material such as metal, paper and polymer, and which is solid at room temperature in the air. For offset printing in which a hydrophilic surface layer is formed on the surface of an offset printing original plate on which a film for easily removing deposits as a main component is fixed as a surface layer, or on the surface of a predetermined sheet-like substrate. When preparing a master for offset printing in which an image is formed by a film-like image forming substance on the surface of the master with an electrophotographic image forming apparatus, a predetermined liquid is applied to the surface of the master for offset printing. By improving the stability of the hydrophilic portion on the master master for offset printing, it is possible to prevent contaminants from remaining on the oil-based ink, etc. And its object is to provide an offset printing master plate precursor capable of improving the resistance.

[0014]

According to the first aspect of the present invention, there is provided an apparatus for regenerating an original plate for offset printing, which swells with water on the surface of a sheet-like base material such as metal, paper, or polymer, but flows out and disappears. Non-adhesive, easily removable coatings mainly composed of a resin that is hydrophilic and solid at room temperature in air are immobilized as a surface layer, and the surface is imaged with a film-like image forming material using an electrophotographic image forming apparatus. What is claimed is: 1. An apparatus for reproducing an offset printing master, which is formed and used for printing a predetermined number of sheets with an oil-based ink as an offset printing master, wherein a predetermined peeling removal promoting liquid is applied to the offset printing master. Means, and pressurizing while heating to a predetermined temperature in a state where the image forming surface of the master master for offset printing coated with the separation removal accelerating liquid is brought into close contact with a predetermined release member. Removing means for transferring / removing the image forming substance from the master printing sheet to the peeling member; removing the image forming substance transferred to the peeling member from the peeling member and reusing by the removing means again And applying a liquid containing several percent of a lipophilic substance solubilizer to the master master for offset printing from which the release member has been removed by the removing means, and applying the liquid with a predetermined wiping member. Wiping means for wiping the offset master master for offset printing,
The above object is achieved by reproducing the offset printing master plate into the offset printing master plate.

According to the above construction, a hydrophilic resin which swells with water but does not flow out and disappears on the surface of a sheet-like base material such as metal, paper, or polymer and which is solid at room temperature in the air is used as a main component. Using a master plate for offset printing, using an offset printing master with a film that easily removes deposits fixed as a surface layer, and forming an image on the surface with a film-like image forming substance using an electrophotographic image forming apparatus After applying a predetermined number of prints with an oil-based ink, a predetermined peeling removal accelerating liquid is applied to the offset printing master master, and the image forming surface of the offset printing master master coated with the peeling removal promoting liquid is coated with a predetermined peeling member. The image forming material is transferred from the master master for offset printing to the release member by applying pressure while heating to a predetermined temperature in a state in which the image formation material is transferred to the release member. The material is removed from the peeling member and reused again, and a liquid material containing a lipophilic substance solubilizing agent of several percent is applied to the master master for offset printing from which the peeling member has been removed, and the liquid material is removed by a predetermined wiping member. Wipes off the master master for offset printing coated with, so that it is possible to easily and easily remove the image forming substance from the master for offset printing and reproduce it as the master for offset printing, and print a small amount of about 300 sheets or less. It is possible to provide an offset printing original plate reproducing apparatus that has durability and can easily provide an offset printing master original for oil-based ink.

According to a second aspect of the present invention, there is provided an apparatus for reproducing an original plate for offset printing, wherein a hydrophilic surface layer is formed on the surface of a predetermined sheet-like substrate, and an electrophotographic image is formed on the surface of the surface layer. In a forming apparatus, an image is formed by a lipophilic image forming substance containing a solid-state image forming substance removing component at room temperature, and is used as a master master for offset printing for a predetermined number of prints with oil-based ink for offset printing. An original plate reproducing apparatus, wherein the image forming surface of the offset printing master original plate is heated to a predetermined temperature while being pressed while being in close contact with a predetermined release member, and the image forming material is removed from the offset printing master original plate. Removing means for transferring / removing the image forming material to / from the peeling member, and removing the image forming substance transferred to the peeling member from the peeling member and again using the removing means And a cleaning means to be subjected to use,
A liquid containing a few percent of a lipophilic substance solubilizing agent is applied to the offset printing master master from which the peeling member has been removed by the removing means, and a predetermined wiping member applies the liquid to the offset printing master. The wiping means for wiping the master master is provided, and the above object is achieved by reproducing the master master for offset printing into the master for offset printing.

According to the above arrangement, an offset printing original plate having a hydrophilic surface layer formed on the surface of a predetermined sheet-like substrate is used, and the surface of the surface layer is formed by an electrophotographic image forming apparatus. An image is formed with a lipophilic image forming material containing a solid-state image forming material removing component at room temperature, and is used as a master plate for offset printing. The image forming surface is heated to a predetermined temperature while being pressed while being in close contact with a predetermined release member, and the image forming substance is transferred and removed from the master master for offset printing to the release member, and the image transferred to the release member is removed. The forming material was removed from the peeling member and reused again, and the master plate for offset printing from which the peeling member had been removed contained several percent of a lipophilic substance solubilizer. Since the master for offset printing, to which the liquid agent has been applied, is wiped off by applying a liquid agent with a predetermined wiping member, the image forming substance is further dried from the master for offset printing without applying a liquid when removing the image forming substance. It can be easily and easily removed and regenerated inexpensively as an offset printing master plate. It has printing durability for small-volume printing of about 300 sheets or less, and is easily used for offset printing for oil-based inks. An apparatus for reproducing an offset printing original plate that can provide a master original plate can be provided.

According to a third aspect of the present invention, there is provided an apparatus for reproducing an original plate for offset printing, wherein a predetermined release property and a predetermined phase for an image forming substance are formed on the surface of a sheet-like base material such as metal, paper, or polymer. A soluble film is immobilized as a surface layer, and an image is formed on the surface of the film by an electrophotographic image forming apparatus using a film-like image forming substance. An apparatus for reproducing an original plate for offset printing, which is heated to a predetermined temperature while keeping the image forming surface of the master plate for offset printing in close contact with a roll-shaped peeling member fed from a feed side to a winding side. Removing means for transferring and removing the image forming substance from the master master for offset printing to the peeling member from the master plate for offset printing; and removing the peeling member by the removing means. Wiping means for applying a liquid containing several percent of a lipophilic substance solubilizer to a master master for set printing, and wiping the offset printing master master coated with the liquid with a predetermined wiping member, The above object is achieved by reproducing the offset printing master plate into the offset printing plate plate.

According to the above construction, a film having a predetermined releasability and a predetermined compatibility with an image forming substance is immobilized as a surface layer on the surface of a sheet-like base material such as metal, paper, and polymer. Using the offset printing master was subjected to a predetermined number of prints with water-based ink, as an image is formed on the surface by an electrophotographic image forming apparatus with a film-like image forming substance and a master master for offset printing, While the image forming surface of the master plate for offset printing is brought into close contact with the roll-shaped peeling member sent from the feed side to the winding side, the image forming substance is pressed from the master master for offset printing by applying pressure while heating to a predetermined temperature. Transfer to and remove from the release member, apply a liquid containing several percent of a lipophilic substance solubilizer to the master master for offset printing from which the release member has been removed, and apply it with a predetermined wiping member. Since the master for offset printing to which the liquid has been applied is wiped off, the image forming substance is more easily and easily removed from the master for offset printing by using the releasability of the surface layer without using a liquid. Inexpensive master plate for offset printing, which can be reproduced at low cost as a printing master, has printing durability for small amount printing of about 300 sheets or less, and can be easily provided for aqueous ink. Thus, it is possible to provide an apparatus for reproducing an original plate for offset printing which has good maintainability.

According to a fourth aspect of the present invention, there is provided a method for regenerating an original plate for offset printing, comprising a hydrophilic and air air which swells with water but does not flow out and disappear on the surface of a sheet-like substrate such as metal, paper or polymer. A film that easily removes deposits containing a solid resin as a main component at medium and normal temperature is fixed as a surface layer, and an image is formed on the surface with an image-forming substance in the form of a film using an electrophotographic image forming apparatus. A method for regenerating an offset printing master used for printing a predetermined number of sheets with oil-based ink as a master master, comprising: a liquid coating treatment step of applying a predetermined peeling removal accelerating liquid to the offset printing master master; The image forming surface of the offset printing master master to which the removal promoting liquid has been applied is pressurized while being heated to a predetermined temperature in a state of being in close contact with a predetermined peeling member. A removing step of transferring and removing the image forming substance from the star master to the peeling member, and removing the image forming substance transferred to the peeling member from the peeling member and reusing it in the removing step again A cleaning treatment step to be performed, and applying a liquid material containing a lipophilic substance solubilizing agent of several percent to the master master for offset printing from which the release member has been removed in the removal processing step, and applying the liquid material with a predetermined wiping member. The above object is achieved by performing a wiping process of wiping the applied master plate for offset printing to regenerate the master plate for offset printing into the master plate for offset printing.

According to the above-mentioned structure, a hydrophilic resin which swells with water but does not flow out and disappears on the surface of a sheet-like base material such as metal, paper, and polymer and which is solid at room temperature in the air is used as a main component. Using a master plate for offset printing, using an offset printing master with a film that easily removes deposits fixed as a surface layer, and forming an image on the surface with a film-like image forming substance using an electrophotographic image forming apparatus After applying a predetermined number of prints with an oil-based ink, a predetermined peeling removal accelerating liquid is applied to the offset printing master master, and the image forming surface of the offset printing master master coated with the peeling removal promoting liquid is coated with a predetermined peeling member. The image forming material is transferred from the master master for offset printing to the release member by applying pressure while heating to a predetermined temperature in a state in which the image formation material is transferred to the release member. The material is removed from the peeling member and reused again, and a liquid material containing a lipophilic substance solubilizing agent of several percent is applied to the master master for offset printing from which the peeling member has been removed, and the liquid material is removed by a predetermined wiping member. Wipes off the master master for offset printing coated with, so that it is possible to easily and easily remove the image forming substance from the master for offset printing and reproduce it as the master for offset printing, and print a small amount of about 300 sheets or less. It is possible to provide a method for regenerating an offset printing original plate which has durability and can easily provide an offset printing master original plate for oil-based ink.

According to a fifth aspect of the present invention, there is provided a method of reproducing an original plate for offset printing, wherein a surface layer having hydrophilicity is formed on the surface of a predetermined sheet-like substrate, and an electrophotographic image is formed on the surface of the surface layer. In a forming apparatus, an image is formed by a lipophilic image forming substance containing a solid-state image forming substance removing component at room temperature, and is used as a master master for offset printing for a predetermined number of prints with oil-based ink for offset printing. A method of regenerating an original plate, wherein the image forming surface of the offset printing master original plate is heated to a predetermined temperature while being pressed while being in close contact with a predetermined release member, and the image forming material is removed from the offset printing master original plate. Removing the image forming substance transferred to the peeling member from the peeling member, and removing the image forming substance transferred to the peeling member again. A cleaning treatment step for reuse in the above step, and applying a liquid containing several percent of a lipophilic substance solubilizer to the master master for offset printing from which the peeling member has been removed in the removal treatment step, and wiping the liquid. A wiping step of wiping the offset printing master plate to which the liquid agent has been applied with a member, thereby regenerating the offset printing master plate into the offset printing plate plate, thereby achieving the above object. .

According to the above configuration, an offset printing original plate having a hydrophilic surface layer formed on the surface of a predetermined sheet-like base material is used, and an electrophotographic image forming apparatus is formed on the surface of the surface layer. An image is formed with a lipophilic image forming material containing a solid-state image forming material removing component at room temperature, and is used as a master plate for offset printing. The image forming surface is heated to a predetermined temperature while being pressed while being in close contact with a predetermined release member, and the image forming substance is transferred and removed from the master master for offset printing to the release member, and the image transferred to the release member is removed. The forming material was removed from the peeling member and reused again, and the master plate for offset printing from which the peeling member had been removed contained several percent of a lipophilic substance solubilizer. Since the master for offset printing, to which the liquid agent has been applied, is wiped off by applying a liquid agent with a predetermined wiping member, the image forming substance is further dried from the master for offset printing without applying a liquid when removing the image forming substance. It can be easily and easily removed and regenerated inexpensively as an offset printing master plate. It has printing durability for small-volume printing of about 300 sheets or less, and is easily used for offset printing for oil-based inks. An inexpensive and easy-to-maintain offset printing master reproduction method capable of providing a master master can be provided.

According to a sixth aspect of the present invention, there is provided a method for regenerating an original plate for offset printing, comprising the steps of: providing a surface of a sheet-like base material such as metal, paper, or polymer with a predetermined release property and a predetermined phase for an image forming substance; A soluble film is immobilized as a surface layer, and an image is formed on the surface of the film by an electrophotographic image forming apparatus using a film-like image forming substance. A method for regenerating a master for offset printing, wherein the image forming surface of the master for offset printing is brought into close contact with a roll-shaped peeling member fed from a feed side to a take-up side. And removing the image forming substance from the master master for offset printing by transferring and removing the image forming substance to the peeling member. A wiping processing step of applying a liquid containing several percent of a lipophilic substance solubilizer to the removed offset printing master and wiping the offset printing master with the predetermined liquid wiping member; The above object is achieved by reproducing the master master for offset printing into the master for offset printing.

According to the above construction, a film having a predetermined releasability and a predetermined compatibility with the image forming substance is immobilized as a surface layer on the surface of a sheet-like base material such as metal, paper, and polymer. Using the offset printing master was subjected to a predetermined number of prints with water-based ink, as an image is formed on the surface by an electrophotographic image forming apparatus with a film-like image forming substance and a master master for offset printing, While the image forming surface of the master plate for offset printing is brought into close contact with the roll-shaped peeling member sent from the feed side to the winding side, the image forming substance is pressed from the master master for offset printing by applying pressure while heating to a predetermined temperature. Transfer to and remove from the release member, apply a liquid containing several percent of a lipophilic substance solubilizer to the master master for offset printing from which the release member has been removed, and apply it with a predetermined wiping member. Since the master for offset printing to which the liquid has been applied is wiped off, the image forming substance is more easily and easily removed from the master for offset printing by using the releasability of the surface layer without using a liquid. Inexpensive master plate for offset printing, which can be reproduced at low cost as a printing master, has printing durability for small amount printing of about 300 sheets or less, and can be easily provided for aqueous ink. Thus, it is possible to provide a method for reproducing an original plate for offset printing which has good maintainability.

According to a seventh aspect of the present invention, there is provided a method of producing a master master for offset printing, comprising a hydrophilic material which swells with water but does not flow out and disappears on the surface of a sheet-like base material such as metal, paper and polymer. It has hydrophilicity on the surface of an offset printing original plate on which an easily-adhered substance-removing film mainly composed of a solid resin at room temperature in air is fixed as a surface layer, or on the surface of a predetermined sheet-like substrate. A method of producing a master master for offset printing, in which an image is formed on a surface of an offset printing master having a surface layer formed thereon with a film-like image forming substance using an electrophotographic image forming apparatus, wherein the offset printing master is provided. The above object is achieved by applying a predetermined liquid to the surface of the original plate.

According to the above construction, a hydrophilic resin which swells with water but does not flow out and disappears on the surface of a sheet-like base material such as metal, paper or polymer and which is solid at room temperature in the air is used as a main component. On the surface of the offset printing original plate on which the deposit easily removable film is fixed as a surface layer, or on the surface of a predetermined sheet-like substrate, a surface layer having hydrophilicity is formed on an offset printing original plate. When preparing a master plate for offset printing in which an image is formed with a film-like image forming material with an electrophotographic image forming apparatus on the surface, a predetermined liquid is applied to the surface of the master plate for offset printing, so that offsetting is performed. By improving the stability of the hydrophilic part on the master plate for printing, it is possible to prevent the remaining residue of contaminants of the oil-based ink, etc., and it is possible to easily and easily regenerate, It is possible to improve the printing resistance.

[0028]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. It should be noted that the embodiments described below are preferred embodiments of the present invention, and therefore, various technically preferable limitations are added. However, the scope of the present invention is not limited to the following description. The embodiments are not limited to these embodiments unless otherwise specified.

FIG. 1 is a diagram showing a first embodiment of an apparatus for reproducing an offset printing original, a method for reproducing an offset printing original, and a method for producing a master for offset printing according to the present invention.

FIG. 1 shows an apparatus for reproducing an offset printing original according to the first embodiment of the present invention, a method for reproducing an offset printing original, and a method for producing a master for offset printing. FIG. 1 is a schematic configuration diagram of an original printing apparatus 1 for offset printing, and includes a set unit U1, a removal accelerating liquid applying unit U2, a removal unit U3, a cleaning unit U4, a wiping unit U5, a paper discharging unit U6, and the like.

The original printing plate reproducing apparatus 1 for offset printing supplies a master original, which has been formed with an image forming substance and used for offset printing, from the set unit U1 to the removing liquid applying unit U2 one by one. U2
After applying the image removal accelerating liquid at step S5, the master unit is conveyed while being heated and pressurized by the peeling member at the removing unit U3, and the image forming substance on the master plate is transferred and removed to the peeling member. After wiping off the residue of the oil-based ink on the master, it is discharged and placed on the paper discharging unit U6, the image forming substance transferred to the peeling member is removed by the cleaning unit U4, and the peeling member is returned to the reproduction of the master master. Use.

Hereinafter, the units U1 to U6 will be sequentially described. The set unit U1 includes an original case 101,
The original case 101 includes a feed roller 102 and a pair of registration rollers 103. A plurality of master originals 2 to be reproduced are stored in the original case 101.

Although not shown in the original case 101,
A bottom plate on which the master master 2 is placed, and the bottom plate is urged upward by a spring or the like (not shown),
Feed roller 10 of master master 2 in master case 101
Lift the two ends upward.

The feed roller 102 is driven to rotate at a predetermined timing by a drive motor (not shown) or the like, and the master original 2 in the original case 101 is moved to the uppermost master original 2.
Sequentially.

The master master 2 sent out by the feed roller 102 is prevented from being double fed by a separation mechanism (not shown).
Only one master master 2 is sent out to the removal promoting liquid applying unit U2 after the timing is adjusted by the registration roller 103 for timing adjustment and skew correction.

In the present embodiment, the master master 2 is formed on the surface of an offset printing master having a surface layer formed on the surface of a predetermined sheet-like base material by using an electrophotographic image forming apparatus. A mirror image is printed by a mirror function (a function of printing a mirror image of the original image) of the processing software.

As such a master master 2, for example, a film for easily removing deposits disclosed in JP-A-6-222604 is coated on the surface of a sheet-like base material such as metal, paper, or polymer. The sheet coated as above is used as an offset printing original, or the recording material disclosed in Japanese Patent Application Laid-Open No. 7-31523 previously proposed by the present applicant is used as the offset printing original, A mirror image image printed by a mirror function of an image processing software (a function of printing a mirror image of an original image) using an electrophotographic printer (for example, SP-10 Mark II Pro manufactured by Ricoh Co., Ltd.) can be used. .

[0038] The film for easily removing deposits disclosed in JP-A-6-222604 is, for example, a film which swells with water but does not flow out and disappears. The recording material disclosed in Japanese Patent No. 311523 is, for example, a material that swells but is not dissolved by an image removal promoting liquid other than cellulose fibers at least in the vicinity of a surface where a film-like image is formed,
Further, it has a swelling layer which swells more than the film-like image forming substance by the image removal accelerating liquid.

As the master master 2, a base material coated with a swelling layer on the surface is used as an offset printing master, and a mirror image is formed by a mirror function of image processing software using an electrophotographic image forming apparatus. It may be printed.

As the substrate, paper or plastic film can be used. In particular, plastic film is excellent in durability. In this case, as the master master 2, in order to improve the transportability of the master master 2 when forming an image with an electrophotographic image forming apparatus or when reproducing the master master 2 for offset printing. It is necessary to have predetermined surface roughness and surface resistance. The surface roughness is required to be about 5 to 10 μm in order to prevent transport troubles such as double feeding of the master master 2. However, paper has a proper surface roughness (about 9 to 10 μm) as described above. Degree) and is suitable as a base material. However, since the plastic film has too good flatness on its surface, it needs to be given an appropriate surface roughness when used as a substrate. As a method for imparting surface roughness to the surface of the plastic film, for example, the roughness is rolled to the surface of the plastic film using a roller having a constant roughness, or the surface of the plastic film is subjected to a predetermined process by sandblasting or the like. There is a method of roughening, and after forming the above-mentioned coat layer,
A method in which the surface of the coat layer is roughened by sand blasting or the like, or a method in which a fine powder solid is contained as a filler in a coating solution and simultaneously coated, may be adopted.

The swelling layer to be coated has good releasability from the image forming substance formed on the master master 2 in order to improve the reusability of the master master 2 and improve the image quality. And good compatibility with the image forming substance.

As the swelling layer to be coated, first, from the viewpoint of releasability, a resin containing fluorine is suitable as a material (coating material). As the resin containing fluorine, for example, PFA (tetrafluoroethylene / porfluoroalkylvinyl ether copolymer, critical surface tension 17.8 mN / m) used as a surface release agent for the fixing roller of an electrophotographic image forming apparatus, and an intermediate transfer belt of an image forming apparatus ETFE used as
(Ethylene / tetrafluoroethylene copolymer, critical surface tension 22.0 mN / m). These materials are
It has material properties such that toner as an image forming substance does not adhere, or toner adheres but does not adhere, and is suitable as a swelling layer to be coated. Further, silicon-based oil or the like used for releasing the surface of the fixing roller of the image forming apparatus is also a material having good releasability, and is suitable as a swelling layer to be coated. Further, as the swelling layer to be coated, in addition to such a fluorine-containing resin and silicone-based oil, a substance having a surface energy apart from a certain surfactant or an image forming substance, or the like is used. be able to.

However, as described above, the master master 2
In order to improve the image quality, it is also required that the image formed on the master master 2 has good fixability and storage stability.

The fixing property of the image forming substance can be ensured by giving the image forming substance and the surface of the master master plate 2, that is, the coated swelling layer mutual compatibility so as to be able to shift to an adhesive state. it can. Having the compatibility means that the plasticizer is homogeneously mixed with the polymer substance without causing phase separation, and the material of the swelling layer of the master master 2 has such characteristics with respect to the image forming substance. , The fixing property of the image forming substance can be ensured.

However, under the condition that the image forming substance and the swelling layer are actually compatible at the time of image formation and reproduction, the image forming substance on the master master 2 is appropriately adjusted by the offset printing master reproduction apparatus 1. When the master original 2 is reproduced by the offset printing original reproduction apparatus 1, the master original 2 is at least the softening point of the image forming substance and the swelling layer Heating the master master 2 to a temperature lower than the heat deformation temperature of the material
Master master 2 at a pressure less than the thermal deformation pressure of the material of the swollen layer
And a peeling member to be described later.

Examples of the material of the swelling layer having the characteristics of the release property and the compatibility include, for example, PVDF (polyvinylidene fluoride, critical surface tension 25 mn / m) or a copolymer of PVDF and another polymer. Can be mentioned.

Since this PVDF is a family of fluororesins, it is basically an inactive resin, has a generally-releasable releasability, and has an overlay that does not easily adhere to dust and dirt. (For example, Kureha KFC film manufactured by Kureha Chemical Industry: trade name). Therefore, PVDF has poor adhesiveness and has a property of easily peeling or transferring the image forming substance. On the other hand, PVDF is known to have compatibility with acrylic resins and vinyl acetate resins (“Fluorine Resin Handbook”, Nikkan Kogyo Shimbun, 1991.11.
30, issued on page 394). Also, as a plasticizer for PVDF, saturated polyester is known, and it is known that the plasticizing effect is large and the compatibility is good. Kogyosha, issued December 1, 1979, see p. 152).

Further, the swelling layer is formed by applying the above-mentioned coating material on the surface of the substrate, and the amount thereof is 50 g / 50 g from the relationship between the coefficient of linear expansion and the coefficient of thermal expansion with the substrate.
m2 or less is appropriate. That is, when the amount of the swelling layer is within the above range, the swelling layer and the substrate do not undergo layer separation even after repeated reuse of the master master plate 2, and the texture of the substrate is not significantly impaired. As a lower limit of the amount of the coating material of the swelling layer, according to the results of experiments conducted by the present applicant, when the base material is paper, if the coating amount is about 2 g / m 2, it is possible to cover the unevenness of the paper. The lower limit is about 5 g / m <2> because the image forming substance cannot be left unreacted. That is, when the base material is paper, the material of the swelling layer is about 2 g.
/ M2, the residual image density after image removal is OD
The value (measured optical reflection density) was as high as 0.50, and it was observed that the original image of characters and the like could be recognized. However, the amount of the material of the swelling layer was about 5 g / m 2 or more. In, the OD value could be suppressed by at least one digit from 0.02 to 0.04, the original image was not recognized, and good image removal quality could be secured. When the substrate is a plastic film, the amount of the coating material is about 2 g / m2.
Even with the coating amount of 2, the image forming substance was completely transferred without any residue.

As the master master 2, as described above,
In order to improve the transportability, it is necessary to have a predetermined surface roughness and surface resistance. However, when PVDF is used as the coating material of the swelling layer, the conductive material is not electrically conductive. It is preferable to mix an electrolyte in order to reduce the concentration. This electrolyte can be, for example, chlorides such as sodium, potassium, calcium and magnesium, sodium sulfate and sodium aluminate as inorganic salts, and organic conductive agents such as quaternary ammonium salts and polystyrene. Sulfonic acid, sodium formate,
Glycerin and uric acid can be used. In particular, the present applicant has conducted tests and found that the organic conductive agent is tetrafluoroborate / tetra-n-butylammonium (Tetra-n-butylammonium Tetrafluoroborate, molecular weight: 329). .27) was particularly good.

The master master 2 is set in an offset printing machine that performs offset printing using oil-based ink, and is used for printing a small amount of, for example, 300 sheets.

Further, the master original plate 2 may be further obtained by forming a mirror image on the offset printing original plate by an electrophotographic image forming apparatus and then performing a water application process for imparting a predetermined amount of water. Good. As described above, when the master master 2 is subjected to the water application treatment, the surface portion of the base material can be reliably subjected to the hydrophilic treatment.

The master master 2 used for printing in this manner is set in the master case 101, and is conveyed one by one to the removal accelerating liquid applying unit U2 as described above.

Removal promoting liquid applying unit (liquid applying means) U
Reference numeral 2 includes a liquid container 201, a liquid application roller 202, a press roller 203, and the like. The liquid container 201 contains an image removal accelerating liquid 204.

The liquid application roller 202 is driven to rotate, so that an appropriate amount of the image removal promoting liquid 20 in the liquid container 201 is provided.
4 and a small amount is applied to the image forming surface of the master master 2 fed from the set unit U1 to the pressing roller 203, and the master master 2 coated with the image removal promoting liquid 204 is transferred to the removal unit U3. Send out.

In FIG. 1, the lower side of the master master 2 is an image forming surface.
2 shows that the image removal accelerating liquid 204 is applied, but the configuration for applying the image removal accelerating liquid 204 to the master master 2 is not limited to this. The image removal accelerating liquid 204 may be applied in a non-contact manner.

Image removal promoting liquid (peeling removal promoting liquid) 204
Is to reduce the adhesive force of the image forming substance by the image removal accelerating liquid 204 while the master master 2 is transported to the removal unit U3, and often contains water.

As described above, the image removal accelerating liquid 204
When applied to the master master 2 on which an image is formed by the image forming substance, it has a function of reducing the adhesive force between the master master 2 and the image forming substance, that is, has a function of accelerating image removal, and is applied. Various components are used depending on the master master 2 and the image forming substance.
It is a liquid of a predetermined component.

As the image removal accelerating liquid 204, water or a liquid in which a surfactant having high dispersion or dissolution stability in water is added to water can be used. Examples of the surfactant include an anionic surfactant and a cationic surfactant. An ionic surfactant, an amphoteric surfactant, a nonionic surfactant, a silicone-based surfactant, a fluorine-based surfactant, or the like can be used.

Specifically, as the anionic surfactant, soap, N-acyl amino acid salt, alkyl ether acetate and the like can be used.

As the cationic surfactant, aliphatic amine salts, alkyl quaternary ammonium salts, aromatic quaternary ammonium salts, heterocyclic quaternary ammonium salts and the like can be used.

As the amphoteric surfactant, a betaine type such as carboxybetaine and sulfobetaine, an aminocarboxylate, an imidazoline derivative and the like can be used.

As the nonionic surfactant, polyoxyethylene alkyl and aryl ethers, polyoxyethylene styrene ether and the like can be used.

As the silicone surfactant, polyoxyalkylene-modified siloxane, carboxylated polyoxyalkylene-modified siloxane and the like can be used.

Examples of the fluorinated surfactant include anionics such as fluoroalkylcarboxylates, fluoroalkylsulfonates, and fluoroalkylphosphates, amphoteric systems such as fluoroalkyl-introduced betaines, fluoroalkylethylene oxide adducts, and fluoroalkylethylene oxide adducts. Nonionics such as alkyl oligomers and fluoroalkylamine oxides, and cationics such as fluoroalkyltrimethylammonium salts can be used.

Further, a compound (hereinafter, referred to as a plasticizer) for plasticizing the image forming substance can be added to the image removal accelerating liquid 204. When the plasticizer is added, the plasticizer is converted to the image forming substance. In the case where the image forming substance is peeled off from the master master 2 by using heat and pressure and heating contact, the set temperature at the time of peeling can be reduced. The required power consumption can be reduced.

As a plasticizer to be added to the image removal accelerating liquid 204, 2-methoxyethanol, 2-ethoxyethanol, 2- (methoxymethoxy) ethanol, 2-isopropoxyethanol,
There are cellosolves such as butoxyethanol, furfuryl alcohol, tetrahydrofurfuryl alcohol and the like.

Also, some of the existing surfactants can act as a plasticizer.

Specific examples include an ethylene oxide additive of an aliphatic alcohol, a polyoxyethylene alkyl-ether type, a polyoxyethylene polyoxypropylene alkyl ether type, and an alkylamine oxide.

A water-soluble polymer can be added to the image removal accelerating liquid 204 together with a surfactant, and this water-soluble polymer improves the removal characteristics and the reproduction state.

Examples of the water-soluble polymer that can be added to the image removal accelerating liquid 204 include natural gums such as gum arabic, gum tragan, guar gum, karaya gum, and locust bean gum.

The image removal accelerating liquid 204 may contain a wetting agent. Examples of the wetting agent include polyhydric alcohols such as ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, polyethylene glycol, and glycerin.

Other additives to the image removal accelerating liquid 204 include a pH adjuster. The pH adjuster is added for the purpose of improving the storage stability of the image removal promoting liquid 204 by adjusting the pH of the image removal promoting liquid 204 to 5 to 8. That is, when the pH is 5 or less, the wettability is poor and rust is easily generated. When the pH is 8 or more, the ester is hydrolyzed and the physical properties are changed.

As the pH adjuster, the image removal accelerating liquid 20
Any pH-adjusting substance can be used as long as the pH can be adjusted to 5 to 8 without adversely affecting the pH of the substance.

Specifically, amines such as diethanolamine and triethanolamine, and hydroxides of alkali metal elements such as lithium hydroxide, sodium hydroxide and potassium hydroxide can be used.

Further, an antiseptic / antifungal agent can be added to the image removal accelerating liquid 204. Examples of the antiseptic / antifungal agent include sodium dehydroacetate, sodium sorbate, sodium 2-pyridinethiol-1-oxide, and benzoic acid. Sodium acid, sodium pentachlorophenol and the like can be used.

A chelating agent is added to the image removal accelerating liquid 204 as a peeling aid with a sealing agent for heavy metal ions. Examples of the chelating agent include sodium ethylenediaminetetraacetate, sodium nitrilotriacetate, and hydroxyethylethylenediamine. Examples include sodium triacetate, sodium diethylenetriaminepentaacetate, and sodium uramil diacetate.

Further, a rust preventive can be added to the image removal accelerating liquid 204. Examples of the rust preventive include acid sulfite, sodium thiosulfate, ammonium thiodiglycolate, diisopropyl ammonium nitrite, Examples include pentaerythritol nitrate and dicyclohexylammonium nitrite.

A bleaching agent can be added to the image removal accelerating liquid 204 for the purpose of improving the whiteness of the master master 2 after reproduction. Oxidative bleaches include hydrogen peroxide, sodium peroxide, sodium percarbonate, sodium hypochlorite, and the like.

Further, the image removal accelerating liquid 204 may contain a fluorescent dye, a bluing dye, an enzyme and the like.

The removal-promoting-liquid applying unit U2 is provided with the master master 2 used for offset printing from the set unit U1 and having the image forming substance adhered to the surface thereof.
02 and the pressing roller 203,
The image removal promoting liquid 204 in the liquid container 201 adheres to the liquid application roller 202, and the master master 2 is fed by the liquid application roller 202 to the press roller 203.
A small amount on the image forming surface of When the image removal accelerating liquid 204 is applied to the master master 2, the adhesive force between the image forming substance and the master master 2 is reduced.

In particular, as a surface layer of the master master 2, a hydrophilic and easy-to-adhere-adhesion-removing film mainly composed of a solid resin at room temperature in the air, which swells with water but does not flow out, is fixed. In this case, the swelling layer as the surface layer swells due to the application of the image removal accelerating liquid 204, and the adhesive strength between the image forming substance and the surface layer is reduced.

The removal promoting liquid applying unit U2 sends out the master master 2 coated with the image removing promoting liquid 204 to the removing unit U3.

The removing unit (removing means) U3 includes transport rollers 301 to 304, a heater roller 305, a pressure rubber roller 306, a sheet-like peeling belt 307, and the like.
Built-in.

The peeling belt (peeling member) 307 is a member for peeling and transferring the image forming material from the master master 2 by adhering to the image forming material on the master master 2 and having a predetermined width, for example, various sizes. It is formed in an endless ring shape having a width sufficient to peel and transfer the image forming substance on the master master 2 of the master master plate 2, and has excellent adhesiveness and heat resistance to the image forming substance to a certain degree or more, and has little surface deterioration. It is necessary to have good release properties. Peeling belt 3
Reference numeral 07 extends over the transport rollers 301 to 304 and extends over the heater roller 305.
The surface of the peeling belt 307 facing the heater roller 305 has sufficient adhesiveness to transfer and remove the image forming substance on the master master 2,
By the heater 304 and the heater roller 305, it is rotationally driven in a direction indicated by an arrow in FIG.

As described above, the heater roller 305
The heater 308 is built in, and the heater 30
8 heats the master master 2 held between the peeling belt 307 and the heater roller 305 to a predetermined temperature.

The master master 2 sent out from the set unit U1 is held between the peeling belt 307 and the heater roller 305 while being guided by the transport roller 301 and the peeling belt 307 as shown by an arrow in FIG. Then, while being held between the peeling belt 307 and the heater roller 305, the sheet wraps around the heater roller 305, is separated from the peeling belt 307 at the transport roller 304, and is sent to the wiping unit U <b> 5.

The pressure rubber roller 306 is provided around the heater roller 305. The pressure rubber roller 306 is separated from the peeling belt 30 by a pressure mechanism (not shown).
7, the heater roller 305 is pressed at a predetermined pressure. The contact pressure (pressing force) of the pressure rubber roller 306 with the heater roller 305 is lower than the thermal deformation pressure of the surface layer of the master master 2, that is, the material of the coat layer and the swelling layer.

Although only one pressing rubber roller 306 is shown in FIG. 1, the number is not limited to one, and a plurality of pressing rubber rollers 306 may be provided. Then, the performance of removing the image forming substance can be improved.

The cleaning unit (cleaning means) U4 includes a cleaning roller 401, a cleaning blade 402, a pressing rubber roller 403, and an image forming material receiving container 404 disposed so as to cover the cleaning roller 401 and the cleaning blade 402. And the cleaning roller 401
07 is placed in contact with the pressing rubber roller 403.

The cleaning roller 401 is rotationally driven to scrape the image forming substance transferred from the master master 2 onto the peeling belt 307, and
Reference numeral 02 cleans the image forming material on the peeling belt 307, which is in contact with the peeling belt 307 and is scraped off by the cleaning roller 401, for cleaning.

The image forming substance receiving container 404 stores therein the image forming substance scraped off from the peeling belt 307 by the cleaning roller 401 and the cleaning blade 402.

The master master 2 sent from the removal accelerating liquid applying unit U2 to the removal unit U3 is guided by the transport roller 301 and the peeling belt 307 of the removal unit U3, and the surface on which the image to be removed is formed is peeled. It is inserted between the peeling belt 307 and the heater roller 305 while facing the belt 307 side, and is sandwiched between the peeling belt 307 and the heater roller 305. Master Master 2
Is transported in a state of being sandwiched between the peeling belt 307 and the heater roller 305 and in a state of being adhered to the peeling belt 307 with a predetermined adhesive force by the adhesive force of the peeling belt 307, and being nipped. While being conveyed in this state, the master master 2 and the peeling belt 307 are relatively displaced by being heated by the heater 308 incorporated in the heater roller 305 and pressed by the pressing rubber roller 306. The image forming substance on the master master 2 is softened by heating, and in this state, the peeling belt 307 is used.
When the sheet is conveyed around the heater roller 305 while being held by the heater roller 305 and pressurized by the pressure rubber roller 306, a shear force is generated between the master master 2 and the peeling belt 307. Then, the image forming substance is peeled off from the master master 2 by the shearing force, transferred and removed to the peeling belt 307, and the master master 2 from which the image forming substance has been removed is sent out from the conveying roller 304 to the wiping unit U5.

Then, the peeling belt 307 after the peeling is completed.
Is the cleaning roller 4 of the cleaning unit U4.
The master master 2 is cleaned again by the cleaning blade 01 and the cleaning blade 402, and is again subjected to the reproduction process of the master master 2.

Wiping unit (wiping means) U5
Includes a liquid container 501, a liquid pumping roller 502, a felt roller 503, a pressing roller 504, and the like.
In the liquid container 501, a cleaning liquid (liquid material) 505 is stored.

The liquid pumping roller 502 and the felt roller 503 are rotated while contacting with a predetermined pressure, and the liquid pumping roller 502 is driven to rotate, thereby pumping up the cleaning liquid 505 in the liquid container 501 and making contact therewith. By being squeezed by the felt roller 503, a predetermined amount of the cleaning liquid 505 adheres to the felt roller 503.

Felt roller (wiping member) 503
Apply a small amount of the adhered predetermined amount of the cleaning liquid 505 to the image forming surface of the master master 2 sent out from the removing unit U3 between the pressing roller 504 and wipe the surface of the master master 2 After the master master 2 is cleaned by the cleaning liquid 505 and the felt roller 503, the master master 2 is sent to the paper discharge unit U6.

In FIG. 1, the lower side of the master master 2 is an image forming surface, and the felt roller 5
03 shows that the cleaning liquid 505 is applied, but the cleaning liquid 505 is applied to the master master 2.
Is not limited to this.

The cleaning liquid 505 is supplied to the removing unit U.
The cleaning liquid 505 is used for cleaning the hydrophilic portion of the master master 2 by removing the residue of the oily ink remaining on the surface of the master master 2 from which the image forming substance 20 has been removed in step 3. % Of a solution containing an alcohol solvent, or a liquid containing several% of a surfactant.

The paper discharge unit U6 includes a discharge roller 601, a paper discharge cassette 602, and the like.
The reproduced master master 2 sent out from 3 is placed and stored in a paper discharge cassette 602 by a discharge roller 601.

Further, the original printing apparatus 1 for offset printing
Although not shown, the original case 1 of the set unit U1
01, a master original plate detecting means for detecting whether or not there is a master original plate 2, a double feed detecting means for detecting the presence / absence of double feeding of the master original plate 2 by the set unit U1, and a temperature of the heater 308 of the removing unit U3. A temperature control unit and a full detecting unit for detecting whether or not the image forming substance in the image forming substance receiving container 404 is full are provided.

Next, the operation of the present embodiment will be described. In the original case 101 of the set unit U1 of the original printing apparatus for offset printing 1, a plurality of master originals 2 are set with their image forming surfaces facing down.

As described above, the master master 2 has, for example, a mirror image formed on a sheet-shaped offset printing master having a swelling layer provided on the substrate surface, or a mirror image formed thereon. Later, a water application process for imparting predetermined moisture is performed, and a small amount of printing is performed by an offset printing machine using oil-based ink, for example, 300 to 500 sheets.
This is used for printing about one sheet.

When the power supply is turned on and the master master 2 is placed on the master case 101 of the set unit U1 with the image forming surface facing down, the sheet is fed to the offset printing original reproducing apparatus 1. Roller 102 transfers master master 2 in master case 101 to master master 2 at the top.
, And sequentially fed to the removal accelerating liquid applying unit U2 via the registration roller 103. At this time, the registration roller 1
03, the timing is adjusted.

The removal-promoting-liquid applying unit U2 is provided with a master plate 2 used for offset printing from the set unit U1 and having an image forming substance adhered to the surface thereof.
02 and the pressing roller 203,
The image removal promoting liquid 204 in the liquid container 201 adheres to the liquid application roller 202, and the master master 2 is fed by the liquid application roller 202 to the press roller 203.
A small amount on the image forming surface of When the image removal accelerating liquid 204 is applied to the master master 2, the adhesive force between the image forming substance and the master master 2 is reduced.

The removal promoting liquid applying unit U2 sends out the master master 2 coated with the image removal promoting liquid 204 to the removing unit U3.

The removing unit U3 includes a plurality of transport rollers 3
The master master 2 conveyed between the heater roller 305 and the peeling belt 307 stretched over the heater roller 305 is held between the peeling belt 307 and the heater roller 305.
5 around.

The removing unit U3 holds the master master 2 with the heater 308 incorporated in the heater roller 52 while the master master 2 is held between the peeling belt 307 and the heater roller 305 and transported around the heater roller 305. 2 is heated and pressed by a pressure rubber roller 306 to remove the image forming substance on the master master 2 from the peeling belt 30.
7, and is discharged from the conveying roller 304 to the wiping unit U5.

Further, while the master master 2 held between the peeling belt 307 and the heater roller 305 is conveyed around the heater roller 305, the master
The heating temperature is equal to or higher than the softening point of the image forming substance and the surface layer of the master master 2, for example, the swelling layer, as described above. Is less than the thermal deformation temperature of the material of the surface layer, and the contact pressure (pressing force) between the heater roller 305 and the pressure rubber roller 306 with the peeling belt 307 sandwiched therebetween is the thermal deformation pressure of the material of the surface layer. Less than pressure.
In this state, when the master master 2 is held between the peeling belt 307 and the heater roller 305 and conveyed around the heater roller 305, the image forming material forming an image on the master master 2 is softened and peeled. Easy to do,
The image forming substance can be efficiently transferred and removed to the peeling belt 307.

As described above, the master master 2 from which the image forming substance has been transferred and removed to the peeling belt 307 is separated from the peeling belt 307 at the transport roller 304, and
It is sent to the wiping unit U5.

The image forming substance transferred to the peeling belt 307 is scraped off by the cleaning roller 401 and the cleaning blade 402 of the cleaning unit U4, and is stored in the image forming substance receiving container 404. The peeling belt 307 that has been cleanly cleaned by the cleaning unit U <b> 4 is again subjected to a process of reproducing the master master 2.

The wiping unit U5 draws up the cleaning liquid 505 in the liquid container 501 by the liquid pumping roller 502 which is driven to rotate, and the felt roller 50 comes into contact therewith.
3, a predetermined amount of cleaning liquid 505 is applied to the master master 2 sent from the removing unit U3 between the felt roller 503 and the pressing roller 504.
A small amount of a predetermined amount of the cleaning liquid 505 adhered to the felt roller 503 is applied, the surface of the master master 2 is wiped off, and the master master 2 is cleaned by the cleaning liquid 505 and the felt roller 503, and then sent to the paper discharge unit U6.

The paper discharging unit U6 is provided with a wiping unit U.
The master original 2 sent out from the tray 5 is stored in the paper discharge cassette 602.

As described above, the original printing plate reproducing apparatus 1 for offset printing according to the present embodiment converts the master original 2 on which the image is formed by the image forming substance by the offset printing into the master original printing unit U2. After applying the image removal accelerating liquid 204 to the image forming surface of No. 2, it is sandwiched between the peeling belt 307 of the removing unit U3 and the heater roller 305, conveyed around the heater roller 305, and formed from the master master 2. The material can be efficiently peeled off, transferred to and removed from the peeling belt 307, and the master master 2 can be regenerated. Further, the wiping unit U5 can remove the oil-based ink component remaining on the master master 2.

Then, the master original 2 to be reproduced is
As described above, on the surface of a sheet-like base material such as metal, paper, and polymer, a resin that is hydrophilic and solid at room temperature in the air, which swells with water but does not disappear by flowing out, is used as a main component. The film that easily removes adhered matter is fixed as a surface layer, and an image is formed on the surface with an image-forming substance in the form of a film using an electrophotographic image forming apparatus, and is provided for printing with oil-based ink. The image forming substance can be transferred and removed from the master master plate 2 to the peeling belt 307 to reproduce the image satisfactorily.

Further, the original printing apparatus for offset printing 1
The image forming material is transferred from the master master 2 to the peeling belt 307 by sandwiching the master master 2 between the heater roller 305 and the peeling belt 307 and transporting the periphery of the heater roller 305. The original printing plate reproducing apparatus 1 can be reduced in size.

FIG. 2 is a diagram showing a second embodiment of the apparatus for reproducing an original plate for offset printing, a method for reproducing an original plate for offset printing, and a method for producing a master original for offset printing according to the present invention.

In the description of this embodiment, the reference numerals used in the first embodiment will be used as they are, if necessary.

FIG. 2 shows an apparatus for reproducing an original for offset printing, a method for reproducing an original for offset printing and a method for producing a master for offset printing according to the second embodiment of the present invention. 700 is a schematic configuration diagram of an original printing apparatus 700 for offset printing.
Is a set unit U1-2, a removal unit U3-2,
Cleaning unit U4-2, wiping unit U5
-2 and a paper discharge unit U6-2.

The image forming substance removing apparatus 700 feeds the used master originals from the set unit U1-2 one by one to the removing unit U3-2, and removes the used master masters from the set unit U3-2.
The image forming material on the master master 2 is conveyed while being pressed and heated, pressed and transferred to the peeling member, and the image remaining on the master master is wiped off by the wiping unit U5-2. After the forming material is further removed, the image forming material transferred to the sheet discharging unit U6-2 is discharged and placed on the sheet discharging unit U6-2, and the image forming material transferred to the separating member is removed by the cleaning unit U4-2. Reuse.

Hereinafter, the units U1-2 to U6-2 will be sequentially described. The set unit U1-2 includes an original case 111, a paper feed roller 112, a pair of registration rollers 113, a transport roller 114, and the like. In the original case 111, a plurality of master originals 2 to be reproduced are stored. You.

The original case 111 has the same structure as that of the original case 101 of the first embodiment, and has a bottom plate urged upward by a spring or the like (not shown) to hold the master original 2 in the original case 111. The end on the paper feed roller 112 side is lifted upward.

The paper feed roller 112 is rotated at a predetermined timing by a drive motor (not shown) or the like, and the master original 2 in the original case 111 is moved to the uppermost master original 2.
Sequentially.

The master master 2 sent out by the paper feed roller 112 is prevented from being double fed by a separation mechanism (not shown).
Only one master master 2 is sent to the conveyance roller 114 by the registration roller 113 for timing adjustment and skew correction, and the conveyance roller 114 removes the master master 2 sent from the registration roller 113 by the removal unit U3- Convey to 2.

As the master master 2 set in the master case 111, of the master master 2 shown in the first embodiment, particularly, a surface layer having a hydrophilic property on the surface of the sheet-like base material. On the surface of the offset printing original plate on which is formed, an image is formed with a lipophilic image forming substance containing a solid-state image forming substance removing component at room temperature by an electrophotographic image forming apparatus, and is formed with an oil-based ink. It has been subjected to a predetermined number of offset printings.

The removal unit (removal means) U3-2 includes transport rollers 311 to 314, transport rollers 315 to 318,
Peeling rollers 319 to 321, pressure rubber rollers 322, 3
23 and sheet-like peeling belts 324 and 325, and the peeling rollers 319 to 321 have built-in heaters 326 to 328, respectively.

The peeling rollers 319 to 321 and the pressure rubber rollers 322 and 323 are arranged so as to be in contact with each other alternately, and are arranged in a zigzag manner.

[0127] The peeling belt (peeling member) 324 holds the master master 2 of a predetermined width, for example, various sizes.
It is formed in an endless ring shape having a width sufficient to peel and transfer the image forming substance on the master master 2,
Each of the peeling rollers 319 to 32 stretched over the transport rollers 311 to 314 and arranged in a zigzag shape.
1 and the pressure rubber rollers 322 and 323 are arranged in a zigzag fashion. The peeling belt (peeling member) 325 has a predetermined width,
For example, it is formed in an endless ring shape having a width sufficient to sandwich the master masters 2 of various sizes and to peel and transfer the image forming substance on the master master 2, and stretch over the transport rollers 315 to 318. In addition, each of the peeling rollers 319 to 321 and the pressing rubber rollers 322 and 323 arranged in a zigzag manner are arranged so as to sew them in a zigzag manner. At least the surfaces of the peeling belt 324 and the peeling belt 315 facing each other have sufficient adhesiveness to transfer and remove the image forming material on the master master 2.

Then, the peeling belt 324 and the peeling belt 3
Reference numeral 15 denotes a contact position between the transport roller 311 and the transport roller 315, which is tightly integrated.
After zigzag movement is performed between the separation rollers 319 to 321 and the pressure rubber rollers 322 and 323 disposed in a zigzag manner, and the separation rollers 313 and 314 are separated at the contact positions of the separation roller 312 and the separation roller 316, respectively. Then, it rotates to the transport roller 311 and the transport roller 315 via the transport rollers 317 and 318.

The peeling belts 324 and 325 are members for adhering to the image forming material on the master master 2 and peeling and transferring the image forming material from the master master 2. Although not specifically described, it is necessary that the image-forming substance has excellent adhesiveness and heat resistance to a certain degree or more, has little surface deterioration, and has good peeling properties.

The transport rollers 311 to 314, the transport rollers 315 to 318, the peeling rollers 319 to 321 and the pressure rubber rollers 322 and 323 are rotated by a drive mechanism (not shown) to form a tightly integrated peel belt 3.
24 and the peeling belt 315, the peeling rollers 319 to 321
1 is conveyed and moved from left to right in FIG. 1 so as to sew between the pressure rubber rollers 322 and 323 in a zigzag manner.

The peeling rollers 319 to 321 incorporate the heaters 326 to 328 as described above.
The master master 2, which is heated to a predetermined temperature by the heaters 326 to 328 and is held between the peeling belt 324 and the peeling belt 315 and conveyed, is heated to a predetermined temperature. As the heating temperature in this case, as described above, the image forming substances on the master master 2 are appropriately separated from the peeling belts 324, 32.
5, the temperature is higher than the softening point of the image forming substance and lower than the heat deformation temperature of the material of the surface layer of the master master 2;
As the contact pressure (pressing force) between the pressure roller 21 and the pressure rubber rollers 322, 323, a pressure lower than the thermal deformation pressure of the material of the surface layer is applied.

The master master 2 transported by the peeling belts 324 and 315 to the transport rollers 312 and 316 at the right end is separated from the peeling belts 324 and 315, and the wiping unit U5-
It is sent to 2.

The cleaning unit (cleaning means) U4-2 includes cleaning rollers 411 and 41.
2. Cleaning blades 413 and 414, cleaning roller 411 and cleaning blade 413, cleaning roller 412 and cleaning blade 414
Image forming substance receiving containers 415, 416, etc., which are disposed so as to cover
11, 412 and cleaning blades 413, 414
Are disposed so as to contact the peeling belt 324 and the peeling belt 315 at the transport roller 314 and the transport roller 318, respectively.

The cleaning blades 413 and 414 are
The image forming substances transferred from the master master 2 to the peeling belts 324 and 325 are brought into contact with the peeling belts 324 and 325, respectively.
412 is driven to rotate and the cleaning blade 41 is rotated.
Peeling belts 324 and 32 scraped off in 3, 414
5 to remove and clean the image forming substance.

The image forming substance receiving containers 415 and 416
The peeling belts 324 and 325 are cleaned by the cleaning blades 413 and 414 and the cleaning rollers 411 and 412.
The image forming substance scraped off from the container is stored inside.

The master master 2 sent from the set unit U1-2 to the removing unit U3-2 is transported by the transport roller 311 and the transport roller 315 of the removing unit U3-2.
Between the peeling belt 324 and the peeling belt 315, and is sandwiched between the peeling belt 324 and the peeling belt 315. Master master 2 with image forming substance formed
Is in a state of being sandwiched between the peeling belt 324 and the peeling belt 315, and
The peeling belt 324 and the peeling belt 3
15 is conveyed in a zigzag manner while being adhered to the sheet 15 with a predetermined adhesive force.
9 to 321, while being heated by heaters 326 to 328 incorporated in master master 2 and release belt 32.
4 and 325 are relatively displaced. The image forming substance of the master master 2 is softened by being heated, and in this state, the master master 2 and the peel belt 324 are conveyed in a zigzag manner while being pressed by the peel belts 324 and 315. A shear force is generated between the master master 2 and the master master 2 from which the image forming material has been removed. , Between the separation roller 312 and the separation roller 316.
It is sent to 2.

Then, the peeling belt 32 whose peeling has been completed is completed.
4 and 325 are cleaning units U4-2, respectively.
Are cleanly cleaned by the cleaning blades 413 and 414 and the cleaning rollers 411 and 412, and are again subjected to the reproduction process of the master master 2.

Wiping unit (wiping means) U5-
2 is a liquid container 511 for the lower surface, a liquid pumping roller 51
2, a felt roller 513, a liquid container 514 for the upper surface, a liquid pumping roller 515, a felt roller 516, and the like. The felt roller 513, which is a wiping member, and the felt roller 516 are disposed in contact with each other. In the liquid containers 511 and 514, the same cleaning liquid 505 as in the first embodiment is stored.

The lower surface liquid pumping roller 512 and the felt roller 513 are rotated while contacting with a predetermined pressure, and the liquid pumping roller 512 is driven to rotate, thereby pumping up the cleaning liquid 505 in the liquid container 511. By being squeezed by the felt roller 513 in contact therewith, a predetermined amount of the cleaning liquid 505 is discharged.
13 is attached.

The upper surface liquid pumping roller 515 and the felt roller 516 are rotated while contacting with a predetermined pressure, and the liquid pumping roller 515 is driven to rotate, thereby pumping up the cleaning liquid 505 in the liquid container 514. By being squeezed by the felt roller 516 in contact, a predetermined amount of the cleaning liquid 505 is supplied to the felt roller 5.
Attached to 16.

Felt roller 513 and felt roller 5
16 applies a small amount of the attached cleaning liquid 505 to the upper and lower surfaces of the master master 2 sent out from the removal unit U3-2 between the felt roller 513 and the felt roller 516, and applies a small amount of the cleaning liquid 505.
Is wiped off, the master master 2 is cleaned with the cleaning liquid 505 and felt rollers 513 and 516, and then sent out to the paper discharge unit U6-2.

The discharge unit U6-2 includes a discharge roller 61.
1 and a paper discharge cassette 612, etc., and the reproduced master master 2 sent out from the wiping unit U5-2 is placed and stored in the paper discharge cassette 612 by the discharge rollers 611.

Although not shown, the image forming substance removing apparatus 700 is a master original detecting means for detecting whether or not the master original 2 is present in the original case 111 of the set unit U1-2, and the master original 2 by the set unit U1-2. Double feed detecting means for detecting the presence or absence of double feed, jam detecting means for detecting the occurrence of jam in the master printing apparatus 700 for offset printing, and the heaters 326 to 328 of the removing unit U3-2. A temperature control means for controlling the temperature and a full detecting means for detecting whether or not the image forming substance in the image forming substance receiving containers 415 and 416 are full are provided.

Next, the operation of this embodiment will be described. When the power is turned on and a plurality of master originals 2 are placed in the original case 111 of the set unit U1-2, the master original 2 in the original case 111 is removed by the paper feed roller 112. Then, the sheet is fed to the removal unit U3-2 from the uppermost master original 2 via the registration roller 113 and the transport roller 114 in order. At this time, the timing is adjusted by the registration roller 113.

The removal unit U3-2 is stretched over a plurality of transport rollers 311 to 314 and transport rollers 315 to 318, and is disposed in a zigzag state between the transport rollers 311 and 315 and the transport rollers 312 and 316. A plurality of peeling rollers 319 to 321 and a pressure rubber roller 32
2, 323, the peeling belt 324 and the peeling belt 315, which are tightly integrated with the zigzag transporting path, are transported and moved.
6 to 328 heat the peeling rollers 319 to 321.

The master master 2 transported from the set unit U1-2 is transported by the transport rollers 311 and 3
15, sandwiched between the peeling belt 324 and the peeling belt 315, and the peeling belt 324 and the peeling belt 3
The peeling belt 324 and the peeling belt 3
The sheet 15 is conveyed on the zigzag conveying path while being adhered to the sheet 15 with a predetermined adhesive force.

The removal unit U3-2 zigzag transports the master master 2 on which an image is formed on one side thereof by the image forming substance and used for offset printing while the master master 2 is held tightly and integrally between the peeling belts 324 and 315. The master master 2 and the peeling belt 324 and the master master 2 and the peeling belt 315 are relatively displaced during the zigzag conveying path. A shear force is generated during The image forming substance is peeled off from the master master 2 by the shearing force, and is transferred and removed to the peeling belt 324 or the peeling belt 315.

Also, the peeling belt 324 and the peeling belt 31
5 is heated and pressurized by heaters 326 to 328 incorporated in the peeling rollers 319 to 321 while being transported in the zigzag transport path. A temperature not lower than the softening point of the image forming substance and lower than the heat deformation temperature of the material of the surface layer of the master master 2;
The contact pressure (pressing force) between the pressure roller 21 and the pressure rubber rollers 322 and 323 is lower than the heat deformation pressure of the material of the surface layer.
In this state, when the master master 2 is held between the peeling belt 324 and the peeling belt 315 and is conveyed in a zigzag conveyance path, the image forming material forming an image on the master master 2 is softened and easily peeled. In this state, the image forming substance can be efficiently transferred and removed to the peeling belt 324 or 315.

As described above, the master master 2 on which the image forming substance has been transferred and removed to the peeling belt 324 or 315 is transported by the transport roller 312 and the transport roller 312.
The sheet is separated from the peeling belt 324 and the peeling belt 315 at 16 portions, sent out to the paper discharge unit U6-2, and stored in the paper discharge cassette 612 of the paper discharge unit U6-2.

The image forming substance transferred to the peeling belt 324 or 315 is applied to the cleaning blades 413 and 41 of the cleaning unit U4-2.
4 and the cleaning rollers 411 and 412, and are stored in image forming substance receiving containers 415 and 416. The peeling belt 324 and the peeling belt 315 that have been cleanly cleaned by the cleaning unit U4-2 are again subjected to the reproduction process of the master master 2.

As described above, the original printing plate reproducing apparatus 700 for offset printing holds the master original 2 on which the image is formed by the image forming material, between the peeling belt 324 and the peeling belt 315 which are in close contact with the removing unit U3-2. Thus, the image forming substance is efficiently peeled off from the master master 2 by being transported in the zigzag transport path, and is transferred and removed to the peeling belt 324 or the peeling belt 315, so that the master master 2 can be reproduced.

The master master 2 to be reproduced is
A sheet having a hydrophilic surface layer formed on the surface of a sheet-like substrate is used as an offset printing master, and the surface of the offset printing master is solid at room temperature with an electrophotographic image forming apparatus. An image is formed with a lipophilic image forming substance containing an image forming substance removing component,
The image forming substance can be appropriately transferred and removed from the master master 2 to the peeling belts 324 and 325 in a dry manner without using an image removal accelerating liquid as in the first embodiment, and good reproduction can be performed.

FIG. 3 is a view showing a third embodiment of a master master, an image forming substance removing apparatus and an image forming substance removing method according to the present invention.

In the description of the present embodiment, the reference numerals used in the description of the first embodiment will be used as needed.

FIG. 3 is a schematic block diagram of an offset printing original reproducing apparatus 800 to which a third embodiment of a master original, an image forming substance removing apparatus and an image forming substance removing method according to the present invention is applied. Original plate reproducing device 80
Reference numeral 0 denotes a small-sized image forming substance removing device that efficiently removes the image forming substance on one side of the master master, and includes a set unit U1-3, a removing unit U3-3, and a wiping unit U.
5-2 and a paper discharging unit U6-3.

The original printing apparatus 800 for offset printing includes:
The used master masters are fed one by one from the set unit U1-3 to the removing unit U3-3, and the master unit is transported while being heated and pressurized by the roll-shaped peeling member in the removing unit U3-3. The image forming substance on the master master is transferred and removed to a peeling member, and a wiping unit U5-3 is used.
After the image forming substance remaining on the master original is further removed, the paper is discharged and placed on the paper discharge unit U6-3.

Hereinafter, the units U1-3 to U6-3 will be sequentially described. The set unit U1-3 includes an original case 121, a paper feed roller 122, a pair of registration rollers 123, and the like. In the original case 121, the image forming surface to be removed by the master original 2 to be reproduced is placed on the lower side. A plurality of sheets are stored in a state facing.

As in the first embodiment, the original case 121 has a bottom plate on which the master original 2 is placed. The bottom plate is urged upward by a spring (not shown) or the like. Master master 2 in master case 121
Of the paper feed roller 122 is lifted upward.

The master master 2 set in the master case 121 is, among the master masters 2 described in the first embodiment, particularly the surface of a sheet-like base material such as metal, paper, or polymer. As a master for offset printing, a material having a hydrophilic layer which does not disappear by swelling with water but disappears and is fixed as a surface layer at room temperature in the air and which has a solid resin as a main component is fixed. An image is formed on the surface of the original plate for offset printing with a film-like image forming substance by an electrophotographic image forming apparatus, and is subjected to a predetermined number of offset printings with oil-based ink.

The paper feed roller 122 is rotated at a predetermined timing by a drive motor (not shown) or the like, and the master original 2 in the original case 121 is moved to the uppermost master original 2.
Sequentially.

The master master 2 sent out by the paper feed roller 122 is prevented from being double fed by a separation mechanism (not shown).
Only one master master 2 is transported to the removal unit U3-3 by the registration roller 123 for timing adjustment and skew correction.

The removing unit (removing means) U3-3 includes a feed roller 331, a take-up roller 332, transport rollers 333 and 334, a pressure rubber roller 335, a separation roller 336, a heater roller 337, a sheet-like peeling belt 338, and the like. The heater roller 337 includes a heater 339.

The peeling belt (peeling member) 338 is a member for adhering to the image forming substance on the master master 2 and peeling and transferring the image forming substance from the master master 2. Similarly to the peeling belt 307, the image forming material is formed into a long sheet having a predetermined width, for example, a width sufficient to peel and transfer the image forming material on the master master 2 of various sizes. It is necessary to be excellent in adhesiveness and heat resistance to a certain degree or more, to have little surface deterioration, and to have good peeling properties. The peeling belt 338 is
It is wound in a roll shape around the delivery roller 331, and is provided with conveyance rollers 333 and 334 and a pressure rubber roller 335.
And a separation roller 336, and the leading end thereof is wound around a take-up roller 332. Peeling belt 3
Reference numeral 38 denotes a surface facing the heater roller 337 having sufficient adhesiveness to transfer and remove the image forming material on the master master 2, and includes a take-up roller 332, transport rollers 333 and 334, a separation roller The rotation is driven in the direction shown by the arrow in FIG.

The heater roller 337 is, as described above,
The heater 339 is built in, and the heater 33
9 is heated to a predetermined temperature and transported between the peeling belt 338 and the heater roller 337.
Is heated to a predetermined temperature.

In the removing unit U3-3, the master master 2 sent out from the set unit U1-3 is used as shown in FIG.
As shown by an arrow in FIG. 7, the heater roller 337 and the pressure rubber roller 335 are fed into a portion between the conveyor belt 338 and the heater roller 337 where the heater roller 337 and the pressure rubber roller 335 are in contact with each other.
During this time, the master master 2 is nipped, separated from the separation belt 338 at the separation roller 336, and sent to the wiping unit U5-3.

The removal unit U3-3 is provided with the heater roller 337 and the pressure rubber roller 335 in a state where the master original 2 sent from the set unit U1-3 faces the peeling belt 338 with the surface on which the image to be removed faces. The peeling belt 338 and the heater roller 337
The master master 2 is pressed against the peeling belt 338 by the pressure rubber roller 335 and is heated by the heater 339 incorporated in the heater roller 337 to soften the image forming material of the master master 2. Accordingly, the removal unit U3-3 brings the master master 2 into close contact with the transport belt 338 and winds the transport belt 338 from the delivery roller 331 as shown by the arrow in FIG. It is wound around a roller 332. Therefore, Master Master 2
The separation roller 336 is in close contact with the peeling belt 338.
Is transported to the transport belt 338 by the separation roller 336.
And is sent to the wiping unit U5-3. When separated by the separation roller 336, the image forming substance of the master master 2 is separated from the master master 2,
The master master 2 transferred and removed from the peeling belt 338 and from which the image forming substance has been removed is sent from the separation roller 336 to the wiping unit U5-3.

Then, the peeling belt 338 after the peeling is completed.
Is taken up by a take-up roller 332 via a transport roller 334.

Wiping unit (wiping means) U5-
Reference numeral 3 includes a liquid container 521, a liquid pumping roller 522, a felt roller 523, a pressing roller 524, and the like. The liquid container 521 contains the same cleaning liquid 505 as in the first embodiment. .

The liquid pumping roller 522 and the felt roller 523 are driven to rotate while abutting at a predetermined pressure, and the liquid pumping roller 522 is driven to rotate, thereby pumping up the cleaning liquid 505 in the liquid container 521 and coming into contact therewith. By being squeezed by the felt roller 523, a predetermined amount of the cleaning liquid 505 is made to adhere to the felt roller 523.

The felt roller 523 applies a small amount of the adhering cleaning liquid 505 to the image forming surface of the master master 2 sent out from the removing unit U3-3 between the pressing roller 524 and the master cleaning liquid 505. The image forming surface of the master 2 is wiped off, and a cleaning solution 5
After the master master 2 is cleaned by the master roller 05 and the felt roller 523, the master master 2 is sent out to the sheet discharging unit U6-3.

In FIG. 3, the lower side of the master master 2 is the image forming surface, and the felt roller 5
23 shows that the cleaning liquid 505 is applied.
Is not limited to this.

The paper discharging unit U6-3 includes a discharging roller 62.
1 and a discharge cassette 622, etc., and the reproduced master master 2 sent out from the removal unit U3-3.
Is placed and stored in the paper discharge cassette 622 by the discharge roller 621.

Also, the original printing apparatus for offset printing 80
Although not shown, 0 is a master original detecting means for detecting whether or not the master original 2 is present in the original case 121 of the set unit U1-3, and detecting the presence or absence of double feeding of the master original 2 by the set unit U1-3. A double feed detection unit and a temperature control unit for controlling the temperature of the heater 339 of the removal unit U3-3 are provided.

Next, the operation of this embodiment will be described. When the power is supplied to the offset printing original reproducing apparatus 800 and a plurality of used master originals 2 are placed in the original case 121 of the set unit U1-3 with the image forming surface facing down, the power is supplied. The master original 2 in the original case 121 is moved by the paper roller 122 to the uppermost master original 2.
From the removal unit U via registration rollers 123 in order.
Send to 3-3. At this time, the timing is adjusted by the registration roller 123.

In the removing unit U3-3, the sheet-like conveying belt 338 is sent out from a sending-out roller 331 wound around a roll to a take-up roller 332 via conveying rollers 333 and 334, a pressure rubber roller 335 and a separating roller 336. Pressurized rubber roller rubber roller 335
The portion is in contact with the heater roller 337. The master master 2 is sent out from the set unit U1-3 between the heater roller 337 and the transport belt 338.

The removal unit U3-3 includes a set unit U3 between the heater roller 337 and the conveyor belt 338.
While the master master 2 sent out from 1-3 is heated by the heater 339 incorporated in the heater roller 337, the master master 2 is pressurized by the pressing rubber roller 335.
Softens the image forming substance of
8, the image forming substance forming an image on the master master 2 is softened and easily peeled off, and the master master 2 is transported by the separation roller 336 to the transport belt 338.
And sent to the wiping unit U5-3.
Therefore, at the separation roller 336, the transport belt 338 is used.
When separated from the image forming material, the image forming substance can be efficiently transferred and removed to the peeling belt 338.

Then, the peeling belt 338 to which the image forming substance has been transferred is sent to the take-up roller 332 via the transport roller 334, and is taken up by the take-up roller 332.

In the wiping unit U5-3, the cleaning liquid 505 in the liquid container 521 is pumped up by the liquid pumping roller 522 which is driven to rotate, and a predetermined amount of the cleaning liquid 505 is adhered to the felt roller 523 which comes into contact therewith. A small amount of a predetermined amount of the cleaning liquid 505 attached to the felt roller 523 is applied to the master master 2 sent from the removing unit U3-3 between the pressing roller 523 and the pressing roller 524, and the cleaning liquid 50
After the master master 2 is cleaned by the roller 5 and the felt roller 523, the master master 2 is sent to the sheet discharging unit U6-3.

The paper discharge unit U6-3 stores the master original 2 sent from the wiping unit U5-3 in the paper discharge cassette 622.

As described above, the original printing plate reproducing apparatus 800 for offset printing uses the small original removing unit U3 provided with the roll-shaped transport belt 338 to transfer the master original 2 on which the image is formed with the image forming material by the offset printing. -3, the sheet is conveyed between the conveyor belt 338 and the heater roller 305, heated and pressurized, and the image forming substance is efficiently peeled off from the master master 2 and transferred / removed to the peeling belt 338.
While the master master 2 is reproduced, the oil-based ink component remaining on the master master 2 can be further removed by the wiping unit U5-3.

Therefore, the image forming substance can be more easily and easily removed from the master master 2 by using the releasability of the surface layer without using a liquid material, and the master can be reproduced at low cost as an offset printing master. , Having the printing durability of small-sized printing of about 300 sheets or less, and providing a master master for offset printing for water-based ink in a simple manner. Good maintainability can be achieved.

[0182]

EXAMPLES Example 1 The following experiment was conducted using the original printing apparatus 1 for offset printing according to the first embodiment.

First, as a master for offset printing of the master master 2, a sheet coated with a film for easily removing adhering substances disclosed in the above-mentioned JP-A-6-222604, or a sheet previously proposed by the present applicant. Kaihei 7-311523
Using a recording material disclosed in Japanese Patent Application Publication No.
A master image 2 obtained by printing a mirror image with a mirror function of image processing software using SP-10 Mark II Pro manufactured by Ricoh Co., Ltd. was used.

This master master 2 was set in an offset printing machine for oil-based ink, and 300 copies were printed.

After that, the master master 2 is taken out of the offset printing machine, and the master case 1 of the set unit U1 of the master printing apparatus 1 for offset printing of the first embodiment is taken out.
01, and the reproduction process of the master original 2 was performed by the offset printing original reproduction device 1 as described in the first embodiment.

At this time, as the image removal accelerating liquid 204, 1
Using a liquid containing 0% or less of a surfactant, the heating temperature of the heater roller 305 of the removal unit U3 is set to 95 ° C. or higher.
The temperature is set within the range of 110 ° C.
06 was set to about 2 kg / cm 2. Further, as the cleaning liquid 505 for the wiping unit U5, a solution containing a few percent alcohol solution was used.

When the master plate 2 was regenerated by the offset printing plate reproducing device 1 under the above conditions, the image forming substance on the master plate 2 could be removed cleanly, and the master plate 2 was reproduced as the offset printing plate. Was completed.

The reproduced offset printing master was again formed into a mirror image by an electrophotographic printer and printed as a master master 2 by an offset printing machine. As a result, 200 to 300 copies could be printed. did it.

<Comparative Example 1> [0189] A mirror image was formed in the same manner as in Example 1 above, except that only a polyvinyl alcohol (PVA) was used as the surface layer of the substrate as an offset printing master of master master 2. This was set as a master master 2 in an offset printing machine and 300 copies were printed. In the offset printing, the first embodiment is used.
In the same manner as in the above, printing could be performed cleanly.

However, the master master 2 on which printing has been performed is subjected to a reproduction process under the same conditions as in the first embodiment, and offset printing is to be performed using the master master 2 which has been reproduced. Was inappropriate.

Comparative Example 2 Using the offset printing master obtained by reproducing the master master 2 in Example 1, a mirror image was formed again by an electrophotographic printer to obtain the master master 2, When continuous printing was performed with more than 300 copies using a printing machine, when the number of copies reached 350 to 500, the background stain of the image occurred in a portion corresponding to the hydrophilic portion (non-image forming portion) of the master master 2. Then, printing failure occurred.

<Embodiment 2> The applicant of the present invention disclosed in Japanese Unexamined Patent Publication No.
Using the image forming substance disclosed in 177272,
An image formed in the same manner as in Example 1 was used as master master 2
And the following experiment was performed.

The image forming substance disclosed in Japanese Patent Application Laid-Open No. H10-177272 contains an image removal accelerating substance which is solid at room temperature and solid at room temperature to which an organic surfactant which melts by heating is added. .

This master master 2 was set in an offset printing machine for oil-based ink, and 300 copies were printed.

Thereafter, the master master 2 is taken out of the offset printing press and set in the master case 111 of the set unit U1-2 of the offset printing master reproducing apparatus 700 according to the second embodiment. At 700, the reproduction process of the master master 2 is performed as described in the second embodiment.

At this time, the heating temperature of the heater rollers 319 to 321 is set in the range of 95 ° C. to 110 ° C., and the cleaning liquid 505 of the wiping unit U5-2 is set at several%.
A solution containing an alcohol solution was used.

When the master plate 2 is regenerated by the offset printing plate reproducing device 700 under the above conditions, the image forming substance on the master plate 2 can be removed cleanly and reproduced as an offset printing plate. Was completed.

Further, the original printing plate reproducing apparatus 700 for offset printing according to the second embodiment does not apply an image removal accelerating liquid to the master original 2 before transporting the master original 2 to the removing unit U3-2. Therefore, the processing speed for processing one master master 2 could be increased, and processing could be performed in about 1 to 1.5 seconds.

The regenerated master master 2 was reprinted into an offset printing master, a mirror image was formed again by an electrophotographic printer to form a master master 2, and printing was performed by an offset printing machine. The number of copies could be printed.

<Comparative Example 3> [0200] Except that the heating temperature of the heater rollers 319 to 321 was set to 180 ° C using the original printing apparatus 700 for offset printing according to the second embodiment.
Under the same conditions as in Example 2, the master master 2 of Example 2 was used.
And the hot offset of the image forming material on the master master 2 to the peeling belt 324 or the peeling belt 325 was attempted, but could not be completely removed from the master master 2. Also, the heater roller 319
Since the heating temperature of ３２321 was as high as 180 ° C., the master master 2 was slightly deformed.

Example 3 An image was formed on an offset printing original plate similar to the master original plate 2 of Example 1 in the same manner as in Example 1, and then 0.1 g to 0.5 g of water equivalent to A4. Or 0. An offset printing machine for coating an aqueous solution containing a surfactant of several percent to less than several percent and stabilizing a hydrophilic portion as a master master 2 using the master master 2 as an oil-based ink To print 1000 copies.

Thereafter, the master master 2 was taken out of the offset printing press, and subjected to a reproduction process of the master master 2 in the same manner as in the first or second embodiment.
The image-forming substance on the master master 2 could be removed cleanly, and the master could be reproduced as an offset printing master. By the heating in this regeneration treatment, the applied water film was initialized.

The master plate for offset printing obtained by regenerating the master plate 2 was again formed into a master image by forming a mirror image with an electrophotographic printer, and was printed by an offset printing machine. The printing resistance was improved about 2 to 3 times compared to the master master 2 not coated.

Example 4 As a master master 2, a base material coated with a swelling layer on its surface was used as an offset printing master, and the mirror function of image processing software was used using an electrophotographic image forming apparatus. The master image 2 printed with the mirror image is used as a master master 2, and the master master 2 is set on an offset printing machine for water-based ink.
0 copies were printed.

However, the image-forming substance used here is an acrylic-based resin having a hydrophilic property as a main binder or a commercially available image-forming substance to which an acrylic-based resin is added for electrophotography. The characteristics are adjusted in advance.

Thereafter, the master master 2 is taken out of the offset printing machine and set in the master case 121 of the set unit U1-3 of the offset printing master reproducing apparatus 800 of the third embodiment. At 800, the reproduction process of the master master 2 was performed as described in the third embodiment.

[0207] Since the swelling layer is coated on the surface of the substrate as described above, the master for offset printing of the master master 2 can transfer the image-forming substance to paper or wood chips. Cleaning can be simplified.

In this case, the cleaning liquid 50 of the wiping unit 5-3 of the offset printing original plate reproducing apparatus 800 is used.
As No. 5, a wiping treatment is performed using a substance containing a surfactant at a level of several%.

When the master plate 2 was regenerated by the offset printing plate reproducing apparatus 800 under the above conditions, the image forming substance on the master plate 2 could be removed cleanly, and the master plate 2 was reproduced as the offset printing plate. Was completed.

The master plate for reproduction of offset printing obtained by reproducing the master plate 2 was again formed into a master image by forming a mirror image with an electrophotographic printer, and printing was performed with an offset printing machine. We were able to.

An image is formed on the master plate for offset printing of the master plate 2 in the same manner as described above.
g to 0.5 g / A4 or water or 0.1 g / A4. The master plate 2 was coated with an aqueous solution containing a surfactant of several percent to less than several percent to stabilize the hydrophilic portion, and was printed with an offset printing machine in the same manner as described above. Compared to Master Master 2,
The printing resistance was improved about 2 to 3 times.

The invention made by the present inventor has been specifically described based on the preferred embodiments. However, the present invention is not limited to the above, and various modifications can be made without departing from the gist of the invention. It goes without saying that it is possible.

[0213]

According to the apparatus for recycling an original plate for offset printing according to the first aspect of the present invention, a hydrophilic material which swells with water but does not flow out and disappears on the surface of a sheet-like base material such as metal, paper or polymer. Using an offset printing original plate with an adhesive and easy-to-removal coating composed mainly of a resin that is solid at room temperature in the air and fixed as a surface layer, and the surface of which is coated with an electrophotographic image forming apparatus. After forming an image with the image forming substance and performing a predetermined number of printings with an oil-based ink as a master master for offset printing, the master master for offset printing was coated with a predetermined peeling removal accelerating liquid, and the peeling removal accelerating liquid was applied. The image forming surface of the master master for offset printing is pressurized while being heated to a predetermined temperature in a state in which the image forming surface is in close contact with a predetermined release member, and the image forming substance is transferred from the master master for offset printing to the release member. The image forming substance transferred to the peeling member is removed from the peeling member by copying / removing, and is reused again, and several percent of a lipophilic substance solubilizing agent is added to the master master for offset printing from which the peeling member has been removed. Since the master material for offset printing to which the liquid material has been applied and the liquid material has been applied is wiped off with a predetermined wiping member, the image forming substance is easily and easily removed from the master plate for offset printing to reproduce the master material for offset printing. And a printing apparatus for offset printing masters capable of easily providing a master master for offset printing intended for oil-based inks, having a printing durability of a small amount of printing of about 300 sheets or less. Can be provided.

According to the apparatus for reproducing an original plate for offset printing according to the second aspect of the present invention, an original plate for offset printing in which a hydrophilic surface layer is formed on the surface of a predetermined sheet-like base material is used. An image is formed on a surface of the layer by an electrophotographic image forming apparatus using a lipophilic image forming substance containing a solid-state image forming substance removing component at room temperature, and a predetermined number of master sheets for offset printing are formed using oil-based ink. After being subjected to the printing, the image forming surface of the master plate for offset printing is heated to a predetermined temperature while being pressed while being in close contact with a predetermined release member, and the image forming substance is removed from the master plate for offset printing to the release member. The transfer / removal, the image forming substance transferred to the release member is removed from the release member and reused again, and the offset printing mass from which the release member has been removed. -Applying a liquid containing several percent of a lipophilic substance solubilizer to the master and wiping the master master for offset printing on which the liquid is applied with a predetermined wiping member, so that the liquid is applied when removing the image forming substance. It is possible to more easily and easily remove the image forming substance from the master master for offset printing in a dry manner and to reproduce the same as the master for offset printing at low cost.
It is possible to provide a reproduction apparatus of an offset printing original plate which has printing durability of small amount printing of about 0 or less and can easily provide a master plate for offset printing for oil-based ink. .

According to the apparatus for recycling an original plate for offset printing according to the third aspect of the present invention, the surface of a sheet-like base material such as metal, paper, or polymer has a predetermined releasability and a predetermined performance against an image forming substance. As a master plate for offset printing, a film having compatibility of is used as a surface layer, and an image is formed on the surface by an image forming substance in a film form by an electrophotographic image forming apparatus. After providing a predetermined number of prints with the aqueous ink, pressurizing while heating to a predetermined temperature in a state where the image forming surface of the master master for offset printing is in close contact with a roll-shaped peeling member sent from the sending side to the winding side. Then, the image forming substance is transferred from the master master for offset printing to the release member and removed, and a few percent lipophilic substance solubilizing agent is applied to the master master for offset printing from which the release member has been removed. Since the master material for offset printing to which the liquid agent has been applied is wiped off with a predetermined wiping member by applying the liquid agent, the offset printing can be more easily and easily performed without using the liquid agent by utilizing the releasability of the surface layer. The image forming substance can be removed from the master master for printing, and the offset printing master can be reproduced inexpensively, and has printing durability of a small amount printing of about 300 sheets or less,
In addition, it is possible to provide an inexpensive and easy-to-maintain offset printing master reproduction apparatus that can easily provide an offset printing master for an aqueous ink.

According to the method for regenerating an original plate for offset printing according to the fourth aspect of the present invention, a hydrophilic material which swells with water but does not flow out and disappears on the surface of a sheet-like base material such as metal, paper and polymer. Using an original plate for offset printing, in which an easily removable coating mainly composed of a resin in solid form at room temperature in the air is fixed as a surface layer, a film-like image is formed on the surface by an electrophotographic image forming apparatus. After forming an image with a substance and providing a predetermined number of prints with an oil-based ink as a master master for offset printing, the master master for offset printing is coated with a predetermined stripping / removal promoting liquid, and the offset printing is applied with the peeling / removal promoting liquid. The image forming material is transferred from the master master for offset printing to the peeling member by applying pressure while heating to a predetermined temperature in a state in which the image forming surface of the master for printing is brought into close contact with a predetermined peeling member.・ Removed, the image forming substance transferred to the peeling member is removed from the peeling member and reused, and the master for offset printing from which the peeling member has been removed contains several percent of a lipophilic substance solubilizer. Since the master material for offset printing to which the liquid material has been applied and the liquid material has been applied is wiped off with a predetermined wiping member, the image forming substance is easily and easily removed from the master plate for offset printing to reproduce the master material for offset printing. And a method for reproducing an offset printing original plate that has a printing durability of a small amount printing of about 300 sheets or less and can easily provide an offset printing master original target for oil-based ink. can do.

According to the method of recycling an original plate for offset printing according to the fifth aspect of the present invention, an original plate for offset printing in which a hydrophilic surface layer is formed on the surface of a predetermined sheet-like substrate is used. An image is formed on a surface of the layer by an electrophotographic image forming apparatus using a lipophilic image forming substance containing a solid-state image forming substance removing component at room temperature, and a predetermined number of master sheets for offset printing are formed using oil-based ink. After being subjected to the printing, the image forming surface of the master plate for offset printing is heated to a predetermined temperature while being pressed while being in close contact with a predetermined release member, and the image forming substance is removed from the master plate for offset printing to the release member. The transfer / removal, the image forming substance transferred to the release member is removed from the release member and reused again, and the offset printing mass from which the release member has been removed. -Applying a liquid containing several percent of a lipophilic substance solubilizer to the master and wiping off the master master for offset printing to which the liquid has been applied with a predetermined wiping member, so that a liquid is applied when removing the image forming substance. It is possible to more easily and easily remove the image forming substance from the master master for offset printing in a dry manner and to reproduce the same as the master for offset printing at low cost.
Reproduction of an inexpensive and easy-to-maintain offset printing master that has printing durability for small-volume printing of about 0 sheets or less and can easily provide an offset printing master master for oil-based ink. A method can be provided.

According to the method of recycling an original plate for offset printing according to the sixth aspect of the present invention, the surface of a sheet-like base material such as metal, paper, or polymer has a predetermined release property and a predetermined As a master plate for offset printing, a film having compatibility of is used as a surface layer, and an image is formed on the surface by an image forming substance in a film form by an electrophotographic image forming apparatus. After providing a predetermined number of prints with the aqueous ink, pressurizing while heating to a predetermined temperature in a state where the image forming surface of the master master for offset printing is in close contact with a roll-shaped peeling member sent from the sending side to the winding side. Then, the image forming substance is transferred from the master master for offset printing to the release member and removed, and a few percent lipophilic substance solubilizing agent is applied to the master master for offset printing from which the release member has been removed. Since the master material for offset printing to which the liquid agent has been applied is wiped off with a predetermined wiping member by applying the liquid agent, the offset printing can be more easily and easily performed without using the liquid agent by utilizing the releasability of the surface layer. The image forming substance can be removed from the master master for printing, and the offset printing master can be reproduced inexpensively, and has printing durability of a small amount printing of about 300 sheets or less,
In addition, it is possible to provide an inexpensive and easy-to-maintain offset printing master reproduction method that can easily provide an offset printing master for an aqueous ink.

According to the method for producing a master master for offset printing according to the present invention, the hydrophilicity which swells with water but does not flow out and disappears on the surface of a sheet-like base material such as metal, paper or polymer. Hydrophilic on the surface of an offset printing original plate in which an easily-removable film mainly composed of a resin in solid form at room temperature in the air is fixed as a surface layer, or on the surface of a predetermined sheet-shaped substrate When creating an offset printing master using an electrophotographic image forming apparatus to form an image with a film-like image forming material on the surface of the offset printing master having a surface layer having Since a predetermined liquid is applied to the surface of the ink, the stability of the hydrophilic portion on the master master for offset printing is improved, and the remaining of contaminants of the oil-based ink can be prevented. Can, it is possible to reproduce easily and readily, it is possible to improve the printing endurance.

[Brief description of the drawings]

FIG. 1 is a schematic configuration of an offset printing original reproduction apparatus to which a first embodiment of an offset printing original reproduction apparatus, an offset printing original reproduction method, and an offset printing master original preparation method according to a first embodiment of the present invention is applied. FIG.

FIG. 2 is a schematic configuration of an offset printing original plate reproducing apparatus to which a second embodiment of the offset printing original plate reproducing apparatus, the offset printing original plate reproducing method, and the offset printing master original preparing method of the present invention is applied. FIG.

FIG. 3 is a schematic configuration of an offset printing original reproduction apparatus to which a third embodiment of an offset printing original reproduction apparatus, an offset printing original reproduction method, and an offset printing master original preparation method according to a third embodiment of the present invention is applied. FIG.

[Explanation of symbols]

1, 700, 800 Offset printing original plate reproducing device 2 Master original plate U1, U1-2, U1-3 Set unit U2 Removal promoting liquid applying unit U3, U3-2, U3-3 Removal unit U4, U4-2 Cleaning unit U5 , U5-2, U5-3 Wiping unit U6, U6-2, U6-3 Discharge unit 101, 111, 121 Original case 102, 112, 122 Feed roller 103, 113, 123 Registration roller 104, 114 Transport roller 201 Liquid container 202 Liquid application roller 203 Holding roller 204 Image removal accelerating liquid 301-304, 311-318, 333, 334 Conveyance roller 305, 337 Heater roller 306, 322, 323, 335 Pressurized rubber roller 307, 324, 325, 338 Peeling Belt 308, 3 26 to 328, 339 Heater 319 to 321 Peeling roller 331 Sending roller 332 Winding roller 336 Separating roller 401, 411, 412 Cleaning roller 402, 413, 414 Cleaning blade 403 Pressing rubber roller 404, 415, 416 Image forming material receiving container 501 511, 514, 521 Liquid container 502, 512, 515, 522 Liquid pumping roller 503, 513, 516, 523 Felt roller 504, 524 Pressing roller 505 Cleaning liquid 601, 611, 621 Discharge rollers 602, 612, 622 Discharge cassette

Claims (7)

[Claims] 1. A hydrophilic substance which is swelled with water but does not flow out and disappears on the surface of a sheet-like base material such as metal, paper, and polymer, and which is mainly composed of a solid resin at room temperature in the air. An easily removable film is fixed as a surface layer, and an image is formed on the surface thereof by an electrophotographic image forming apparatus using a film-like image forming substance, and is used as a master for offset printing for a predetermined number of prints using oil-based ink. A liquid recoating device for applying a predetermined peeling removal promoting liquid to the master plate for offset printing,
The image forming surface of the master for offset printing coated with the separation removal promoting liquid is pressed against the predetermined master while being heated to a predetermined temperature in a state in which the master is in close contact with a predetermined separating member, and the image forming is performed from the master for offset printing. Removing means for transferring / removing a substance to / from the peeling member; cleaning means for removing the image forming substance transferred to the peeling member from the peeling member and reusing the image forming substance for reuse by the removing means; A solution containing several percent of a lipophilic substance solubilizing agent is applied to the offset printing master master from which the release member has been removed, and the offset printing master master coated with the solution is wiped with a predetermined wiping member. Wiping means, wherein the offset printing master master is reproduced as the offset printing master. Tsu door printing plate precursor of the playback device. 2. A surface layer having a hydrophilic property is formed on the surface of a predetermined sheet-like substrate, and a solid component for removing an image-forming substance at room temperature by an electrophotographic image forming apparatus is formed on the surface of the surface layer. A master for offset printing, which is formed with an lipophilic image-forming substance containing the same, as a master for offset printing, is used for printing a predetermined number of sheets with oil-based ink. Removing means for transferring and removing the image forming substance from the master master for offset printing to the peeling member by heating to a predetermined temperature while applying pressure in a state where the image forming surface is in close contact with a predetermined peeling member; Cleaning means for removing the image forming substance transferred to the peeling member from the peeling member and reusing the same by the removing means; Wiping means for applying a liquid containing several percent of a lipophilic substance solubilizer to the offset printing master plate from which the members have been removed, and wiping the offset printing master plate coated with the liquid agent with a predetermined wiping member. And reproducing the master master for offset printing into the master for offset printing. 3. A film having a predetermined release property and a predetermined compatibility with an image forming substance is immobilized as a surface layer on the surface of a sheet-like base material such as metal, paper, or polymer, An image forming apparatus using a film-like image forming substance in an electrophotographic image forming apparatus, as a master master for offset printing, a reproduction apparatus for an offset printing master to be subjected to a predetermined number of printing with aqueous ink, The image forming surface of the offset printing master is brought into close contact with the roll-shaped peeling member fed from the side to the winding side, and is heated to a predetermined temperature and pressurized to form the image from the offset printing master. Transfer the substance to the release member
Removing means for removing, and applying a liquid containing several percent of a lipophilic substance solubilizer to the master master for offset printing from which the peeling member has been removed by the removing means, and applying the liquid with a predetermined wiping member Wiping means for wiping the offset master plate for offset printing, and reproducing the master master for offset printing into the master plate for offset printing. 4. A hydrophilic material which is swollen with water but does not disappear by swelling with water but which does not disappear on the surface of a sheet-like base material such as metal, paper, and polymer. An easily removable film is fixed as a surface layer, and an image is formed on the surface thereof by an electrophotographic image forming apparatus using a film-like image forming substance, and is used as a master for offset printing for a predetermined number of prints using oil-based ink. A method for regenerating an offset printing master, comprising: applying a predetermined peeling removal accelerating liquid to the offset printing master; and applying a predetermined peeling removal accelerating liquid to the offset printing master. While the image forming surface is in close contact with a predetermined peeling member, pressure is applied while heating to a predetermined temperature to transfer the image forming substance from the master master for offset printing to the peeling member. A removing process, a cleaning process for removing the image forming substance transferred to the peeling member from the peeling member, and reusing the image forming substance for reuse in the removing process, and the removing member in the removing process. A wiping treatment step of applying a liquid containing several percent of a lipophilic substance solubilizing agent to the offset printing master master from which the offset has been removed, and wiping the offset printing master master coated with the liquid using a predetermined wiping member. And reproducing the master plate for offset printing into the master plate for offset printing. 5. A surface layer having hydrophilicity is formed on the surface of a predetermined sheet-like substrate, and a solid component for removing an image-forming substance at room temperature by an electrophotographic image forming apparatus is formed on the surface of the surface layer. A method for regenerating an offset printing master, which is formed by an lipophilic image forming substance containing an image as an offset printing master and used for printing a predetermined number of sheets with oil-based ink, wherein the offset printing master is Removing the image forming surface from the master master for offset printing to transfer and remove the image forming substance from the master master for offset printing by heating the image forming surface while pressing the image forming surface of the master in close contact with a predetermined release member; A cleaning processing step of removing the image forming substance transferred to the peeling member from the peeling member and reusing the image forming substance for reuse in the removing processing step; A liquid containing several percent of a lipophilic substance solubilizing agent is applied to the offset printing master original from which the release member has been removed in the step, and the liquid printing master is applied with a predetermined wiping member. A wiping process step of wiping the master plate for offset printing to reproduce the master master for offset printing into the master for offset printing. 6. A film having a predetermined release property and a predetermined compatibility with an image forming substance is immobilized as a surface layer on a surface of a sheet-like base material such as metal, paper, and polymer. A method for reproducing a master master for offset printing, in which an image is formed with a film-shaped image forming substance in an electrophotographic image forming apparatus, and the master master for offset printing is used for printing a predetermined number of sheets with an aqueous ink, While the image forming surface of the offset printing master plate is in close contact with a roll-shaped peeling member fed from the feed side to the winding side, the image is pressed from the offset printing master plate while heating to a predetermined temperature. A removing treatment step of transferring and removing a forming substance to and from the peeling member; and a few percent lipophilic property in the offset printing master master from which the peeling member has been removed in the removing treatment step. Applying a liquid containing a substance solubilizer and wiping the offset printing master using a predetermined wiping member, and performing the offset printing of the offset printing master. A method for reproducing an offset printing original plate, which comprises reproducing the original plate for offset printing. 7. A hydrophilic material which is swelled with water but does not disappear by swelling with water and which does not disappear on the surface of a sheet-like base material such as a metal, paper, or a polymer, and which is mainly composed of a solid resin at room temperature in the air. Electrons are placed on the surface of an offset printing original plate on which an easily removable film is fixed as a surface layer, or on the surface of an offset printing original plate on which a hydrophilic surface layer is formed on the surface of a predetermined sheet-like substrate. A method for producing a master master for offset printing in which an image is formed with a film-like image forming substance in a photographic image forming apparatus, wherein a predetermined liquid is applied to a surface of the master master for offset printing. To create a master master for offset printing.