JP2009160934A - Hot stamping apparatus equipped with contracted ink arrangement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus which enables precise transfer of a printing image forming layer such as a metallized layer, for instance, in a more reliable and more economical manner, and enables simple handling thereof. <P>SOLUTION: For the purpose of transferring the printing image forming layer onto a printing sheet from a carrier film, an adhesive is applied on the printing sheet in conformity with a printing image part. In a hot stamping apparatus (2), subsequently, the carrier film having the printing image forming layer is pressed on the printing sheet. Thereby, the layer is adhered to an adhesive part and the printing image part is formed. In order to improve such function, to attain simplification of the apparatus and to enhance flexibility, an adhesive applying device is disposed variably by using a doctor device, in particular. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The invention relates to an apparatus for transferring a line-forming layer from a carrier film to a printed sheet as described in claim 1.

  It is known to create a metal layer on a printed sheet using a film transfer method. Patent Document 1 discloses a printing material and a printing apparatus using the printing material. Here, there is shown a sheet processing apparatus that includes one paper feeding device and one paper ejection device, and a plurality of printing devices and one foil pressing device arranged between the two devices. In at least one of the printing devices, the adhesive pattern is applied using a lithographic printing method. This adhesive pattern is applied by a non-heated printing method and has a specific image forming pattern. The foil stamping device following the printing device includes an impression cylinder and a press cylinder, and further includes a film guide. The film guide is made such that a ribbon-like film or transfer film is guided from a film stock roll through a transfer gap of a foil stamping device between the impression cylinder and the press cylinder. The ribbon-like film is wound up again after leaving the foil stamping device on the discharge side. The transfer film has a carrier layer, and an image forming layer such as a metal layer such as aluminum can be placed on the carrier layer. A separation layer is provided between the metal layer and the carrier film so that the metal layer can be peeled off from the carrier layer.

  When the printed sheet is conveyed through the printing apparatus, an adhesive pattern is attached to each printed sheet. The printed sheet is then transported through the foil stamping device, where the printed sheet placed on the impression cylinder is brought into contact with the film material by the press cylinder. At this time, the downwardly facing metal layer is pressed against the printed area of the printed sheet adhesive.

  As the printed sheet is further conveyed, the metal layer is bonded only to the area of the pattern printed with the adhesive. That is, the metal layer in the region of the adhesive pattern is peeled off from the carrier film. The transfer film used in this way is taken up again. The printed sheet is discharged in a pressed state.

  It is known to arrange such a foil stamping device in a printing device of a printing press, for example. Furthermore, it is known to use a rubber blanket cylinder or a printing blanket cylinder of a printing apparatus as the press cylinder.

  It is known to arrange so-called anilox inking devices in sheet-fed offset printers. This anilox inking device may be arranged in combination with a conventional doctor type inking device or a continuous inking device. Furthermore, offset printing machines with dry or wet offset operation are also known. The cylinder, the inking device, and the dampening device can be driven through one mechanical drive, and can be connected and disconnected.

  A varnish module can be placed before and after the printing device of the printing press. In addition, perforations, embossing, etc. can be incorporated into the printing press in an in-line manner. Also, in the machine configuration, one or more direction changing devices can be provided.

Such a high diversity of machine configurations should be maintained when transferring.
European Patent No. 0659520

  An object of the present invention is to provide an apparatus which can perform accurate transfer of an image forming layer such as a metallized layer more reliably and more economically and can be easily handled.

  The problem can be solved by an apparatus having the features of claim 1.

  Within the foil stamping device for transferring the image forming layer from the transfer film, the adhesive layer is prepared in a suitable manner by variously configurable attachment devices. Thereby, the apparatus can be applied to various different sheet processing machines. And in this invention, the prepared foil material is fully utilized.

  In particular, the attaching device can be provided with a shortening inking device comprising an anilox inking device.

  In the present invention, a film transfer device based on the cold film transfer principle is provided in a sheet rotary printing press such as a sheet offset printing press.

  A particular advantage of the present invention is that it can be easily and arbitrarily placed in a sheet processing machine in which the foil stamping device is housed. Thereby, in the case of a printing press equipped with a plurality of printing devices, it is possible to perform foil stamping or metallization layering to form a line before and after ink layer application and between ink layer application and ink layer application. It becomes possible. For this purpose, the attaching device and the foil stamping device of the present invention are preferably configured in the form of a module as a portable unit. Preferably, a plurality of foil stamping devices can also be arranged in succession in a single sheet processing machine. Thereby, various line-forming foils or metallization layers within one picture can be applied one after the other or in parallel. Further, the first adhesive pattern is attached using the first image forming foil or the metallized layer in the first foil stamping apparatus, and then, a further adhesive pattern including the first adhesive pattern is superimposed on the first adhesive pattern. It is also possible to apply further image-forming foil stampings or metallization layers thereto.

  The printing device used for this in the form of a foil stamping device is equipped with an adhesive application applicator configured as a printing device or varnish device. Such a printing device can be a conventional printing device in the form of an offset printing device or a relief printing device. Moreover, it can also be comprised as what is called an anilox printing apparatus. In that case, a shortening inking device using anilox roller technology is arranged in the printing device, and this shortening inking device is preferably used for adhesive application.

  In order to further reduce the set-up time, an ink supply device can be provided in particular in the application device. It is possible to introduce a cartridge system with a replaceable ink container or a fixed ink supply device already known for this purpose. Thereby, an adhesive or printing ink can be variably assigned to the attaching device.

  The film transfer device is followed by at least one printing device and possibly one or more varnish devices. Such a printing device can also be configured as an anilox printing device.

  In the printing machine, a plurality of direction changing devices can be provided between the printing device and the printing device. These direction changing devices can be placed in front of or behind the film transfer device.

  Furthermore, in-line processes such as embossing, grooving, slitting, perforation, ink jet printing or ink jet marking can be provided in the printing press.

  The printing machine can also be configured as a so-called off-line machine with only one application device with an anilox inking device for adhesive application and one foil stamping device.

  In all configurations, a film timing operation and format width web-like film or a plurality of narrow partial web-like films can be provided.

Such a configuration has the following advantages.
-High process stability can be obtained through multiple shortening ink devices-Loss of paper is reduced even when adhesive is applied-Shortening of setup time is achieved-High print quality without ghosting-Ink Uniform inking without dripping is possible. -Easy reproduction in inking and adhesive application -Spot color printing is possible by combining conventional inking devices -Possibility of correction and mistakes- Temperature effects can be used for registration and control

  Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a sheet processing machine, and in this figure, a printing machine composed of at least two printing apparatuses. These two printing devices are arranged for the following reasons.
-First, an adhesive pattern for forming an image line is applied to the printed sheet (applying device 1).
Thereafter, in the subsequent printing apparatus, the transfer film 5 is passed through the transfer gap 6 together with the printed sheet, and the transfer film 5 is pressed against the printed sheet in the transfer gap 6 (foil pressing apparatus). 2).

  The transfer gap 6 in the foil stamping device 2 is formed by the press cylinder 3 and the impression cylinder 4. These cylinders correspond to the printing blanket cylinder and the impression cylinder of the offset printing apparatus.

  Furthermore, a so-called calendar device can also be installed later. A web guide for the transfer film in the foil stamping device 2 used for film transfer is shown.

  The transfer film 5 is composed of a plurality of layers. The transfer film 5 includes one carrier layer, and an image forming layer is placed on the carrier layer by a separation layer. The separation layer is for easily separating the image forming layer from the carrier layer. The image-forming layer can be, for example, a metallized layer or a glitter layer or a textured layer or an inked layer or a layer comprising one or more image patterns.

  The film stock roll 8 is assigned to the foil stamping device 2 on the sheet supply side. The film stock roll 8 is provided with one rotation driving device 7. The rotation drive device 7 is necessary for continuously supplying the foil pressing device 2 while controlling the transfer film, and is therefore controllable. Further, a direction changing roller or a tension roller is provided in the film supply area. Thereby, the web-like film of the transfer film is always held with the same tension with respect to the press cylinder 3. A film collection roll 9 is shown on the discharge side of the printing apparatus. The used film material is wound around the film collection roll 9 again. For optimal production, it is also necessary to provide a controllable rotary drive 7 here. The transfer film 5 can also essentially be moved on the discharge side using a rotary drive 7 and tensioned by a brake device on the supply side.

  For example, the step of transferring the image forming layer such as a metallized layer onto the printing paper is performed in the transfer gap 6 between the press cylinder 3 and the impression cylinder. The press cylinder 3 can also be a printing blanket cylinder of an offset printing apparatus. The press cylinder 3 can also be a plate cylinder of a varnish module. What is important here is that the surface of the printing blanket cylinder or plate cylinder, ie the press cylinder 3, is covered with a compressible and cushioning element.

  The press drum 3 can be provided with a press tension material as a plastic cover such as a rubber blanket or a printing blanket. The press tensioning material is held in the cylinder gap by an attachment device. The press tensioning material is configured with appropriate elasticity in order to improve the transfer characteristics in the transfer gap 6. This elasticity can be applied in the compressible intermediate layer in some cases. This compressibility is desirably equal to or less than conventional rubber blankets or printing blankets that can also be placed in this position.

  Said compressibility is obtained by a conventional compressible printing blanket. Furthermore, it is also possible to arrange a tensioning material combining a hard printing blanket and a soft lower layer.

  In the printing apparatus 50 subsequent to the foil stamping apparatus 2, color printing is further performed on a printed sheet having a metallized layer in line with the image line portion. At this time, the printed sheet coming out of the foil stamping device 2 is transferred by the impression cylinder 4 to the impression cylinder 40 of the printing apparatus 50 via the sheet conveyance cylinder or the sheet conveyance unit.

  The printing apparatus 50 includes a pressure cylinder 40, a rubber blanket cylinder or printing blanket cylinder 41 assigned to the impression cylinder 40, and a plate assigned to the rubber blanket cylinder or printing blanket cylinder 41 in the same manner as a normal offset printing apparatus. A trunk 43 is provided. In the drawing, an inking device and a dampening device assigned to the plate cylinder 43 are shown.

  A further printing gap 60 is formed between the impression cylinder 40 and the printing blanket cylinder 41. In the printing gap 60, printing ink is applied on the printed sheet from a printing plate 44 mounted on the plate cylinder 43 through a cover 42 arranged on the printing blanket cylinder 41.

  In the press gap 60, a substantially linear pressure is applied to the printed sheet, which also extends to the image portion of the metallization layer. At this time, the pressure in the press gap 60 is adjusted according to the pressure applied to the transfer gap 6.

  The shortening ink device shown in the foil stamping device 2 is provided for transferring printing ink or varnish from the chamber doctor blade 61 through the anilox roller 62 to the inking roller 63 of the size of a cylinder. It is what has been. The inking roller 63 cooperates with the plate cylinder 12. In the case of this figure, since film transfer is performed in the foil stamping apparatus 2, ink supply is not functioning.

  Such a shortening inking device can also be provided in a printing device or a varnish device that is placed behind the attaching device 1 or the foil stamping device 2. Then, the desired action of the shortening inking device technology can be applied at these functional positions.

  In order to ensure the economics of the foil stamping method, the film feed of the transfer film from the film stock roll 8 to the transfer gap 6 and to the film recovery roll 9 can be controlled, and no image forming layer transfer is performed. In this case, the transfer film 5 is stopped as much as possible.

  In a further embodiment, a contoured press surface can be provided as the surface of the press cylinder 3. For this purpose, not the entire plastic layer but a press surface limited to the area to be pressed is set on the press cylinder 3. This can be achieved, for example, by using a cut printing blanket, an imageable plastic printing plate, or a pressing segment that is preferably removably mounted on a smooth lower layer, possibly stickable or magnetized. The surface to be pressed can be limited by using the mounted one.

  Further improvements in film use as described above are obtained by dividing the transfer film 5 into narrower one or more partial web-like films. Thereby, appropriate control is made using one or more devices for timing the film feed of each partial web-like film, in a foil stamping region having different lengths for each zone within a single sheet. Also, the use of the transfer film 5 is improved. In order to improve the shine effect, the image-forming layer, e.g. a metallized layer, can be applied using an ultraviolet reactive adhesive. At this time, so-called UV ground color ink can be applied. This UV ground color ink is applied via an offset printing plate in an appropriate manner by the adhesive application device 1. Since it is necessary to provide an appropriate roller in the attaching device 1 for the process of applying an adhesive, and it is necessary to arrange a UV drying device immediately after the attaching device 1 or the foil pressing device 2, the cost of the machine is reduced. Slightly rises. However, the adhesive effect of the UV ground color ink is somewhat higher than that of a normal adhesive. Therefore, the smoothness is improved, thereby improving the shine effect of the image forming layer on the printed sheet.

  In order to carry out the UV technology, a UV dryer 16 is attached to the apparatus 1 in order to dry the adhesive application portion, or the image forming layer is transferred after the image forming layer is transferred in the foil stamping device 2. For example, the UV dryer 16 penetrating can be disposed on the impression cylinder 4 of the foil stamping device 2. As a result, the adhesive effect of the UV ground color ink can be fully utilized, and the smoothness of the foil pressing is also increased.

  The adhesive media required in transferring the image forming layer or metallization layer may require different consistency and different processing criteria, as described above.

Therefore, the adhesive application for taking in the image forming layer or the metallized layer from the transfer film can be performed using various units.
-Available here are anilox inking devices which can be arranged without a dampening device.
-Furthermore, the adhesive can be applied by dry offset or waterless offset printing. At this time, a conventional inking device can be used.
-Furthermore, the adhesive can be applied in cooperation with the chamber doctor via an anilox roller. This can be done by varnishing in the printing device.

  Below, some examples for carrying out the adhesive application based on the above-mentioned variations are given.

  Each of the methods described above is carried out using a relief printing plate, widely known today in flexographic printing or varnishing in a printing press. Thereby, the adhesive layer can be applied in a simple manner.

  The foil stamping device 2 is essentially suitable for applying a line-forming layer such as a metallized layer to a printed sheet prior to printing. In a sheet processing machine that houses the foil stamping device 2, the foil stamping device 2 can be placed anywhere else in the machine. Thereby, a desired line-forming layer, for example a metallization layer, can be applied before and after printing with printing ink and between printing with printing ink and printing with printing ink.

  For this purpose, the foil stamping module is preferably configured as a portable unit. The foil pressing module is composed of a frame provided with a film feeding device and a film winding device. In order to connect to each printing device used as the foil stamping device 2, the frame is provided with a connecting surface for connecting to a predetermined area of the necessary printing device. The surface corresponding to this is usually provided on the upper side of the necessary printing apparatus. The connecting surface can also be provided on the side surface or the front surface of the printing apparatus.

  The printing apparatus necessary as the attaching apparatus 1 for attaching an adhesive needs to be set in the same manner as a printing apparatus used as a standard only for attaching an adhesive (corresponding to normal inking).

  The equipment for the transfer film required for the film guide, near the film stock roll or film collection roll, is attached to the foil stamping module. An inlet for supplying the transfer film 5 to the press cylinder 3 or an outlet for recovering the transfer film 5 from the press cylinder 3 is provided only in the printing device protection part region. The redirection device required here for the transfer film can be attached to the protective part in a simple manner and can be removable in some cases.

  Corresponding to the above-described embodiment, it is possible to continuously provide a plurality of foil pressing devices 2 in one sheet processing machine. That is, various transfer films necessary for applying various image forming layers or metallization layers in the pattern can be successively supplied to the printed sheet. At this time, first, only one adhesive pattern including all necessary image patterns for the image forming layer is applied in the applying device 1, and then in the subsequent plurality of foil stamping devices 2. It is possible to transfer various film images one after another.

  Of course, it is also possible to transfer the first adhesive pattern in the first application device 1 and apply the first type of metallization layer in the first foil stamping device 2. In the subsequent application device 1, a further first adhesive pattern or an overlying adhesive pattern can be applied so as to overlay it, and a second type of metallization layer can be applied in the second foil stamping device 2. . In this way, for example, an image pattern in which a silver layer and a gold layer are intricate can be produced in one foil pressing step.

  FIG. 2 shows an alternative configuration of printing device 80 with a further configuration of shortening inking device.

  This printing device or inking device 79 can be assigned to the foil stamping module 2 as an ink printing device or in the application device 1. The shortening ink device 79 is provided with an anilox roller 70. A plate cylinder 71, a rubber blanket cylinder 72, and an impression cylinder 73 are assigned to the anilox roller 70 in the printing apparatus 80. The plate cylinder 71 is further provided with a dampening device 78 as the case may be in order to wet the printing plate in a wet offset.

  The shortening ink device 70 includes an anilox roller 70 and a roll doctor 74. The roll doctor 74 is assigned with a coater blade 81 connected to the ink supply device 75 in the anilox roller 70. Thereby, the printing ink or the adhesive is applied onto the anilox roller 70 using the coater blade 81 via the ink supply device 75. The printing ink or adhesive is put into the cup-shaped recess structure of the anilox roller 70 by the roll doctor 74. Thereafter, an ink layer or an adhesive layer on the anilox roller 70 is leveled by the calender roller 76 for uniformization again. In order to maintain the function of the calendar roller 76, a cleaning doctor 77 for removing an excessive amount of printing ink or adhesive is assigned to the calendar roller 76.

  The shortening ink device 79 shown here is particularly well suited to the liquid to be processed due to its compact structure and short transfer path, and always produces a printing ink layer or adhesive layer of constant quality. This can be applied continuously to any kind of printing plate. Thereby, it is possible to perform adhesive metering that can be carried out very well and uniformly even in cold film transfer.

  According to the embodiment of the present document, different types of foils can be transferred from the transfer film 5 to different substrates by a transfer method. The detailed configuration of the present invention is not limited to the possibilities described herein, and can be further interpreted within the scope of the ability of those skilled in the art.

It is a basic view of a printing machine provided with a film transfer apparatus. It is a figure of a printing apparatus provided with a shortening ink apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Attachment apparatus 2 Foil stamping apparatus 3 Press cylinder 4 Impression cylinder 5 Transfer film / web-like film 6 Transfer gap 7 Rotation drive apparatus 8 Film stock roll 9 Film collection roll 10 Press tension material 11 Cylinder gap 12 Plate cylinder 13 Rubber blanket cylinder 14 Guide roller 15 Printer Protection Unit 16 UV Dryer 17 Monitoring System 18 Dancer Roller 19-
20 guide roller 40 impression cylinder 41 printing blanket cylinder 42 printing blanket / rubber blanket 43 plate cylinder 44 printing plate 50 printing device 60 printing gap 61 doctor blade 62 anilox roller 63 inking roller 70 anilox roller 71 plate cylinder 72 rubber cylinder 73 impression cylinder 74 Roll Doctor 75 Ink Supply Device 76 Calendar Roller 77 Cleaning Doctor 78 Dampening Water Device 79 Shortening Ink Device 80 Printing Device 81 Coater Blade

Claims (10)

At least one attaching device (1) for attaching an adhesive suitable for the image line portion to the printed sheet and a foil pressing device (2 for transferring the image forming layer from the carrier film (5) to the printed sheet. ) For transferring the image forming layer from the carrier film (5) to the printed sheet, wherein the foil stamping device (2) comprises an impression cylinder (4) and a press roller (3). A common transfer gap (6) is formed by the impression cylinder (4) and the press roller (3), and the carrier film (5) is guided around the press roller (3). At this time, the carrier film (5) is pressed with the foil layer side superimposed on the printed sheet carried on the impression cylinder (4), and the printed sheet and Together of the transfer gap (6) between the press roller (3) and the impression cylinder (4) When the printing sheet is discharged from the transfer gap (6), the image line forming layer is bonded to the printing sheet in an area corresponding to the image line portion in the adhesive application area. In the apparatus for transferring the image forming layer from the carrier film (5) to the printing sheet, which is peeled off from the carrier film (5),
A device characterized in that the attaching device (1) is provided with an adhesive supply device provided with an adhesive container combined with a doctor device.   The device according to claim 1, wherein the doctor device is configured as a chamber doctor.   The apparatus according to claim 1, characterized in that the doctor device is configured as an open ink container / adhesive container with a coater blade in contact with the anilox roller.   The doctor device is configured as an open ink container / adhesive container with a coater blade in contact with an anilox roller connected to a post-roll doctor. The apparatus according to 1.   The apparatus according to claim 1, wherein an anilox roller for adhesive transfer and / or adhesive application is assigned to the chamber doctor.   6. The device according to claim 1, wherein the adhesive supply device is assigned to a plate cylinder (12) of an offset printing device.   6. The device according to claim 1, wherein the adhesive supply device is assigned to a plate cylinder (3) of a varnish module of a printing press.   8. An apparatus according to claim 1, wherein the adhesive supply device comprises an adhesive dispenser with a cartridge system or a fixed ink delivery device. At least one attaching device (1) for attaching an adhesive suitable for the image line portion to the printed sheet and a foil pressing device (2 for transferring the image forming layer from the carrier film (5) to the printed sheet. ) For transferring the image forming layer from the carrier film (5) to the printed sheet, the foil stamping device (2) comprising an impression cylinder (4) and a press roller (3). A common transfer gap (6) is formed by the pressure drum (4) and the press roller (3), and the carrier film (5) is guided around the press roller (3). At this time, the carrier film (5) is pressed with the foil layer side superimposed on the printed sheet transported on the impression cylinder (4), and together with the printed sheet. In between the transfer gap (6) between the press roller (3) and the impression cylinder (4) Then, when the printed sheet is discharged from the transfer gap (6), the image forming layer is bonded to the printed sheet at a region corresponding to the image line portion in the adhesive application region. In the apparatus for transferring the image forming layer peeled off from the carrier film (5) from the carrier film (5) to the printing sheet,
The attaching device (1) comprises an adhesive supply device configured as an anilox inking device (61, 62, 63), and a lithographic printing plate on the plate cylinder (12) to create an adhesive pattern A device characterized in that is attached. At least one attaching device (1) for attaching an adhesive suitable for the image line portion to the printed sheet and a foil pressing device (2 for transferring the image forming layer from the carrier film (5) to the printed sheet. ) For transferring the image forming layer from the carrier film (5) to the printed sheet, wherein the foil stamping device (2) comprises an impression cylinder (4) and a press roller (3). A common transfer gap (6) is formed by the external pressure drum (4) and the press roller (3), and the carrier film (5) is guided around the press roller (3). At this time, the carrier film (5) is pressed with the foil layer side superimposed on the printed sheet transported on the impression cylinder (4), and together with the printed sheet. Between the press roller (3) and the impression cylinder (4). When the printed sheet is discharged from the transfer gap (6), the image forming layer is formed by adhering a region corresponding to the image line in the adhesive application region to the printed sheet. In the apparatus for transferring the image forming layer peeled off from the carrier film (5) from the carrier film (5) to the printing sheet,
The attaching device (1) includes an adhesive supply device implemented based on a waterless offset printing method, and supplies dampening water on the plate cylinder (12) to create an adhesive pattern. A device characterized in that a printing plate is attached.

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