JP2000352908A - Non-fixing type image forming method and non-fixing type image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-fixing type image forming method by which an image can be formed by making a toner image held so that it can be separated and removed from an image receiving sheet without fixing the toner image onto the image receiving sheet and also toner or the image receiving sheet can be reused from the image receiving sheet on which the toner image is formed, and an image forming device of a non-fixing system suitable for the execution of a method thereof. SOLUTION: On the image receiving sheet S having an uneven surface s2' on which many recessed parts s21 to receive the toner are formed, the toner image is formed by sticking the toner T removably to the recessed part s21 of an image receiving sheet uneven surface s2', and the toner T stuck to the recessed part s21 is protected by the projected part s22 of the image receiving sheet uneven surface s2', so that a formed image is obtained by a stuck toner image. The toner stuck to the projected part s22 is removed by a projected part toner removing device. As for the toner image forming image receiving sheet S of a reuse object, the toner is separated and removed from the image receiving sheet, and the image receiving sheet after removing the toner or the toner removed is provided for reuse.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a non-fixing type image forming method for forming a toner image on an image receiving sheet and a non-fixing type image forming apparatus used for carrying out the image forming method.

[0002]

2. Description of the Related Art An image forming method for forming a toner image on an image receiving sheet has been practiced for a long time. A typical one is an electrophotographic image forming method. In electrophotographic image formation, an electrostatic latent image carrier such as a photoconductor is charged to a predetermined potential, and the charged area is exposed to an image according to document image information to form an electrostatic latent image. The electrostatic latent image is developed using a developer to form a visible toner image. Further, the visible toner image is finally transferred to an image receiving sheet and fixed.

In addition to the above, without forming an electrostatic latent image,
Based on the original image information, the toner is directly adhered to the image receiving sheet to form a toner image and fixed, or in the same manner, once the toner image is directly formed on the intermediate transfer body, and then transferred to the image receiving sheet, An image forming method of a direct recording system for fixing is also proposed. In any case, in such a conventional image forming method, a developer containing a toner that can be fixed to an image receiving sheet is used. As a representative example of such a developer, a developer containing a heat-fusible toner in which a pigment or a dye is mixed and dispersed in a thermoplastic resin can be exemplified.

A toner image composed of such a heat-meltable toner is finally fixed on an image-receiving sheet made of paper, plastic, or the like by heating with a heat roller, infrared rays, or the like. At this time, the material is heated under pressure if necessary.
In any case, it is difficult to separate the toner fixed on the image receiving sheet from the image receiving sheet, and it is difficult to reuse the toner and the image receiving sheet. Therefore, at present, the image receiving sheet on which the toner image is fixed is discarded when it becomes unnecessary.

[0005]

However, with today's information society, such toners and image receiving sheets are consumed in a large amount, and the energy required for the production and the amount of carbon dioxide emitted by the production increase. is there. As a method of separating the toner from the transfer paper to reuse the transfer paper on which the toner image is fixed, a deinking method using an aqueous solution such as a surfactant is also known. Requires a large amount of energy, and the removed toner cannot be reused because it is melted and solidified.

Accordingly, the present invention relates to an image forming method for forming a toner image on an image receiving sheet, and it is possible to separate and remove the toner image from the image receiving sheet without fixing the toner image to the image receiving sheet as in the related art. It is an object of the present invention to provide a non-fixing type image forming method capable of forming an image while holding the toner image in such a manner, whereby the toner or the image receiving sheet can be reused from the image receiving sheet on which the toner image is formed. And

Another object of the present invention is to provide a non-fixing type image forming apparatus suitable for carrying out the non-fixing type image forming method according to the present invention.

[0008]

The present invention is based on the following idea of the present inventor. That is, in the current hard copy method, the largest energy consumption factor is in the step of fixing the toner image to a transfer sheet such as transfer paper. If this fixing step is not necessary, the energy consumption should be greatly reduced. It is. In addition, if the used transfer sheet and the like can be reused, the energy saving and the resource saving effect are still large.

[0009] In daily life and office work, there are many pencil-written documents and drawings. This pencil image is made of shavings produced by rubbing a mixture of carbon and clay constituting the pencil lead against the paper surface, and is formed and held without any special fixing agent or fixing step. Moreover, since the shavings of the pencil lead are embedded in the concave and convex portions of the paper surface, they cannot be removed by light contact. However, it can be easily removed with an eraser.

As described above, the toner image is held on the image receiving sheet unless a special external force is applied thereto, even if the toner image is not completely fixed to the image receiving sheet. If desired, the toner is separated from the image receiving sheet. Therefore, there is a method that can reuse the image receiving sheet and toner. The inventor of the present invention has repeated studies based on such an idea, and has obtained the following findings.

That is, an image receiving sheet having an uneven surface formed with a large number of recesses capable of receiving toner may be used as the image receiving sheet. A toner image can be formed by attaching the toner removably to the concave portion of the uneven surface of the image receiving sheet. The toner adhering to the concave portions of the concave and convex surface of the image receiving sheet may be protected from external force by the convex portions of the concave and convex surface. As a result, even if the toner image is not subjected to the fixing process as in the related art, it can be maintained as a toner image unless a special toner removing action is applied. As for the toner adhering to the convex portions of the concave and convex surface of the image receiving sheet, the toner may be adhered to the concave portions of the concave and convex surface of the image receiving sheet and then the convex toner may be intensively removed. When the toner or (and) the image receiving sheet is to be reused with respect to the image receiving sheet on which the toner image has been formed, it is only necessary to separate and remove the toner that has only been removably attached from the image receiving sheet.

Based on the above findings, the present invention provides the following image forming method and image forming apparatus. (1) Image forming method This is an image forming method for forming a toner image on an image receiving sheet.
As the image receiving sheet, an image receiving sheet having a concave and convex surface formed with a large number of concave portions capable of receiving toner is adopted, and toner is removably attached to the concave portion of the concave and convex surface of the image receiving sheet to form a toner image. At the time of image formation, the toner adhering to the protrusions on the uneven surface of the image receiving sheet is brought into contact with or close to the protrusion cleaning rotator in which a local electrostatic field of a fine pattern and / or a local static magnetic field are dispersedly formed on the surface. The toner adhering to the concave portion is protected by the convex portion of the concave and convex surface of the image receiving sheet, and the formed toner image is used as a formed image. Image forming method.

According to the non-fixing type image forming method of the present invention, an image receiving sheet having a concave and convex surface formed with a large number of concave portions capable of receiving toner is used as an image receiving sheet for forming an image.
A toner image is formed by removably attaching toner to the concave portion of the concave and convex surface of the image receiving sheet. Then, the toner adhering to the concave portion is protected by the convex portion of the concave and convex surface of the image receiving sheet. Regarding the toner adhered to the convex portion of the concave and convex surface of the image receiving sheet at the time of forming the toner image, the local electrostatic field and / or the local pattern of the fine pattern depend on whether the toner used is a chargeable toner or a chargeable magnetic toner. A convex cleaning rotary member having a static magnetic field dispersed on the surface thereof is brought into contact with or close to the convex portion to be adsorbed and removed on the cleaning rotary member.

The toner image formed on the image receiving sheet is protected by the convex portions of the concave and convex surface of the image receiving sheet although the fixing process by heating or the like as in the conventional image forming method is not performed just by attaching the toner image. Therefore, as long as no special external force is applied, the required state of the toner image can be maintained. Significant disturbance of the toner image due to slight external force such as contact between the image receiving sheets in the case of viewing the toner image on the image receiving sheet, storing the image receiving sheet, or simply moving the image receiving sheet, or light finger contact with the image receiving sheet Inconveniences such as adhesion of toner to the back surface of the image receiving sheet superposed thereon do not occur.

Further, since the toner on the image receiving sheet is only removably adhered, the toner can be separated from the image receiving sheet, and the toner separated and removed in this way or the image receiving sheet after the toner removal is reused. Available. Also,
According to the non-fixing type image forming method according to the present invention, it is not necessary to use a toner that can be fixed, for example, a heat-fusible toner that can be fixed by heating. Therefore, a hard material can be used as the toner material, whereby a long-life toner with less deformation, abrasion, fusion and the like can be employed.

In the non-fixing type image forming method according to the present invention, toner image formation on an image receiving sheet can be carried out by a conventional electrophotographic method involving the formation of an electrostatic latent image, a direct recording method described above, or the like. . In any case, a case in which a chargeable toner or a chargeable magnetic toner is used as the toner, and the toner is formed on the image receiving sheet by electrostatic force when the toner image is formed on the concave and convex surface of the image receiving sheet can be exemplified. .

When the chargeable toner is used, the toner can be separated and removed by using an electrostatic force when the toner is separated and removed from the image receiving sheet for reuse of a sheet or the like. In addition, when the chargeable magnetic toner is used, the toner can be separated and removed from the image receiving sheet more easily and reliably by using the electrostatic force and the magnetic force. The cleaning of the toner adhered to the projections of the uneven surface of the image receiving sheet during the formation of the toner image on the image receiving sheet will be further described.For example, a chargeable toner is used as the toner, and when forming the toner image on the image receiving sheet, the toner is used. When electrostatically adhering to the concave portion of the image receiving sheet uneven surface, the convex cleaning rotator serves as a fine pattern having a polarity opposite to the charging polarity of the toner adhered to the convex portion of the image receiving sheet uneven surface when forming the toner image. , A convex cleaning rotating body in which the local electrostatic field is dispersedly formed on the surface.

When a chargeable magnetic toner is used as the toner and the toner is applied to the concave portion of the concave and convex surface of the image receiving sheet by electrostatic force when forming a toner image on the image receiving sheet, the convex cleaning rotary member is used. For example, a convex cleaning rotating body in which a local static magnetic field of a fine pattern is dispersedly formed on the surface can be used. In addition, even when the chargeable magnetic toner is used, a convex cleaning rotator in which a local electrostatic field of a fine pattern having a polarity opposite to the charge polarity of the toner adhered to the convex portion of the concave and convex surface of the image receiving sheet is dispersed and formed on the surface is used. You may. Further, a projection cleaning rotator in which both the local electrostatic field of the fine pattern and the local static magnetic field of the fine pattern are dispersed may be used.

If the local electrostatic field or the local static magnetic field is too large, the toner in the concave portion on the concave and convex surface of the image receiving sheet will also be adsorbed. The fine pattern may be formed in a size and pattern in which the toner of the convex portion of the concave and convex surface of the image receiving sheet is adsorbed, but the toner of the concave portion is not adsorbed, or the toner is hardly adsorbed in consideration of the toner adsorbing force of the electric field and the magnetic field. .

The pattern of such a local electrostatic field or static magnetic field is formed of stripes, halftone dots, etc., which are composed of parallel streaks, in particular, parallel streaks, particularly, closely arranged halftone dots, etc. It may be in any shape such as a dotted shape. In any case, as a form of the convex cleaning body,
A convex cleaning roller and a convex cleaning endless rotating belt can be exemplified. (2) Image forming apparatus The following image forming apparatuses. Toner image forming apparatus for forming a toner image on an image receiving sheet by forming a toner image on the image receiving sheet by forming a toner image on the image receiving sheet having a concave and convex surface having a large number of concave portions capable of receiving toner used for forming a toner image. And a convex toner removing device that is provided downstream from the toner image forming area on the image receiving sheet by the toner image forming apparatus in the image receiving sheet transport direction and removes toner attached to the convex portion of the image receiving sheet uneven surface. The convex portion toner removing device is disposed so as to contact or approach the convex portion of the concave and convex surface of the image receiving sheet sent from the toner image forming area, and the local electrostatic field forming portion is provided on the surface. A formed projection cleaning rotator,
A charging device that disperses and forms a local electrostatic field of a fine pattern that electrostatically attracts the toner of the convex portion of the image receiving sheet onto the surface of the convex cleaning rotator by charging the local electrostatic field forming portion of the convex cleaning rotator. An image forming apparatus comprising:

In the above-described convex toner removing device, the convex cleaning rotary member has a local electrostatic field forming portion of a fine pattern made of a chargeable insulating material dispersed and formed on the surface as the local electrostatic field forming portion, for example. In this case, the charging device may be a charging device that uniformly charges each of the local electrostatic field forming units. In this case, as a more specific example of the protrusion cleaning rotator, having a conductive surface layer,
In the conductive surface layer, a) stripes consisting of parallel streaks and the like, especially parallel streaks and the like, and b) halftone dots and the like particularly consisting of halftone dots and the like arranged in parallel and closely arranged. A rotating body in which concave portions dispersed and formed in a scattered manner or the like are filled with a chargeable insulating material (for example, a chargeable insulating synthetic resin) can be given. In the case where such a convex cleaning rotary member is employed, various charging devices such as a corona charger can be employed as the charging device as long as the charging insulating material in each concave portion of the rotary member surface layer can be uniformly charged. .

As a further specific example of such a convex cleaning member, a conductive surface layer having a width of about 10 μm to 20 μm, a depth of about 5 μm to 20 μm, and an interval between adjacent ones of 2 μm is provided. ~ 20μm stripes consisting of parallel grooves arranged in close proximity, similar width, depth,
Chargeable insulating material, for example, a chargeable insulating synthetic resin, and more specifically, for example, an acrylic resin, a polyester resin, an epoxy resin, etc. A rotating body in which an insulating resin is embedded can be given.

The convex cleaning rotator includes, for example, a coating surface layer (for example, about 5 μm to 20 μm in thickness) made of a chargeable insulating material (for example, a chargeable insulating synthetic resin) as the local electrostatic field forming portion. The charging device may be a charging device that locally disperses and charges the surface of the rotating body to disperse and form a local electrostatic field of a fine pattern.

In the case of employing the convex cleaning rotating body, the charging device may be configured such that a surface layer of the rotating body is locally dispersed and charged so that a local electrostatic field of a fine pattern can be dispersedly formed. Examples thereof include a roller made of a charging roller having irregularities, and a roller made of a conductive brush. Further, a charging device including a conductive brush or a charging blade and applying an AC voltage thereto may be employed.

As a local electrostatic field of a fine pattern formed by the charging device, a stripe pattern composed of a myoelectric field and the like arranged in parallel and closely arranged with a width of about 10 μm to 20 μm and an interval between adjacent ones of about 2 μm to 20 μm, Alternatively, an electric field dispersed and formed in the form of a scattered dot composed of halftone electric fields and the like having the same width and the same interval can be exemplified. In any case, if the local electrostatic field is too large, the toner in the concave portion of the concave and convex surface of the image receiving sheet will also be adsorbed. Therefore, a combination of a convex cleaning rotary member and a charging device for obtaining a fine pattern electrostatic field is employed. . The fine pattern may be formed in a size and pattern in which the toner of the convex portion of the concave and convex surface of the image receiving sheet is adsorbed but the toner of the concave portion is not adsorbed or hardly adsorbed in consideration of the toner adsorbing force of the electric field.

In any case, examples of the form of the protrusion cleaning rotary member include a protrusion cleaning roller and a protrusion cleaning endless rotating belt. Toner image forming apparatus for forming a toner image on an image receiving sheet by forming a toner image on the image receiving sheet by forming a toner image on the image receiving sheet having a concave and convex surface having a large number of concave portions capable of receiving toner used for forming a toner image. And a convex toner removing device that is provided downstream from the toner image forming area on the image receiving sheet by the toner image forming apparatus in the image receiving sheet transport direction and removes toner attached to the convex portion of the image receiving sheet uneven surface. The convex portion toner removing device is disposed so as to contact or approach the convex portion of the uneven surface of the image receiving sheet sent from the toner image forming area, and the local static magnetic field of the fine pattern is applied to the surface. An image forming apparatus comprising: a projection cleaning rotator formed in a dispersed manner.

In the image forming apparatus, the convex cleaning rotator includes, for example, a ferromagnetic material magnetized in a recess formed on the surface of the rotator and a local static magnetic field of a fine pattern applied to the surface. Dispersion-formed, for example, formed on the roller surface, a) stripes composed of parallel grooves and the like, particularly parallel and closely arranged stripes and the like,
b) a rotating body or a ferromagnetic body in which a magnetized ferromagnetic material is embedded in recesses formed of halftone dots and the like, particularly dispersedly formed in the form of dashes formed of halftone dots and the like arranged in close proximity to each other; A material having a coating surface layer made of a material, in which a local static magnetic field of a fine pattern is dispersedly formed by local magnetization of the surface layer, for example, a) parallel stripes and the like, particularly arranged in parallel close proximity A rotating body in which a local static magnetic field of a fine pattern is dispersed and formed in a striped shape composed of stripes or the like, b) a dotted shape composed of halftone dots or the like, particularly a dotted shape composed of halftone dots arranged in close proximity. .

As a more specific example of such a rotating member for cleaning a convex portion, a stripe having a width of 10 .mu.m to 20 .mu.m, adjacent stripes having a spacing of about 2 .mu.m to 20 .mu.m, and similar stripes, similar widths and intervals. And a rotating body having a local static magnetic field dispersed and formed in a scattered dot shape composed of halftone dots and the like arranged close to each other. In any case, if the local static magnetic field is too large, the toner in the concave portion on the concave and convex surface of the image receiving sheet will also be adsorbed. The fine pattern may have a size and a pattern in which the magnetic toner of the convex portion of the concave and convex surface of the image receiving sheet is adsorbed, but the magnetic toner of the concave portion is not adsorbed or hardly adsorbed in consideration of the toner adsorbing force of the magnetic field. .

In any case, examples of the form of the convex cleaning roller include a convex cleaning roller and a convex cleaning endless rotating belt. The protrusion cleaning rotator may generate both a local electrostatic field of the fine pattern and a local static magnetic field of the fine pattern.

In any of the image forming apparatuses according to the present invention, an image can be formed on an image receiving sheet by performing the non-fixing type image forming method of the present invention in the toner image forming apparatus. Further, in the portion of the convex toner removing device, the toner attached to the convex portion of the concave and convex surface of the image receiving sheet at the time of forming the toner image can be removed from the convex portion. In any of the image forming apparatuses according to the present invention, the image receiving apparatus is provided upstream of a toner image forming area on the image receiving sheet by the toner image forming apparatus in a conveying direction of the image receiving sheet and is conveyed to the toner image forming area. A toner separation and removal device for separating and removing the toner from the sheet may be provided.

By providing this toner separation and removal device,
If the image receiving sheet conveyed to the toner image forming area on the image receiving sheet by the toner image forming apparatus has a toner image formed thereon, the toner is separated and removed before entering the area. The toner can be separated and removed by the apparatus, and a toner image can be formed again on the image receiving sheet after the removal of the toner. The separated toner can be reused if desired. Thus, the image receiving sheet and the toner can be recycled.

Further, the image forming apparatus according to the present invention may include a device for supplying the separated and removed toner from the toner separation and removal device to the toner image forming device. In this case, when the toner image forming apparatus includes a developing device, the toner can be supplied to the developing device.
When the toner image forming device includes a developing device, the developing device may also serve as at least a part of the toner separation and removal device.

Further, the image forming apparatus according to the present invention may include a device for supplying the toner removed by the convex toner removing device from the convex toner removing device to the toner image forming device. In this case, when the toner image forming apparatus includes a developing device, the toner can be supplied to the developing device. In any of the image forming apparatuses according to the present invention, the toner image forming apparatus can employ various types.

For example, a toner image forming apparatus which attaches the toner to the concave portion of the concave and convex surface of the image receiving sheet by electrostatic force in order to attach the toner to the concave portion can be used. The toner image forming apparatus further includes, for example, a portion that forms a toner image according to document image information on an image carrier, and a transfer device that electrostatically transfers the toner image onto the image receiving sheet. Can be exemplified.

Further, in this case, as a portion for forming a toner image corresponding to the document image information on the image carrier, an electrostatic latent image carrier and a static image corresponding to the document image information on the electrostatic latent image carrier are provided. A device that forms an electrostatic latent image and a developing device that develops the electrostatic latent image into a toner image, without forming an electrostatic latent image on an image carrier according to document image information An apparatus of a direct recording type in which a toner image is formed by directly electrostatically adhering toner to a toner image can be exemplified.

Incidentally, as the toner image forming apparatus, without using such an image carrier and without forming an electrostatic latent image,
A direct recording type toner image forming apparatus that forms a toner image by directly electrostatically adhering toner onto an image receiving sheet may be employed. The following can be exemplified as the toner separation and removal device. In separating and removing the toner from the image receiving sheet conveyed to the toner image forming area, separating and removing the toner by electrostatic force.In separating and removing the toner from the image receiving sheet conveyed to the toner image forming area, An electrostatic force and a magnetic force for separating and removing the toner; and for separating and removing the toner from the image receiving sheet conveyed to the toner image forming area, an alternating bias (in other words, an oscillation bias) (for example, an AC bias) is applied to the electrostatic force. ) Are superimposed.

The image receiving sheet used in the non-fixing type image forming method and the image forming apparatus according to the present invention is an image receiving sheet for forming a toner image by attaching a toner in a removable manner, and can receive the toner. It has a concave and convex surface formed with a large number of concave portions, and the toner can be formed in such a manner that the toner is removably adhered to the concave portion, and the toner adhered to the concave portion can be protected by the convex portion of the concave and convex surface of the image receiving sheet. It is an image receiving sheet.

The image receiving sheet can be formed of various materials such as paper, synthetic resin, and a combination thereof. On the uneven surface of the image receiving sheet, the concave portions and the convex portions are substantially uniformly dispersed and formed, and the total area occupied by the concave portions on the uneven surface is larger than the total area occupied by the convex portions, and each concave portion is smaller than the toner size. Examples that can be deep and wide and that can receive a plurality of toners inside can be exemplified.

An example in which irregularities are regularly formed can also be exemplified. The following is generally desirable for the image receiving sheet according to the present invention. The image receiving sheet has such a small size that unevenness on the surface does not significantly impair the image quality of the formed toner image. The size, shape, and strength, including the width and height of the projection, must be sufficient to protect the toner attached to the recess from external force. The shape and size of the irregularities do not hinder the separation and removal of the toner from the image receiving sheet.
In the form of parallel grooves with raised walls on both sides,
Each independently, for example, a square shape (for example, a grid shape),
One in which each recess is formed in a triangular shape and the individual recesses are surrounded by a convex portion wall, and another in which each convex portion is formed in a scattered shape and each adjacent recess is continuous. Among them, other conditions are also taken into consideration.) The toner should not adhere to the projections as much as possible (for example, it should be an irregular shape and a material that does not allow the toner to adhere to the projections as much as possible). Good appearance, feel and feel.

The image receiving sheet according to the present invention is not limited to the above. For example, the image receiving sheet may be provided on a sheet core layer made of paper or the like.
Polyethylene, acrylic, or a thermoplastic resin alone such as polyester, or a layer of a surface layer material obtained by kneading a white pigment such as titanium oxide, zinc oxide, silica, alumina, clay, and talc, an extender pigment, and the like, For example, a case in which a concave-convex surface is formed by press-molding with a master roller to produce an uneven surface can be exemplified.

When there is a possibility that the toner is strongly attracted and charged to such an extent that it becomes difficult to separate and remove the toner, a pigment having a semiconducting property (for example, a white pigment) is used for the surface layer material.
It is also conceivable to knead titanium oxide, zinc oxide or the like. Various developers including a toner used in the non-fixing type image forming method and the image forming apparatus according to the present invention can be considered.

As for the toner, the following can be considered. High-durability, easy to recycle without fixing property, small particle size (necessary to reduce the projections on the uneven surface of the image receiving sheet to improve image quality) Magnetic toner (separation and removal from the image receiving sheet It can be easily performed by utilizing magnetic force. Impurity can be easily separated at the time of re-use.) Spherical, amorphous, etc., any of which may be used, but adhesion to the image receiving sheet is performed smoothly, and toner is separated and removed from the image receiving sheet. Etc. can be easily performed.

Since the spherical toner easily rolls by electrostatic force, it can be said that there is an advantage that the possibility that the spherical toner remains on the convex portion having high potential energy on the concave and convex surface of the image receiving sheet is reduced. Although chargeability is considered desirable, conductive toner may be considered depending on the properties of the image receiving sheet. A product that can be manufactured at low cost, is environmentally safe, has good image holding properties and durability.

The developer used for the non-fixing type image forming method and the image forming material recycling method according to the present invention may be a so-called one-component developer or a two-component developer containing particles corresponding to a toner and a carrier. it can. When a two-component developer is used, the toner can be made magnetic and the particles corresponding to the carrier can be made non-magnetic, contrary to the conventional two-component developer that requires fixing processing. is there.
In that case, even if non-magnetic particles adhere to the image receiving sheet, if the particles are transparent particles or particles of the same color as the image receiving sheet surface (for example, white particles when the image receiving sheet is white), No problem.

When a two-component developer containing a chargeable magnetic toner and a non-magnetic carrier-equivalent particle is used as a developer, when the toner is separated from the image receiving sheet by utilizing the electrostatic force, the toner is alternately superimposed on the electrostatic force. A bias (in other words, an oscillation bias) (for example, an AC bias) may be applied. When an alternating bias (oscillation bias) is applied, the separation of toner becomes easier by the effect of the non-magnetic charged particles oscillating and colliding.

From the above viewpoints, examples of the developer containing a toner that can be used in the non-fixing type image forming method and the image forming apparatus according to the present invention include, for example, a colored charging magnetic toner and a colored charging magnetic toner. Examples of the developer include a mixture of chargeable transparent and / or white particles having a charge polarity opposite to the charge polarity. Such a colored and chargeable magnetic toner is not limited thereto, and examples thereof include those containing a ferromagnetic ferrite powder as a magnetic material.

The transparent or (and) white particles can be exemplified by particles of an organic compound or an inorganic compound having a contact charging property of a polarity opposite to that of the toner. From the viewpoint of size, the colored charging magnetic toner has a particle diameter of, for example, 5 μm.
For example, the transparent or (and) white particles may have a particle size of, for example, about 5 μm to 30 μm.

When the particle size of the toner and the particle size of the transparent and / or white particles exceed 30 μm, the resolution of the image decreases. When the thickness is less than 5 μm, the separating property from the image receiving sheet becomes poor. Therefore, a particle size in the above range is preferred.

[0049]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A shows a schematic configuration of an example of an image forming apparatus capable of performing a non-fixed image forming method according to the present invention. The image forming apparatus shown in FIG. 1A includes a photosensitive member 1 as an electrostatic latent image carrier. The photoconductor 1
A charger 2, an image exposing device 3, a developing device 4, a transfer device 5, a cleaning blade 6, and a static eliminator 7 are arranged in this order.

The developing device 4 also functions as a part of the toner separating and removing device 8. In the drawing, a continuous type folded image receiving sheet supply unit 101 is provided on the left side of the developing device 4, and a convex toner removing device 9 is provided on the right side of the photoconductor 1 and the transfer device 5.
However, a discharge tray 102 for discharging the image receiving sheet on which the toner image is formed is further provided on the right side.

In forming an image, the photosensitive member 1 is driven to rotate clockwise in the figure by a driving device (not shown). The charging charger 2 receives a DC voltage (for example,-
600 V) can be applied to uniformly charge the surface of the photoconductor 1 that is driven to rotate to a predetermined potential.

The image exposure device 3 forms an electrostatic latent image by exposing the charged area on the photoreceptor 1 by the charging charger 2 in accordance with the image information of the document. In addition, the image exposure apparatus may include a scanner that optically scans a document image and exposes the photoconductor 1 to an image. The developing device 4 has a magnet roller Mg having a magnetic pole and a developing roller 41 fitted on the outside thereof. At the time of development, the developing roller 41 is driven to rotate clockwise in the figure by a driving device (not shown). Further, a DC developing bias (for example, -200 V) is applied to the developing roller 41 from the power supply PW4.

The developer DV used for the development is not limited to this, but here, a black negatively-charged magnetic toner is mixed with non-magnetic white particles of contact chargeability (positive chargeability) equivalent to a carrier. Developer. The toner contains ferromagnetic ferrite powder as a magnetic material. Each of the toner and the white particles has a particle size of about 3 μm to 30 μm, but here is about 10 μm.

Now that the particle size of the toner and the like has been described,
The unevenness of the image receiving sheet related to this will be described first. The image receiving sheet S is not limited to this, but here, as shown in FIG. 4F, a sheet core layer s made of paper.
1 has an uneven layer s2 made of a synthetic resin and a white pigment on one side, and is entirely white. FIG. 4 (F)
In the above, T is an exaggerated toner.

As shown in FIG. 4 (A), the pattern of the concavo-convex pattern is composed of a square-shaped concave portion R and a convex portion P surrounding each concave portion, wherein the concave portions R are uniformly formed. As shown in FIG. 4B, a pattern in which groove-shaped recesses R in which the projecting wall P rises on both sides are uniformly dispersed in parallel, FIG.
As shown in FIG. 4 (C), the convex portions P having a circular cross section are uniformly dispersed and formed, and a region surrounded by the convex portions is formed as a concave portion R. As shown in FIG. In the pattern of FIG. 4C, a convex portion P having a non-circular cross section (such as an ellipse) is used instead of the convex portion having a circular cross section. As shown in FIG. 4E, the pattern shown in FIG. Circular convex portions are provided without making their directions constant, but a pattern or the like uniformly formed as a whole can be exemplified. Above all, the pattern shown in FIGS. 4A and 4B is excellent for the protective effect of the toner image, and the pattern shown in FIG. 4B is excellent in the overall cleaning property, and is highly practical. The pattern in FIG. 4E depends on the size, shape, etc. of the projections, but when the toner image forming surfaces of the image receiving sheets are overlapped with each other, the projections enter the recesses and the toner image is formed. Can be suppressed.

Here, the pattern shown in FIG. 4C is employed. In FIG. 4F, the recess s21 in the uneven surface s2 ′ provided by the uneven layer s2 has a width D of, for example, 3
Although it is about 0 μm to 500 μm, here, the minimum inner diameter is about 50 μm. The height H of the projection s22 is, for example, 5
Although it is set to about μm to 150 μm, it is set to about 40 μm here. The thickness, width, or diameter W of the projection is, for example, 0.1.
5 μm to 30 μm. Here, the maximum width of the convex portion is approximately 2 μm.
It is 0 μm.

In the image receiving sheet S, the concave portions s21 and the convex portions s22 on the concave and convex surface s2 'are formed substantially uniformly in a dispersed manner, and the total area occupied by the concave portions s21 on the concave and convex surface s2' is the total area occupied by the convex portions s22. Larger, each recess s2
1 is deeper and wider than the toner size and can receive a plurality of toners inside. Here, a continuous type folded image receiving sheet is employed, but the image receiving sheet may be a single-sheet type.

Returning to the image forming apparatus, the toner separating and removing device 8 includes the developing device 4 and a charger 81 disposed above the developing roller 41 with an image receiving sheet conveying path therebetween. Here, the charger 81 is a corona discharge type charger, but may be a charger such as a charging brush type or a charging roller type. Charger 8
1 shows the toner separation and removal from the image receiving sheet S,
A DC voltage (for example, −
1000V) and an AC voltage are superimposed and applied.

The transfer device 5 is formed of a corona discharge type charger here, and a DC transfer voltage (for example, -1000 V) is applied from the power source PW5 when transferring the toner image from the photosensitive member 1 to the image receiving sheet S. . The convex toner removing device 9 includes a convex cleaning roller 91 facing the image receiving sheet conveyance path and disposed below the image receiving sheet conveyance path.
And a blade 92 that scrapes off toner and the like on the roller 91. It should be noted that other toner removing means, for example, a brush roller, may be employed instead of the blade 92 for scraping the toner or the like. Charging device 9
0 is the corona charger here.

The convex cleaning roller 91 is provided as shown in FIG.
As shown in (B) and (C), at least the surface layer 91
a is formed of a conductive material, and its surface layer 91a
Has a width Wd of 10 μm to 20 μm and a depth d of 5 μm to 20 μm.
The interval Sp between muscle grooves of about μm is adjacent to 2 μm to 20 μm.
μm, in parallel with each other, a large number of these are formed in stripes, and acrylic resin, polyester resin,
An insulating resin selected from an epoxy resin or the like is embedded so that the entire surface of the roller is finished smoothly.

The insulating resin portion 91b dispersed and formed in the stripe shape on the convex cleaning roller 91 is used as a portion for forming a local electrostatic field of a fine pattern. To remove the convex toner on the image receiving sheet, a DC voltage (for example, 800 volts) having a polarity opposite to the charging polarity of the convex toner is applied from the power supply PW9 to the charger 90.
Thereby, the local electrostatic field forming portions 91b of the fine pattern dispersedly formed on the surface of the convex cleaning roller 91 are uniformly charged. Thus, a local electrostatic field capable of adsorbing the toner on the convex portion of the image receiving sheet onto the roller 91 is formed, while the concave toner on the concave and convex surface of the image receiving sheet is not adsorbed.

The blade 6 in contact with the photosensitive member 1 and the roller 91 and the blade 92 just described are formed by a case 93.
And a developer return supply device 60 that returns developer to the developing device 4 by a transport screw 61 provided below the case and a developer transport tube 62 extending from the transport screw 61 and connected to the developing device 4. Is formed. According to the image forming apparatus described above, the surface of the photoconductor 1 is uniformly charged by the charging charger 2, and the charged area is subjected to image exposure from the image exposure device 3 based on the document image information.
An electrostatic latent image is formed on the photoconductor 1. This electrostatic latent image is developed by the developing device 4 to become a visible toner image.

The developing device 4 is rotated clockwise in the figure with the developer DV having ears in the state of a magnetic brush containing magnetic toner on the surface of the developing roller 41, and is electrostatically driven under the application of a developing bias. Develop the latent image. The toner image thus formed moves to a certain transfer area of the transfer device 5 as the photoconductor 1 rotates.

On the other hand, the image receiving sheet S is pulled out from the image receiving sheet supply section 101 and is sent to the transfer area by the feed roller pair F1. In the meantime, a toner image that has already been formed on the image receiving sheet S is separated and removed by the toner separating and removing device 8. In the toner separation and removal device 8, the charge for toner separation and removal is given to the image receiving sheet S by the charger 81. As a result, the toner adhering to the concave portion on the concave and convex surface of the image receiving sheet moves away from the concave portion toward the developing roller 41 or is easily separated from the concave portion. Further, under the influence of the stirring of the magnetic force by the magnetic brush spikes on the developing roller 41 and the electrostatic force, the toner moves to the developing roller 41 side in any case. In exchange for this, some of the white particles in the ears adhere to the image receiving sheet S, effectively acting to remove black toner. The separated and removed toner is reused in the developing device 4.

The image receiving sheet S from which the toner has been separated and removed reaches the transfer area, where the transfer device 5 transfers the toner image on the photoreceptor 1. This toner image transfer is performed by electrostatic transfer of the toner in the toner image mainly to the concave portion s21 (see FIG. 4F) of the uneven surface of the image receiving sheet. The white particles that have been transferred to the photoreceptor 1. After the transfer, the developer remaining on the photoreceptor 1 is removed by the blade 6, returned to the developing device 4 by the developer return supply device 60, and reused. After the transfer, the charge remaining on the photoconductor 1 is erased by the charge removing device 7.

The image receiving sheet S onto which the toner image has been transferred as described above reaches the convex toner removing device 9. The convex cleaning roller 91 of the device 9 is driven to rotate close to the image receiving sheet S, and a local electrostatic field of a fine pattern for attracting the convex toner is dispersed and formed on the surface by the charging device 90. Thus, the convex toner is attracted to the local electrostatic field forming portion 91b of the convex cleaning roller 91, whereby the convex toner is removed.

The toner thus removed is supplied to the roller 91.
The toner is scraped off by the blade 92 that comes into contact with the developing device 4, returned to the developing device 4 by the return supply device 60, and reused. The toner image forming sheet S on which the toner image is formed and the toner is removed from the convex portions is fed by the feed roller F2 and stored in the discharge tray 102. Note that an image receiving sheet pressing member 94 may be arranged to face the roller 91 to more reliably bring the image receiving sheet S conveyed closer to the convex cleaning roller 91.

In the toner image formed on the toner image forming image receiving sheet S, the toner constituting the toner image enters the concave portion s21 of the image receiving sheet uneven surface s2 'and is protected by the convex portion s22 of the uneven surface. . Therefore, the toner image formed on the image receiving sheet is not required to be subjected to a fixing process by heating or the like as in the conventional image forming method unless a special external force is applied. The state of the image can be maintained. Significant disturbance of the toner image due to slight external force such as contact between the image receiving sheets in the case of viewing the toner image on the image receiving sheet, storing the image receiving sheet, or simply moving the image receiving sheet, or light finger contact with the image receiving sheet Inconveniences such as adhesion of toner to the back surface of the image receiving sheet superposed thereon do not occur.

Further, since the toner on the image receiving sheet is only removably adhered, the toner can be separated and removed again, and the toner thus separated and the image receiving sheet after the toner removal can be reused. Next, another example of an image forming apparatus capable of performing the non-fixing type image forming method according to the present invention will be described with reference to FIG.

The image forming apparatus shown in FIG.
In the image forming apparatus shown in FIG. 1A, a developing device 4 'is employed in place of the developing device 4, and a toner separation and removal device 8' is provided on the upstream side separately from the developing device 4 '. A convex toner removing device 9 'instead of the device 9
Is adopted. Other components are the same as those of the device shown in FIG. The same applies to the developer DV and the image receiving sheet S. The same parts and portions as those of the apparatus of FIG. 1A are denoted by the same reference numerals.

The developing device 4 ′ has a magnet roller Mg 1 having a magnetic pole and a developing roller 41 ′ externally fitted to the same, similar to the developing device 4.
1 'is driven to rotate clockwise in the figure by a driving device (not shown). The developing roller 41 'has a power source PW4.
, A DC developing bias (for example, -200 V) is applied. This developing device 4 'develops an electrostatic latent image on the photoconductor 1 in the same manner as the developing device 4 shown in FIG.

The toner separation and removal device 8 ′ includes a magnet roller Mg 2 having a magnetic pole and a roller 40
One. The lower side of the roller 401 is surrounded by the case 40. The case 40 also contains the developer DV in advance.
The toner separation / removal device 8 ′ also includes a charger 81 installed above the roller 401 with the image receiving sheet conveyance path therebetween.

At the lower end of the case 40, a conveying screw 402 is provided. The screw 402 and the toner conveying pipe 4 extending from the screw 402 and connected to the developing device 4 '.
03 and the like, a toner return supply device 400 is formed. To separate and remove the toner from the image receiving sheet S passing through the toner separating and removing device 8 ', the roller 40
1 is driven to rotate clockwise in the figure by a driving device (not shown). Further, a DC bias (for example, -200 V) is applied to the roller 401 from the power supply PW4 '. Further, a DC voltage (for example, -1000 V) for toner separation and removal and an AC voltage are superimposedly applied to the charger 81 from the power supply PW8.

Also in this toner separation and removal device 8 ′,
As in the toner separation and removal device 8 shown in FIG. 1, the toner on the image receiving sheet S is transferred to the roller 401 side by electrostatic force and magnetic force and is separated and removed from the image receiving sheet. It adheres to the image receiving sheet and works effectively for toner separation and removal. The toner separated and removed is returned to the developing device 4 'by the toner return supply device 400, and is reused.

The subsequent formation of the toner image on the image receiving sheet from which the toner has been removed is the same as that of the image forming apparatus shown in FIG. After the toner image is formed, the toner is removed from the convex portions of the concave and convex surface of the image receiving sheet by a convex toner removing device 9 '. FIGS. 2A and 2B show the convex toner removing device 9 '.
As shown in FIG. 7, a convex cleaning roller 91 ′ facing the image receiving sheet transport path and disposed below the image receiving sheet transport path,
It comprises a charging roller 90 'for charging 1' and a blade 92 for scraping off toner and the like on the roller 91 '.
It should be noted that other toner removing means, for example, a brush roller, may be employed instead of the blade 92 for scraping the toner or the like.

The convex cleaning roller 91 'is the same as that shown in FIG.
As shown in (B), the portion for forming a local electrostatic field has a coating surface layer 91b 'having a thickness of about 5 μm to 20 μm made of an insulating resin selected from acrylic resin, polyester resin, epoxy resin and the like. . The charging roller 90 'has a large number of irregularities on its surface, and a DC voltage (for example, 800 volts) having a polarity opposite to the charging polarity of the convex toner is applied from the power supply PW9 to remove the convex toner on the image receiving sheet. . As a result, the concave toner on the concave and convex surface of the image receiving sheet does not adhere to the coating surface layer 91b 'of the convex cleaning roller 91', but the local electrostatic field of a fine pattern capable of attracting the toner on the convex portion of the image receiving sheet onto the roller 91 is dispersed and formed. I do.

The local electrostatic field of such a fine pattern has a width of about 10 μm to 20 μm, and is formed in a stripe shape composed of myoelectric fields arranged in parallel and close to each other with an interval between adjacent ones of about 2 μm to 20 μm. The image receiving sheet S onto which the toner image has been transferred reaches the convex toner removing device 9 ', where the convex toner is removed. At this time, the convex cleaning roller 91' of the device 9 ' , And a local electrostatic field of a fine pattern for attracting the convex toner is dispersed and formed on the surface by the charging roller 90 ′. Thus, the convex toner is adsorbed and removed by the convex cleaning roller 91 '.

The toner thus removed is transferred to the roller 9
The toner is scraped off by the blade 92 abutting on 1 ′, returned to the developing device 4 by the return supply device 60, and reused.
The toner image forming sheet S on which the toner image is formed and the toner is removed from the convex portions is fed by the feed roller F2 and stored in the discharge tray 102. Note that the image receiving sheet pressing member 94 ′ for bringing the conveyed image receiving sheet S closer to the convex cleaning roller 91 ′ more reliably.
May be arranged to face the roller 91 '.

Still another example of an image forming apparatus capable of performing the non-fixed image forming method according to the present invention will be described with reference to FIG. The image forming apparatus shown in FIG.
In the image forming apparatus shown in (1), the developing device 4 "is replaced with the developing device 4", the toner separating / removing device 8 "is replaced with the developing device 4", and the convex toner removing device 9 is replaced with the upstream toner separating / removing device 8 ". And a projection toner removing device 9 ″. The other points are the same as those of the apparatus shown in FIG. The same parts and portions as those of the apparatus of FIG. 1A are denoted by the same reference numerals. The same applies to the image receiving sheet S. However, the used developer DV ′ is a one-component developer composed of a negatively-chargeable magnetic toner.

The developing device 4 ″ has a magnet roller Mg 3 having a magnetic pole and a developing roller 41 ″ externally fitted to the magnet roller Mg 3 similarly to the developing device 4.
1 "is driven to rotate clockwise in the figure by a driving device (not shown). The power supply PW4 is applied to the developing roller 41".
1 to a DC developing bias (for example, -200 V) is applied. The developing device 4 ″ develops the electrostatic latent image on the photoconductor 1 with a magnetic brush made of magnetic toner formed on the surface of the developing roller 41 ″.

The toner separation and removal device 8 ″ is composed of a magnet roller Mg 4 having a magnetic pole and a roller 40
The lower side of the roller 401 "is surrounded by a case 40". The developer DV 'is also stored in the case 40 "in advance, and circulates between the developer DV' and the developing device. The toner separation / removal device 8 ″ is provided with a roller 401 ″ with the image receiving sheet conveyance path therebetween.
Also includes a charger 81 ″ installed above.

A transport screw 402 is provided at the lower end of the case 40 ″.
A toner returning / supplying device 400 is formed from a toner conveying pipe 403 extending from the developing device 4 ″ and connected to the developing device 4 ″. In separating and removing the toner from the image receiving sheet S passing through the toner separating and removing device 8 ″, Roller 40
1 "is rotationally driven clockwise in the figure by a driving device (not shown).
, A DC bias (for example, -200 V) is applied.
Further, a DC voltage (for example, -1000 V) for toner separation and removal and an AC voltage are superimposedly applied to the charger 81 "from the power supply PW8".

In the toner separation and removal device 8 ″,
1, the toner on the image receiving sheet S is transferred to the roller 401 "side by electrostatic force and magnetic force and separated and removed from the image receiving sheet S. The separated and removed toner is The toner is returned to the developing device 4 ″ by the toner return / supply device 400, and is reused.

The subsequent toner image formation on the image receiving sheet from which the toner has been removed is the same as that of the image forming apparatus of FIG. 1 except that the developing device 4 ″ is used instead of the developing device 4. The convex toner removing device 9 ″ includes a convex cleaning roller 91 ″ disposed below the image receiving sheet conveyance path and a blade 92 that scrapes toner and the like on the roller 91 ″.

The convex cleaning roller 91 ″ is formed by embedding a ferromagnetic material magnetized in stripe-shaped recesses formed by stripes formed in the vicinity of the roller surface portion 91c made of a nonmagnetic material. The portion 91d made of the magnetized ferromagnetic material has a width Wd ′ of 2 μm.
20 μm, the depth d ′ is 5 μm to 20 μm, and the distance Sp ′ between adjacent ones is about 2 μm to 20 μm, and they are dispersedly formed in stripes composed of parallel and closely arranged streaks as a whole. A local static magnetic field of a fine pattern that adsorbs the magnetic toner attached to the projections of the uneven surface is provided.

Blade 6, convex cleaning roller 9
1 "and the blade 92 are surrounded by a case 93, and a conveying screw 61 is provided at a lower end portion of the case 93. The conveying screw 61 and a conveying pipe 62 extending therefrom and connected to the developing device 4" are connected. And a developer return supply device 60 is formed. The image receiving sheet S to which the toner image has been transferred reaches the convex toner removing device 9 ″, where the convex toner is removed. At this time, the convex cleaning roller 91 ″ of the device 9 ″ is charged with the image receiving sheet S. , And the magnetic toner on the convex portion is attracted to and removed from the convex cleaning roller 91 ″ by a magnetic force.

The toner removed in this manner is applied to the roller 9
The toner is scraped off by the blade 92 contacting 1 ", returned to the developing device 4 by the return supply device 60, and reused.
The toner image forming sheet S on which the toner image is formed and the toner is removed from the convex portions is fed by the feed roller F2 and stored in the discharge tray 102. Note that the image receiving sheet pressing member 94 ″ for bringing the conveyed image receiving sheet S closer to the convex cleaning roller 91 ″ more reliably.
May be provided.

[0088]

According to the present invention, there is provided an image forming method for forming a toner image on an image receiving sheet. The toner image can be separated and removed from the image receiving sheet without fixing the toner image to the image receiving sheet as in the prior art. The present invention provides a non-fixing type image forming method capable of forming an image while holding the toner image as described above, thereby enabling the toner or the image receiving sheet to be reused from the image receiving sheet on which the toner image is formed. Can be.

Further, according to the present invention, it is possible to provide a non-fixing type image forming apparatus suitable for carrying out the non-fixing type image forming method according to the present invention.

[Brief description of the drawings]

FIG. 1A is a diagram showing a schematic configuration of an example of an image forming apparatus capable of performing a non-fixing type image forming method according to the present invention, and FIG. 1B is a diagram showing a convex portion shown in FIG. FIG. 4 is a perspective view of a cleaning roller, and FIG. 4C is a cross-sectional view of a part of the projection cleaning roller.

FIG. 2A is a diagram showing a schematic configuration of another example of an image forming apparatus capable of performing the non-fixing type image forming method according to the present invention, and FIG. 2B is a projection shown in FIG. FIG. 4 is a cross-sectional view of a section cleaning roller.

FIG. 3A is a diagram showing a schematic configuration of still another example of an image forming apparatus capable of performing the non-fixing type image forming method according to the present invention, and FIG. 3B is a diagram shown in FIG. FIG. 3 is a cross-sectional view of a part of a convex cleaning roller.

FIGS. 4A to 4E are diagrams each showing an uneven pattern on the image receiving sheet, and FIG. 4F is an enlarged sectional view of an example of the image receiving sheet.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 photoconductor 2 charging charger PW1 power supply for photoconductor charging 3 image exposure device 4 developing device Mg magnet roller 41 developing roller DV developer PW4 power supply device for developing bias 5 transfer device PW5 transfer power source 6 cleaning blade 60 developer return Supply device 61 Transport screw 62 Developer transport tube 7 Static eliminator 8 Toner separation and removal device 81 Charger PW8 Power supply 9 Convex toner removal device 90 Charger 91 Convex cleaning roller 91a Conductive surface layer portion 91b Local electrostatic field forming portion 92 Cleaning Blade 93 Case 94 Pressing member 101 Image receiving sheet supply unit 102 Discharge tray S Image receiving sheet s1 Sheet core layer s2 Concavo-convex layer s2 'Concavo-convex surface s21 Concave part s22 Convex part T Toner P Convex part wall R concave part 4' Developing device 41 'Development Low LA Mg1 magnet roller 8 ′ toner separation and removal device 401 toner separation and removal roller Mg2 magnet roller 40 case 400 toner return supply device 402 transport screw 403 toner transport tube PW4 ′ power supply 4 ″ developing device Mg3 magnet roller 41 ″ developing roller PW41 power supply DV 'Developer 8 "Toner separation and removal device Mg4 magnet roller 401" Toner separation and removal roller 40 "Case PW40 Power supply PW8" Power supply 9' Convex toner removal device 90 'Charging roller 91' Convex cleaning roller 91b 'Coating surface layer (local 94 'pressing member 9 "convex toner removing device 91" convex cleaning roller 91c roller surface layer 91d magnetized ferromagnetic material portion 94 "pressing member

Claims (7)

[Claims] 1. An image forming method for forming a toner image on an image receiving sheet, wherein the image receiving sheet has an uneven surface formed with a large number of concave portions capable of receiving toner, and the uneven surface of the image receiving sheet is used. A toner image is formed by removably attaching the toner to the concave portion, and the toner adhering to the convex portion of the concave and convex surface of the image receiving sheet at the time of forming the toner image is subjected to a local electrostatic field and / or a local static magnetic field of a fine pattern. Is brought into contact with or close to the convex portion so as to adsorb and remove it on the cleaning rotary member so that the toner adhered to the concave portion is protected by the convex portion of the concave and convex surface of the image receiving sheet. A non-fixing type image forming method, wherein the formed toner image is formed as the formed image. 2. A method according to claim 1, wherein said toner is a chargeable toner. In forming a toner image on said image receiving sheet, said toner is electrostatically attached to a concave portion of said concave and convex surface of said image receiving sheet. 2. The non-conductive cleaning member according to claim 1, wherein a local electrostatic field of a fine pattern having a polarity opposite to the charging polarity of the toner adhered to the convex portion of the concave and convex surface of the image receiving sheet is dispersed and formed on the surface when forming the toner image. Fixing image forming method. 3. A toner according to claim 1, wherein said toner is a magnetic toner. When forming a toner image on said image receiving sheet, said toner is electrostatically attached to a concave portion of said uneven surface of said image receiving sheet.
The non-fixing type image forming method according to claim 1, wherein a convex cleaning rotator in which a local static magnetic field of a fine pattern is dispersedly formed on a surface is used as the convex cleaning rotator. 4. An image receiving sheet having a concave and convex surface formed with a number of concaves capable of receiving toner used for forming a toner image, the toner being removably attached to the concaves to form a toner image on the image receiving sheet. A toner image forming apparatus, and a projection which is disposed downstream of the toner image forming area on the image receiving sheet in the image receiving sheet transport direction in the image receiving sheet transport direction and removes toner attached to the convex portion of the image receiving sheet uneven surface. And a convex toner removing device, wherein the convex toner removing device is disposed so as to be in contact with or close to the convex portion of the concave and convex surface of the image receiving sheet sent from the toner image forming area, and forms a local electrostatic field. A cleaning unit having a convex portion formed on the surface thereof, and a portion for forming a local electrostatic field of the cleaning unit for rotating the convex portion, and charging the convex portion of the image receiving sheet to the surface of the cleaning rotator by charging. An image forming apparatus characterized by comprising a charging device for distributing a localized electrostatic field of a fine pattern for electrostatically adsorbing chromatography. 5. A cleaning device according to claim 1, wherein said convex cleaning rotator has a local electrostatic field forming portion of a fine pattern made of a chargeable insulating material dispersedly formed on a surface thereof as said local electrostatic field forming portion. The image forming apparatus according to claim 4, wherein the charging device is a charging device that uniformly charges each of the local electrostatic field forming units. 6. The rotating member for cleaning a convex portion has a coating surface layer made of a chargeable insulating material as the portion for forming a local electrostatic field, and the charging device locally disperses and charges the roller surface layer. 5. The image forming apparatus according to claim 4, wherein the charging apparatus is a charging device for dispersing and forming a local electrostatic field of the fine pattern. 7. A toner image is formed on an image receiving sheet having a concave and convex surface formed with a number of concave portions capable of receiving toner used for forming a toner image by removably attaching the toner to the concave portion. A toner image forming apparatus, and a projection which is disposed downstream of the toner image forming area on the image receiving sheet in the image receiving sheet transport direction in the image receiving sheet transport direction and removes toner attached to the convex portion of the image receiving sheet uneven surface. And a convex toner removing device, wherein the convex toner removing device is disposed so as to be in contact with or close to the convex portion of the uneven surface of the image receiving sheet sent from the toner image forming area, An image forming apparatus comprising: a convex cleaning rotary member having a static magnetic field dispersedly formed on a surface thereof.