JPH01253756A - Forming method for printed image - Google Patents

Abstract

PURPOSE:To surely form a satisfactory printed image free of crack and distortion by peeling and removing a separator from a separable resin and placing a supporting sheet, an adhesive layer carrying a toner image and a separable resin layer. CONSTITUTION:In case of a color image, the supporting sheet 4, the adhesive layer 1 and the separable resin 3 are returned to the position before the sheet 4 is not applied yet by separating a pressure roller 40B from a pressure roller 40A and reversely conveying the roller 40B. The adhesive layer 1 carrying a toner image is applied to the separable resin layer 3 on the supporting sheet, which is forcibly returned by a supporting sheet applying device 49. Thereon color toner images are overlapped. Next, the separator 2 newly sticking to the adhesive layer is separated, and wound by a separator winding roller 33. After such operations are repeated with each color, the sheet is cut every image forming area with a cutter 42 to form a color printed image.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method of forming an image by electrophotography, and more particularly, to a method for forming a protective layer of a transferred image in a high-gradation, high-quality continuous-tone print image. The present invention relates to a print image forming method in which a transparent film can be made sufficiently thin so as not to give a sense of discomfort to an observer, and a print image without cracks or distortion can be formed using a simple device.

<Prior art and its problems> Conventionally, a -j511F electrostatic photoconductor is irradiated with a light beam modulated based on an image signal that carries a continuous tone image to form an electrostatic latent image, and then Image recording methods are known in which a hard copy of the image is formed by a conventional electrophotographic process.

Furthermore, various electrophotographic methods have been proposed in the past that allow continuous-tone images to be recorded with good gradation reproducibility. For example, in Japanese Patent Publication No. 49-38172 by the present applicant, after an electrostatic latent image formed on a photoconductor is developed into a toner image using a liquid developer (hereinafter referred to as "developer"), this An electrophotographic process is disclosed in which an adhesive tape is applied to the toner image, the toner image is peeled off, and the tape is then adhered to a final support.

The above developer is made by dispersing fine toner particles with an electric charge in an insulating liquid, and the toner particle diameter is usually 0.1 to 1.0 μm, which is smaller than that of a dry developer. , which is advantageous for recording continuous tone images.

As a method of transferring the toner image formed on a photoconductor to a support such as paper, electrostatic transfer using a corotron is widely used. There is a problem in that the transfer efficiency is poor between high-density areas and low-density areas.

On the other hand, the so-called adhesive transfer method in which a toner image is transferred to the adhesive layer described above has a transfer efficiency of 10% regardless of the image density.
Since it is close to 0%, this is also advantageous for recording continuous tone images.

This is an image forming method in which a toner image developed with a developer is transferred using an adhesive tape, and the method for monochrome images has conventionally been carried out as follows using an apparatus as shown in FIG. was.

In the illustrated apparatus, a photosensitive drum 110 having a photoconductor 111 on its circumferential surface is rotated in the direction of arrow A, and a toner image is formed on its circumferential surface by a toner image forming means 120 disposed on its circumferential surface. be done. This toner image forming means 120 is formed along the rotational direction A of the photosensitive drum 110.
Electric appliances 12! , exposure section 122, developing device 123, drum drying means 124, static eliminator 125, cleaning roller 126
, a cleaning blade 127, and the like.

The exposure 1i122 is performed using, for example, a semiconductor laser, He-N
A laser light source 122a consisting of e-laser etc. and a light beam (laser beam) emitted from this laser light source 122a
an optical modulator 122c, such as an AOM (acousto-optic modulator), which modulates the intensity of the optical signal 122b;
a modulation circuit 122d that drives the light beam t22b, and an optical deflector such as a polygon mirror that reflects and deflects the modulated light beam t22b and scans the photosensitive drum 110 in a direction substantially perpendicular to its rotation direction (direction of arrow A). 122e, and a scanning lens 122f made of an fθ lens that focuses the light beam 122b onto the photosensitive drum 110 to have a uniform beam diameter.

On the other hand, the adhesive transfer means 139 is moved by the arrow B by known means.
The photoconductor 1 on the circumferential surface of the photosensitive drum 110 is
11 and a hollow transfer roller 130 that is moved in the B' direction and separated from the photoconductor 111, and a strip of release paper (or release film) 102. , an image-receiving sheet supply roller 131 for winding and storing a transparent image-receiving sheet 101 having an adhesive surface 101' on the opposite side, and a release paper (or release film) 102 sent out from the image-receiving sheet supply roller 131. nip roller 13 that pinches the image receiving sheet 101
2A, 132B and their nip rollers 132A, 132
This becomes a release paper (or release film) winding roller 133 that winds up the release paper (or release film) 102 peeled off from the image receiving sheet 101 at the position pinched by B.

On the downstream side of the transfer roller 130, as support sheet pasting means, there are a support sheet supply roller 141 that winds and stores the support sheet 104, and a pair that presses the support sheet 104 sent out from the support sheet supply roller 141 and the image receiving sheet 101. pressure rollers 140A, 140B and a cutter 142 are provided. These pressure rollers 140
Each of A and 140B has a heat source H, , H2 therein to be heated to a predetermined temperature, and is driven to rotate in the direction of the arrow by a driving means (not shown).

The adhesive transfer device as described above operates as follows to form a printed image. That is, when recording an image on the photosensitive drum 110, the drum 110 is rotated in the direction of arrow A, and a digital image signal Sd representing a continuous tone image is sent from an image signal supply device 61 through a correction table 62 to D/D.
The image signal S is sent to the A converter 63 and converted into an analog signal by the D/A converter 63, and is sent to the aforementioned modulation circuit 122d. The modulation circuit 122d drives the light modulator 122C based on the image signal S, and thereby the light beam 1
22b is intensity-modulated in accordance with the image signal S.

- By rotating the force photosensitive drum 110 in the direction of arrow A as described above, the photoconductor 111 moves relative to the charger 121, and at this time is uniformly charged by the charger 121. The uniformly charged photoconductor 111 is irradiated with a light beam 122b emitted from a laser light source 122a and deflected by a light deflector 122e.

This light beam 122b is directed to the photoconductor 111 by the above-mentioned deflection.
one-dimensional scanning (main scanning), and photosensitive drum 11
By rotating the light beam 122b in the A direction, the light beam 122b is sub-scanned, and the photoconductor 111 is eventually moved by the light beam 122b.
The image is scanned two-dimensionally by b. As mentioned earlier, this light beam 122b is modulated based on the image signal S, and therefore, the image carried by the image signal S appears on the photoconductor 111 irradiated with the light beam 122b. An electrostatic latent image is formed.

This electrostatic latent image is developed into a toner image by a wet developer 123. This wet type developing device 123 brings a liquid developer F, which is made by dispersing fine toner particles with an electric charge in an insulating liquid, into contact with the photoconductor 111, and converts the toner particles into photoconductors by electrostatic attraction. By attaching it to the body 111,
The static T1 latent image is developed with toner.

The toner image thus formed is produced by a high-intensity light beam 1.
The portion irradiated with 22b has a lower density than the other, and the gradation of the continuous tone image carried by the image signal Sd is reproduced. After this development, the photosensitive drum 110 further rotates in the direction of arrow A, and the toner image is dried by the drum drying means 124.

On the other hand, the image receiving sheet 101 is sent out from the sheet supply roller 131 while being stuck to a strip of release paper (or release film) 102, and the release paper (or release film) is removed at a position where it is nipped by nip rollers 132A and 132B. 10
2 and the release paper (or release film) that was difficult to peel off and was peeled off 10
2 is a release paper (or release film) winding roller 133
It is wound up by. Then, the image receiving sheet 101 from which the paper pattern (or release film) 102 has been peeled off is suspended on the transfer roller 130 with the adhesive side facing outward.

When it is detected or determined by known means that the toner-developed portion of the photoconductor 111 has been conveyed to just before the position facing the transfer roller 130,
The transfer roller 130, which had been separated from the photosensitive drum 110 until then, moves in the direction B so as to press against the photosensitive drum 110 at position P1. By moving the transfer roller 130 in this way, the transfer roller 130 moves onto the photosensitive drum 11.
The image receiving sheet 10 was rotated as a result of rotation at 0 and was suspended there.
1 is pressed against the photoconductor 111 with its adhesive side.

Then, the toner image on the photoconductor 111 is adhesively transferred to the adhesive surface of the image receiving sheet 101. Thereafter, the transfer roller 130 moves in the direction B' and separates from the photosensitive drum 110. The image receiving sheet 101 on which the toner image on the photoconductor 111 has been adhesively transferred is transferred to the heated pressure roller 140A.
, 140B, and the support sheet 10 fed out from the image receiving sheet 101 and the support sheet supply roller 141.
4 are pasted together. The image receiving sheet 101 and the support sheet 104 that are stuck to each other are removed by the cutter 14.
2. As a result, as shown in FIG. 4(C), a toner image is recorded as a continuous tone image on a support sheet 104 as a support, and a transparent image receiving sheet 101 is adhered thereon to form a protective layer for the toner image. A monochrome print image can be obtained.

This is an image forming method in which a toner image developed with a developer is transferred using an adhesive tape, and the method for color images is basically the same as that for monochrome images. forming electrostatic latent images on the photoconductor as described above based on the color image signals, and developing each electrostatic latent image into a color toner image of a distinct color corresponding to the image signal; . Then, the color toner images of different colors are sequentially transferred onto a sheet of image-receiving sheet paper with their positions aligned and adhered to a support sheet, or the color toner images of each color are adhesively transferred to separate image-receiving sheets. By laminating three or four transparent image-receiving sheets, each carrying a color toner image of a different color, on a support sheet, a color print with a layered structure as shown in FIG. 4(d) is produced. An image is obtained.

In any of the image forming methods described above, after the toner image is adhesively transferred, the photoconductor 111 is charged with a static eliminator 125, cleaned by a cleaning roller 126 and a cleaning plate 127, and used for forming the next toner image. It becomes a state of suffering.

However, in the above print image forming method, as shown in FIGS. 4(C) and 4(d), the transferred image is formed between the support sheet 104 and the transparent image receiving sheet 101.
Since the image is held between the image receiving sheet 101 and the image receiving sheet 101, the image is observed through the image receiving sheet 101. At this time, if the image receiving sheet is thick, a thick film is intentionally placed over the image, which makes the viewer feel uncomfortable.

In particular, in the color image shown in FIG. 4(d), three or four image-receiving sheets are stacked, which causes a problem in that the image quality seen by the viewer is degraded. To deal with this, it is desirable to make the image receiving sheet 101 thinner, but if the image receiving sheet 101 is made thinner, the problems described below become more noticeable. That is, as shown in FIG. 5, after the release paper (or release film) 102 is peeled off from the image-receiving sheet 101, the image-receiving sheet 101 is suspended on a transfer roller 130, and the photoconductor 11
1, the toner image is transferred, and the pressure roller 1
It is not supported by anything in the process until it is not bonded to the support sheet 104 at 40A and 140B.

In this case, as described above, the thinner the image receiving sheet 101 is, the more desirable it is, but in that case, since the image receiving sheet has the property of being easily bent, the photosensitive drum 111 is
If there is a difference between the driving speed of the pressure rollers 140A and 140B, the image receiving sheet 101 may be bent or stretched, causing wrinkles in the image receiving sheet, or the position P,
Inconveniences arise in that the transferred image may be cracked or distorted. For this reason, there is a limit to how thin the image receiving sheet can be made.

Generally, the method of applying a transparent film to protect the transferred image is to attach a transparent sheet with a thickness of about 10 μm or apply a coating resin. If a thin transparent film is applied, there is a problem that the structure of the device becomes complicated and the device becomes larger.

Therefore, it has been desired to develop a print image forming method that allows easy formation of a thin transparent film for protecting a transferred image in a print image.

<Objective of the Invention> An object of the present invention is to provide a monochrome and color print image forming method that reliably provides a good print image without cracks or distortion.

Another object of the present invention is to provide a monochrome and color print image forming method that allows the transparent film provided on the transferred image to be formed sufficiently thin so as not to make the viewer feel uncomfortable.

A further object of the present invention is to provide a monochrome and color print image forming method that allows the above-mentioned print images to be easily formed using a simple device.

<Detailed Description of the Invention> In order to achieve such an object, the present inventors have conducted extensive research and found that an adhesive layer attached to a release paper (or release film) as an image receiving sheet is placed on a transparent film. Instead of using a separator that is already provided, the inventors have discovered that it is sufficient to use a separator with an adhesive layer provided through a peelable resin layer, and have completed the present invention.

That is, in the present invention, an electrostatic latent image is formed by irradiating a uniformly charged photoconductor of a photosensitive drum with a light beam modulated based on an image signal, and this electrostatic latent image is developed using a liquid developer. Developing a toner image, pressing an adhesive layer provided on a separator via a removable resin layer against the toner image to transfer the toner image to the adhesive layer, and transferring the toner image to the adhesive layer. affixing it to a support sheet, peeling and removing the separator from the releasable resin,
A print image forming method is provided, characterized in that a print image is formed by sequentially depositing the support sheet, the adhesive layer carrying the toner image, and the releasable resin layer.

Further, the present invention forms an electrostatic latent image by irradiating a light beam modulated based on one of three or four color image signals onto a uniformly charged photoconductor of a photosensitive drum. This electrostatic latent image is developed into a color toner image using a liquid developer containing a color toner of a color corresponding to the one signal, and the adhesive layer provided on the separator with a removable resin layer interposed therebetween is Transferring the color toner image to the adhesive layer by pressing against the color toner, adhering the adhesive layer to which the color toner image has been transferred to a support sheet, and peeling and removing the separator from the releasable resin layer. The support sheet, the adhesive layer carrying the toner image, and the removable resin layer are sequentially deposited to form a print image, and the static image is removed based on the color image signals of the remaining two or three colors, respectively. Formation of an electrostatic latent image, development, and color toner image transfer are performed, and the adhesive layers thereof are sequentially adhered onto the peelable resin layer, and the separators are peeled off and removed, thereby supporting color toner images of different colors. There is provided a color print image forming method characterized in that three or four adhesive layers on the peelable resin layer are adhered and laminated on the support sheet.

In the above invention, it is preferable that the releasable resin is thermally releasable.

Further, it is preferable that the releasable resin is photo-releasable.

<Specific Structure of the Invention> Hereinafter, preferred embodiments of the print image forming method of the present invention will be described in detail as shown in the accompanying drawings.

FIG. 1 is a schematic diagram showing an example of an apparatus for carrying out the print image forming method of the present invention.

Like the conventional device shown in FIG.
2c, a correction table 62 from the image signal supply device 61;
A modulation circuit 22d that drives the optical modulator 22c based on the image signal S received via the D/A converter 63 is connected. Further, as the toner image forming means 20, a photosensitive drum 10 having a photoconductor i1 on the surface is used, as in the conventional device.
Charger 21. 4-color wet developer 23Y, 23M
.

One of the developing devices 23C and 23B, a drum drying means 24, a static eliminator 25, and a cleaning row.

26, a cleaning blade 27 is provided.

However, the adhesive transfer means 39 has the following remarkable features.

This adhesive transfer means 39 is moved in the direction of arrow B by known means to a position where it comes into pressure contact with the photoconductor 11 on the circumferential surface of the photosensitive drum 10, and moved in the direction B' away from the photoconductor 11. A hollow transfer roller 30 that controls the position, and an image-receiving sheet supply roller 3 that stores a separator 2 having an adhesive layer 1 and a removable resin layer 3 by winding the adhesive layer 1 outward.
1.

Here, the adhesive layer 1 is formed of the same adhesive as the adhesive surface of the conventional image-receiving sheet. That is, a pressure-sensitive adhesive that is sticky at room temperature or becomes sticky when heated is applied to a thickness of about 1 to 20 μm.

Further, the separator 2 has a function as a temporary support for the adhesive layer 1, and its material is not particularly limited.
A paper sheet, a polyethylene sheet, etc. having a thickness of about 5 to 300 μm can be used as appropriate.

However, a major feature of the present invention is that a releasable resin layer 3 is provided between the adhesive layer 1 and the separator 2. This peelable resin layer 3 functions as a protective layer for the toner transfer image after the separator 2 serving as a temporary support for the adhesive layer 1 is peeled off after the transfer. Such a removable resin is one that becomes removable from the separator 2 by heating, for example, Japanese Patent Publication No. 47-8720.
The separator 2 can be prepared by using a known thermosetting releasable resin such as a thermosetting resin mainly containing a butadiene acrylonitrile copolymer and a monomer, telomer or polymer of N-methylolacrolamide, or by light irradiation. For example, a photocurable resin mainly containing methyl methacrylate polymer and pentaerythritol tetraacrylate, as described in JP-A-59-97140,
Photocurable resins mainly containing vinyl chloride/vinyl acetate/vinyl alcohol copolymer and pentaerythritol tetraacrylate, photocurable resins mainly containing vinyl chloride/vinyl acetate copolymer and pentaerythritol tetraacrylate, etc. A known photocurable peelable resin can be used. Further, such a peelable resin layer 3 has a thickness of 0.
It is preferable that the thickness is about 5 to 10 μm. By making the layer thickness small in this way, it is possible to eliminate the discomfort felt when observing the formed printed image as described above.

Downstream of the transfer roller 30, there is a support sheet supply roller 41 which serves as a support sheet pasting means 49 for winding and storing the support sheet 4, and a releasable resin is placed on the support sheet 4 sent out from the support sheet supply roller 41 and the separator 2. A separator winding roller 23 is provided to wind the separator 2 peeled off from the release resin 3 at a position sandwiched between a pair of pressure rollers 40A and 40B that adhere the adhesive layer 1 provided through the layer 3. A cutter 42 is provided further downstream. Here, when the releasable resin layer is thermally releasable, the pressure rollers 40A and 40B each have a heat source H, for example, inside as shown in the figure.
1, H2 and can be heated to a predetermined temperature. In addition, the pressure roller 40B is used to attach the support sheet 4 and the adhesive layer 1, and after the separator 2 is peeled off, the support sheet 40B
The support sheet 4 attached to the adhesive layer 1 is returned to the position before attachment by a driving means (not shown).

In addition, when the releasable resin layer 2 is a photo-releasable one, in the above-mentioned apparatus, an irradiation means is provided within the pressure rollers 40A, 40B or near the downstream thereof.

As the irradiation means, an ultraviolet lamp or the like can be used. Depending on the irradiation ability of the irradiation means, a heat source for fixing the transferred toner image may be provided inside the pressure rollers 40A and 40B.

Further, the adhesive transfer means 39 and the support sheet pasting means 49 of the apparatus for carrying out the present invention may be constructed as shown in FIG. 2. That is, the transfer roller 30 is in pressure contact with the photosensitive drum 10 during transfer, and the photosensitive drum 1 rotates in six directions.
However, before the support sheet 4 is attached, it is separated from the photosensitive drum 10 and comes into pressure contact with the pressure roller 40A, and is rotated as a result. In this case, the transfer roller 30 also serves as the pressure roller 40B shown in FIG.

In addition, as shown in FIG. 2, in order to make it easier to peel off the separator 2 from the removable resin 3, a peeling means 43 is provided so that the separator 2 is peeled off from the removable resin 3 at an acute angle. You can.

In the device example described above, the toner image on the photoconductor 11 is adhesively transferred to the adhesive layer 1 that exhibits adhesiveness at room temperature, but as described above, a heat-sensitive adhesive layer is used. Alternatively, adhesive transfer may be performed. In this case, the transfer roller 30 is hollow and has a heat source inside to heat it to a predetermined temperature.

Further, the apparatus described above is suitably used when the adhesive layer 1 is continuously provided on the sheet-like separator 2 via the removable resin layer 3, but the method of the present invention
As shown in the figure, a plurality of adhesive layers 1 and releasable resin 3 provided on a perforated separator 2 can also be used. Further, the support sheet 4 is not wound into a roll and stored, but may be cut into a certain size and stored in a storage tray.

<Specific Effects of the Invention> Hereinafter, the effects of the present invention will be specifically explained in the case where the apparatus shown in FIG. 1 is used.

In the toner image forming means, as in the conventional example, an image signal (in the case of color printing, one of three or four color image signals) is first applied to the photoconductor 11 of the photosensitive drum 10. An electrostatic latent image of the image carried by S is formed,
Wet type developer 23 whose electrostatic latent image corresponds to the image signal
The toner image is developed into a toner image, dried by the drum drying means 24, and rotated to position P1. Then, it is subjected to adhesive transfer, which is characteristic of the print image forming method of the present invention.

In the adhesive transfer means 39, as the image-receiving sheet supply roller 31 rotates in the direction indicated by the arrow, the adhesive layer 1 provided on the separator 2 with the releasable resin layer 3 interposed therebetween is fed out by a predetermined length.

The photosensitive drum 10 is then suspended from a transfer roller 30 located at a distance from the photosensitive drum 10 . In this case, since the adhesive layer 1 is supported by the separator 2, there is no need to provide a release paper on the adhesive surface of the adhesive layer 1 as in the conventional example. Therefore, the release paper (or release film) peeling means and the release paper (or release film) take-up roller, which were conventionally provided near the transfer roller, are no longer necessary, and the apparatus can be simplified and downsized. Also, the adhesive layer! When it is suspended on the transfer roller 30, it is suspended uniformly without bending, which improves the reliability of the adhesive transfer process.

When it is detected or determined by known means that the toner-developed portion of the photoconductor 11 has been conveyed to just before the position P facing the transfer roller 30,
The transfer roller 3 that had been separated from the photosensitive drum 10 until then
0 moves in the B direction so as to press against the photosensitive drum 10 at position P1. As the transfer roller 30 moves in this way, the transfer roller 30 rotates as a result of the photosensitive drum 10, and the adhesive layer 1 on the separator 2 suspended therefrom is rotated.
The adhesive surface of is pressed against the photoconductor 11. and,
The toner image on the photoconductor 11 is adhesively transferred to the adhesive layer l. Thereafter, the transfer roller 30 moves in the direction B' and separates from the photosensitive drum 10. The adhesive layer 1 on which the toner image on the photoconductor 11 has been adhesively transferred is sent between heated pressure rollers 40A and 40B.

On the other hand, from the support sheet supply roller 41, the support sheet 4
is sent out toward the pressure rollers 40A and 40B. Then, the pressure rollers 40A and 40B heat and press the adhesive layer 1 so that the toner image-bearing surface and the support sheet 4 are aligned with each other.

By heating and pressing the pressure rollers 40A and 40B as described above, the adhesive layer 1 and the removable resin layer 3 are uniformly adhered to the support sheet 4 without bending, and the toner image is fixed to the adhesive layer 1, and, The separator 2 is peeled off from the peelable resin layer 3. The separated separator 2 is wound up by a separator winding roller 33.

The support sheet 4 and the adhesive layer l are attached to each other.
In the case of a monochrome image, the removable resin layer 3 is cut into image forming areas by a cutter 42, thereby forming a printed image. This printed image is shown in Figure 4 (a
) It has the layer structure shown in the following.

On the other hand, in the case of a color image, the support sheet 4, the adhesive layer 1, and the removable resin layer 3 that are stuck to each other are
The pressure roller 40B is separated from the pressure roller 40A and is reversely conveyed by a known driving means, so that the support sheet 4
is returned to the position before it was pasted.

Further, in the toner image forming means 20 and the adhesive transfer means 39, toner images of different colors are formed and transferred onto the adhesive layer 1 in the same manner as described above. Then, the adhesive layer 1 carrying the toner image is stuck to the removable resin layer 3 on the support sheet in the returned position by the support sheet sticking means 49, and the color toner image is superimposed thereon. Next, the separator 3 that has been adhered to the newly applied adhesive layer is peeled off in the same manner as described above, and is taken up by the separator take-up roller 33.

After these operations are repeated for each color toner image, the cutter 42 cuts each image forming area to form a color print image. This color print image has a layered structure shown in FIG. 4(b).

Compared to the layer structure of the conventional printed image shown in FIGS. 4(c) and (d), the printed image of the present invention shown in FIG. 4(a) and (b) is Image receiving sheet 10
1 is not provided on the image receiving sheet 101, and a releasable resin layer 3, which is thinner than the image receiving sheet 101, is provided through the adhesive layer 1. Therefore, the viewer does not feel that a transparent film of considerable thickness is unnaturally placed on the toner image T.

On the other hand, in the toner image forming means 20, after the adhesive transfer of the toner image, the photoconductor 11 is transferred to the static eliminator 2 as in the conventional example.
5, and is cleaned by a cleaning roller 26 and a cleaning blade 27 to be used for the next image recording.

<Effects of the Invention> According to the print image forming method of the present invention, the adhesive layer is always integrated with the releasable resin layer and the separator until it is attached to the support sheet, so good prints without cracks or distortion can be achieved. Images are reliably obtained.

In addition, in the printed image formed, the transferred image is observed through the peelable resin layer and the adhesive layer, which are transparent films with a sufficiently thin layer thickness. There is no feeling of discomfort that the film is unnaturally attached.

Furthermore, such a method of the present invention can be easily performed using a simple device.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an exemplary apparatus for implementing the present invention. FIG. 2 is a schematic diagram of a portion near the adhesive transfer means and support sheet pasting means of another example of an apparatus for carrying out the present invention. FIG. 3 is an example of the layer structure of an adhesive layer, a removable resin layer, and a separator that can be used in the present invention, and is a cross-sectional view of a printed image obtained by the method of the present invention and a conventional method, respectively. FIG. 5 depicts a schematic diagram of an exemplary apparatus implementing the conventional method. Explanation of symbols 1... Adhesive layer, 2... Separator, 3... Peelable resin layer, 4... Support sheet, 10... Photosensitive drum, 11... Photoconductor, 30... - Transfer roller, 31... Image receiving sheet supply roller, 33... Separator take-up roller, 39... Adhesive transfer means, 40A, 40B... Pressure roller, 41... Support sheet supply roller, 49. ...Support sheet attachment means patent applicant: Fuji Photo Film Co., Ltd. 1, -
＼Representative Patent Attorney Minoru Watanabe, Pani'T-i,,,, Patent Attorney Akira Ishii ---Din'n-j F I G, 1 FIG, 2 F I G, 3

Claims (2)

[Claims] (1) A light beam modulated based on an image signal is irradiated onto the uniformly charged photoconductor of a photosensitive drum to form an electrostatic latent image, and this electrostatic latent image is converted into a toner image using a liquid developer. After development, an adhesive layer provided on a separator via a removable resin layer is pressed against the toner image to transfer the toner image to the adhesive layer, and the adhesive layer with the toner image transferred is applied to a support sheet. and peeling and removing the separator from the releasable resin,
A method for forming a print image, comprising forming a print image in which the support sheet, the adhesive layer carrying the toner image, and the releasable resin layer are sequentially formed. (2) A light beam modulated based on one of three or four color image signals is irradiated onto the uniformly charged photoconductor of the photosensitive drum to form an electrostatic latent image. , This electrostatic latent image is developed into a color toner image using a liquid developer containing a color toner of a color corresponding to the one signal, and an adhesive layer provided on the separator with a removable resin layer interposed therebetween is applied to the color toner. The color toner image is transferred to the adhesive layer by pressing the color toner image onto the adhesive layer, the adhesive layer to which the color toner image is transferred is adhered to a support sheet, and the separator is peeled off and removed from the peelable resin layer to remove the separator from the support sheet. A sheet, an adhesive layer carrying the toner image, and the releasable resin layer are sequentially deposited to form a print image, and the electrostatic latent is applied based on the color image signals of the remaining two or three colors, respectively. Image formation, development, and color toner image transfer are performed, and their adhesive layers are successively adhered onto the peelable resin layer, and their separators are peeled off and removed, and three sheets each carrying a color toner image of a different color. Alternatively, a color print image forming method characterized in that four adhesive layers on the peelable resin layer are adhered and laminated on the support sheet.