JPH0756473A - Image holding sheet recycling method, image holding sheet reproducing apparatus, and wet sheet conveying apparatus - Google Patents

Abstract

(57) [Summary] [Objective] At least a part of the treatment liquid is efficiently removed from the transfer paper 10 after the toner is removed while the treatment liquid is applied, and the transfer paper 10 is dried. A drying unit for drying the transfer paper 10 from which the toner has been removed is provided above the roller pair 409, 410 with a built-in heater 416 at substantially the same height, and the pressure contact portion of the roller pair 409, 410. A pair of entrance rollers 446 for feeding the transfer paper 10 from the pair, and a pair of discharge rollers 433 for carrying the transfer paper discharged from the pressure contact portion of the roller pairs 409 and 410.
Etc. According to this, the roller pair 409,
Since the transfer paper is fed downward from the pressure contact portion of 410, vapor rising from the transfer paper heated at the pressure contact portion does not touch the transfer paper after passing through the pressure contact portion. Therefore, it is possible to avoid a problem that the transfer paper once dried at the pressure contact portion is in contact with steam from the pressure contact portion and becomes wet again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image-holding sheet having an image-forming substance stably attached by an image-forming apparatus such as a copying machine, a facsimile machine, a printer or a printing machine. The present invention relates to a method for reproducing an image holding sheet for removing an image forming substance by applying a destabilizing liquid that makes the adhesion unstable to the image holding sheet, an apparatus therefor, and a drying apparatus that can be used in the apparatus.

[0002]

2. Description of the Related Art Conventionally, various image forming substance removing methods and devices for removing an image forming substance such as toner from a sheet as a recorded image holding sheet are known. For example, as one using a solvent, Japanese Patent Laid-Open No.
Japanese Patent Laid-Open No. 101576 discloses a method for removing an image-forming substance in which a sheet having a toner attached thereto is dipped in a soluble solvent of a toner resin and ultrasonic vibration is applied to release the toner dissolved in the solvent from the surface of the sheet. There is. In addition, JP-A-4-3
No. 00395 discloses that a printed portion of waste paper is dipped in a solvent,
Dissolve the toner by adhering it by a method such as spraying or coating, and remove the dissolved toner by washing, air suction, contact with an adsorbent, mechanical peeling or electrostatic adsorption, and then finish the paper such as drying and stretching. A method of removing an image forming substance is disclosed.

On the other hand, as one not using a solvent, for example, in Japanese Patent Application Laid-Open No. 2-255195, a heat-meltable ink or a heat-meltable ink placed on a printed material coated with a release agent on a support by an electrophotographic method or a thermal transfer method is used. A method for removing an image forming substance in which toner is adhered to the ink peeling body and removed by stacking the ink peeling body on the printed body and passing the toner between the heating roller and the pressure roller and cooling the peeled ink peeling body. Is disclosed. Further, in Japanese Unexamined Patent Publication No. 4-64472, at least an endless sheet having a heat-melting resin on the surface, a heat roller and a cooling roller for supporting and rotating the endless sheet, and a paper having a release treatment on its surface (erasable paper) There is disclosed an eraser including a pressing roller that presses against a softened or melted heat-melting resin, and a drive unit that moves these in conjunction with each other. In addition, JP-A-4-829
In Japanese Patent Publication No. 83, 83, two rollers provided in parallel to rotate in pressure contact with each other to pass the paper through the pressure contact point, a heater for heating at least one of the two rollers, and a roller passing through the pressure contact point A scraper for separating the paper from the roller,
An image forming substance removing device is disclosed, which comprises a peeling device that removes the image forming substance attached to the roller from the roller.

By the way, the above solvent-free method and apparatus are used to remove an image-forming substance from a recorded image-holding sheet on which an image is recorded on a normal paper having paper fibers exposed on its surface. For example, in an electrophotographic fixing process, an image-forming substance containing a heat-melting resin as a main component is fused to the image-holding sheet, so that the image-forming substance is firmly fixed to the fibers on the surface of the image-holding sheet. Therefore, when the image-forming substance is removed, the paper fibers on the surface are stripped together with the image-forming substance and the paper quality is damaged. In particular, in order to improve the removability of the image forming substance, when heat or pressure is applied to the above ink peeling body, endless sheet or roller, depending on various conditions, the image forming substance and the image holding sheet may be reversed. In some cases, the fixing property was increased and the removal became difficult.

Therefore, the present applicant has previously proposed that the recorded image-holding sheet has water as a destabilizing agent, an aqueous solution containing a surfactant, an aqueous solution containing a water-soluble polymer, and a surfactant and a water-soluble polymer. From an image holding sheet by holding at least one kind of water or aqueous solution selected from the group consisting of aqueous solutions containing and holding a peeling member and heat-bonding or pressure-bonding an image-forming substance to the peeling member. A method for removing an image-forming substance that peels off has been proposed (for example, Japanese Patent Application No.
-255916). According to this, only the image forming substance can be removed without relatively damaging the paper quality of the image holding sheet.

[0006]

However, since the image-holding sheet immediately after the image-forming substance is removed by this method is impregnated with the above liquid, it can be directly used for image formation in, for example, an electrophotographic copying machine. Even if it is used, it becomes difficult to stably attach the image-forming substance. Further, it is difficult to handle because it is impregnated with the above liquid.

The present invention has been made in view of the above problems, and an object of the present invention is to apply a predetermined processing liquid to an image holding sheet to remove the image forming substance, and then to carry out the image holding. Another object of the present invention is to provide an image holding sheet reproducing method and an image holding sheet reproducing apparatus which enable the sheet to be used for image formation. Another object is to efficiently dry a wet sheet. It is to provide a wet sheet drying apparatus capable of drying.

[0008]

In order to achieve the above object, the invention of claim 1 is a method of regenerating an image holding sheet, wherein the surface is fixed on the image holding sheet having a fibrous shape. The stable adhesion of the image-forming substance is made unstable by the destabilizing liquid that makes the adhesion between the image-forming substance and the surface unstable, and after removing the image-forming substance from the surface, The image-holding sheet is fed from above to the adhesive stabilizing means for adjusting the moisture content of the destabilizing liquid in the image-holding sheet, and discharged from below to adhere to the image-forming substance on the surface. Is to be stabilized again. According to a second aspect of the present invention, in an image holding sheet reproducing apparatus, the image forming sheet has the image forming material fixed on a fibrous surface, Destabilizing liquid applying means for applying a destabilizing liquid that makes the adhesive property of the image destabilizing state, and image forming substance removal for removing the image forming substance from the image holding sheet to which the destabilizing liquid is applied. Means and an adhesion-stabilizing means for adjusting the moisture content of the destabilizing liquid in the image-holding sheet from which the image-forming substance has been removed to stabilize the adhesion to the image-forming substance on the surface, and image-forming An image holding sheet from which a substance has been removed is provided with a sheet conveying means for feeding the adhesion stabilizing means from vertically above, and the adhesion stabilizing means is provided with the image holding sheet fed by the sheet conveying means. Characterized by being configured to be discharged vertically downward Than it is. Also,
According to a third aspect of the present invention, in the image-holding sheet reproducing apparatus according to the second aspect, the adhesion stabilizing means is provided with a conveyance means for holding and conveying the image-holding sheet, and the image-holding sheet is conveyed by the conveyance means. It is characterized in that the conveying speed is set to be higher than the conveying speed of the image holding sheet by the sheet conveying means. According to the invention of claim 4, in a drying device for heating a wet sheet by a heating unit to dry it, a sheet conveying means for feeding the wet sheet into the heating unit from above is provided, and the heating unit is The image holding sheet sent by the sheet conveying means is configured to be discharged vertically downward.

[0009]

According to the invention of claims 1 to 3, the image-holding sheet from which the image-forming substance is removed from the surface is sent to the adhesion stabilizing means to adjust the moisture content of the destabilizing liquid in the image-holding sheet. In this way, the adhesion of the surface to the image forming substance is stabilized again. When the image-holding sheet from which the image-forming substance has been removed from the surface is fed to the adhesion stabilizing means, it is fed from above and discharged from below. This prevents moisture that is removed from the image holding sheet and rises vertically upward from contacting the portion of the image holding sheet after the moisture adjustment. Further, in the invention of claim 4, the wet sheet is sent to the heating portion from vertically above and discharged from below. This prevents moisture that is removed from the image holding sheet and rises vertically upward in the heating unit from coming into contact with the heating unit passing portion of the image holding sheet.

[0010]

EXAMPLE First, the present invention removes toner which is a heat-melting toner (hereinafter referred to as toner) as an image forming substance from a transfer paper as an image carrier on which an image is formed by a transfer type electrophotographic copying machine. An example applied to the apparatus will be described. FIG. 1 shows an example of a toner removing device to which the present invention can be applied. In FIG. 1, the toner removing device includes a paper feeding unit 1 for separating and feeding the transfer papers 10 on which toner images are formed, which are housed in a stacked state, one by one.
A liquid applying unit 2 for supplying a liquid to the transfer paper 10 sent from the paper feeding unit 1, and a transfer paper 1 to which the liquid has been supplied.
Toner stripping unit 3 for removing toner from 0, and drying unit 4 for drying the transfer paper 10 from which toner has been removed
And a paper receiving unit 5 for receiving the transfer paper 10 discharged from the drying unit 4. The toner removing device applies a destabilizing liquid (hereinafter, referred to as a processing liquid) 20 to the transfer paper 10 by the liquid applying unit 2 to destabilize the adhesion state of the transfer paper 10 and the toner, Treatment liquid 20
Is permeated at least into the interface between the transfer paper 10 and the toner to make the adhesion between the toner and the transfer paper 10 unstable, and after peeling the toner from the transfer paper 10 by the peeling roller 302 of the toner peeling unit 3, The transfer paper is dried by the drying unit 4 so that it can be reused.

Here, as the treatment liquid 20, water, an aqueous solution containing a water-soluble polymer, an aqueous solution containing a surfactant,
At least one kind of water or an aqueous solution selected from the group consisting of an aqueous solution containing a water-soluble polymer and a surfactant can be used. Further, the water or the aqueous solution may contain a predetermined organic solvent. Moreover, as the processing liquid 20, only an organic solvent can be used.

Examples of the water-soluble polymer include starchy substances (branch starch, potato starch, tapioca starch, wheat starch, corn starch, etc.),
Mannan (konjac, etc.), seaweed (Funori, agar, sodium alginate, etc.), plant mucilage (troloois,
Gum tragacanth, gum arabic, etc.), mucilage by microorganisms (dextran, levan, etc.), protein (glue,
Gelatin, casein, collagen, etc.) natural polymers, cellulose-based (viscose, methylcellulose, ethylcellulose, hydroxyethylcellulose, carboxymethylcellulose, etc.), starch-based (soluble starch, carboxymethyl starch, dialdehyde starch) semi-synthetic polymers, Examples thereof include synthetic polymers, but are not limited thereto.

Examples of the above-mentioned surfactant include, for example,
Anionic (carboxylate, sulfonate, sulfate ester, phosphate ester, phosphonate, etc.), cationic (amine salt, quaternary ammonium salt, benzalkonium salt, benzethonium chloride salt, pyridinium) Salt, imidazolinium salt, sulfonium salt, polyethylene polyamine, etc.), amphoteric system (amino acid, carboxybetaine, sulfobetaine, aminosulfate, aminocarboxylic acid salt, imidazoline derivative, etc.), nonionic (ether type, ether ester type) , Ester type, nitrogen-containing type, polyhydric alcohol, amino alcohol, polyethylene glycol, etc.) and fluorine-based surfactants, but not limited thereto.

As the organic solvent contained in the water or the aqueous solution, turpentine, dipentene, butyl acetate, carbon tetrachloride, cellosolve acetate, xylene, toluene, ethyl acetate, diacetone alcohol, methyl cellosolve acetate, benzene, methyl ethyl ketone, Examples thereof include, but are not limited to, methyl acetate, methylene chloride, ethylene dichloride, cyclohexane, cellosolve, dioxane, acetone, methyl cellosolve, cyclohexanol, butanol and the like.

As the organic solvent used alone, carbon-hydrogen solvents such as hexane, heptane, octane, nonane, spirit, naphtha N01-6 (trade name of Shell Petroleum Co.), Isopar E, L, K, V (trade name of Exxon), IP Solvent (trade name of Idemitsu Oil Co., Ltd.), Shell-sol 70, 71, Solvesso 100,
150 (trade name of Shell Oil), Ascom OMS,
460 (trade name of Spirits), Vegasol 103
0,2130,3040 (trade name of Mobil Oil Co., Ltd.) and the like. Further, Fluorinert FC40, 43, 70, 77 (trade name of Sumitomo 3M), which is a fluorine-based solvent,
Aflude E10, 16, 18, etc., Shin-Etsu Silicone KF96 (trade name) which is a silicone solvent, Toray Silicone SH200, 344 (trade name), Toshiba Silicone T
SF431 (trade name) and the like are included, but the invention is not limited thereto.

Next, the units 1, 2, 3 of the illustrated example
4, 5 will be described. The sheet feeding unit 1 feeds the transfer sheets 10 stacked on the bottom plate 101 from the uppermost one by the sheet feeding roller 102, separates the double feeding by a separating mechanism (not shown), and forms one sheet of the transfer sheet 10. Only the registration roller pair 104 for timing adjustment and skew correction is sent out. The specific configuration and operation are the same as those of the paper feeding mechanism in the electrophotographic copying machine, and therefore detailed description will be omitted.

The liquid application unit 2 is in contact with the liquid container 201 filled with a predetermined amount of the processing liquid 20 and one surface (the upper surface in the drawing) of the transfer paper 10 and the processing liquid 20 in the liquid container 201.
The submerged conveying roller 202 that conveys the medium to guide the inside, the driving unit (not shown) of the submerged conveying roller 202, and the other surface (the lower surface in the drawing) of the transfer paper 10 into the processing liquid 20 of the liquid container 201. A submerged guide plate 203 for guiding, a pair of squeezing rollers 204 also functioning as a holding and conveying means, a squeezing rod 205 that is arranged to bite into the lower squeezing roller 204, and the like are provided.
In this unit 2, the transfer paper 10 fed from the paper feeding unit 1 is guided into the treatment liquid 20 in the liquid container 201 by the submerged conveying roller 202 and the submerged guide plate 203, and immersed in the treatment liquid 20. After being squeezed, the squeezing roller pair 204
The excess processing liquid 20 is removed by the above and is conveyed to the next toner peeling unit 3. Instead of directly passing the transfer paper 10 through the treatment liquid to apply the treatment liquid to the transfer paper 10 as in this example, the treatment liquid is applied to the surface of the transfer paper 10 by an application roller or transferred by a sprayer. The atomized treatment liquid may be attached or applied to the surface of the paper 10. Any other method can be used.

The toner peeling unit 3 includes a heating lamp 301 as a means for softening the toner T, and a pair of peeling rollers 302 as peeling members arranged in pressure contact with each other, and in the vicinity of a pressure contact portion on the transfer paper discharge side. Separation claw 30 arranged so as to contact the surface of the peeling roller 302 of
3, a cleaning device 304 for cleaning the surface of the peeling roller 302, a drive unit (not shown), and the like.

The surface of the peeling roller 302 is made of a material having an adhesive force larger than that of the transfer paper 10 and the toner to at least the softened toner. Specifically, the same or similar toner component resin as the above toner, component resin of an adhesive, or the like can be used,
In addition, aluminum-based, copper-based, nickel-based, and other metal materials can be used, but are not limited thereto. The resin may be water-soluble or water-insoluble.

Examples of the toner component resin include, but are not limited to, polystyrene resin, acrylic resin, methacrylic resin, styrene-butyl acrylic copolymer, styrene-butadiene copolymer, polyester resin and epoxy resin. Not a thing.

As the component resin of the adhesive, protein adhesives such as glue, gelatin, albumin, and casein, and carbohydrate-based adhesives such as starch-based, cellulose-based, complex polysaccharide-based (arabic gum, tragacanth gum, etc.) Agents, vinyl acetate polymers and copolymers, acrylics,
Thermoplastic adhesive such as ethylene copolymer, polyamide, polyester, polyurethane, rubber adhesive such as polychloroprene-based, nitrile rubber-based, recycled rubber-based, SBR-based, natural rubber-based, rubber-based, acrylic-based, etc. Polyethylene terephthalate (PE) with pressure-sensitive adhesive and titanium oxide dispersed
T), etc., but not limited thereto.

When the above resin is used, it is desirable to have a multi-layer structure of at least two layers of a support and a surface layer from the viewpoint of preventing elongation due to tension and heat, durability and the like. That is, when the peeling body is formed into a roller shape as in the illustrated example, it is desirable to form a peeling body by forming a surface layer made of the above resin on a roller-shaped base, for example, a rubber roller. In addition, the peeling body may be configured in a belt shape or a cut sheet shape. In any case, as a support for directly supporting the resin, a tape such as cellophane tape, kraft paper adhesive tape, polyvinyl chloride tape, acetone tape, or filament reinforcing tape can be used.

The heating lamp 301 of the upper and lower peeling rollers 302 is in close contact with the front and back surfaces of the transfer paper 10 to heat and soften the toner adhered to the transfer paper 10.
The toner is easily separated from the fibers of the transfer paper 10. It is desirable to perform this heating to such an extent that the toner on the transfer paper 10 does not melt at the pressure contact portion. This is because if the toner melts, it will be difficult to transfer the toner on the transfer paper 10 to the peeling roller 302 side without dividing the toner between the paper side and the peeling roller 302 side. If it is heated too much, the transfer paper 1 is transferred while passing through the pressure contact portion of the pair of peeling rollers 302.
0 is too dry, and the fixing force of the toner to the transfer paper 10 is stronger than that when the transfer paper 10 is wet, and the transfer paper 10 is attached to the roller 302 through the toner and is separated by the separation claw 303. There is a risk that they will not be separated. Therefore,
It is desirable to heat the transfer paper 10 after passing through the heating unit to such an extent that a little damp air remains and the re-adhesion of the toner can be prevented.

The cleaning device 304 removes the toner T on the surface of the peeling roller 302, the scraper blade 306 that scrapes off the toner T on the cleaning roller 305, and the toner T scraped off by the scraper blade 306. A toner receiver (toner container) 307 for containing the toner is provided.

At least the surface of the cleaning roller 305 has the toner T adhering to the peeling roller 302.
Of the peeling roller 302 is inferior in releasability to the toner. Specific examples of the material include, but are not limited to, aluminum-based, copper-based, nickel-based metal materials, and polymer materials such as polyethylene terephthalate (PET) in which titanium oxide is dispersed. is not.

The drying unit 4 is for drying the transfer paper 10, and is composed of an upper drying roller 402 made of, for example, aluminum and having a built-in heating lamp 401, and a lower drying roller 404 pressed against the upper drying roller 402. . The lower drying roller 404 is provided with a surface layer made of a liquid-supplying member, and a diaphragm blade 405 for squeezing the liquid on the surface layer is in contact therewith. Here, the present invention relates to the improvement of the drying unit 4, and specific examples thereof will be described later.

The paper receiving unit 5 has a paper discharge tray 501 for receiving the transfer paper discharged from the drying unit 4.

In the above-mentioned structure, the transfer paper 10 sent from the paper feeding unit 1 is supplied with the liquid uniformly on the toner image surface by the liquid applying unit 2 and then sent to the toner peeling unit 3. In the toner peeling unit 3, the toner adhered to the paper is softened by heating from the peeling roller 302 and adheres to the surface of the peeling roller 302. When the transfer paper 10 is separated from the separation roller 302 by the separation claw 303,
The toner adhering to the surface of the peeling roller 302 is peeled off from the paper, whereby the toner is removed from the paper. The paper from which the toner has been removed is dried by the drying unit 4 and discharged to the paper receiving unit 5.

As described above, according to this toner removing device, since the liquid is supplied to the paper on which the toner is attached and the liquid is permeated into the interface of the paper with the toner, the toner is peeled off, so that the paper fiber is damaged. Without, the toner can be removed.

Further, the surface of the peeling roller 302 is contacted with the peeling roller 302 while the surface of the paper is wet, and the paper is heated to such an extent that the paper can be kept wet even when it is separated from the peeling roller 302. Even when it is made of an adhesive material, it is possible to prevent the paper surface itself from adhering to the surface of the peeling roller 302 to cause separation failure, and the separated paper portion re-contacts with the peeling roller 302 to re-use the toner. Can prevent metastasis.

In this toner removing device, the transfer paper 10 is held by the two peeling rollers 302 to remove the toner from both sides of the transfer paper 10. Therefore, the toner is removed from the bottom plate 101 of the paper feeding unit 1. It is not necessary to consider the front and back sides when setting the transfer paper 10 to be removed. Further, when it is desired to remove the toner on both sides of the transfer paper used on both sides, it is only necessary to pass the inside of the apparatus once.

Further, since the discharged transfer paper 10 is dried by the drying unit 4, it is easy to handle, and the drying unit 4 returns it to a state where the toner is easily attached by drying by heating. It can be used as it is in an electrophotographic copying machine.

Next, the drying unit 4 according to the embodiment of the present invention which can be applied to the toner removing device of FIG. 1 will be described. The overall configuration of the toner removing device shown in FIG.
The transfer paper 10 is sandwiched between the two peeling rollers 302 to remove the toner from both sides of the transfer paper 10. The drying unit according to each of the following embodiments uses, for example, only one peeling roller 302. Thus, the present invention can also be applied to a toner removing device configured to remove toner from only one surface of the transfer paper 10.

First, an embodiment of the drying unit 4 will be described with reference to FIG. In FIG. 2 (a),
This drying unit has heaters 4 installed at almost the same height.
16 built-in roller pairs 409 and 410, a cover 442 that covers the periphery of these roller pairs 409 and 410, an entrance roller pair 446 that feeds the transfer paper 10 from above to the facing portion of the roller pairs 409 and 410, and an entrance roller pair. An entrance guide 426 that guides the transfer sheet conveyed by 446, a discharge roller pair 433 that conveys the transfer sheet discharged from the facing portion of the roller pairs 409 and 410, and a transfer sheet that is conveyed by the discharge roller pair 433. And a discharge guide 432 for guiding the sheet. Here, the pair of rollers 409 and 410 are the transfer paper 1
0 may be arranged so as to be in pressure contact with each other so that they can be nipped and conveyed downward, and can be rotationally driven in a predetermined direction, and they are conveyed by the entrance roller pair 446 and the paper discharge roller pair 433. The transfer paper 10 may be arranged facing each other with a gap larger than the thickness of the transfer paper 10 so that it can only be guided, and the transfer paper 10 can be rotationally driven in a predetermined direction. In the former case, the roller pair 409,
410 just below the roller pair 410 or, if necessary, with the guide by the discharge guide 432, the roller pair 409, 41.
When the paper receiving unit 5 is arranged at a position where it can be fed only by holding and transporting 0, the discharge roller 433 can be omitted.

In the above-mentioned structure, the toner peeling unit 3 with the treatment liquid applied by the liquid applying unit 2 in FIG.
The transfer paper 10 from which the toner is removed by the first is first conveyed by being sandwiched and conveyed by the entrance roller pair 446 of the drying unit, and is guided from above vertically to the facing portion of the roller pair 409 and 410 while being guided by the entrance guide 426. . Then, while being heated by the heat from the heater 416 at the facing portion of the roller pair 409, 410,
It is sent vertically downward. During this time, the temperature of the transfer paper 10 rises, the processing liquid contained therein is evaporated, and the transfer paper 10 is dried. The transfer paper that has passed through the facing portions of the roller pairs 409 and 410 is sent to the paper receiving unit 5 in FIG. 1 while being guided by the discharge guide 432 and being pinched and conveyed by the discharge roller pair 433.

As described above, according to the drying unit of the present embodiment, the roller pair 409, 410 having the heater 416 built therein is fed from above vertically and discharged vertically below, so that it is heated at the opposite portion. The vapor rising from the transfer paper does not touch the transfer paper after passing through the facing portion.
Therefore, it is possible to avoid a problem that the transfer paper portion once dried at the facing portion is contacted with the vapor from the facing portion and becomes wet again. Further, since the roller pairs 409 and 410 are provided at substantially the same height, the facing portion is opened upward and opened, so that steam can be efficiently discharged from the facing portion.

FIG. 2B is an explanatory view of a drying unit according to the modified example. The drying unit of this example includes a heater 41
6 The built-in heating roller 410 and the roller 409 made of a gas permeable member are provided at substantially the same height, and the heating roller 410 is wound around the heating roller 410 by a predetermined angle so that the heating roller 410 and the rollers 409 and 410 can be made to enter from above. . According to this, the winding efficiency around the heating roller 410 can improve the drying efficiency by heating. Further, since one roller 409 is made of a breathable member, vapor from the transfer paper portion in the facing portion or the transfer paper portion immediately after passing through the roller 409 rises through the roller 409 and separates from the transfer paper. You can go. However, in this example, since one roller 409 is not provided with a heater, the transfer paper may be curled due to the difference in the degree of drying on the front and back of the transfer paper. To prevent this curl, for example, the discharge roller pair 43
Instead of or in addition to 2, the decal roller pair may be used to eject the transfer paper.

In the drying unit shown in FIGS. 2 (a) and 2 (b), the transfer paper holding portion by the entrance roller pair 426 and the transfer paper facing portion by the roller pairs 409 and 410 (in the case of being in pressure contact with each other). Is a holding part) and the discharging roller 43
In order to suppress the bending of the transfer paper between the holding portions of the transfer paper by 3, the linear velocity is preferably set so that the transfer paper on the downstream side in the transfer paper conveyance direction becomes faster.

Further, since vapor from the transfer paper 10 is likely to adhere to the guides 426 and 432, when these are formed by a plate-like member, holes for vapor escape are formed so that air can escape. It is desirable to do. In addition, these guides 426 and 432 may be composed of a plurality of linear members made of, for example, needles.

In each of the above embodiments, the drying roller pair 402, 404 is used as the heating member, but instead of this, a belt unit may be used to constitute the drying unit. Further, the drying unit can be configured by using a heater or the like that heats the transfer paper 10 in a non-contact manner. Also in this case, as in each of the above-described embodiments, if the transfer paper 10 is fed from above the heating unit in the vertical direction and is discharged below the heating unit in the vertical direction, the efficiency of drying can be improved.

As described above, the drying unit according to the present embodiment is incorporated as a unit in the toner removing device. However, the present invention has only the drying unit which is omitted or the drying performance is insufficient. Toner is removed using a non-toner removal device, and excessive dampness still remains, so it can be applied to a single drying device for drying transfer paper that cannot be used in a transfer type electrophotographic copying machine. You can also Further, it can be used not only in a toner removing device but also in a drying unit that is incorporated in a device that applies a predetermined treatment liquid to a transfer paper, or in a single drying device that dries the transfer paper that has excessive wetness discharged from such a device. , Can also be applied.

[0042]

According to the first and second aspects of the invention, the image-holding sheet from which the image-forming substance has been removed from the surface is sent to the adhesion stabilizing means and the moisture of the destabilizing liquid in the image-holding sheet is sent. The amount is adjusted, and thereby the adhesion of the surface to the image-forming substance is stabilized again, so that the image-holding sheet after removal of the image-forming substance can be reused for image formation. In addition, when the image-holding sheet from which the image-forming substance has been removed from the surface is fed to the adhesion stabilizing means, it is fed from above and discharged from below, whereby it is removed from the image-holding sheet and vertically. Since the moisture content rising upward is prevented from coming into contact with the portion of the image holding sheet after the moisture content adjustment, the moisture content of the destabilizing liquid in the image holding sheet can be efficiently adjusted. .

In particular, according to the invention of claim 3, the adhesion stabilizing means is provided with a carrying means for holding and carrying the image holding sheet, and the carrying speed of the image holding sheet by the carrying means is set to the above-mentioned sheet. Since the conveyance speed of the image holding sheet by the conveying means is set to be higher, the moisture content of the sheet can be adjusted after or while correcting the deflection of the image holding sheet caused by the application of the destabilizing liquid. . Therefore, it is possible to prevent the flexure from remaining in the sheet after the moisture content is adjusted.

In particular, according to the fourth aspect of the invention, the wet sheet is fed to the heating portion from above vertically and discharged from below, and is removed from the image holding sheet at the heating portion and rises vertically above. Since the moisture content is prevented from coming into contact with the heating portion passing portion of the image holding sheet, the wet sheet can be efficiently dried.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a toner removing device from a transfer paper to which the present invention is applicable.

2A and 2B are explanatory views of an embodiment of a drying unit.

[Explanation of symbols]

 1 Paper Feeding Unit 2 Liquid Applying Unit 3 Toner Peeling Unit 4 Drying Unit 5 Paper Receiving Unit 10 Transfer Paper 409 Drying Roller 410 Drying Roller 416 Heat 433 Discharging Roller 442 Cover 446 Inlet Rolling Pair

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiaki Miyashita 1-3-6 Nakamagome, Ota-ku, Tokyo Within Ricoh Co., Ltd. (72) Inventor Satoshi Shingu 1-3-6 Nakamagome, Ota-ku, Tokyo In stock company Ricoh (72) Inventor Shinichi Kuramoto 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh stock company (72) Inventor Sadao Takahashi 1-3-6 Nakamagome, Ota-ku, Tokyo Ricoh Co., Ltd. (72) Inventor Kazuhiro Ando 1-3-6 Nakamagome, Ota-ku, Tokyo Ricoh Company (72) Inventor Tadashi Saito 1-3-6 Nakamagome, Tokyo Ota-ku, Ricoh Company

Claims (4)

[Claims] 1. A stable adhesion of an image-forming substance fixed on an image-holding sheet having a fibrous surface, and an unstable state of the adhesion between the image-forming substance and the surface. After destabilizing with the destabilizing solution and removing the image-forming substance from the surface, the image-holding sheet is placed above the adhesion stabilizing means for adjusting the moisture content of the destabilizing solution in the image-holding sheet. A method for remanufacturing an image-holding sheet, which comprises re-stabilizing the adhesiveness of the surface to the image-forming substance by sending in from the bottom and discharging from below. 2. A destabilizing liquid for destabilizing the adhesion between the image-forming substance and the surface is applied to an image-holding sheet in which the image-forming substance is fixed on a fibrous surface. Destabilizing liquid applying means for removing the image forming substance from the image holding sheet to which the destabilizing liquid is applied, and the image holding sheet from which the image forming substance has been removed Of the destabilizing liquid, the adhesion stabilizing means for stabilizing the adhesion to the image forming substance on the surface, and the image holding sheet from which the image forming substance is removed are And a sheet conveying means for feeding the sheet from above vertically, and the adhesion stabilizing means is configured so that the image holding sheet sent by the sheet conveying means is discharged vertically downward. Image holding sheet playback device. 3. The adhesion stabilizing means is provided with a conveying means for holding and conveying the image holding sheet, and the conveying speed of the image holding sheet by the conveying means is the conveying speed of the image holding sheet by the sheet conveying means. 3. The image-holding sheet reproducing apparatus according to claim 2, wherein the speed is set higher than the speed. 4. A drying device for heating a wet sheet by a heating unit to dry the wet sheet is provided with a sheet conveying means for feeding the wet sheet into the heating portion from vertically above, and the heating portion is provided by the sheet conveying means. An apparatus for drying a wet sheet, characterized in that the fed image-holding sheet is discharged vertically downward.