JP3235918B2 - Method and apparatus for removing image forming substance from both sides of image holding sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine, a facsimile, a printer, or the like, which is used to convert an image forming sheet such as transfer paper on which an image formed of an image forming substance such as surface toner is formed. The present invention relates to a method and an apparatus for removing an image forming substance from both sides of an image holding sheet for removing odor.

[0002]

2. Description of the Related Art Conventionally, there have been known various image forming substance removing methods and apparatuses for removing an image forming substance such as toner from a sheet as a recorded image holding sheet. For example, a method using a solvent is disclosed in
No. 1576 discloses that a sheet with toner attached thereto is immersed in a soluble solvent of a toner resin, and ultrasonic vibration is applied thereto.
There is disclosed a method for removing an image forming substance that releases toner dissolved in a solvent from the paper surface. Also, JP-A-4-3003
No. 95 discloses that a solvent is immersed in the printed portion of waste paper, adhered by a method such as spraying or coating to dissolve the toner,
There is disclosed an image forming substance removing method in which a dissolved toner is removed by a method such as washing, air suction, adsorbent contact, mechanical peeling, or electrostatic adsorption.

On the other hand, as a method using no solvent, for example, Japanese Patent Application Laid-Open No. 2-255195 discloses a hot-melt ink or an electrophotographic method in which a release agent is coated on a support and placed on a printed material by an electrophotographic method or a thermal transfer method. An image-forming substance removing method in which toner is adhered to the ink peeling body by removing the ink peeling body after cooling the ink by passing the ink peeling body over the print body, passing between a heating roller and a pressure roller, and then cooling. Is disclosed. Japanese Patent Application Laid-Open No. 4-64472 discloses at least an endless sheet having a hot-melt resin on the surface, a heat roller and a cooling roller for supporting and rotating the endless sheet, and a paper (erasable paper) with a release treatment on the surface. There is disclosed an eraser comprising a pressing roller for pressing the resin onto a softened or molten hot-melt resin, and a drive unit capable of moving the rollers in conjunction with each other. Japanese Patent Laid-Open No. 4-829
No. 83 discloses two rollers provided in parallel to rotate in contact with each other to pass paper through a press-contact portion, a heater for heating at least one of the two rollers, and a roller passing through the press-contact portion. A scraper for separating paper from the roller;
There is disclosed an image forming substance removing device including a peeling device for removing the image forming substance attached to the roller from the roller.

By the way, the above-mentioned method and apparatus which do not use a solvent can be used to remove an image forming substance from a recorded image holding sheet on which an image is recorded on ordinary paper having paper fibers exposed on the surface. Because the image forming substance is firmly fixed to the fibers on the surface of the image holding sheet, for example, by fusing the image forming substance mainly composed of the heat-fusible resin to the image holding sheet in an electrophotographic fixing step, When the imaging substance is removed, the paper fibers on the surface are peeled off together with the imaging substance, thereby damaging the paper quality. In particular, in order to enhance the removability of the image forming substance,
When heat or pressure is applied to the above-mentioned ink stripper, endless sheet or roller, depending on various conditions, conversely, the fixing property between the image forming substance and the image holding sheet may be increased to make removal difficult. There was also.

[0005] Therefore, the applicant of the present invention has previously reported that a recorded image holding sheet contains water as a destabilizing agent, an aqueous solution containing a surfactant, an aqueous solution containing a water-soluble polymer, and a mixture of a surfactant and a water-soluble polymer. Holding at least one kind of water or an aqueous solution selected from the group consisting of an aqueous solution containing, and interposing a peeling member, and peeling the image forming substance from the image holding sheet by heat bonding or pressure bonding to the peeling member. A method for removing an image forming substance has been proposed (for example, Japanese Patent Application No. 4-2.
No. 55916). According to this, only the image forming substance can be removed without relatively damaging the paper quality of the image holding sheet.

[0006]

However, in the above-mentioned conventional apparatus for removing an image forming substance from an image holding sheet, after a destabilizing agent is applied to a recorded image holding sheet, a peeling member is interposed between the image forming sheet and the image forming material. Is peeled off from the image holding sheet by heat bonding or pressure bonding to the peeling member, and if it is stamped with a vermilion mark, a shachiha (trade name) mark, or the like, the image forming substance forming the stamp is removed. It was confirmed that the toner may remain on the image holding sheet without being used. As described above, the image holding sheet in which the unremoved image of the imprint remains,
There is a risk of intentional abuse (forgery / forgery).

It has been found that such imprints cause a new problem particularly when the image forming material is removed from both sides of the image holding sheet on which images are formed on both sides. That is, when the image forming material is removed on each side of the image holding sheet on which images are formed on both sides, as long as the imprint remains on only one side, the image on the other side is temporarily Even if completely removed, this image bearing sheet cannot be easily reused. Therefore, with respect to the image holding sheet having the imprint left on at least one surface, even if the image forming material is removed from the other surface, it is useless.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in removing an image forming substance from an image holding sheet having images formed on both sides, it is possible to effectively prevent the unremoved image including imprints from being misused. Another object of the present invention is to provide a method and an apparatus for removing an image forming substance from both sides of an image holding sheet, which can efficiently reuse the image holding sheet.

[0009]

According to a first aspect of the present invention, there is provided a method for removing an image forming substance from both surfaces of an image holding sheet. When the image forming substance present on the image holding sheet after the removal of the imprint forms a seal, all or a part of the seal is made unrecognizable, and the other surface of the image holding sheet is not recognizable. the removal of the image forming substance without I row,
The image holding sheet is stored. Here, in order to make part or all of the seal imprint unrecognizable, for example, a hole is punched at the position of the unremoved image on the image holding sheet, the unremoved image is blurred, An opaque material of the same color as the sheet is applied on the top.

[0010] According to a second aspect of the invention, in the image forming substance removing method from the image holding sheet both surfaces of claim 1, the removal of the image forming substance adhering to the image holding <br/> surface of lifting sheet The image forming material that could not be removed after performing
Image holding sheets and said remaining only on either side of
Image forming substance which can not be removed by distinguish the image holding sheet remaining on both sides, the image holding was the unrecognizable sheet
It is characterized by storing the sheets .

[0011] The invention of claim 3 is the invention according to claim 1 or 2.
In the method for removing an image forming substance from both sides of the image holding sheet, the image forming substance stably adhering to the surface of the image holding sheet made of fibrous material and the state of adhering to the surface are made unstable. A peeling member is brought into contact with the image forming material in the unstable state, and the image forming material is peeled off from the surface to be removed.

According to a fourth aspect of the present invention, there is provided a sheet processing means for making all or a part of an imprint made of an image forming material present on an image holding sheet unrecognizable, and an image forming material removing means provided by the image forming material removing means. Before the removal processing is performed, it is detected in advance whether or not there is an image forming substance that constitutes an imprint that cannot be completely removed by the processing, or is removed by the processing after the image forming substance removal processing is performed. Sheet surface detecting means for detecting whether or not an image forming substance constituting an imprint which cannot be removed exists on each of both sides of the image holding sheet, and the sheet processing means based on a detection result of the sheet surface detecting means. Sheet processing control means for controlling the operation / non-operation of the image forming material, and the sheet surface detecting means for forming the imprint on the surface of the image holding sheet relating to the preceding image forming material removal processing. Upon detecting a within and is characterized by comprising a removal processing prohibition control means for prohibiting said image forming substance removal processing for the other surface of the image holding sheet. Here, the means for making part or all of the imprint unrecognizable may be, for example, perforated at the position of the unremoved image on the image holding sheet, blurred the unremoved image, or An opaque material such as white is applied on the top.

According to a fifth aspect of the present invention, in the apparatus for removing an image forming substance from both surfaces of the image holding sheet according to the fourth aspect, after the image forming substance removing process is performed by the image forming substance removing means, the removal is completed. An image holding sheet in which the unremoved image forming substance remains only on one side, or an image holding sheet in which the image forming substance that could not be completely removed remains on both sides after the image forming substance removing process is performed by the image forming substance removing means. A storage means for storing the image holding sheet processed by the sheet processing means is provided separately from the storage means for storing the sheet.

According to a sixth aspect of the present invention, in the apparatus for removing an image-forming substance from both sides of the image-holding sheet according to the fourth aspect, the sheet processing means comprises: It is characterized in that it is configured to adhere to a part.

[0015] The invention of claim 7 is the image forming substance removing apparatus from the image holding sheet both surfaces of claims 4, 5 or 6, the upper Kizo forming substance removing device, surface made of fibrous An image forming substance stably adhering to the image holding sheet, an adhesion destabilizing means for making the state of adhesion to the surface unstable, and a peeling member for the image forming substance in the unstable state. And a peeling means for peeling off the image forming substance from the surface by contact.

[0016]

According to the first aspect of the present invention, when the image forming substance present on the image holding sheet after removing the image forming substance adhering to the surface of the image holding sheet forms a seal, All or a part of the imprint is made unrecognizable, thereby completely preventing the misuse of the image-holding sheet having the imprint remaining, or the image-holding sheet having the imprint remaining has been subjected to an image-forming substance removal process. This makes it easy to misuse this image holding sheet. In this case, without removing the image forming substance on the other side of the image holding sheet, the image holding sheet is stored, and the unnecessary image forming substance removal processing on the other side is performed. Do not do.

According to a second aspect of the present invention, in the method for removing an image forming substance from both sides of the image holding sheet according to the first aspect, the image holding sheet that has been made unrecognizable is adhered to the surface of the image holding sheet. After performing the removal of the imaging substance,
The image forming material that cannot be completely removed is stored separately from the image holding sheet remaining on only one side and the image holding sheet remaining on both sides. As a result, the image-holding sheet with the imprint remaining is distinguished from other image-holding sheets, thereby making it easier to manage misuse prevention and the like.

According to a third aspect of the present invention, in the method for removing an image forming substance from both surfaces of the image holding sheet according to the first or second aspect, the image forming material is stably adhered to the image holding sheet having a fibrous surface. The state of adhesion between the image forming substance and the surface is made unstable, and a release member is brought into contact with the image forming substance in the unstable state, and the image forming substance is peeled off from the surface to be removed. Thereby, damage to the fibrous surface of the image holding sheet due to the removal of the image forming substance is reduced.

Further, according to the present invention, before the image forming material removing means performs the image shape removing processing by the sheet surface detecting means, the image forming means which forms an imprint which cannot be completely removed by the processing. Whether or not a substance exists, or whether or not there is an image forming substance constituting an imprint that could not be completely removed by the image forming substance removal processing after the processing is performed, on both sides of the image holding sheet. Is detected. The sheet processing control unit controls the operation and non-operation of the sheet processing unit based on the detection result of the sheet surface detection unit, and detects the imprint of the image holding sheet that cannot be completely removed by the image forming substance removing process. Make all or part unrecognizable. Thereby, the misuse of the image holding sheet with the imprint is completely prevented, or the image holding sheet with the imprint is easily recognized as having been subjected to the removal processing of the image forming substance. This makes it difficult for the image holding sheet to be misused. Then, when the sheet surface detection unit detects the presence of the image forming substance forming the imprint on the surface of the image holding sheet related to the preceding image forming material removal processing, the removal processing inhibition control unit controls the removal of the image holding sheet. The image forming substance removal processing on the other side is prohibited. As a result, unnecessary image forming substance removal processing on the other surface is prevented from being performed.

According to a sixth aspect of the present invention, in the apparatus for removing an image-forming substance from both sides of the image-holding sheet according to the fourth aspect of the present invention, the image forming material having substantially the same color as the image-holding sheet is completely imprinted by the sheet processing means. Alternatively, all or part of the imprint is made unrecognizable by attaching it to a part. (Hereinafter, margin)

According to a seventh aspect of the present invention, in the apparatus for removing an image forming substance from both surfaces of the image holding sheet according to the fourth, fifth or sixth aspect, the image is formed by using an adhesion destabilizing means. After the image forming substance stably adhered on the holding sheet and the state of adhesion to the surface are made to be in an unstable state, the peeling member is brought into contact with the image forming substance in the unstable state by a peeling means. The image forming substance is peeled off from the surface.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention is applied to an image holding apparatus for removing a heat-fusible toner (hereinafter, referred to as a toner) as an image forming substance from a transfer sheet as an image holding sheet on which an image is formed by a transfer type electrophotographic copying machine. An embodiment applied to an apparatus for removing an image forming substance from a sheet (hereinafter, referred to as a toner removing apparatus) will be described.

FIG. 1 is a front view showing a schematic configuration of the toner removing device according to the first embodiment. First, an outline of the whole will be described. This toner removing device includes a paper feed unit 1 for separating and feeding one by one the transfer paper on which a toner image is formed and stored in a cassette (not shown) in a stacked state. A liquid supply unit and a toner release unit 6 for supplying a liquid to the transfer paper sent from the unit 1 and peeling and removing the toner from the transfer paper to which the liquid has been supplied, and a drying for drying the transfer paper from which the toner has been removed. A unit 4 and a paper receiving unit 5 having a plurality of paper discharge trays 501a to 501d are provided.
Further, a separation unit 40 for separating and transferring the transfer paper from the drying unit 4 to any one of the plurality of discharge trays 501a to 501d of the paper receiving unit 5 is provided, and the transfer paper is turned inside out in the apparatus. There is also formed a circulation route for circulation. Further, an identification mark providing unit 30 is provided as identification mark providing means for providing an identification mark to the transfer paper from the drying unit 4 as necessary. Hereinafter, each unit will be described in detail.

The paper feed unit 1 feeds the transfer paper loaded in a cassette (not shown) from, for example, the uppermost sheet, separates the multi-fed paper by a pair of separation rollers (not shown), and forms one transfer paper. Is sent out by a pair of registration rollers for timing adjustment and skew correction. Since the specific configuration and operation are the same as those of the paper feeding mechanism in the electrophotographic copying machine, detailed description is omitted.

The liquid applying unit and toner peeling unit 6 performs a process of removing the toner image from the transfer paper, and a paper holding drum that rotates by clamping the leading end of the transfer paper with a clamp claw 602 and holding it on the peripheral surface. 601 which supplies a liquid to the transfer paper so as to come into contact with the transfer paper on the drum 601;
07 and a peeling belt 308 as a peeling member supported by a support roller.

The coating roller 207 transfers the toner stably adhering to the surface of the transfer paper and the processing liquid as a destabilizing agent that makes the state of adhesion to the surface unstable, onto the paper holding drum 601. The processing liquid is applied to paper, and the processing liquid is supplied by the liquid supply device 208. Further, the application roller 207 is configured to be able to be separated from and brought into contact with the drum 601, and a part of the toner can be removed by the operation of separating and connecting the application roller 207. In addition, separately from the treatment liquid, a penetration enhancer as a penetration enhancer for promoting the penetration of the treatment liquid into the transfer paper is applied to the transfer paper on the drum 601 by an application roller different from the application roller. It can also be configured to do so.

Here, the treatment liquid is at least one selected from the group consisting of water, an aqueous solution containing a water-soluble polymer, an aqueous solution containing a surfactant, and an aqueous solution containing a water-soluble polymer and a surfactant. Of water or an aqueous solution can be used. In addition, the water or the aqueous solution may contain a predetermined organic solvent. Further, as the treatment liquid, only an organic solvent can be used. The permeation promoting liquid 21 is at least one kind of water or an aqueous solution selected from the group consisting of an aqueous solution containing a water-soluble polymer, an aqueous solution containing a surfactant, and an aqueous solution containing a water-soluble polymer and a surfactant. Etc. can be used.

Examples of the water-soluble polymer include starchy substances (potato starch, potato starch, tapioca starch, wheat starch, corn starch, etc.), mannan (konjac, etc.), seaweeds (funori, agar, sodium alginate, etc.), Natural polymers of plant mucilage (such as trolo-mallow, tragacanth gum, gum arabic), microbial mucilage (such as dextran and levan), proteins (such as glue, gelatin, casein, and collagen), and cellulosic (viscose, methylcellulose, ethylcellulose, etc.) Hydroxyethyl cellulose,
Examples include, but are not limited to, semi-synthetic polymers of starch (soluble starch, carboxymethyl starch, dialdehyde starch), and synthetic polymers.

Examples of the surfactant include anionic (carboxylate, sulfonate, sulfate, phosphate, phosphonate, etc.) and cationic (amine salt, quaternary). Ammonium salts, benzalkonium salts, benzethonium chloride salts, pyridinium salts, imidazolinium salts, sulfonium salts, polyethylenepolyamines, etc.), amphoteric systems (amino acids, carboxybetaines, sulfobetaines, aminosulfates, aminocarboxylates)
Imidazoline derivatives, etc.), nonionics (ether type, ether ester type, ester type, nitrogen-containing type, polyhydric alcohol, amino alcohol, polyethylene glycol, etc.)
, But not limited thereto.

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

As the organic solvent used alone,
Hexane, heptane, octane, which are hydrocarbon solvents
Nonan, Spirit, Naphtha N01-6 (trade name of Shell Petroleum), Isopar E, L, K, V (trade name of Exxon), IP Solvent (trade name of Idemitsu Petroleum), Shelsol 70, 71, Solvesso 100,1
50 (trade name of Shell Oil), Ascom OMS, 4
60 (trade name of Spirits), Vegasol 1030,
2130, 3040 (trade name of Mobile Oil Co., Ltd.) and the like. Furthermore, Fluorinert FC which is a fluorine-based solvent
40, 43, 70, 77 (trade names of Sumitomo 3M), Aflud E10, 16, 18, etc., Shin-Etsu Silicone KF96 (trade name) which is a silicone solvent, Toray Silicone SH200, 344 (trade name), Toshiba Silicone TSF
431 (trade name) and the like, but are not limited thereto.

The peeling belt 308 is for peeling and removing the toner from the transfer paper on the paper holding drum 601 to which the processing liquid has been supplied.
The toner is configured to have an adhesive force greater than the adhesive force between the transfer paper and the toner at least with respect to the softened toner. Specifically, a toner component resin that is the same as or similar to the toner described above, a component resin of an adhesive, or the like can be used, and a metal material of aluminum, copper, nickel, or iron can also be used. However, the present invention is not limited to these. The resin may be a water-soluble resin or a water-insoluble resin.

Here, examples of the toner component resin include polystyrene resin, acrylic resin, methacrylic resin, styrene-butylacrylic copolymer, styrene-butadiene copolymer, polyester resin, epoxy resin and the like. It is not limited.

The resin components of the adhesive include protein adhesives such as glue, gelatin, albumin, and casein, and carbohydrate adhesives such as starch, cellulose, and complex polysaccharides (arabic gum, tragacanth rubber, etc.). , Vinyl acetate polymers and copolymers, acrylics, ethylene copolymers, thermoplastic adhesives such as polyamides, polyesters, polyurethanes, polychloroprene, nitrile rubbers, recycled rubbers, SBRs, natural rubbers, etc. Rubber-based adhesive, rubber-based, acrylic-based pressure-sensitive adhesive, polyethylene terephthalate (PE) with titanium oxide dispersed
T), and the like, but are not limited thereto.

When such a resin is used, it is desirable to form a multilayer structure having at least two layers of a support and a surface layer from the viewpoint of prevention of elongation due to tension and heat, durability and the like. Examples of the support for supporting the resin and the like include a sheet, a cellophane tape, a kraft paper adhesive tape,
Tapes such as a polyvinyl chloride tape, an acetone tape, and a filament reinforcing tape can also be used, but are not limited thereto. Note that a roller-shaped peeling member may be used instead of the belt-shaped peeling member as in the illustrated example. In this case, a peeling member can be formed by forming a surface layer made of the above resin or the like on a base roller having elasticity, for example, as a support.

Further, among the support rollers of the peeling belt 308, the support roller 301 facing the paper holding drum 601 is provided.
A has a built-in heating lamp 301 as a toner softening means. The heating lamp 301 heats and softens the toner adhered to the transfer paper, thereby facilitating peeling of the toner from the fibers of the transfer paper. This heating is desirably performed to such an extent that the toner on the transfer paper does not melt at the pressure contact portion between the drum 601 and the belt 308. This is because if the toner is melted, it is difficult to transfer the toner on the transfer paper to the separation belt 308 without separating the toner on the paper side and the separation belt 308 side. If the heating is excessive, the peeling belt 308 and the drum 60
Transfer paper is excessively dried while passing through the pressure contact portion with the transfer paper 1, and the fixing force of the toner to the transfer paper is increased as compared with the case where the transfer paper is wet, and the transfer paper is separated by the peeling belt 308 via the toner.
May not be able to be separated from each other. Therefore, it is desirable to heat the transfer paper after passing through the heating unit to such an extent that a slight amount of moisture remains on the transfer paper to prevent the toner from re-adhering.

On the surface of the peeling belt 308,
A cleaning blade 309 for removing the toner on the surface of the peeling belt 308 is in contact with the toner collecting container 307 for collecting the toner scraped off by the blade 309.
Is also attached. Instead of using such a blade 309, a cleaning roller may be used.

Further, downstream of the peeling belt 308 in the rotation direction of the paper holding drum 601, as a detecting means for detecting an unremoved image remaining on the transfer paper held on the drum 601 after the toner peeling process. Of the CC
A D sensor 603a is provided.

The drying unit 4 is for drying the transfer paper, and includes a drying roller pair 402 made of, for example, aluminum and having a built-in heating lamp 401. At least one of the rollers 402, for example, an upper roller, may be provided with a surface layer made of a liquid-supplying member, and may be brought into contact with an aperture blade that squeezes the liquid on the surface layer. Further, instead of the drying roller pair 402, a belt-shaped member, a hot air fan, an infrared lamp, or the like may be used.

The paper receiving unit 5 includes first to fourth 4
There are provided two discharge trays 501a to 501d, and discharge rollers 502a to 502d are provided corresponding to the respective trays. The reason why the plurality of paper discharge trays are provided is to store the transfer paper after the toner removal processing separately according to the presence or absence of the unremoved image and the presence or absence of the imprint as described later.

The sorting unit 40 includes a guide plate for feeding the transfer paper from the drying unit 401 to each of the paper discharge trays 501a to 501d of the paper receiving unit 5 and the circulation path, and each of the paper discharge trays 501a to 501d. And a plurality of deflecting claws 42a to 42d corresponding to the respective trays for selectively feeding the transfer paper into the circulation path. The positions of the deflection claws 42a to 42d are controlled by, for example, solenoids 650a to 650d (see FIG. 5 ) in accordance with control data from the control unit 9 described later.

The circulation path includes a plurality of transport rollers 60 to
A switchback path 65 for turning the transfer paper upside down is formed in a part of the circulating conveyance path. Specifically, the forward / reverse transport row 66 that can rotate forward / reverse and the sorting unit 40
A switchback path 65 is formed by a driven roller 67 abutting on one roller of the pair of transport rollers 60 located immediately after, and a guide plate. This circulating path is used for the transfer paper having the toner images formed on both sides thereof, so that the toner can be automatically removed from both sides by the liquid applying unit / toner peeling unit 6 in order to automatically remove the toner from both sides. The transfer paper to which the image is applied is turned upside down and sent again to the liquid applying unit / toner peeling unit 6. The switchback path 65 is provided with a paper sensor 68 such as an optical sensor for detecting the leading and trailing edges of the transfer paper for controlling the rotation of the forward and reverse transport rollers 66. Further, a paper feed unit 1 is provided at the end of the circulation path.
A displaceable guide claw 69 is provided to use a part of the transport path from the cassette (not shown) to the paper holding drum 601 as a transport path from the circulation path to the paper holding drum 601.

The identification mark applying unit 30 serves to process the transfer paper so that the imprint which cannot be completely removed by the liquid applying unit and the toner peeling unit 6 is not misused. It is composed of a punching unit for punching a hole as an identification mark, a printing unit for printing a predetermined identification mark on transfer paper, and the like. Further, a CCD 603b for detecting the transfer paper surface on which the toner removal processing has been performed by the liquid applying unit and the toner peeling unit 6 is provided upstream of the discrimination mark applying unit 30. It is used for operation control of the unit 30 and the like.

[0044] 2 (a) and (b) are a front view and a perspective view of a punching unit which is one example of the configuration of the identification marking unit 30. The punching unit includes a movable punch body 31, a drive motor 32 controlled by the control unit 9, a feed screw 33 driven to rotate by the drive motor, and a guide rail 3 for guiding the movable punch body 31 in the direction of arrow A in the figure.
4. Transfer roller 35 for transfer paper 10, transfer guide member 3
6, a drive unit (not shown) for the transport roller 35, and the like.

The movable punch body 31 includes a cylindrical punch member 31a and a punch member 3 each having a sharp tip.
An arm 31b to which 1a is fixed, a driving unit 31d controlled by the control unit 9 and driving the punch member 31a in the vertical direction (the direction of arrow B in the drawing) via the arm 31b;
It is constituted by a punch base 31f and the like in which a hole 31e is formed at a position where the lowered punch member engages. Also,
A through hole is formed in a side wall portion of the movable punch body 31 through which the feed screw 33 penetrates. A female screw is formed on an inner peripheral surface of the through hole so as to be screwed with the feed screw 33 (male screw). Has been cut. Then, the feed screw 33 is inserted into the through hole of the movable punch body 31 where the internal thread is cut while being screwed. Accordingly, the movable punch body 31 can reciprocate in the direction of arrow A in accordance with the rotation of the feed screw 33.

In the perforation unit, the transfer paper 10 conveyed from the drying unit 4 is conveyed from the left side of the drawing onto the punch table of the movable punch body 31 and
When an unremoved image on the transfer paper 10 is detected by the D sensor 603b, the driving of the transport roller 35 is controlled so as to stop at a predetermined position obtained in advance from the punch position data. The punch position in a direction (arrow A direction) orthogonal to the transfer paper transport direction is controlled by rotating the feed screw 33 by the drive motor 35 and moving the movable punch body 31. After the control of the punch position is completed, the drive unit 31c is operated, and the punch member 31a is lowered via the arm unit 31b to punch the transfer paper 10. Here, the number of punches may be one, but a plurality of punches may be formed.

FIG. 3 is a perspective view of a printing unit which is another example of the configuration of the identification mark providing unit 30. This printing unit is an ink jet type, has a nozzle head 37 having three jet nozzles and fixed to a holder 37a, a guide rod 38 that penetrates the holder 37a and guides the movement of the nozzle head 37, and a driving unit of the nozzle head 37. 39 and the like. The driving section 39 includes a driving motor 39a, a driving pulley 39b fixed to a rotating shaft of the driving motor 39a, a driven pulley 39c, a driving wire 39c fixed to a nozzle head holder 37a and suspended between the pulleys 39b and c, and the like. Have been. By the rotation of the drive motor 39a, the drive wire 39c
The nozzle head 37 moves in a direction orthogonal to the transfer paper transport direction. Each jet nozzle of the nozzle head 37 and the drive motor 39a are connected to a driver 910 of the control unit 9.

In the printing unit, the transfer paper 10 conveyed from the drying unit 4 is conveyed in the direction of the arrow, and the nozzle head 37 is controlled by the drive motor 39a.
Is moved in a direction perpendicular to the transfer paper transport direction. Then, ON / OF of each jet nozzle of the nozzle head 37 is performed.
By controlling F at a predetermined timing, the transfer paper 1
An identification mark such as an X mark or a 〇 mark is put on the entire surface of the transfer paper 10 so that 0 becomes unusable. In this printing control, the transfer of the transfer paper 10 does not need to be stopped, but the transfer of the transfer paper 10 may be stopped at the timing of the movement of the nozzle head 37 and the printing by the jet nozzle.

The printing unit may recognize the position of the unremoved image on the transfer paper 10 and control printing so as to be performed at that position. In this case, the CCD sensor 60
Based on the position data of the unremoved image detected in 3b, movement control of the nozzle head 37 by the drive motor 39a, ON / OFF timing control of the jet nozzle, and the like are performed, and an identification mark is printed on the unremoved image. At this time,
An ink of the same color as the transfer paper 10, for example, a white ink may be used.

[0050] Further, in the configuration example of the printing unit of Figure 3,
Although configured to move in a direction perpendicular to the jet nozzle to the transfer sheet conveyance direction, as shown in FIG. 4, the nozzle head 3 arranged jet nozzles across the width of the transfer paper 10
7 may be arranged on the transfer paper 10.

In order to prevent the unremoved image of the transfer paper 10 from being recognized later by the above-described identification mark providing unit 30, a hole as an identification mark is formed or printed on the unremoved image. Can be controlled to For example, in the punching unit shown in FIG.
Based on the position data of the unremoved image detected by the CD sensor 603b, the movement control of the movable punch body 31 by the drive motor 32, the drive control of the transport roller 35, the punch member 31
The drive control of b is performed, and punching is performed on the unremoved image.
In this way, if the identification mark is provided on the unremoved image, if the transfer paper 10 is discarded by mistake, the leakage of confidential information or the transfer paper 10b on which the unremoved image such as a mark or a sign remains. Abuse (forgery / forgery) can be further prevented.

Further, a transfer paper which may be misused, in which images such as a vermilion mark and a killer seal mark remain as unremoved images,
As a method of processing so as not to be abused, it is also effective to blur stamps of stamps. As the treatment liquid for blurring the seal imprint, a hydrocarbon solvent or an acetone solvent or the like can be used for a vermilion mark, and water or alcohol can be used for a killer whale seal. In the case of a stamp using ink on a stamp stand, water, alcohol, or the like can be used. In addition, for example, when a signature made in place of or in addition to the seal is made with a ball-point pen or the like, if this remains as an unremoved image, it may be misused. As such a treatment for blurring a signature or the like (hereinafter referred to as a blank), an alcohol or acetone solvent can be used in the case of writing with a ballpoint pen, and water can be used in the case of writing with a fountain pen. Therefore, a device that supplies such a processing liquid to the transfer paper to blur the imprint may be used as the identification mark providing unit 30. Further, such a bleeding processing liquid may be supplied to the transfer paper held on the paper holding drum 601. In this case, it is desirable that the CCD 603a disposed to face the paper holding drum 601 is also used for judging the presence or absence of imprint. Further, such a bleeding treatment liquid may also be used as an agent for destabilizing the adhesion between the transfer paper surface and the toner.

Next, a control section 9 as a control means for operating the toner removing device will be described with reference to FIG. FIG. 5 is a control block diagram for operating the toner removing device of FIG. In FIG. 5, when a main switch 902 is turned on, a DC power supply voltage is supplied to each control IC from a DC power supply (PSU) 903 which receives an AC supply from a commercial power supply 901. CP
The U 904 resets a program counter or the like when the power supply is started, and starts control based on the contents of the program written in the ROM 905. The U 904 supplies a reference clock (CLK) required for CPU operation. An oscillator 906 is connected.

The CPU 904 has the address data bus 907 and the ROM 905 as well as each roller 30
The control temperature of the RAM 1a, 401a and the like are written in the RAM 91.
9, an A / D converter 918, a parallel interface 908, a serial interface 921, and the like. The A / D converter 918 includes, in addition to the CCDs 603 and 603b, the separation belt support roller 3
01a and the temperature detecting thermistors 916 and 917 of the drying roller 404 are connected. The output ports of the parallel interface 908 include a feed motor 923, a registration motor 924, and a main drive motor 9.
22, relay 9 for voltage supply to each lamp 301, 401
Eleven contact driving coils 911, lamps 301 and 401
Solid state relay SSR1 (91
2), SSR2 (913), solenoid 926 for clamp claw 602, solenoid 20 for moving application roller 207
7. A driver 910 such as a solenoid 950a-d for each of the deflection claws 42a-d is connected, and a paper end sensor 925 for detecting the presence or absence of a sheet in the cassette of the sheet feeding unit 1 is connected to an output port thereof. To the serial interface 921, a control unit 920 for the operation display unit of the toner removing device and a control unit 930 for the identification mark providing unit 30 are connected. The rotation of the peeling belt 308 and the rotation of the application roller 207 are synchronously driven by a main drive motor 922.

Next, the operation of the toner removing device will be described. Transfer paper on which images are formed on both sides can be reused as transfer paper for double-sided recording because both sides of the image are removed. Unremoved images remain on only one side, and the other side is used for image recording. There are three types: those that can be reused, and those that cannot be reused because unremoved images remain on both sides. Of these, those that have an unremoved image remaining on at least one surface are further classified into those that are highly likely to be misused, such as imprints, and those that are not. The transfer paper on which images are formed on both sides is subdivided by combining the above viewpoints as follows. An image that can be reused as transfer paper for double-sided recording with images removed on both sides Only unremoved images with little risk of misuse remain on only one side, and the other side can be reused as is Only unremoved images with low risk remain and cannot be reused as they are. Imprints with high risk of misuse remain on at least one side, and need to be treated to prevent misuse.

Therefore, in the present embodiment,
It is determined which one of the transfer papers is, and after performing a predetermined process as needed, it is stored in the four paper output trays 501a to 501d provided as described above. Further, for the above-mentioned transfer paper that requires processing such as prevention of abuse, processing such as punching holes is performed in the identification mark providing unit 30.

FIG. 5 shows an example of control for performing such an operation. First, as a device start-up operation after power-on of a device (not shown), data for turning on the relay 909 is sent from the CPU 904 to the parallel interface 908 via the address data bus 907, and the driver 910 connected to the output port of the parallel interface. , Contact drive coil 9 of relay 911
11a is energized, and the contact of the relay 911 is closed. Then, data for turning on the solid state relays SSR1 (912) and SSR2 (913) is sent to the driver 910 in the same manner as described above, and the driver 910 is turned on.
, SSR1 (912) is turned ON, a current flows to the heating lamp 301 for heating the peeling belt 308, and the heating of the roller 302 starts. Further, the driver 9
SSR2 (913) is turned ON via 10, and a current flows to the heating lamp 401 for heating the drying roller 402, and the heating of the same roller 402 is started. Each roller 30
The temperatures of 2,402 are thermistors 916, 91, respectively.
7, the data is input to the A / D converter 918 and converted from analog data to digital data. RAM
The control temperature of each roller is written in 919, and the temperature is controlled by comparing the value. The control temperature data can also be written from the control unit 920 of the operation display unit 50 to the RAM 919 through the serial interface 921. When the temperature of each of the rollers 301a and 402 reaches a temperature (set value of RAM) sufficient for peeling or drying, an operation display (LED lighting or the like) is displayed on the operation display unit via the control unit 920. .

When the operation command data is transmitted from the control unit 920 of the operation display unit in a state where the apparatus start-up operation is completed, the CPU 904 operates the main drive motor 922 to cause the paper holding drum 601, the peeling belt 308, When the application roller 207 and the like are rotated and the load of the motor 922 can be driven at a constant speed, the paper feeding motor 923 is driven to start paper feeding. The registration motor 924 rotates while timing with the paper feed motor 923 to prevent skew, and sends out the transfer paper toward the paper holding drum 601.

As shown in the figure, the transfer paper surface (hereinafter referred to as the first surface) facing upward at the stage of being sent from the paper feeding unit 1 and the transfer paper surface (hereinafter referred to as the second surface) facing downward. ) Is determined (step 1). This determination may be made by arranging an image presence / absence detection sensor so as to face each surface and making a determination using a signal from the sensor. Alternatively, the operator may input a numeric key from the operation display unit in advance. Alternatively, the determination may be made using the input signal.

First, a case where it is determined that no image exists on both sides (N in step 1), that is, a case where it is determined that an image exists on only one of the first and second surfaces will be described. In this case, it is then determined whether the image exists on the first surface (step 2). If it is determined that an image exists on the first side, the paper holding drum 601
Is transmitted to the parallel interface 908, the solenoid 926 is operated by the driver 910, and the transfer paper is clamped by the clamp claw 602.
The paper holding drum 601 is held at 2 in FIG.
Rotate. During this time, the transfer paper is coated with the processing liquid by the application roller 207, and in a state where the release liquid has permeated the interface between the transfer paper and the toner, the toner is transferred onto the transfer paper by the release belt 308 at the interface where the processing liquid has permeated. (Step 4). During this rotation, the transfer paper surface is detected by the CCD sensor 603a, and the A / D converter 9 detects the transfer paper surface.
It is determined whether an unremoved image remains using the detection data sent to the CPU 904 via the CPU 18 (step 5).

When no unremoved image remains (Y in step 5), control data for opening the clamp claw 602 is sent to the parallel interface 908, and the driver 91
At 0, the operation of the solenoid 926 is stopped, and the clamp pawl 602 is released, whereby the transfer paper is separated from the paper holding drum 601. Then, the transfer paper is dried by the drying unit 4, and the inactive identification mark attaching unit 30 is operated.
And is discharged to the first discharge tray 501a by the first deflecting claw 42a of the sorting unit 40 and stored there (step 6). If an unremoved image remains (N in step 5), a counter N for counting the number of continuous toner processes is counted up, and while determining whether the number does not exceed a predetermined number b, the toner is checked. The removal process and the check using the output of the CCD sensor 603a are repeated (steps 4, 5, 7, 8). If it is determined that no unremoved images remain during this time (Y in step 5),
Similarly, the sheet is discharged to the first sheet discharge tray 501a and stored therein.

On the other hand, when the number of times exceeds a predetermined number b while the unremoved image remains, the clamp claw 602 is opened to separate it from the paper holding drum 601, dried in the drying unit 4, and
It is determined whether or not the unremoved image is a seal by using the detection data of the CCD 603b sent to the CPU 904 via the D converter 918, for example, by determining the presence or absence of a circular or square shape (step 9). This judgment is based on the CCD 6
03a and a CCD having a sensitivity to red or a color close to red may be used in combination, and it may be determined based on the shape and color whether or not the imprint is made of vermilion. The detection data from the CCD 603b is written into the RAM 919 and is also used for controlling the identification mark providing unit 30, the sorting unit 40, and the like.

Here, when it is determined that the imprint remains (Y in step 9), the identification mark attaching unit 30
For example, punch holes, print ○, ×, etc., so as to overlap or not overlap the imprint, form a solid image so that the entire imprint is hidden, or apply special liquid After the application and smearing of the seal (step 10), the sheet is discharged to the fourth discharge tray 501d by the fourth deflecting claw 42d of the sorting unit 40 and stored there (step 29).

Conversely, when it is determined that no imprint remains, the sheet is passed through the inactive identification mark providing unit 30 and is discharged to the second discharge tray 501b by the second deflecting claw 42b of the separation unit 40. Let this be kept. Here, the first surface of the second discharge tray 501b on which the unremoved image of the transfer paper remains remains upward.

The above is the processing in the case where the image exists only on the first side of the transfer paper. However, when it is determined in step 2 that the image exists only on the second side (N in step 2), Immediately after this determination, the paper holding drum 601 is passed through the inactive drying unit 4, the identification mark applying unit 30, and the separation unit 40 without being held by the paper holding drum 601, and is turned upside down in the circulation path. The same operation is performed except that the data is held. That is,
If the image on the second side of the transfer sheet can be removed, the transfer sheet is stored in the first paper discharge tray 501a, and the image on the second side is removed by repeating the toner removal process within a predetermined number of times. When the unremoved image remains because it cannot be performed and the image includes an imprint, the identification mark providing unit 30 performs a predetermined process and stores the image in the fourth paper output tray 501d.
Further, when the toner removal process is repeated within a predetermined number of times, the image on the second surface cannot be removed, an unremoved image remains, and when the image does not include a seal, if the image does not include an imprint, the image is stored in the second discharge tray 501b. Let it be kept. The transfer paper having the unremoved image remaining on the second surface also faces upward on the second discharge tray 501b.

Next, the case where it is determined in step 1 that images exist on both sides (Y in step 1) will be described. In this case, first, the toner removal processing for the first surface is started (step 12). The toner removal processing for the first surface is also performed within a range not exceeding a predetermined number b (steps 13, 19, 20, and 12). If the image on the first surface can be removed (Y in step 13), The second surface toner removal process is started (steps 14, 30, 15, 1).
6, 17). When the toner removal processing of the second surface is started, the clamp pawl 602 is once opened to separate the transfer paper from the paper holding drum 601 and pass through the drying unit 4, the identification mark providing unit 30, and the separation unit 40 in the inactive state. And then flip it over in the circulation path (step 14)
Next, the toner removal processing is performed within a range that does not exceed the predetermined number b by being held on the paper holding drum 601 (steps 30 and 1).
5, 16, 17).

When the image on the second surface can be removed by the toner removal processing on the second surface (Y in step 15), the transfer paper is separated from the paper holding drum 601 by opening the clamp claws 602, and The paper is dried in the drying unit 4, passed through the inactive identification mark providing unit 30, and is moved by the first deflecting claw 42 a of the sorting unit 40 to the first discharge tray 50.
The sheet is discharged to 1a and stored therein (step 6).

On the other hand, by repeating the toner removal processing on the second surface within a range not exceeding a predetermined number of times, the image on the second surface cannot be removed and an unremoved image remains (N in step 17). When the image includes an imprint (Y in step 18), the identification mark providing unit 30 is operated in the same manner as in step 10 described above to perform a predetermined process (step 10). The sheet is discharged to the fourth discharge tray 501d by the deflecting claw 42d and stored in the fourth discharge tray 501d (step 29). Further, in the repetition of the toner removal processing for the second surface within a range not exceeding the predetermined number, the image on the second surface cannot be removed, and the unremoved image remains (N in step 17), and the image is imprinted. Is not included (N in step 18), the identification mark attaching unit 30 in the inactive state is passed through, and the classification unit 40
The sheet is discharged to the second sheet discharge tray 501b by the second deflection claw 42b, and stored there. Here, the second discharge tray 50
The second surface of the transfer paper 1b where the unremoved image of the transfer paper remains remains upward.

In the repetition of the toner removal processing on the first surface within a range not exceeding a predetermined number, the image on the first surface cannot be removed and an unremoved image remains (N in step 26).
In some cases, whether or not the second surface is in the toner removal process is determined depending on whether or not the unremoved image includes a seal. That is, when the image includes a seal (Y in step 27), the identification mark providing unit 30 is operated in the same manner as in step 10 described above without performing the toner removal processing on the second surface, and the predetermined processing is performed. After that (Step 10), the sheet is discharged to the fourth discharge tray 501d by the fourth deflecting claw 42d of the sorting unit 40 and stored there (Step 29).

Conversely, when the image does not include a seal,
Once the clamp pawl 602 is opened, the transfer paper is
After passing through the drying unit 4, the identification mark applying unit 30, and the separation unit 40 in an inactive state, and are turned upside down in a circulation path (step 22),
The toner removal process is performed on the second surface where the toner is removed by the paper holding drum 601 and the toner removal process is performed within the predetermined number b (steps 23, 24, 25, and 26).

When the image on the second side can be removed by the toner removal processing on the second side (Y in step 24), the transfer paper is separated from the paper holding drum 601 by opening the clamp claws 602, and the drying unit 4 and passes through the inactive identification mark imparting unit 30 and the second discharge tray 5 by the second deflecting claw 42b of the sorting unit 40.
01b and stored in the storage device (step 1).
1).

Since the transfer sheet has an unremoved image only on the first surface, if the image is discharged to the second discharge tray 501b as it is after the toner processing on the second surface, the unremoved image remains. The first surface faces downward on the tray 501b. In this case, the image exists only on one side of the above-described transfer paper, and the image cannot be completely removed, and only the transfer paper stored in the tray 501b or the image on the second side of the two-sided image is removed. Because the transfer paper stored in the tray 501b is not completely removed, the direction of the unremoved image is reversed, and it is necessary to manually align the reusable surface when reusing. Therefore, in order to save such labor, it is desirable to turn the transfer paper upside down before discharging the transfer paper in this case to the second discharge tray 501b. For example, before the sheet is discharged to the tray 501b, the sheet is passed through the sorting unit 40 and the circulation path, turned over, and then discharged to the sheet discharge tray 501b. Of course, the image is present only on one side of the above-mentioned transfer paper, and the image cannot be completely removed, so that the surface of the unremoved image is aligned downward on the paper discharge tray 501b. The tray 501b
When the transfer paper stored in the tray 501b is ejected without completely removing the transfer paper stored in the tray 501 or the image on the second side of the two-sided image, the transfer paper may be reversed. .

On the other hand, by repeating the toner removal processing on the second surface within a range not exceeding a predetermined number of times, the image on the second surface cannot be removed and an unremoved image remains (N in step 26). When the image includes an imprint (Y in step 27), the identification mark providing unit 30 is operated in the same manner as in step 10 described above, and after performing a predetermined process (step 10), the fourth classification of the classification unit 40 is performed. The sheet is discharged to the fourth discharge tray 501d by the deflecting claw 42d and stored in the fourth discharge tray 501d (step 29). Further, in the repetition of the toner removal processing for the second surface within a range not exceeding the predetermined number, the image on the second surface cannot be removed, and the unremoved image remains (N in step 26), and the image is imprinted. Is not included (N in step 27), the identification mark attaching unit 30 in the inactive state is passed, and the classification unit 40
The sheet is discharged to the third discharge tray 501c by the third deflection claw 42c, and is stored in the third discharge tray 501c.

The above operation is performed by the paper end sensor 925 for detecting the presence or absence of paper in the paper feed unit 1.
Data without paper from the parallel interface 90
8 until the CPU 904 detects that there is no paper, and stops the machine operation.
An operation stop display (LED lighting or the like) is displayed on the operation display unit 50 via the control unit 920.

According to the present embodiment, the paper holding drum 60
After the toner is removed from only one surface on the surface 1, the toner is passed through the separation unit 40 and the circulating path, and the liquid applying unit / toner peeling unit 6 is again turned upside down.
, The toner removal processing can be performed on both sides.

According to the present embodiment, the circulation path for turning the transfer paper upside down is provided in the toner removing device.
Images can be removed from both sides of the transfer paper. (Hereinafter, a margin) The transfer paper whose only one side can be reused by the toner removal processing is stored in the second discharge tray 501b,
Transfer paper that has an unremoved image on both sides and cannot be reused on either side is stored separately in the third paper discharge tray 501c, so that it is not necessary to manually separate the two. . Therefore, the former transfer paper can be easily reused as compared with the case where both are stored together.
In addition, the transfer paper whose only one side is reusable
Since the unremoved image is always stored in the same direction when storing it in the paper discharge tray 501b, it is not necessary to manually align the reusable surface while reversing the front and back sides when reusing the image. Easy to use. Further, since the sheet is stored with the one side facing upward, the tray 50
1b with the device removed as needed
From above, what the unremoved image looks like can be easily confirmed. Further, in the case where the unremoved image is a seal, predetermined processing is performed on the transfer paper by the identification mark providing unit 30, so that misuse of the transfer paper on which the seal is left can be prevented.

If an imprint that cannot be completely removed remains on the surface of the transfer paper having images on both sides where the toner removal processing was first performed, the transfer paper is removed without performing the toner processing on the other side. Since the storage is performed, the processing time for the transfer paper that should not be reused can be reduced as compared with the case where the toner processing is performed on both sides. Further, the transfer paper having the imprints that cannot be completely removed remains on the fourth paper ejection tray 501d, and the transfer paper having only the imprints other than the imprints remaining on one side remains on the second paper ejection tray 501b. The transfer paper on which an unremoved image other than the imprint that cannot be completely removed remains on the third discharge tray 501c.
So, each is stored in a separate tray,
This eliminates the need for manual sorting for subsequent processing, such as whether re-use is possible or whether cutting is necessary for confidentiality.

Further, according to this embodiment, the liquid is supplied to the transfer paper to which the toner has adhered, and the toner is peeled off in a state where the liquid permeates the interface of the transfer paper with the toner, thereby damaging the paper fibers. Without removing the toner.

In the above embodiment, when a seal is included in the unremoved image, the seal may be painted in the same color as the transfer paper so that the surface having the seal can be reused. For this purpose, a means for detecting the color of the transfer paper and a printing unit provided with, for example, an ink jet nozzle for filling a seal with a color similar to the detected color among a plurality of inks which have been prepared in advance are used. I do.

In the above embodiment, only the determination as to whether or not an unremoved image contains a seal is made. Alternatively, or in addition to this, handwritten characters using a writing implement such as a felt-tip pen may be used. May be determined, and the storage location may be changed depending on the result. Whether or not such handwritten characters are included can be determined based on whether or not the unremoved image exists only in a part of the entire transfer paper. This is because handwriting is almost always performed on only a part of the entire transfer paper, while copying by an electrophotographic copier or the like is almost always recorded on the entire transfer paper. It was used.

For this purpose, for example, the output of the CCD 603b for detecting the transfer paper surface after the toner removal processing in FIG. 1 is used, and handwriting is performed based on whether or not the unremoved image is unevenly distributed only in a part of the entire transfer paper. It is determined whether or not to write. FIG. 7 is a flowchart showing an example of such control. In this example, for a transfer sheet in which an unremoved image including no imprint remains only on one side, whether or not the unremoved image is handwritten is written. Is determined (step 31). And if it is not handwritten,
That is, when the image is an image obtained by a normal electrophotographic copying machine or the like, the image is stored in the second paper output tray 501b, and when the image is handwritten, the image is separately stored from the first to fourth paper output trays 501a to 501d. It is stored in a provided fourth discharge tray (not shown). The other points are the same as the control of FIG.

According to the control for determining whether or not the writing is performed by handwriting, it is difficult to completely eliminate the unremoved image even if the toner removing process is repeated many times depending on the method of removing the toner such as a pencil. Transfer paper, and the number of continuous peeling treatments is limited to prevent excessive damage to the fibers of the transfer paper as in each of the above-described embodiments, so that only unremoved images remain. The transfer paper on which the unremoved image formed by the photographic method remains can be stored separately. Therefore, in the case where the latter transfer paper is set again in the paper feed cassette of the toner removing device and the toner removing process is performed in preparation for the fact that the paper fibers are slightly damaged, manual sorting of both is not required. . In addition, distribution materials for important meetings are often created using an electrophotographic copier or the like, and transfer paper with unremoved images is subjected to such processing as cutting such highly confidential ones. Above,
This eliminates the need for manual sorting between transfer paper that only has handwritten notes left. Further, according to this control, the transfer paper on which the unremoved image which is neither the handwritten nor the imprint remains on one surface only, and the unremoved image on which the handwritten writing remains on only one surface remains. The transfer paper that has not been removed on both sides is transferred to the third discharge tray 5.
Since the storage is performed in separate trays such as 01c, manual sorting for performing subsequent processing such as reusability or necessity of cutting for confidentiality can be eliminated.

Since the transfer paper stored in the fifth paper discharge tray may contain such a highly confidential paper, a shredding machine (shredder) may be used in the toner removing device. Alternatively, a transfer paper transport path from the toner removing device to the cutter may be formed, and the transfer paper may be cut by the cutter without being stored in the fifth discharge tray.

Further, in the above embodiment, the transfer paper surface after the toner removal processing separated from the paper holding drum 601 is detected by the CCD 603b, and the presence or absence of the imprint is determined using the data from this. The presence or absence of an imprint is detected by using data from the CCD 603a or the like that detects the transfer paper surface on the holding drum 601, and the data on the transfer paper before the toner removal processing is detected is used to detect the presence or absence of an image on the transfer paper surface. It may be determined whether or not includes a seal imprint.

[0085]

According to the first, fourth and sixth aspects of the present invention, all or a part of the imprint is made unrecognizable, so that abuse of the image holding sheet on which the imprint remains is completely prevented or the imprint remains. It is possible to easily recognize that the image-bearing sheet has been subjected to the removal process of the image-forming substance, thereby making it difficult to abuse the image-bearing sheet. Can be. If an imprint remains on one surface, the image-bearing sheet is stored without storing the image-forming substance on the other surface of the image-bearing sheet without removing the image-forming substance. Since the unnecessary image forming substance removal processing is not performed, the image forming substance removal processing for reusing the image holding sheet can be efficiently performed. In particular, according to the invention of claim 6, it can be automatically performed by the device.

According to the second and fifth aspects of the present invention, the unrecognizable image-holding sheet cannot be completely removed after removing the image-forming substance attached to the surface of the image-holding sheet. The image-bearing sheet is stored separately from the image-bearing sheet that remains on one side only and the image-bearing sheet that remains on both sides. Management of prevention can be further facilitated. In particular, according to the invention of claim 5, it can be automatically performed by the device.

According to the third and seventh aspects of the present invention, the image forming substance stably adhered to the image holding sheet having a fibrous surface and the state of adhesion to the surface are unstable. State, the peeling member is brought into contact with the image forming material in the unstable state, and the image forming material is peeled off from the surface and removed, so that the fibrous surface of the image holding sheet accompanying the removal of the image forming material is damaged. Can be reduced. Therefore, the number of times of reusing the image holding sheet can be increased, and the resources can be more effectively used.

[Brief description of the drawings]

FIG. 1 is a front view illustrating a schematic configuration of a toner removing device according to an embodiment.

FIG. 2A is a front view of a perforation unit used in the toner removing device. (B) is a perspective view of the perforation unit.

FIG. 3 is a perspective view of a printing unit used in the toner removing device.

FIG. 4 is a perspective view of a printing unit according to a modification.

FIG. 5 is a block diagram of an electrical unit of the toner removing device.

FIG. 6 is a flowchart of control of the toner removing device.

FIG. 7 is a flowchart of the control according to a modification.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 paper feeding unit 4 drying unit 5 paper receiving unit 6 liquid applying unit and toner peeling unit 30 identification mark applying unit 40 sorting unit 42 deflection claw

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03G 21/00 570-578 B41J 29/26-29/373

Claims (7)

(57) [Claims] 1. A method for removing an image-forming substance from both sides of an image-holding sheet, wherein the image-forming substance present on the image-holding sheet forms an imprint after removing the image-forming substance adhering to the surface of the image-holding sheet. If so, it is necessary to make all or a part of the imprint unrecognizable, and to store the image holding sheet without removing the image forming substance on the other surface of the image holding sheet. A method for removing an image forming substance from both sides of an image holding sheet. 2. An image holding apparatus wherein an image forming substance which cannot be completely removed after the image forming substance adhering to the surface of the image holding sheet is removed remains on only one of the front and back surfaces. 2. The image holding sheet according to claim 1, wherein the sheet and the image forming material that cannot be removed are stored separately from the image holding sheet remaining on the front and back surfaces. Image forming substance removal method. 3. An image-forming substance stably adhering to an image holding sheet having a surface made of fibrous material, and an image stabilizing state of adhering to said surface, said image being in an unstable state. 3. The method for removing an image forming substance from both surfaces of an image holding sheet according to claim 1, wherein a releasing member is brought into contact with the forming substance, and the image forming substance is removed from the surface by peeling. 4. Image formation adhering to the surface of an image holding sheet
Image forming substance removing means for removing the substance, sheet processing means for making all or a part of the imprint made of the image forming substance present on the image holding sheet unrecognizable, and removing the image forming substance by the image forming substance removing means. Before the processing is performed, it is detected in advance whether or not there is an image forming substance constituting an imprint that cannot be completely removed by the processing, or the image forming substance is completely removed by the processing after the processing is performed. A sheet surface detecting means for detecting whether or not the image forming substance constituting the imprint is present on both sides of the image holding sheet, based on a detection result of the sheet surface detecting means, Sheet processing control means for controlling operation / non-operation, and an image forming material wherein the sheet surface detecting means forms an imprint on a surface of the image holding sheet relating to the preceding image forming material removal processing. An image forming material removing device for removing the image forming material from both sides of the image holding sheet provided with a removal processing inhibition control unit for inhibiting the image forming material removal processing on the other surface of the image holding sheet when the presence is detected. . 5. After the image forming substance removal process is performed by the image forming substance removing device, by image holding sheet and said image forming substance removing means for image forming substance that can not be removed is left only on one side After the image forming substance removal processing is performed,
A storage means for storing an image holding sheet processed by said sheet processing means, separately from a storage means for storing an image holding sheet in which the image forming material that has not been completely removed remains on both sides. Item 4. An apparatus for removing an image forming substance from both sides of the image holding sheet according to Item 4. 6. The image processing apparatus according to claim 4, wherein said sheet processing means is configured to cause an image forming substance having substantially the same color as the image holding sheet to adhere to all or a part of the imprint. Image forming substance removal device. 7. The upper Kizo forming substance removing device, an image forming substance surface is adhered stably onto the image holding sheet made of a fibrous, the state of adhesion of the surface in an unstable state And a peeling means for bringing a peeling member into contact with the image forming material in the unstable state and peeling and removing the image forming material from the surface. An apparatus for removing an image forming substance from both sides of an image holding sheet of 4, 5 or 6.