JPH0572946A - Cleaning device and printing machine - Google Patents

Abstract

PURPOSE:To surety separate a print from an adhesive roller, to prevent the print from being wound around the adhesive roller and to eliminate the blocking and jamming of a paper by inserting a peeling member for separating the print from the adhesive roller in a groove which is molded on the surface of the adhesive roller in the circumferential direction. CONSTITUTION:The surface of an adhesive roller 11 is coated with thermofusing resin 12 which is made to be in an adhesive state by heating, and plural grooves 15 are molded on the surface in the circumferential direction at nearly equal intervals, and a peeling member 14 for separating the print from the adhesive roller 11 is inserted in the part of the groove 15 between the adhesive roller 11 and non-adhesive roller 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for reusing printed paper by removing ink from the paper that has been printed once. The present invention also relates to a printing machine incorporating this cleaning device.

[0002]

2. Description of the Related Art In recent years, the consumption of printer paper and copying paper has rapidly increased due to OA and FA in companies, offices, factories, etc. There are problems such as rising prices of paper and timber due to balance changes and deterioration of the global environment due to overcutting of forests.

Conventionally, as a reuse of paper, once used paper is melted again into pulp to remove ink and impurities, and bleached to obtain bleached pulp, and then paper is made again to produce recycled paper. There was no choice but to reuse it as recycled paper.

However, recently, a cleaning method has been proposed (Japanese Patent Application No. 63-128946) for easily removing the character image on the paper once printed. According to this method, it is possible to obtain a printed matter similar to the conventional one by using an eraserable paper having a release treatment on the surface of the paper and printing with ink on the surface of the paper, in order to clean the printed paper, By covering the surface of the printed matter with a heat-melting material (cleaning material) that is in a molten state and then cooling it, the ink printed on the character image, etc. adheres to the heat-melting material and removes the ink from the paper. The paper can be reused.

Further, as another method, there is proposed a method of cleaning by simply passing an erasable paper between a roller provided with a molten resin in a molten state on its surface and a non-adhesive roller without cooling. Teori (Japanese Patent Application 2-
No. 212837), which allows cleaning of paper with a simpler device.

[0006] A feature of these methods is that the release-treated paper can be reused several hundred times, and that the printing ink material is a heat-melting material and is the same material as the cleaning material Can be used hundreds of times. Therefore, the consumption of the paper itself is reduced, which is very economical and can contribute to resource saving. In particular, in the latter method, since the cleaning can be performed by simply passing the paper between the two roller pairs, the troublesomeness of the work can be eliminated.

[0007]

However, in the conventional method, since the heat-meltable resin in a molten state is brought into pressure contact with the erasable paper, the paper and the heat-meltable resin come into close contact with each other. It is very difficult to peel it off, and if the leading edge of the paper is not caught, the paper will be caught in the machine while it is in close contact, and paper jams will occur frequently.

In order to solve the above problems, it is an object of the present invention to provide a cleaning device capable of reliably separating a sheet and a heat-fusible resin, and a printing machine incorporating this cleaning device. The purpose is to provide.

[0009]

To achieve the above object, the cleaning device of the present invention heats a printed matter printed with hot-melt ink on an erasable paper whose surface is subjected to a release treatment. A cleaning device for removing the heat-melting ink from the printed matter by bringing the heat-melting resin in an adhesive state into contact with the pressure-sensitive adhesive roller, the pressure-sensitive adhesive roller having the heat-melting resin adhered to at least the surface thereof, and the pressure-sensitive adhesive roller. A non-adhesive roller for contacting the printed matter, and a peeling member for separating the printed matter and the adhesive roller is inserted in a circumferential groove formed on the surface of the adhesive roller. It is characterized by

Further, in the cleaning device of the present invention, the heat-meltable resin which is in an adhesive state by heating is brought into contact with the printed matter printed on the erasable paper having the surface subjected to the release treatment with the heat-meltable ink. A cleaning device for removing the hot-melt ink from the printed matter, comprising a pressure-sensitive adhesive roller having a surface coated with the hot-melt resin and a non-sticky roller for bringing the printed matter into contact with the pressure-sensitive adhesive roller. Two or more pairs of rollers are provided,
Further, a peeling member for separating the printed matter and the adhesive roller is inserted in a circumferential groove formed on the surface of the adhesive roller, and a groove portion of each adhesive roller when viewed from the printed matter feeding direction. Each roller pair is arranged so that the flat portions of the other adhesive rollers overlap.

Further, the printing machine of the present invention is a printing machine which obtains a printed matter by exposing a pre-charged photoreceptor to form a latent image, adhering toner to it, and then transferring it to a printing medium and thermally fixing it. In, in respect of the printed matter printed with the heat-fusible ink on the erasable paper whose surface has been subjected to the release treatment, the hot-melting resin is brought into contact with the hot-melt resin which is in an adhesive state by heating, so that A cleaning device for removing ink, comprising: an adhesive roller having at least its surface coated with the hot-melt resin and a non-adhesive roller for bringing the printed matter into contact with the adhesive roller, and formed on the surface of the adhesive roller. A cleaning device in which a peeling member for separating the printed matter and the adhesive roller is inserted into the circumferential groove formed is provided as the printed matter. Characterized by using the erasable paper that has passed through the cleaning device.

Further, the printing machine of the present invention is a printing machine which obtains a printed matter by exposing a pre-charged photoreceptor to form a latent image, attaching toner to it, and then transferring it to a printing medium and thermally fixing it. In, in respect of the printed matter printed with the heat-fusible ink on the erasable paper whose surface has been subjected to the release treatment, the hot-melting resin is brought into contact with the hot-melt resin which is in an adhesive state by heating, so that A cleaning device for removing ink, comprising: an adhesive roller having at least its surface coated with the hot-melt resin and a non-adhesive roller for bringing the printed matter into contact with the adhesive roller, and formed on the surface of the adhesive roller. A cleaning device in which a peeling member for separating the printed matter and the adhesive roller is inserted in the circumferential groove is provided, and the printed matter is thermally fixed. Wherein the sent to the cleaning apparatus after it has been.

In the above structure, the peeling member is preferably a flexible wire.

[0014]

According to the above construction, in the cleaning device of the present invention, the circumferential groove is formed on the surface of the adhesive roller coated with the heat-fusible resin, and the printed matter is provided in the groove between the adhesive roller and the non-adhesive roller. Since the peeling member for separating the adhesive roller and the adhesive roller is inserted, even if the printed matter and the adhesive roller once come into close contact with each other, when the printed matter is fed by the rotation of the roller, the leading end portion of the printed matter is captured by the peeling member. As a result, it is possible to surely separate the adhesive rollers so that they are sequentially peeled off.

Further, there are provided two or more pairs of rollers including an adhesive roller and a non-adhesive roller for performing the cleaning as described above, and the position of the groove in which the peeling member is inserted is the adhesive roller as seen from the printed material feeding direction. By arranging each roller pair so that the groove portion and the flat portion of another adhesive roller overlap, the heat-melting resin is not applied to the groove of the adhesive roller in the roller pair in the preceding stage of the printed material feeding. The uncleaned portion of the printed matter caused thereby can be entirely cleaned by the flat portion of the adhesive roller in the roller pair in the subsequent stage, that is, the portion in which the groove is not formed.

Further, the printing machine of the present invention is a so-called electronic device that obtains a printed matter by exposing a pre-charged photoreceptor to form a latent image, adhering toner to it, and then transferring it to a printed matter and thermally fixing it. A photographic printing machine is equipped with the above-mentioned cleaning device, and by using the erasable paper that has passed through this cleaning device as the material to be printed, the printed paper can be reused in the same procedure as a conventional copier or laser printer. Can be printed.

Further, in such an electrophotographic printer, the above-mentioned cleaning device is provided after the heat fixing device so that the unprinted surface of the substrate is printed first and the opposite surface is cleaned. It becomes possible. In addition, the printed material is sent to the cleaning device in a state where the temperature of the printed material is increased by heat fixing, and the time until the heat-meltable ink is melted can be shortened.

Further, in the cleaning device or the printing machine according to the present invention, since the peeling member is a flexible wire, when the tip of the printed matter is captured by the peeling member and the printed matter and the adhesive roller are separated from each other. The force exerted by the peeling member on the printed matter becomes elastic, and damage or scratches on the printed matter can be prevented.

[0019]

Embodiments of the cleaning device and the printing machine according to the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view of an embodiment of the cleaning device according to the present invention, and FIG. 1a is a front view thereof, and FIG.
b is a side view thereof. The surface of the adhesive roller 11 is coated with a heat-melting resin 12 which is brought into an adhesive state by heating, and a plurality of circumferential grooves 15 are formed at substantially equal intervals. The non-adhesive roller 13 holds the printed matter with the adhesive roller 11 and rotates by a roller drive system (not shown) to feed the printed matter, so that one side of the printed matter comes into contact with the adhesive roller 11 over the entire surface. Is installed in.

In the groove 15 between the adhesive roller 11 and the non-adhesive roller 13, a peeling member 14 for separating the printed matter and the adhesive roller 11 is inserted. In order to heat the hot-melt ink adhered to the printed matter and to heat the hot-melt resin 12 adhered to the adhesive roller 11, the adhesive roller 11, the non-adhesive roller 13 or both rollers are provided with a halogen lamp or an electric heater. Install a heating device such as.

Next, the operation of this cleaning device will be described. When the adhesive roller 11 whose surface is in an adhesive state due to heating is rotated clockwise, for example, the non-adhesive roller 1
3 rotates counterclockwise. In this state, from the left side, between the non-adhesive roller 13 and the peeling member 14, the printed surface printed on the erasable paper whose surface has been subjected to the release treatment with the hot-melt ink is printed on the printed surface and the adhesive roller 11. Insert so that they touch. Adhesive roller 11 and non-adhesive roller 1
At the contact portion with 3, the printed matter adheres firmly to the adhesive roller 11, but as the roller rotates, it is sequentially peeled from the adhesive roller 11 by the peeling member 14, and
The hot-melt ink on the printed matter is transferred to the adhesive roller 11 to be removed from the printed matter and cleaned. Groove 1
When there is no ink in the portion that hits 5, the cleaning is completed by one operation, but when there is ink in the portion that hits the groove 15, the ink remains in a striped pattern on the erasable paper. Therefore, in order to remove the remaining ink, when inserting it between the non-adhesive roller 13 and the peeling member 14, it is made different from the position of the previous groove,
By passing through the cleaning device again, the entire surface can be completely cleaned.

In addition, two or more cleaning devices shown in FIG. 1 are connected in cascade, and a portion corresponding to a groove position where the cleaning device of the preceding stage could not be cleaned,
By setting the cleaning device in the subsequent stage to perform cleaning, the printed matter can be completely cleaned in one pass.

The cleaning device of the present invention can be easily obtained by using, as the peeling member 14, a rigid member such as a rod or a plate made of metal or plastic. However, since the rigid member cannot reduce the fluctuation of the peeling force, the erasable paper tends to be easily scratched. Therefore, it is preferable to use a flexible wire as the peeling member 14. Since the fluctuation of the peeling force can be alleviated by adjusting the tension of the wire, it is possible to prevent the eraseable paper from being scratched. .. In addition, in order to reduce the uncleaned portion, it is preferable to reduce the groove width of the adhesive roller and insert a thin peeling member, and in particular, insert a wire formed by twisting a thin and strong metal yarn. Preferably.

Further, the peeling member 14 may be provided with a mechanism which moves with the rotation of the roller. For example, a flexible wire is formed in a ring shape to form the adhesive roller 1.
By inserting the groove into the groove so as to surround 2, the peeling member 14 can move with the rotation of the roller and smoothly separate the printed matter and the adhesive roller 12.

FIG. 2 is a schematic side view of an embodiment of the printing machine according to the present invention. In the present embodiment, a printer incorporating the above-mentioned multi-stage cleaning device having two cleaning units will be described, but it is of course possible to incorporate a cleaning device having three or more stages.

The multi-stage cleaning device 21 is formed by connecting the cleaning devices 23 shown in FIG. 1 in two stages. First
The peeling member 24 of the cleaning device of the second stage and the peeling member 24 of the cleaning device of the second stage are arranged in a comb shape, and this state is shown in FIG. The positions of the grooves are set so that the ink remaining on the first stage is complementarily cleaned on the second stage.

To explain the cleaning operation, the printed erasable paper stored in the cassette 25 is inserted from the right side of the drawing, and the multi-stage cleaning device 2
By passing 1, the toner which is the printing ink is peeled off and the erasable paper is cleaned.

The printing unit 22 is similar to a conventionally known copying machine using an indirect electrophotographic system. That is, first, the surface of the photoconductor 33 is charged by the charging device 30, and then the image of the document placed on the document table 27 is imaged on the surface of the photoconductor 33 by the lens system 28 and exposed for a predetermined time.
The latent image formed by exposure is developed by the developing device 26 to form a toner image on the surface of the photoconductor 33. After the toner image is transferred onto the sheet by using the transfer charging device 29, the fixing device 32 heat-melts the toner and press-bonds the sheet. On the other hand, the toner remaining on the surface of the photoconductor 33 is removed by the cleaning blade 31 to prepare for the next printing, and one cycle of the copying process ends.

In the above, the multi-stage cleaning device 21
An example of the printing machine provided in front of the electrophotographic recording system has been described. Next, a printing machine in which the multi-stage cleaning device 21 is provided after the fixing device will be described.

In the case of printing on the erasable paper which has been subjected to the release treatment on both sides and printed on only one side, the unprinted side is directed to the photoconductor 33 side and the printed side is printed downward, and the printing is performed after the fixing device. The old printing surface can be cleaned by passing through the multi-stage cleaning device 21. According to this configuration, the heat applied at the time of fixing can be used as preheat, so that the electric energy for cleaning can be saved.

Although a copying machine is used as the printing unit 22 in the above description, a laser beam scans the surface of the photoconductor to form a latent image instead of forming an image of the original on the photoconductor. The present invention is also applied to printers and the like. Similar to a copying machine, a cleaning device is placed before paper feeding of a laser printer to supply used eraseable paper, so that a printer in which paper resources are saved can be obtained.

The printing process of the printing machine according to the present invention is
Since it is no different from a conventional electrophotographic copying machine or laser printer, plain paper and erasable paper can be mixed. In that case, when printing on plain paper, it is preferable to provide a mechanism that does not allow the cleaning device to pass through. That is, a mechanism in which a paper feed section dedicated to plain paper is provided in addition to the cleaning device portion, and a single entrance to the paper feed section is provided. Even if there is plain paper, it is preferable to automatically recognize the plain paper and the erasable paper, and to provide a mechanism for passing the bypass path of the cleaning device when the plain paper is used.

Next, specific examples of the cleaning device and the printing machine according to the present invention will be described. (Example 1) A release paper (manufactured by Lintec Co., Ltd.) was used as the erasable paper and was copied by a copying machine (trade name "FC-5", manufactured by Canon Inc.). It fixed with a strength that could not be removed by rubbing.

Next, as a non-adhesive roller, a heat roller made of iron coated with a fluororesin was used, and as an adhesive roller, a heat-melting resin having a softening temperature of about 100.degree.
# 80 "manufactured by Toray Industries, Inc.) was used to manufacture a cleaning device as shown in FIG.

Then, the surface temperature of the non-adhesive roller is set to 110.
Rotate while maintaining at ℃, insert the erasable paper between the non-adhesive roller and the adhesive roller so that the toner surface comes into contact with the adhesive roller, and feed it at a speed of 5 cm / sec. Except for the groove part
The toner on the erasable paper could be stripped off cleanly.

(Embodiment 2) As an erasable paper,
Copying was performed in the same manner as in Example 1 using release paper (manufactured by Lintec). The fixing strength was better than that of Example 1. The same cleaning devices as in Example 1 were connected in two stages, and the peeling members were arranged so as to be displaced in a comb shape. Keep the surface temperature of the non-adhesive roller at 130 ° C and keep the roller peripheral speed at 10
The erasable paper was fed between the peeling member and the non-adhesive roller by rotating so as to be cm / sec.

As a result, the toner fixed on the erasable paper was completely cleaned. Further, even if the surface of the pressure-sensitive adhesive roller was covered with toner after cleaning was repeated many times, the cleaning performance was not deteriorated.

The respective embodiments described above are merely examples, and there are many embodiments embodying the present invention. For example, a multi-stage cleaning device that removes hot-melt ink on a sheet that has been subjected to a mold release treatment with a resin that becomes tacky when heated is
Use a non-adhesive roller as one heat roller and 1 around it
Individual or multiple adhesive rollers may be arranged. Alternatively, preheating may be used instead of direct heating.

[0040]

As described above in detail, according to the cleaning device of the present invention, the printed matter and the adhesive roller can be reliably separated from each other, so that the printed matter is prevented from being caught by the adhesive roller, and paper jams and paper jams occur frequently. It can be resolved.

Further, by using the cleaning device of the present invention, which is characterized in that two or more roller pairs including the adhesive roller and the non-adhesive roller are provided, and the groove portions of the respective adhesive rollers do not overlap, the printed matter is not printed. The cleaning portion does not occur, and the entire surface can be cleaned by one operation, and labor can be saved.

Further, according to the printing machine of the present invention, the printed paper can be reused and printed by the same procedure as that of the conventional copying machine or laser printer, and the paper resource can be saved. ..

Further, according to the printing machine of the present invention, in which the cleaning device is provided after the heat fixing device, the time until the heat-meltable ink is melted can be shortened, and the cleaning speed can be shortened. It is possible to save energy for cleaning and heating.

Further, by using a flexible wire as the peeling member, it is possible to prevent the printed matter from being damaged or scratched, and it is possible to improve the printing quality of the recycled paper.

[Brief description of drawings]

1 is a schematic view of an embodiment of a cleaning device according to the present invention, FIG. 1a is a front view, and FIG. 1b is a side view.

FIG. 2 is a schematic side view of an embodiment of a printing machine according to the present invention.

FIG. 3 is a plan view showing how the peeling members of the multi-stage cleaning device are arranged in a comb shape.

[Explanation of symbols]

 11 Adhesive Roller 12 Thermomelting Resin 13 Non-Adhesive Roller 14 Peeling Member 15 Groove 21 Multistage Cleaning Device 22 Printing Section 23 Cleaning Device 24 Peeling Member 25 Cassette 26 Developing Device 27 Document Plate 28 Lens System 29, 30 Charging Device 31 Cleaning Blade 32 Fixing device 33 Photoreceptor

Claims (6)

[Claims] 1. A printed matter printed with a heat-meltable ink on an erasable paper whose surface has been subjected to a release treatment,
A cleaning device for removing the heat-melting ink from the printed matter by bringing the heat-melting resin in a tacky state into contact with each other by heating, the pressure-sensitive adhesive roller having the heat-melting resin adhered to at least the surface, and the pressure-sensitive adhesive. A non-adhesive roller for contacting the printed matter with a roller,
And in the circumferential groove formed on the surface of the adhesive roller,
A cleaning device in which a peeling member for separating the printed matter and the adhesive roller is inserted. 2. A printed matter printed with a heat-meltable ink on an erasable paper having a surface subjected to a release treatment,
A cleaning device for removing the heat-melting ink from the printed matter by bringing the heat-melting resin in a tacky state into contact with each other by heating, the pressure-sensitive adhesive roller having the surface coated with the heat-melting resin, and the pressure-sensitive adhesive roller. Is provided with two or more pairs of rollers made of non-adhesive rollers for contacting the printed matter, and peeling for separating the printed matter and the adhesive roller in a circumferential groove formed on the surface of the adhesive roller. A cleaning device in which a member is inserted and each roller pair is arranged so that the groove portion of each adhesive roller and the flat portion of another adhesive roller overlap each other when viewed from the printed material feeding direction. 3. The cleaning device according to claim 1, wherein the peeling member is a flexible wire. 4. A mold release treatment on a surface of a printing machine for obtaining a printed matter by exposing a precharged photoreceptor to form a latent image, transferring toner to the printed matter, and then thermally fixing the latent image. With a cleaning device that removes the heat-meltable ink from the printed matter by bringing the heat-meltable resin in an adhesive state into contact with the printed matter printed with the heat-meltable ink on the eraserable paper A non-adhesive roller for contacting the printed matter to the adhesive roller and the adhesive roller, at least the surface of which is coated with the heat-meltable resin, and in the circumferential groove formed on the surface of the adhesive roller. A cleaning device in which a peeling member for separating the printed matter and the adhesive roller is inserted, and passes through the cleaning device as the printed matter. A printing machine characterized by using the erasable paper. 5. In a printing machine for obtaining a printed matter by exposing a pre-charged photosensitive member to form a latent image, attaching toner to it, and then transferring it to a printed matter and thermally fixing it, a release treatment is performed on the surface. With a cleaning device that removes the heat-meltable ink from the printed matter by bringing the heat-meltable resin in an adhesive state into contact with the printed matter printed with the heat-meltable ink on the eraserable paper A non-adhesive roller for contacting the printed matter to the adhesive roller and the adhesive roller, at least the surface of which is coated with the heat-meltable resin, and in the circumferential groove formed on the surface of the adhesive roller. A cleaning device in which a peeling member for separating the printed matter and the adhesive roller is inserted, the cleaning device is provided after the printed matter is thermally fixed. A printing machine characterized by being sent to a printing device. 6. The printing machine according to claim 4, wherein the peeling member is a flexible wire.