JPH04356088A - Recording paper regenerating device - Google Patents

Abstract

PURPOSE:To allow the automatic selection of recording paper to the reusable paper, the paper requiring a regeneration treatment again or the unreusable paper by detecting the densities of the recording paper before and after the regeneration treatment and changing over the transporting route for the recording paper according to the results thereof. CONSTITUTION:The densities on the regenerated surface of the recording paper S are detected before the recording paper is introduced into a regeneration treating section 1C when the recording paper S is fed from a paper feed section 1B toward the regeneration treating section 1C. The detection data is taken into the memory section of a control section. The recording paper S discharged after the regeneration treatment is subjected to the detection of the densities of the regenerated surface by a photosensor 4. This data is taken into the memory section, by which a prescribed relation is discriminated The form setting of a 1st transporting path changing over pawl 1E1 and a 2nd transportirg path changing over pawl 1E2 is executed according to the result thereof, by which the paper feeding route to a stacker 1D1 for housing the recording paper, a throwing tank 1D2 and the paper feed section 1B is set.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording paper recycling apparatus, and more particularly to a conveying structure for recycled recording paper.

0002

2. Description of the Related Art Recording paper used for copying, printing, etc. functions as a recording medium by having ink or toner adhered to its surface to carry a visible image. By the way, such recording paper is made using pulp as a raw material, and in recent years, it has been proposed to reuse it in the sense of resource conservation. In other words, the above-mentioned reuse method involves using deinkable ink in a mixture of recording paper that uses deinkable ink and recording paper that uses non-deinkable ink. There is a method of selecting and collecting the used recording paper and turning it into fibers for recycling. On the other hand, apart from such recycling processing, it has also been proposed to use a developer whose main component is deinkable toner to erase this toner and produce recycled recording paper.

[Problem to be solved by the invention]

By the way, the recording paper that has been recycled by the latter method is set in the paper feed section of the printing device and used for printing again, but the recording paper that is ejected from the recycling processing section is not subjected to the recycling treatment. Printing material that has not been recycled may be attached to the recording paper, and such recording paper is also ejected and stored in the same way as recycled recording paper, so it is necessary to identify it when reusing it. There was a risk that printing work would be time-consuming. Furthermore, even in the case of recording paper that has a printed part made of a recyclable material, for example, the printed part may not be completely erased in one recycling process due to a large amount of printing. Even in this case, identification is required as in the case described above. Furthermore, if the background density of the recording paper is high, even if the printed part is erased and recycled, if this is detected by a density sensor, for example, it may be mistakenly determined that it cannot be reused. There is. Also, when detecting whether or not a product is reusable using the concentration sensor described above, it may be desirable to be able to make accurate determinations even if the number of concentration sensors is reduced. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a recording paper recycling device that can accurately and quickly control the recycling status of recording paper when using the above-mentioned conventional recycled recording paper. A further object of the present invention is to provide a recording paper reproducing apparatus in which the density detecting means used to grasp the reproducing status can have a simple structure.

0004

[Means for Solving the Problems] In order to achieve this object, the present invention provides a means for feeding printed recording paper obtained by a printing device, and a regenerating means for erasing and reproducing the printed portion on the recording paper. A recording paper recycling apparatus comprising a processing means, a means for storing reusable recording paper out of the recording paper after recycling processing, and a means for discarding recording paper that cannot be reused, the apparatus comprising: A means for storing the reusable recording paper and a means for discarding the non-reusable recording paper are provided in the conveyance path of the ejected recording paper at a branch position to switch and set the conveyance path of the recording paper. means and
means for detecting the density of the recycled surface of the recording paper, the density detection means being connected to the input side; is connected to the output side, and the control unit compares detection results from the concentration detection means and sets the attitude of the conveyance path switching means according to the results. It is said that

[0005]Furthermore, in the present invention, when the density of the recording paper before reproduction is equal to or higher than the density of the recording paper after reproduction, the control section drives the conveyance path switching means to guide the recording paper to the discarding means. It is characterized by this.

Further, the present invention provides a means for feeding printed recording paper obtained by a printing device, a recycling processing means for erasing and reproducing the printed portion on the recording paper, and a reproduction processing means for reproducing the printed portion of the recording paper after the reproduction processing. means for storing reusable recording paper;
A recording paper recycling device comprising a means for discarding recording paper that cannot be reused and a means for feeding the discharged recording paper to the paper feeding unit again, the recording paper recycling device transporting the recording paper discharged from the recycling processing means. means for switching and setting the conveyance path of the recording paper, which is provided at a branching position along the route to a means for storing the reusable recording paper and a means for discarding the non-reusable recording paper; and a recycling processing means. means for detecting the density of the recycled surface of the recording paper, the density detection means being connected to the input side, and the conveyance path switching means being connected to the output side. and a control unit connected to the control unit, and the control unit is configured to control when the concentration after regeneration is lower than the reference concentration when reuse is possible, when the concentration after regeneration is lower than the concentration before regeneration. sets the conveyance path switching means to feed the recording paper to the reusable recording paper storage means, and if the density after reproduction is higher than the reference density, the paper feeding It is characterized in that the conveyance path switching means is set in a position that allows conveyance toward the feeding means to the section.

The present invention is characterized in that the background density of the recording paper is used as the reference density when the control section is reusable.

Further, the present invention is characterized in that the means for detecting the density of the reproduced surface of the recording paper is provided movably in a direction perpendicular to the conveyance direction of the recording paper.

The present invention also provides a means for feeding printed recording paper obtained by a printing device, a reproduction processing means for erasing and reproducing the printed portion on the recording paper, and a means for reproducing the recording paper after the reproduction processing. A way to store my reusable recording paper,
A recording paper recycling device comprising means for discarding recording paper that cannot be reused and means for feeding the ejected recording paper to the paper feeding unit again, the recording paper recycling device comprising: the paper feeding unit and the reusable recording paper. A means for storing recording paper and a means for discarding recording paper are located on the same side with respect to the recycling processing means, and the recycled surface of the recording paper before and after reproduction is located at a common position of the paper feeding means and the recording paper storage means. The present invention is characterized in that it is configured to include a means for detecting the density of the recording paper, and to set a conveyance path for the recording paper to each of the means in accordance with the detection result by the density detecting means.

[Effect]

According to the present invention, the recycled recording paper is processed by detecting the density of the recording paper before and after reproduction.
Only if the concentration after regeneration is lower than that before regeneration is it transported to storage means. That is, if there is no change in the density after reproduction compared to the density before reproduction, it is discarded. Further, according to the present invention, when the density of the recording paper after recycling is lower than the density before recycling, if the density is equal to or lower than the background density of the recording paper, it is considered as reusable. transported to storage means. Further, according to the present invention, the means for detecting the density of the recording paper can detect substantially the entire width of the recording paper, and moreover, the density can be detected at a common position on the recording paper before and after reproduction. .

[0011]

[Embodiment] Details of an embodiment of the present invention will be explained below with reference to FIGS. 1 to 9. FIG. 1 is a schematic layout diagram for explaining the overall configuration of a recording paper reproducing apparatus according to a first embodiment of the present invention.

That is, in the recording paper reproducing apparatus 1 shown in FIG. 1, a paper feed section 1B is provided on one wall of a housing 1A to accommodate recording paper S after copying obtained by a printing device such as a copying machine. The paper feed section 1B described above includes a recording paper storage cassette 1.
B1, a feeding roller 1B2 that can selectively move toward and away from the leading edge of the recording paper S in the cassette 1B1, and a feeding roller 1B3, and the cassette is directed toward the reproduction processing section 1C, which will be described later. The recording paper S in 1B1 is fed by unwinding it.

On the other hand, the reproduction processing section 1C is set with a recording paper conveyance path going from the top to the bottom in the figure, and in the conveyance path, there is a printed surface of the recording paper (the surface indicated by the symbol A in the figure). A meandering path 1Ca is provided for reversing. The recycling processing unit 1C has a structure for erasing printed parts when toner made of biodegradable plastic is used as the toner in the developer used in the copying machine 2. Specifically, it includes a print decomposition processing section 1C1, a drying section 1C2, and a cleaning section 1C3, each having a configuration shown in FIGS. 2 and 3. That is, the print decomposition processing section 1C1 is composed of a decomposition agent storage tank 1C1a and a decomposition agent application device 1C1c made of, for example, felt and extending between the tank 1C1a and the surface of the recording paper on the conveyor belt 1C1b. Also, drying section 1C2
is composed of a far-infrared lamp 1C2a as a heater, a conveyor belt 1C2b, and a steam exhaust fan 1C2c. Therefore, by setting the conveyance speed of the conveyor belt 1C1b, the recording paper S fed from the paper feed section is coated with a decomposition agent by the decomposition agent coating device 1C1c, and the printed portion on the surface is biodegraded. It is erased, dried in a drying section 1C2, and fed to a cleaning section 1C3, which will be described later. In addition, inside the print decomposition processing section 1C1, temperature and humidity management for promoting decomposition is performed by a temperature and humidity sensor 1C1d, and temperature and humidity settings by this sensor 1C1d are controlled by an ultrasonic humidifier 1C1e and a humidity sensor 1C1d. This is performed by a ceramic heater 1C1f within the conveyor belt 1C1b facing the non-recycled surface of the recording paper S.

On the other hand, the above-mentioned cleaning section 1C3,
It has the function of removing toner from the printed portion that is released on the surface of the recording paper by drying, and specifically, it uses a rotating brush 1C3a that can rub the surface of the recording paper, and a rotary brush 1C3a that comes into contact with the brush 1C3a to remove the toner on the surface of the recording paper. A cleaner that removes toner that has been swept from the
Cleaning blade 1C3b and cleaning blade 1C
A toner collecting member 1C3c consisting of a paddle wheel or a screw body collects the toner removed from the rotating brush 1C3a by the rotating brush 1C3b, and the recording paper S is held between the rotating brush 1 and the toner collecting member 1C3c.
The ultrasonic transducer 1C3d is arranged opposite to the ultrasonic transducer C3a. And cleaning section 1C3
The recording paper S that has passed through is transferred to the recording paper storage stacker 1D located on the exit side of the conveyance path with the printed side A reversed and the non-reproduction side (the side indicated by the symbol A' in FIG. 1) facing upward. It is designed to be discharged.

The above-mentioned recording paper storage stacker 1D is a reusable recording paper storage stacker 1 that stores reusable recording paper S among the recording paper S discharged from the recycling processing section 1C1.
Discard tank 1D that accommodates D1 and recording paper that cannot be reused
Of these, a shredder 1D3 is installed at the entrance of the recording paper to the disposal tank 1D2.
It is designed to cut the recording paper that is introduced. Therefore, the conveyance path 1E on the recording paper discharge side from the recycling processing section 1C branches into the above-mentioned stacker 1D1 for storing reusable recording paper and the discard tank 1D2, and at this branch position there is a swingable first A transport path switching claw 1E1 is provided. This first
The conveyance path switching pawl 1E1 has its oscillating position set by a solenoid 1E1a which is driven and controlled by a control section to be described later, and is in a normal position, that is, an initial position.
For example, the direction is set so that the recording paper can be introduced into the discard tank 1D2. Further, the above-mentioned conveyance path 1E further branches behind the first conveyance path switching claw 1E1, one of which is connected to the above-mentioned reusable recording paper storage stacker 1D1, and the other is connected to the above-mentioned paper feed section. It has been extended to 1B.

For this reason, the first transport path switching claw 1E1
A second conveyance path switching pawl 1E2 is also provided at a branch position of the conveyance path located behind the conveyance path. This pawl 1E2 is driven by a solenoid 1E which is driven and controlled by a control section which will be described later.
The rocking position is set by 2a, and in the normal position, that is, the initial position, for example, the recording paper S is placed in the paper feed section 1.
The direction in which it can be introduced is set for B. In the figure, the reference numeral 1E3 indicates a feeding roller disposed in the conveying path.

On the other hand, as shown in FIG. 4, the above-mentioned control unit 2 has a main part composed of a microcomputer 2A, and is connected to external equipment via an I/O interface 2B. ing. In other words, the I/O interface
Reflective photosensors 3 and 4 for density detection are connected to the input side of the storage 2B, respectively, and are arranged at the recording paper introduction position in the paper feed section 1B and at the recording paper ejection side of the recycling processing section 1C. On the output side, there is a first conveyance path switching claw 1.
A drive circuit 5 for the solenoid 1E1a for E1 and a drive circuit 6 for the solenoid 1E2a for the second conveyance path switching claw 1E2 are connected to each other.

The photosensors 3 and 4 described above are shown in FIG.
), the moving direction is set to the conveyance direction of the recording paper S (St
), and together with the transport direction of the recording paper S, as shown by the broken line in FIG. can be scanned for concentration detection. The output and density from the photosensors 3 and 4, in other words,
The relationship with the amount of residual toner is as shown in Figure 6.
, it is shown that the sensor output based on the amount of reflected light decreases as the remaining amount of toner increases.

The above-mentioned control unit 2 then determines the density (D1) of the reproduced surface of the recording paper S before the reproduction process by each of the photosensors 3 and 4 and the density (D1) of the reproduced surface of the recording paper after the reproduction process. D2) is input, D1-D2
≦0...When the relationship (1) is satisfied, the drive circuit 5 of the solenoid 1E1a is not driven and the first transport path switching claw 1E1 is
maintain the initial position. Therefore, the recording paper S discharged from the reproduction processing section 1C passes through the conveyance path 1E and is fed to the discard tank 1D2. On the other hand, each concentration mentioned above is D1-D
2>0 (2) When the following relationship is satisfied, the drive circuit 5 of the solenoid 1E1a is driven to swing the first transport path switching pawl 1E1 from the initial position. Therefore, the recording paper S discharged from the reproduction processing section 1C1 passes through the conveyance path 1E and is fed to the position of the second conveyance path switching claw 1E2. By the way, in the latter case, the first transport path switching claw 1E1
When the attitude setting is performed, it is determined what kind of relationship the density (D2) of the recycled surface of the recording paper after the recycling process has with the reference density (D0) for determining that it can be reused. . In other words, this determination uses the background density of the recording paper as a reference density, and when the relationship D0-D2>0 (3) holds, the density of the recycled recording paper is a density that can be reused. Based on this determination, the drive circuit 6 of the solenoid 1E2a is driven to swing the second transport path switching pawl 1E2 from its initial position. Therefore, the recording paper S is fed toward the recording paper storage stacker 1D1. On the other hand, if the relationship shown in (3) does not exist, the playback process is performed, but 1
It is determined that the printed portion has not been completely erased in this process, and the second transport path switching pawl 1E2 is maintained in the initial position without driving the drive circuit 6 of the solenoid 1E2a. Therefore, the recording paper S is not fed to the recording paper storage stacker 1D1, but is instead fed to the paper feeding section 1B and subjected to the reproducing process again. Note that the background density used as the above-mentioned reference density is actually the background density (D0') when not in use, taking into account the density (D0') caused by toner stains remaining in the fibers of the recording paper S. DMIN),
It is set as D0=DMIN+D0'.

Since this embodiment has the above configuration,
The conveyance state of the recording paper will be described below based on the operation of the control section 2 shown in the flowcharts of FIGS. 7 and 8. That is, when the recording paper S is fed from the paper feed section 1B to the reproduction processing section 1C, the density of the recycled surface of the recording paper S is detected before being introduced into the reproduction processing section 1C, and this detection data is
data is imported into the storage section of the control section 2. Then, the density of the recording paper S discharged after the reproduction process is detected by the photosensor 4 on the reproduction surface, and this detection data is taken into the above-mentioned storage section, and the relationships (1) to (3) above are stored. The positions of the first conveyance path switching claw 1E1 and the second conveyance path switching claw 1E2 are set according to the determination results, so that the recording paper storage stacker 1D1 and the discard tank 1 are
A feeding route to D2 and paper feeding section 1B is set.

[0021] In the above-described configuration, the photosensors for detecting the density of the recording paper were installed on the recording paper introduction side and the output side of the recycling processing section, but it is also possible to install them at common locations, for example. can.

FIG. 9 shows the configuration in the above case,
In this configuration, the paper feed section, the recording paper storage stacker, and the discard tank are each provided on the same side with respect to the recycling processing section. That is, the conveyance path of the recording paper from the paper feed section 1B to the recycling processing section 1C is merged with the conveyance path 1E from the recycling processing section 1C to the reusable recording paper storage stacker 1D1 near the entrance of the recycling processing section, A photosensor 3 for concentration detection is provided at this merging position. The above-mentioned conveyance path 1E has a stacker 1D1 for storing reusable recording paper on the way.
The path is branched into a path leading to the tank 1D2 and a path leading to the disposal tank 1D2, and at this branching position, there is a first transport path switching claw 1E.
Only the claw 1E4 corresponding to number 1 is arranged. The swinging position of the pawl 1E4 is set by a solenoid 1E1a. Therefore, in this configuration, in order to introduce the recording paper S into the recycling processing section 1C in order to undergo the recycling process again, one of the feed rollers 1E3 provided in the conveyance path 1E is used for storing reusable recording paper. Stacker 1D
The roller provided at the position corresponding to the recording paper introduction side in 1 is rotatable in forward and reverse directions, and is called a switchback roller.
The roller 7 is configured such that the recording paper that has been introduced can be fed out from a state where the rear end in the introduction direction is gripped. According to this embodiment, since the photosensor for concentration detection can be used in common, structural costs can be reduced by reducing the number of parts and simplifying the transport route. In addition, the photo sensor 3 detects the movement of the recording paper.
It is also possible to synchronize and detect at the same position.

[0024] The composition of the toner in the print section erased in the above-mentioned regeneration processing section is as follows. This toner is made of biodegradable plastic, and for example, as its component composition, plastic classified as a polysaccharide is used. Specific examples of this plastic include Ecostar and Ecostar Plus (both product names manufactured by Ogiwara Kogyo).
The amount of this plastic is 1 to 70 parts by weight, preferably 1.5 to 5 parts by weight, based on 100 parts of the binder resin.
0 parts by weight is selected. Further, the particle size of the toner made of this plastic is about 30 μm or less, preferably 3 to 20 μm.
μm is selected. In order to improve the fluidity of the toner, TiO2, SiO2, SnO2 or Al2
Other external additives such as O2 may also be added. Furthermore, when the above-mentioned biodegradable plastic is used, lipase or a lipase-acting substance is used as the enzyme for decomposing the toner. The lipase mentioned above is
In addition to lipase for enzymatic decomposition, esterase, phospholipase, lysophoslipase, etc. for ester decomposition may be used. Furthermore, lipase-acting substances act in the same way as lipase, and specifically include crude lipase, lipase-containing substances, lipase-producing bacteria, and lipase-producing cultures. be. In addition, in order to promote the decomposition performance, a buffer may be used to maintain the pH during decomposition, and a surfactant may be used to increase the contact area with the degrading enzyme.
In this case, primary phosphate, secondary phosphate, and a nonionic surfactant as a surfactant may be used as the materials.

Furthermore, the toner that is erased and recycled in the above-mentioned recycling processing section 1C may be made of photodegradable plastic, and in this case, the decomposition processing section in the recycling processing section 1C shown in FIG. Although not shown, the structure of
Decomposer storage tank 1C1a and decomposer application device 1C1
In place of c, a xenon lamp, a mercury lamp, an LED, or a laser capable of emitting short wavelength light is used, and in addition, a cleaning section 1C3 is combined.

Toners using photodegradable plastics include plastics containing polymers of vinyl ketone monomers, and specifically include the following components. Methyl vinyl ketone, methyl isopropenyl ketone, t-butyl vinyl ketone, ethyl vinyl ketone, phenyl vinyl ketone, divinyl ketone, acetoxymetholeketone, chloromethyl ketone, α-acetoxymethylvinyl ketone, β-chlorvinylmethylketone, α- Chlormethyl vinyl ketone. In addition, the polymer of these vinyl monomers may be a homopolymer or a copolymer, and the partner monomers of the copolymer are specifically vinyl monomers such as ethylene, styrene, and methyl. Examples include methacrylate, α-butyl methacrylate, α-ethylenehexyl methacrylate, vinyl chloride, α-methylstyrene, acrylonitrile, vinyl acetate, and propylene. This plastic is used in an amount of 1 to 70 parts by weight, preferably 1.5 to 50 parts by weight, based on 100 parts of the binder resin.
Parts by weight.

Furthermore, as a photodegradation accelerator, aldo-
Ru-α-naphthylamine condensate, acetylacetone, iron metal diethyl-dithiocarbamate, salicylaldehyde, α-methylcaptobenzothiazole, metal stearate, thiodipropionic acid, iron acetylacetonate, p- Benzonequinone, alpha-naphthoquinone, anthraquinone and derivatives thereof are selected. Furthermore, by adding the above-mentioned decomposition accelerator to the above-mentioned binder resin,
The amount is selected to be 1 to 70 parts by weight, preferably 1.5 to 50 parts by weight, based on 10 C0 parts of the binder. Also,
The decomposition accelerator may be used alone or in combination of two or more. The toner particle size is about 30 μm or less, preferably 3 to 20 μm. Also, toner
TiO2, SiO2, Sn
Other additives such as O2, Al2O3, etc. may also be added.

The above-mentioned photodegradable plastic can be used as a toner.
When a toner is constituted, the ketone group therein efficiently absorbs light energy upon irradiation with light and cleaves the -C-C bond, thereby eliminating functions such as fixing and adhesion properties as a toner. Therefore, the light source used for light irradiation is preferably short-wavelength light with good absorption properties, and for this reason, it is preferable to use a lighting device such as a xenon lamp or a mercury lamp that contains a large amount of ultraviolet rays. Furthermore, short wavelength lasers may be used instead of these illumination light sources. Furthermore, the short wavelength light mentioned above is
A light source using this kind of short wavelength light is advantageous because it also effectively acts on the decomposition accelerator added to the binder resin.

[0029]

Effects of the Invention According to the present invention, the density of the recycled surface of the recording paper before and after reproduction is detected, and by comparing these densities, it is automatically determined whether the paper has been reproduced or not. If not, it can be discarded on the spot, and the status of the recycled paper can be automatically determined, saving the trouble of sorting and making it possible to quickly utilize the recycled paper. Furthermore, according to the present invention, recording paper that has not been completely recycled to the point where it can be reused can be automatically recycled to a reusable state, and moreover, it is possible to automatically regenerate recording paper that has not been completely recycled to the point where it can be reused. Even if recycled paper is used, it can be automatically determined that the cause of the problem is something that is affected by the background density, such as colored recording paper, which eliminates the need for sorting when using recycled paper. . Therefore, it is easier to use when using recycled paper. Furthermore, the number of means used for concentration detection can be reduced, thereby making it possible to save time and effort required for parts management and assembly of mechanical devices. Furthermore, by setting the movement position, the means used for density detection can detect and scan a wide range of the reproduction surface of the recording paper, thereby making it possible to accurately grasp the reproduction situation.

[Brief explanation of the drawing]

FIG. 1 is a schematic layout diagram for explaining the overall configuration of a recording and reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a part of a regeneration processing section used in the apparatus shown in FIG. 1;

FIG. 3 is a perspective view showing other parts of the regeneration processing section shown in FIG. 1;

FIG. 4 is a block diagram for explaining the control configuration of the reproduction processing section shown in FIG. 1;

5 is a schematic perspective view and a plan view for explaining the configuration and operation of a concentration detection means connected to the control section shown in FIG. 4; FIG.

FIG. 6 is a diagram for explaining characteristics of the control section shown in FIG. 4;

FIG. 7 is a flowchart for explaining the operation of the control section shown in FIG. 4;

FIG. 8 is a flowchart for explaining the operation of the control section shown in FIG. 4;

9 is a schematic layout diagram for explaining another configuration of the recording paper reproducing device shown in FIG. 1. FIG.

[Explanation of symbols]

1 Recording paper recycling device 1B Paper feeding section 1C Recycling processing section 1D Stacker 1D1 Recording paper storage stacker 1D2 Discard tank 1E Conveyance path 1E1 First conveyance path switching claw 1E2
Second transport path switching claw 2 control section

Claims (6)

[Claims] 1. Means for feeding printed recording paper obtained by a printing device, recycling processing means for erasing and reproducing printed portions on the recording paper, and reuse of the recording paper after the recycling processing. A recording paper recycling device having a means for storing recording paper that can be reused and a means for discarding recording paper that cannot be reused, wherein the reusable recording paper is means for switching and setting the transport path of the recording paper, provided at a branching position between a means for storing the recording paper and a means for discarding the recording paper that cannot be reused;
means for detecting the density of the recycled surface of the recording paper, the density detection means being connected to the input side; is connected to the output side, and the control unit compares detection results from the concentration detection means and sets the attitude of the conveyance path switching means according to the results. Recording paper recycling device. 2. The recording paper reproducing device according to claim 1, comprising:
The control section is a recording paper reproducing device that drives a conveyance path switching means to guide the recording paper to a discarding means when the density of the recording paper before reproduction is equal to or higher than the density of the recording paper after reproduction. 3. Means for feeding printed recording paper obtained by a printing device, recycling processing means for erasing and reproducing the printed portion on the recording paper, and reuse of the recording paper after the recycling processing. A recording paper recycling device comprising means for storing recording paper that cannot be reused, means for discarding recording paper that cannot be reused, and means for feeding the ejected recording paper to the paper feeding section again, the apparatus comprising: A means for storing the reusable recording paper and a means for discarding the non-reusable recording paper are provided in the transport path of the recording paper discharged from the processing means at a position where the transport path of the recording paper diverges. means for setting the switching;
means for detecting the density of the recycled surface of the recording paper, the density detection means being connected to the input side; is connected to the output side, and the control unit is configured to adjust the concentration after regeneration relative to the reference concentration when reuse is possible when the concentration after regeneration is lower than the concentration before regeneration. If the recording paper is low, the conveying path switching means is set to feed the recording paper to the reusable recording paper storage means, and if the density after reproduction is higher than the reference density. . A recording paper reproducing apparatus, characterized in that the conveying path switching means is set in a position that allows the recording paper to be conveyed toward the feeding means for the recording paper feeding section. 4. The recording paper reproducing device according to claim 3, further comprising:
The control unit is a recording paper recycling device that uses the background density of the recording paper as a reference density when it can be reused. 5. The recording paper reproducing device according to claim 2, further comprising:
The means for detecting the density of the recycled surface of the recording paper is provided in a recording paper reproducing device that is movable in a direction perpendicular to the conveyance direction of the recording paper. 6. Means for feeding printed recording paper obtained by a printing device, recycling processing means for erasing and reproducing printed portions on the recording paper, and reuse of the recording paper after the recycling processing. A recording paper recycling device comprising a means for storing recording paper that can be reused, a means for discarding recording paper that cannot be reused, and a means for feeding the ejected recording paper again to the paper feeding section, the recording paper recycling device comprising: The paper means, the reusable recording paper storage means, and the recording paper disposal means are located on the same side with respect to the recycling processing means, and the paper feeding means and the recording paper storage means are located at a common position. The present invention is characterized by being provided with a means for detecting the density of the recycled surface of the recording paper before and after reproduction, and configured to set the transport route of the recording paper to each of the above means according to the detection result by the density detection means. Recording paper recycling device.