JP2000112307A - Device and method for regenerating recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a paper folding from being caused at the time of scraping printing material at the front end or the rear end of a recording medium even though the rigidity of the recording medium is low by controlling the rotating direction of a 1st brush roller scraping the printing material from the surface layer of the recording medium by its own rotation. SOLUTION: When the leading edge of a sheet 4 passing through a wetting part is detected, a controller sets a rotation switching mechanism so that rotating brushes 76 and 78 rotate in a direction where they give force in an equal direction to the carrying direction of the sheet 4 to the sheet 4. Thereafter, when the trailing edge of the sheet 4 is detected, the controller sets the rotation switching mechanism so that the brushes 76 and 78 give force in a reverse direction to the carrying direction of the sheet 4 to the sheet 4. As a result, a sheet part passing through 1st rollers is prevented from being wound round the brushes 76 and 78 or jammed between the brushes 76 and 78 and 2nd rollers 70 and 72.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium reproducing apparatus for removing a printing material by applying a cleaning liquid to a recording medium such as paper on which an image is printed by an image forming apparatus such as a copying machine or a printer.

[0002]

2. Description of the Related Art Conventionally, as a reproducing apparatus for removing toner from a recording medium on which an image has been printed by an image forming apparatus such as a copying machine, first, the recording medium is immersed in a cleaning liquid such as a dispersant, and then the toner image is released. Japanese Patent Application Laid-Open Nos. Hei 6-324602 and Hei 7-1 discloses a method using a brush roller.
40554, JP-A-9-80624, JP-A-9-9
No. 0830 and the like.

[0003]

In any of the above-mentioned inventions, while the recording medium is being conveyed in a certain direction, the tip of the brush is brought into contact with the tip of the brush and the recording medium in the recording medium conveyance direction. The printing material is scraped off by rotating the brush roller faster than the transport speed so as to move the printing material. More specifically, as shown in FIG.
Means for transporting, for example, a pair of transport rollers for transporting the recording medium by its own rotation while pinching the recording medium, are rotated so that the speed of the clamping unit is equal to the transport speed, while a brush roller Is rotating at a high speed so that the brush tip moves faster than the transport speed. Therefore, in particular, when the recording medium has low rigidity (for example, when the recording medium is weak paper), as shown in FIG. 5, when the printing material around the rear end of the recording medium is scraped off, the brush roller is used. "Paper breakage" is likely to occur in the vicinity.

[0004]

SUMMARY OF THE INVENTION A reproducing apparatus for removing a printing material from a recording medium on which an image is printed in the process of transporting the recording medium in a predetermined direction is provided on a surface of the recording medium swollen by use of a cleaning liquid. A first brush roller for scraping the printing material from the layer by its own rotation, a rotating means for giving a rotational drive to the first brush roller, and a control unit for controlling a rotating direction of the rotating means. When the print material at the front end in the transport direction of the recording medium is scraped, the rotation direction of the first brush roller is a direction in which the recording medium is transported in the transport direction. When scraping the printing material at the end, the rotation direction of the first brush roller is a direction that hinders the conveyance of the recording medium in the conveyance direction, and the switching between the two rotation directions is performed by the control unit. Control to.

[0005] In the reproducing apparatus, the second brush roller is disposed opposite to the first brush roller with the recording medium conveyance path interposed therebetween, and holds the conveyed recording paper together with the first brush roller. Given a rotational drive by the rotating means, scraping the printing material by its own rotation from the surface layer of the recording medium swollen by the use of a cleaning liquid,
When scraping the printing material at the front end in the transport direction of the recording medium, the rotation direction of the second brush roller is a direction for transporting the recording medium in the transport direction, and the rear end of the recording medium in the transport direction. When the printing material of the set is scraped, the rotation direction of the second brush roller is a direction that hinders the conveyance of the recording medium in the conveyance direction, and the switching between the two rotation directions is controlled by the control unit. I do.

[0006] In the above-mentioned two types of reproducing apparatus having a roller brush, the controller may stop the conveyance of the recording medium for a predetermined time when the rotation direction of the brush roller is switched.

Further, by utilizing the relative difference between the moving speed of the bristle tip of the brush roller and the conveying speed of the recording medium, the brush roller scrapes the printing material from the surface layer of the recording medium swollen by the use of the cleaning liquid. It is desirable to take.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a schematic configuration of a reproducing apparatus 2 that reproduces a recording medium such as a paper on which an image is printed or a transparent film for OHP by removing a printing material forming the image and reusing the recording medium. . The reproducing apparatus shown in FIG. 1 coats a recording medium in advance with a water swelling film, prints an image on the recording medium, and sprays a cleaning liquid containing no organic solvent immediately before and at the time of removing the printing material. This is a well-known water-swellable film brushing system in which a printing material is removed by a brush roller.

First, the configuration of the reproducing apparatus 2 will be briefly described along with the operation. The playback device 2 includes a supply device 6 that stores unrecorded recording media (that is, sheets 4) in a stacked manner,
The sheet 4 stored in the supply device 6 is sent out to the conveyance path 10 based on the rotation of the supply roller 8. When a plurality of sheets 4 are continuously supplied, a certain sheet 4 and
A predetermined distance is kept between the sheet and the sheet supplied subsequently.

A conveying roller pair 12 is disposed in the conveying path 10, and the sheet 4 is supplied to the printing material removing unit 14 by the conveying roller pair 12. Printing material removal unit 14
Is supplied with a cleaning liquid in a wetting step, so that the sheet 4 is wetted together with the printing material, and then, in a removing step, the printing material is physically removed. The printing material removing unit 14 and the printing material removing process will be described later in detail.

The sheet 4 sent from the printing material removing section 14 is provided with two pairs of transport rollers 1
It is supplied to the drying device 20 by 6 and 18, and is dried by this drying device 20. After that, the dried sheet 4 is discharged to a discharge unit 24 by a discharge roller 22 disposed in the transport path 10.

Next, the printing material removing section 14 will be described. The printing material removing section 14 has a tank 26. The tank 26 has a cleaning liquid 28 for moistening the sheet 4 and the printing material adhering thereto to such an extent that the printing material can be easily removed from the sheet 4 by physical force. Generally, the cleaning liquid 28 comprises water and a surfactant. The printing material removing unit 14 also includes a wetting unit 30 that showers the sheet 4 sent from the supply unit 6 with the cleaning liquid 28 to wet the sheet 4 and the printing material, a sheet 4 moistened by the wetting unit 30 and the printing material. And a separation unit 32 for separating the printing material from the sheet 4 while showering the cleaning liquid 28 again.

The wetting section 30 and the separating section 32 have housings 34 and 36, respectively. The housings 34 and 36 include a part of the sheet conveyance path 10 therein, and the sheet 4 passes through the housings 34 and 36. The housings 34, 36 have cleaning liquid shower holes 42, 44 on their respective ceilings 38, 40 to spray the cleaning liquid onto the sheet 4 passing therethrough. Each of the shower holes 42 and 44 is connected to the cleaning liquid tank 26 via a conduit 46. The pipe 46 has a pump 48, and the cleaning liquid 28 is sucked up from the tank 26 by the pump 48, and the cleaning liquid is shower-sprayed into the housings 34, 36 through the shower holes 42, 44.

The housing 34 of the wetting section 30 includes a separating section 32
Is provided at a position higher than the housing 36, and the two housings 34, 36 are connected via the transport path 10 or a communication path (not shown). Alternatively, the fluid flows into the housing 36 of the separating portion 32 via the communication passage. These are connected by another pipe 50 in order to collect the cleaning liquid in the separation section 32 into the tank 26. In order to remove the printing material separated from the sheet 4 from the collected washing liquid 28, the line 50 is connected to the filter 5.
2 The pipes 46 and 50 have valves 5 respectively.
4 and 56 are provided so that the amount of the cleaning liquid 28 sprayed onto the sheet 4 can be controlled.

The printing material removing section 1 having such a configuration
In 4, the cleaning liquid 28 stored in the tank 26 is pumped up through a pipe 46 by a pump 48, and is conveyed through housings 34 and 36 of the wetting section 30 and the separation section 32 through shower holes 42 and 44. Be poured into. The cleaning liquid 28 in the wetting section housing 34 is sent to the separation section housing 36 via the transport path 10 or the communication path, and is returned to the tank 26 through the pipe 50 together with the cleaning liquid injected into the separation section housing 36. The printing material contained in the cleaning liquid 28 returned to the tank 26 is collected by the filter 52. Therefore,
In the tank 26, only the reusable cleaning liquid not containing the printing material is collected.

Referring to FIGS. 1 and 2, the printing material removing mechanism 6 arranged in the housing 36 of the separating portion 32 is shown.
0 will be described in detail. The printing material removing mechanism 60 includes two rollers 64 that are in contact with each other across a sheet conveying path (path indicated by a dashed line in FIG. 2) 62 to convey the sheet 4.
A first roller pair including 66, and a sheet conveying direction (a direction from the left side to the right side in the figure) than the first roller pair 68
And a second roller pair 74 composed of two rollers 70 and 72 that are arranged on the downstream side with respect to the sheet conveyance path 62 and are in contact with each other. These first and second roller pairs 6
8, 74, an upper rotating brush 76 arranged above the sheet conveying path 62 and a lower rotating brush 78 arranged below the sheet conveying path 62 so as to face the upper rotating brush 76, Each rotating brush 76, 78
The bristle tips can contact the front and back surfaces of the sheet 4 conveyed along the sheet conveyance path 62, respectively.

First roller 64, 66, second roller 7
Reference numerals 0 and 72 are drivingly connected to the motor 82 via a first clutch 96 and a second clutch, respectively. The motor 82 is connected to a control device (controller) 84 that controls the conveyance of the sheet 4.
, The rollers 64 and 70 disposed above the sheet transport path 62 rotate counterclockwise, and the rollers 66 and 72 disposed below the sheet transport path 62 rotate. The sheet 4 rotates clockwise so that the sheet 4 can be conveyed in the sheet conveying direction. In the present embodiment, in order to obtain a suitable conveyance state of the sheet 4, the outer peripheral surface moving speed of the second roller pair 74 (that is, the sheet conveying speed) is lower than the outer peripheral surface moving speed of the first roller pair 68. The sheet 4 held slightly by the first roller pair 68 and the second roller pair 74 is slightly pulled in the transport direction. The first clutch 96 and the second clutch 98
Each has a braking function, and both are directly connected to the control device 84. Therefore, based on the signal from the control device 84, the timing at which the first rollers 64 and 66 and the second rollers 70 and 72 are driven by the motor 82 is
It is determined.

The rotating brushes 76 and 78 are connected to a motor 82 via a rotation switching mechanism 86, respectively. The rotation switching mechanism 86 is connected to a control device 84, and based on a signal from the control device 84, the two rotary brushes 7
The rotation of the upper and lower rotating brushes 76 and 78 is performed in the first state in which the upper rotating brush 76 rotates in the counterclockwise direction and the lower rotating brush 78 rotates in the clockwise direction. Switching is performed between a second state in which the rotating brush 78 rotates counterclockwise. As the rotation switching mechanism 86, a combination of a plurality of gears is generally used. The rotation switching mechanism 86 also controls the outer peripheral speed (movement speed of the bristle tip) of the rotating brushes 76 and 78 by using the first and second rollers 64, 66, 70 and 7.
The moving speed is larger than the moving speed of the outer peripheral surface 2 to obtain a relative speed difference between the conveyed sheet 4 and the rotating brushes 76 and 78. The outer peripheral speed of the rotating brushes 76, 78 is
If the outer peripheral surface moving speed of the first and second rollers 64, 66, 70, and 72 is 5 times or less, the printing material described below will not be sufficiently removed. Problems such as noise occur due to excessive rise. Therefore,
The relative speed ratio between the outer peripheral speed of the rotating brushes 76, 78 and the outer peripheral surface moving speed of the first and second rollers 64, 66, 70, 72 is generally a value of 5 to 40 times. More preferably, the value is 10 to 30 times.

In order to control the operation timing of the rotation switching mechanism 86 and the stoppage of the operation of the motor 82, the sheet is provided upstream of the first roller pair 68 and downstream of the second roller pair 74 in the sheet transport direction. Sensors 88 and 90 capable of detecting the front end and the rear end of 4 are provided. Sensor 8
Optical sensors, mechanical sensors, and other sensors can be used as 8, 90.

Although not shown, the first roller 64,
66 and rotating brushes 76, 78, and rotating brushes 76, 7
It is preferable to provide a sheet guide for conveying the sheet 4 along the sheet conveying path 62 between the second roller 8 and the second rollers 70 and 72. In addition, the sheet guide prevents the cleaning liquid sprayed upward from accumulating on the sheet guide and minimizes the resistance received from the sheet guide and the cleaning liquid adhering to the sheet guide. Preferably, it is composed of a plurality of elongated members arranged.

The printing material removing mechanism 60 having the above configuration is provided.
Will be described. When the first sensor 88 detects the leading end of the sheet 4 that has passed through the wet section 30, the control device 84
Sets the rotation switching mechanism 86 such that the rotating brushes 76 and 78 rotate in the direction indicated by the arrow in FIG. 4 (that is, the sheet receives a force from the rotating brush in the sheet conveying direction and the forward direction). . Subsequently, the control device 84 connects the first clutch 96 and the second clutch 98, and then controls the motor 8
2 to rotate the rollers 64, 66, 70, 72 and the rotating brushes 76, 78 in the directions indicated by the arrows in FIG. 4 (that is, to the first state). As a result, the leading end of the sheet 4 is sandwiched between the first rollers 64 and 66, and the rotation thereof causes the rotation between the rotating brushes 76 and 78 (that is,
Into the separation area 92).

When printing materials are adhered to the upper surface and the lower surface of the sheet 4, these printing materials are already moistened in the previous wetting step, and can be separated from the sheet 4 only by applying physical force. Therefore, based on the relative speed difference between the rotating brushes 76, 78 and the sheet 4, the rotating brushes 76, 7
Easily removed from sheet 4 by the physical force provided by 8. The leading end of the sheet 4 that has passed through the separation area 92 is sandwiched between the second rollers 70 and 72, and is conveyed toward the drying device 20. The sheet 4 is the first roller 6
4 and 66 and the second rollers 70 and 72, the sheet 4 is conveyed in a pulled state due to the relative sheet conveyance speed difference between the pair of rollers 68 and 74. As a result, , The rotating brushes 76 and 78 in the separation area 92
Receives an appropriate scraping force from

Thereafter, the rear end of the sheet 4 is
When the detection is made at step 8, the control device 84 temporarily stops driving the motor 82. Next, the control device 84 controls the rotating brush 7
The rotation switching mechanism 86 is set so that the rollers 6 and 78 rotate in the direction of the dotted line in FIG. 6 (that is, the direction in which the sheet 4 receives a force in the direction opposite to the sheet conveying direction from the rotating brushes 76 and 78). Subsequently, the control device 84 controls the first clutch 9
6. After the second clutch 98 is disengaged, the motor 82 is driven again to rotate the rotating brushes 76 and 78 in the direction of the dotted line in FIG. 6 (that is, to the second state). Rotating brush 76,
After the rotation speed of 78 reaches the target rotation speed, the control device 84
Connects the first clutch 96 and the second clutch 98, and rotates the rollers 64, 66, 70, and 72 in the solid line direction in FIG. As a result, the second rollers 70, 7
A force in a direction opposite to the sheet conveying direction acts on a portion of the sheet 4 between the two. As a result, the sheet portion that has passed between the first rollers wraps around the rotating brushes 76, 78, or the rotating brushes 76, 78 and the second rollers 70, 7
There is no jam between the two.

The above-described first and second rollers 64, 6
The temporary stop of the rotation of the rotating brushes 6, 70, 72 and the rotating brushes 76, 78 is to prevent the occurrence of printing material removal unevenness.

The rear end of the sheet 4 is provided with rotating brushes 76 and 78.
When the trailing end is detected by the second sensor 90, the control device 84 stops the motor 82, and the roller 6
4, 66, 70, 72 and the rotating brushes 76, 78 are respectively stopped. Thereafter, when the next sheet passes through the wet portion 30 and the leading end of the sheet is detected by the first sensor 88, the control device 84 causes the rotating brushes 76, 78 to move in the direction indicated by the arrow in FIG. The rotation switching mechanism 86 is set so that the sheet rotates again in the direction in which the sheet receives a force in the sheet conveying direction and the forward direction from the rotating brush. Subsequently, the control device 84 controls the first clutch 96 and the second clutch 98
Is connected, the motor 82 is driven again, and the rollers 64, 6
6, 70, 72, and rotating brushes 76, 78, respectively, in FIG.
, And rotate in the direction indicated by the arrow (that is, return to the first state). Thereafter, the above-described removing operation is repeated.

When a plurality of sheets are continuously supplied,
The interval between the previous sheet and the next sheet is such that the rear end of the previous sheet passes through the second sensor 90, and the rollers 64, 66,
70, 72 and the rotating brushes 76, 78 are stopped, and thereafter, the feeding device 6 is set so that the leading end of the next sheet passes through the first sensor 88.

FIG. 3 shows a second embodiment of the printing material removing mechanism. In the printing material removing mechanism 94 of the embodiment shown in FIG. 3, the DC motor 106 drives the rotating brushes 76 and 78, respectively. Further, the DC motor 106 is connected to a control device 84, and based on a signal from the control device 84,
The two rotating brushes 76, 78 are rotated in a first state in which the upper rotating brush 76 rotates counterclockwise and the lower rotating brush 78 rotates clockwise, and the upper rotating brush 76 rotates clockwise. It switches between a second state in which the lower rotating brush 78 rotates in the counterclockwise direction while rotating and a stopped state. The DC motor 106 also includes rotating brushes 76, 78
Of the conveyed sheet 4 and the rotating brushes 76, 78 by setting the outer peripheral speed (the moving speed of the bristle tip) of the sheet 4 higher than the outer peripheral surface moving speed of the first and second rollers 64, 66, 70, 72.
And a relative speed difference is obtained. The specific numerical value of the relative speed difference and the other configuration are the same as those of the printing material removing mechanism 60 of the embodiment of FIG. 2, and the same reference numerals are given to the same portions according to the configuration of the embodiment, and the description will be omitted.

The operation of the printing material removing mechanism 94 of the second embodiment having the above configuration will be described focusing on differences from the printing material removing mechanism 60 of the embodiment of FIG. When the first sensor 88 detects the leading end of the sheet 4 that has passed through the wetting section 30, the control device 84 determines that the rotating brushes 76 and 78 move in the direction indicated by the arrow in FIG. The DC motor 106 is set and driven (that is, brought into the first state) so as to rotate in the direction of receiving the forward force from the rotating brush. At the same time, the control device 84
To rotate the rollers 64, 66, 70, and 72 in the directions indicated by arrows in FIG. Thereby, sheet 4
Is held between the first rollers 64 and 66, and is fed between the rotating brushes 76 and 78 (that is, the separation area 92) by their rotation.

The reason why the printing material is easily removed from the sheet 4 by the physical force given by the rotating brushes 76 and 78 based on the relative speed difference between the rotating brushes 76 and 78 and the sheet 4 is shown in FIG. This is the same as the case of the printing material removing mechanism 60 of the embodiment. Further, similarly, the leading end of the sheet 4 that has passed through the separation area 92 is sandwiched between the second rollers 70 and 72, and is conveyed toward the drying device 20.

Thereafter, the rear end of the sheet 4 is
When the detection is made in step 8, the control device 84 does not stop the driving of the DC motor 106 but temporarily stops the driving of the motor 82 alone. Next, the control device 84 controls the rotating brushes 76 and 78 to rotate in the dotted line direction of FIG.
Apply force in the direction opposite to the sheet conveying direction to the rotating brushes 76, 7
8), the rotation direction of the DC motor 106 is switched (that is, brought into the second state). Subsequently, after the rotation speed of the motor 106 reaches the target rotation speed, the control device 8
4 drives the motor 82 again, and the rollers 64, 66, 7
0 and 72 are rotated in the solid line direction in FIG. As a result, a force in the direction opposite to the sheet conveyance direction acts on the portion of the sheet 4 between the separation area 92 and the second rollers 70 and 72. As a result, the sheet portion that has passed between the first rollers does not wrap around the rotating brushes 76, 78 or jam between the rotating brushes 76, 78 and the second rollers 70, 72.

As described above, in the printing material removing mechanism 94 of the second embodiment, the first and second rollers 64, 66, 70,
While the rotation of 72 is temporarily stopped, unlike the case of the printing material removing mechanism 60 of the embodiment of FIG. 2, the rotating brushes 76 and 78 only switch the rotating direction and do not stop the rotating operation. Therefore, the prevention of the occurrence of unevenness in the removal of the printing material becomes more effective.

The rear end of the sheet 4 is provided with rotating brushes 76, 78.
When the trailing end is detected by the second sensor 90 from the separation area 92 of the second brush 70 and the second brush 90 and the second sensor 90, the control device 84 controls the motor 82 and the DC motor 106.
Is stopped, and the rollers 64, 66, 70, 72 and the rotating brushes 76, 78 are stopped. Thereafter, when the next sheet passes through the wet portion 30 and the leading edge of the sheet is detected by the first sensor 88, the control device 84
The DC motor 106 is again set and driven so that the rollers 6 and 78 rotate again in the direction indicated by the arrow in FIG. 4 (that is, the sheet receives a force in the forward direction of the sheet from the rotating brush) ( That is, the first state is set again). At the same time, the control device 84 drives the motor 82 again to rotate the rollers 64, 66, 70, 72 in the directions indicated by the arrows in FIG. Thereafter, the above-described removing operation is repeated.

In the above description, the recording medium is coated in advance with a water swelling film, an image is printed on the recording medium, and a cleaning liquid containing no organic solvent is jetted immediately before and during the removal of the printing material. A well-known water swellable film brushing type regenerating apparatus that removes a printing material by a brush roller while performing the regenerating operation has been mainly described. In the reproducing device 2, the humidification time for the recording medium can be short, and a mixture of water and a surfactant can be used as a cleaning liquid, and there is no need to use an organic solvent. On the other hand, as disclosed in JP-A-7-121072, after the recording medium is immersed in a cleaning liquid containing an organic solvent for a certain period of time, the above-described printing material removing mechanisms 60 and 94 may be used. The printing material can be removed, and "paper breakage" can be prevented by switching the rotating direction of the rotating brush.

[0034]

As is apparent from the above description, the recording medium reproducing apparatus of the present invention has the following effects.

In a reproducing apparatus for removing a printing material from a recording medium on which an image is printed in a process in which the recording medium is conveyed in a predetermined direction, the printing material is removed from a surface layer of the recording medium swollen by using a cleaning liquid. A first brush roller for scraping by its own rotation, a rotating means for providing a rotational drive to the first brush roller, and a control unit for controlling a rotating direction of the rotating means; When scraping the printing material at the front end, the rotation direction of the first brush roller is a direction for transporting the recording medium in the transport direction, and when scraping the printing material at the rear end in the transport direction of the recording medium. The rotation direction of the first brush roller is a direction that hinders the conveyance of the recording medium in the conveyance direction, and the control unit controls switching between the two rotation directions. The reproducing apparatus that the recording medium, does not cause "folding paper" during scraping printing material of the front end or the rear end portion of the recording medium even poor rigidity of the recording medium.

In the reproducing apparatus, a second brush roller is disposed opposite to the first brush roller with the recording medium conveyance path interposed therebetween, and holds the conveyed recording paper together with the first brush roller. The printing medium is swept by its own rotation from the surface layer of the recording medium swollen by the use of the cleaning liquid, and the printing material at the front end in the conveyance direction of the recording medium is rotated by the rotation means. Is the direction in which the recording medium is transported in the transport direction, and when the printing material at the rear end of the recording medium in the transport direction is scraped, the rotational direction of the second brush roller is the recording medium. If the control unit controls the switching between the two rotation directions, the printing material on both sides of the recording medium can be scraped off. And not to be poor rigidity of the recording medium at the time of scraping the printing material of the front end or the rear end portion of the recording medium caused to "fold paper".

Further, in these reproducing apparatuses, if the control section stops the conveyance of the recording medium for a predetermined time when the rotation direction of the brush roller is switched, unevenness in removing the printing material is less likely to occur.

In these reproducing apparatuses, the relative difference between the moving speed of the bristle tip of the brush roller and the conveying speed of the recording medium is made constant (or more), and the brush roller is swollen by using the cleaning liquid by using the difference. If the printing material is scraped from the surface layer of the recording medium, the printing material can be more clearly scraped off, and even if the rigidity of the recording medium is low, the printing material at the front end or the rear end of the recording medium is scraped. Occasionally, "paper folding" does not occur.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration of a reproducing apparatus using the present invention.

FIG. 2 is a schematic configuration diagram of a printing material removing mechanism according to the first embodiment.

FIG. 3 is a schematic configuration diagram of a printing material removing mechanism according to a second embodiment.

FIG. 4 shows the movement of each roller when the front end of the recording medium is removed.

FIG. 5 shows the movement of each roller when the rear end of the recording medium is removed.

FIG. 6 shows the movement of each roller when the trailing edge of the recording medium is removed in the present invention.

[Explanation of symbols]

2 ... reproducing device, 4 ... sheet, 6 ... supply device, 8 ... supply roller, 10 ... conveyance path, 12, 1
6, 28: conveying roller pair, 14: printing material removing section, 20: drying device, 22: discharge roller, 24
... discharge unit, 26 ... tank, 28 ... cleaning liquid,
30 ... wet part, 32 ... separation part, 34, 36 ...
· Housing, 38, 40 · · · ceiling, 42, 44 ·
..Shower holes, 46, 50 ... conduits, 48 ... pumps, 52 ... filters, 54, 56 ... valves, 6
0, 94: printing material removing mechanism, 62: sheet conveying path, 64, 66, 70, 72: roller, 68,
74: roller pair, 76, 78: rotating brush, 8
2 ... motor, 84 ... control device, 86 ... rotation switching mechanism, 88, 90 ... sensor, 92 ... separation area, 96, 98 ... clutch, 106 ... DC motor

Claims (7)

[Claims] 1. A reproducing apparatus for removing a printing material forming an image from a recording medium on which an image is printed in a process in which the recording medium is transported in a predetermined direction. A first brush roller that scrapes the printing material from the surface layer of the recording medium by its own rotation, a rotating unit that provides rotational driving to the first brush roller, and a control unit that controls a rotating direction of the rotating unit. When scraping the printing material at the front end in the transport direction of the recording medium, the rotation direction of the first brush roller is a direction in which the recording medium is transported in the transport direction, and the transport direction of the recording medium. When the printing material at the rear end is scraped, the rotation direction of the first brush roller is a direction that hinders the conveyance of the recording medium in the conveyance direction, and switching between the two rotation directions is performed. An apparatus for reproducing a recording medium, wherein the apparatus is controlled by the control unit. A second brush roller disposed opposite to the first brush roller with a recording medium conveyance path interposed therebetween;
The recording paper to be conveyed is sandwiched together with the first brush roller, and is rotated by the rotating means, and the printing material is scraped by its own rotation from the surface layer of the recording medium swollen by the use of the cleaning liquid. When scraping the printing material at the front end in the conveying direction of the recording medium, the rotation direction of the second brush roller is a direction in which the recording medium is conveyed in the conveying direction, and the rear end of the recording medium in the conveying direction. When the printing material is scraped off, the rotation direction of the second brush roller is a direction that hinders the conveyance of the recording medium in the conveyance direction, and the switching between the two rotation directions is controlled by the control unit. The playback device according to claim 1. 3. The reproducing apparatus according to claim 1, wherein the control unit stops the conveyance of the recording medium for a predetermined time when the rotation direction of the brush roller is switched. 4. The printing material is removed from the surface layer of the recording medium swollen by the use of a cleaning liquid based on a relative difference between a moving speed of a bristle tip of the brush roller and a conveying speed of the recording medium. The reproducing apparatus according to claim 1, 2, or 3, wherein the reproducing apparatus scrapes. 5. A brush roller is rotated by itself when a printing material is conveyed in a predetermined direction from a recording medium on which an image is printed, from a surface layer of the recording medium swollen by use of a cleaning liquid. When the front end of the recording medium in the transport direction is inserted into the removal area of the brush roller, the brush roller rotates in a direction in which the brush roller transports the recording medium in the transport direction. A first step, when the trailing end of the recording medium in the transport direction is inserted into the removal area of the brush roller, the brush roller is moved in a direction in which the brush roller prevents the transport of the recording medium in the transport direction. And a second step of rotating the recording medium. 6. The reproducing method according to claim 5, wherein the transport of the recording medium is stopped for a predetermined time when switching between the first step and the second step or between the second step and the first step. 7. The printing material is scraped from the surface layer of the recording medium swollen by the use of a cleaning liquid based on a relative difference between the speed of the tip of the brush roller and the conveying speed of the recording medium. Claim 5, claim 5 or claim 6
How to play.