JPH07261612A - Image erasing device - Google Patents

Abstract

PURPOSE:To provide an image erasing device capable of saving the handling time of classifying work on a user side and making work efficient by preventing the coexistence of a transfer paper (recycled paper) after being processed to remove toner with an unprocessed transfer paper, after their election. CONSTITUTION:An image detecting sensor 22 detecting the presence of the toner on the side of the nonprocessed surface B of the transfer paper 2 is disposed on the downstream side of a toner peeling means 5, a paper separating means 23 changing a direction where the transfer paper 2 is ejected in accordance with the detection of the presence of the toner on the side of the nonprocessed surface B is disposed on the downstream side of a drying means 6 as well and a first paper ejecting tray 25 into which the unprocessed transfer paper 2 after the presence of the toner on the nonprocessed surface B is detected is ejected and a second paper ejecting tray 26 into which the transfer paper 2 after the absence of the toner on the nonprocessed surface B is detected and image erasing processing is executed is ejected are independently provided on the downstream side of the paper separating means 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image erasing apparatus for erasing a toner image from a transfer sheet formed by an image forming apparatus such as a copying machine, a facsimile or a printer to obtain recycled paper.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of resource conservation by maintaining confidentiality and recycling, there has been an increasing demand for an image erasing device that erases and reproduces an image in an office without taking confidential documents or general printed sheets out. There is. An example of the image erasing device will be described with reference to FIG. The apparatus main body 1 includes a paper feed unit 3 for feeding the transfer paper 2, a wetting unit 4 as a wetting means for wetting the toner on the surface of the fed transfer paper 2, and a transfer paper after the wetting. A toner peeling unit 5 as a toner peeling unit that heats 2 to peel off the toner adhering to the paper surface, and a drying unit 6 as a drying unit that dries the wet transfer paper 2 after the toner is peeled off. Be divided. Transfer paper 2 after drying
Can be used as recycled paper.

In this case, in the paper feed unit 3, a paper feed tray 7 partially protruding from the side surface of the main body and the paper feed tray 7 are provided.
A paper feed roller 8 for feeding the above-mentioned transfer paper 2 after printing,
A transport path 9, a transport roller 10 and the like are provided. In the wetting unit 4, a treatment liquid 11, a coating roller 12, a carrying roller 13 and the like are provided. In the toner peeling unit 5, a pair of toner peeling rollers 15 having a heater 14 built therein, a separation claw 16 in contact with the toner peeling rollers 15, a cleaning roller 17 and the like are provided.
In the drying unit 6, a drying roller 18 having a heater 14 built therein, a pressure roller 19 in contact with the drying roller 18, and the like are provided. A discharge tray 21 for storing a recycled paper 20 obtained by drying the transfer paper 2 after toner separation is provided outside the main body on the downstream side of the drying unit 6. As a result, the transfer paper 2 after printing is first moistened in the moistening unit 4, then the toner on the paper surface is erased in the toner peeling unit 5, and the toner is erased and remains moist. The transfer paper 2 is dried in the drying unit 6 and is discharged onto the paper discharge tray 21 as recycled paper 20. The image erasing process can be performed by such a series of operations.

[0004]

In the image erasing apparatus as described above, when the image is erased, first the transfer paper 2
If you set it on the paper feed tray 7 with the surface (hereinafter called the processing surface) of the side (the confidential document or general printed paper) from which the image is to be erased facing downward, the image will be erased without any problems. It can be performed. However, if the user mistakenly sets the paper in the opposite direction, that is, with the surface opposite to the surface on which the image is to be erased (hereinafter referred to as the non-processing surface) facing downward, the processing surface on the discharge tray 21 is The image on the side is discharged without being erased. This allows the user to
After the sheet is discharged, the recycled paper 20 on which the image has been erased and the transfer paper 2 on which the image has not been erased are sorted, only the unerased transfer paper 2 is set again, and the image erasing process must be performed again. I have to. Such sorting and resetting processes are wasteful work for the user, work efficiency is poor, and wasteful power is consumed, which is uneconomical.

Further, instead of the transfer paper 2 for single-sided copying,
When an image erasing process is performed using the double-sided copy transfer paper 2, the conventional image erasing apparatus first performs the image erasing process on only one side, and then takes out the transfer paper 2 from the paper discharge tray 21 and then The image erasing process must be performed by resetting the other side of the image not erased side down on the paper feed tray 7, and a total of two image erasing operations are required, resulting in work efficiency. Bad and uneconomical.

[0006]

According to the first aspect of the invention, the toner on the treated surface side of the transfer paper is moistened by the moistening means, and the moistened treated surface of the transfer paper is heated by the toner peeling means. In an image erasing apparatus capable of obtaining the transfer paper as recycled paper by peeling off the toner adhering to the surface and drying the transfer paper that has been wet after the toner is peeled off by drying means, An image detection sensor for detecting the presence / absence of toner on the non-processing surface side of the transfer paper is arranged downstream of the toner peeling means, and the transfer is performed according to the detected presence / absence of toner on the non-processing surface side. A first paper discharge tray for arranging a paper separating means for changing the paper discharge direction on the downstream side of the drying means, and discharging the unprocessed transfer paper detected to have toner on the non-processed surface; Detects no toner on the non-treated surface Re transfer sheet on which the image erasing process has been performed is provided independently and the second paper discharge tray to be discharged to the downstream side of the sheet separating means.

According to the second aspect of the invention, the toner on the treated surface side of the transfer paper is moistened by the moistening means, and the moistened treatment surface of the transfer paper is heated by the toner peeling means to remove the toner adhering to the surface. In an image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying the transfer paper after drying by a drying means, the transfer paper is not treated. An image detection sensor for detecting the presence / absence of toner on the surface side is arranged downstream of the toner peeling means, and the paper separating means for changing the discharge direction of the transfer paper according to the presence / absence of toner on the non-processing surface side. Is disposed on the downstream side of the toner peeling means, and a reversing means for reversing the transfer paper detected by the paper separating means as having toner on the non-processing surface side is provided between the paper separating means and the upstream side of the wetting means. Arranged between It was.

According to the third aspect of the invention, the toner on the treated surface side of the transfer paper is wetted by the wetting means, and the treated surface of the transfer paper after the wetting is heated by the toner peeling means to remove the toner adhering to the surface. In the image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying it by a drying means, and then discharging the paper, a treated surface of the transfer paper. An image detection sensor for detecting the presence or absence of toner on the side is disposed on the paper feed side upstream of the wetting means, and the paper separating means for changing the discharge direction of the transfer paper according to the presence or absence of toner on the processing surface side. Is disposed in the transport path upstream of the wetting means, and a dedicated discharge path for transporting the transfer paper, which has been detected by the paper separating means as having no toner, is provided downstream of the paper separating means and the drying means. Placed between Untreated number counting display means for displaying by counting the number of transfer sheets unprocessed passing through the paper discharge dedicated route is disposed.

According to the fourth aspect of the present invention, the toner on the processed surface side of the transfer paper is wetted by the wetting means, and the wetted processing surface of the transfer paper is heated by the toner peeling means to remove the toner adhering to the surface. In the image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying it by a drying means, and then discharging the paper, a treated surface of the transfer paper. An image detection sensor for detecting the presence or absence of toner on the side is disposed on the paper feed side upstream of the wetting means, and the paper separating means for changing the discharge direction of the transfer paper according to the presence or absence of toner on the processing surface side. Is provided in the transport path upstream of the wetting means, and a dedicated sheet discharge path for transporting the transfer paper detected by the paper separating means as having no toner on the processing surface side is provided in the vicinity of the downstream of the paper separating means and the drying means. Between the position of The first discharge tray, which is provided, discharges the transfer paper on which the image erasing process is performed by detecting the presence of toner on the processing surface and the unprocessed transfer paper which is detected on the processing surface by the absence of toner. An unprocessed sheet number counting and displaying means for independently providing a second sheet discharge tray for discharging the sheet through the sheet discharge exclusive path and counting and displaying the number of unprocessed transfer sheets passing through the sheet discharge exclusive path is provided. Arranged.

According to the fifth aspect of the present invention, the toner on the processed surface side of the transfer paper is wetted by the wetting means, and the wetted processing surface of the transfer paper is heated by the toner peeling means to remove the toner adhering to the surface. In the image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying it by a drying means, and then discharging the paper, a treated surface of the transfer paper. An image detection sensor for detecting the presence or absence of toner on the side is disposed on the paper feed side upstream of the wetting means, and the paper separating means for changing the discharge direction of the transfer paper according to the presence or absence of toner on the processing surface side. Is disposed in the conveying path upstream of the wetting means, and a reversing means for reversing the transfer paper detected by the paper separating means as having no toner on the processing surface side is arranged in the vicinity of the paper separating means.

According to the sixth aspect of the present invention, the toner on the processed surface side of the transfer paper is wetted by the wetting means, and the wetted processing surface of the transfer paper is heated by the toner peeling means to remove the toner adhering to the surface. In an image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying the transfer paper after drying by a drying means, the transfer paper is not treated. An image detection sensor for separately detecting the presence / absence of toner on the processing surface and the processing surface is provided on the paper feed side upstream of the wetting means, and the transfer paper is transferred depending on the presence / absence of toner on the non-processing surface and the processing surface. A first sheet separating means for changing the sheet discharging direction of the first sheet separating means is disposed in the conveying path upstream of the wetting means, and the first sheet separating path for conveying the transfer sheet separated by the first sheet separating means is the first sheet discharging means. Paper separating means and the above The second paper separating means, which is arranged between the drying means and a position near the downstream side, and which changes the discharge direction of the transfer paper according to the detected presence or absence of toner on the non-processed surface and the processed surface, One end of the sheet discharge path and the downstream side of the drying means are provided so as to communicate with each other, and the transfer sheet is discharged to the downstream side of the second sheet separating means according to the presence / absence of toner. The first paper ejection tray and the second paper ejection tray are provided independently.

According to the seventh aspect of the present invention, the toner on the processed surface side of the transfer paper is moistened by the moistening means, and the moistened transfer paper surface is heated by the toner peeling means to remove the toner adhering to the surface. In an image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying the transfer paper after drying by a drying means, the transfer paper is not treated. An image detection sensor for separately detecting the presence / absence of toner on the processing surface and the processing surface is provided on the paper feed side upstream of the wetting means, and the transfer paper is transferred depending on the presence / absence of toner on the non-processing surface and the processing surface. First paper separating means for changing the paper discharge direction of the first paper separating means is disposed downstream of the toner separating means, and a reversing means for inverting the transfer paper separated by the first paper separating means is the first paper separating means. Means and said wetting The second paper separating means, which is arranged between the upstream side of the step and changes the paper discharge direction of the transfer paper according to the presence / absence of toner on the non-processing surface and the processing surface, is conveyed upstream of the wetting means. It was arranged at a position where the path and the inverting means meet.

[0013]

According to the first aspect of the present invention, the transfer paper, which has been detected as having toner on the non-processing surface opposite to the processing surface, is separated by the paper separating means and is discharged to the first discharge tray for processing. The transfer paper, which has been detected as having no toner on the non-processed surface on the opposite side of the surface, is separated by the paper separating means and discharged to the second discharge tray, so that the transfer paper with the image remaining on one side and the image on both sides It is possible to separate the blank transfer sheet that does not exist and discharge the sheet.

According to the second aspect of the present invention, the transfer paper, which has been detected as having toner on the non-processed surface opposite to the processed surface, is separated by the paper separating means and guided to the reversing means. By becoming the target surface for toner removal and sequentially performing the toner removal processing by sending again from the wetting means,
Even when set in the opposite direction, it is possible to eliminate the discharge of unprocessed transfer paper.

According to the third aspect of the present invention, the transfer paper, which has been detected as having no toner on the processing surface opposite to the non-processing surface, is separated by the paper separating means and guided to the paper discharging path, and the paper discharging path. By directly discharging the sheets from the sheet discharge tray, it is possible to eliminate unnecessary erasing processing operation when the sheet is set in the opposite direction. In addition, by counting the number of unprocessed transfer papers that pass through the discharge-only path, the user can find the number of unprocessed transfer papers on the paper discharge tray in addition to the transfer papers that have been double-sided processed. It becomes possible to know whether there is.

According to another aspect of the present invention, the transfer paper, which has been detected as having toner on the processing surface opposite to the non-processing surface, is
After performing the normal image erasing process, the paper is ejected onto the first paper ejection tray, while the transfer paper detected as having no toner on the processing surface opposite to the non-processing surface is separated by the paper separating means. Guides the paper to the dedicated paper discharge path, and discharges onto the second paper discharge tray from this dedicated paper discharge path to sort unprocessed transfer paper and processed transfer paper when set in the opposite direction. Can be discharged.

In a fifth aspect of the present invention, the transfer paper, which is detected as having no toner on the processing surface opposite to the non-processing surface, is first separated by the paper separating means and guided to the reversing means, and the non-processing surface is reversed by the reversing means. The target side for toner removal is to sequentially send the toner from the wetting means, perform toner removal processing, and discharge the paper onto the paper discharge tray to discharge the unprocessed transfer paper when set in the opposite direction. It becomes possible to prevent the deterioration of the paper as well as to eliminate.

According to the sixth aspect of the present invention, the presence or absence of toner on both sides of the transfer paper is checked by using two image detection sensors, and the transfer paper is passed to the first paper separating means and the second paper separating means, respectively. By separately ejecting the sheets, it becomes possible to eliminate the user's sorting work for the unprocessed transfer sheet and the processed transfer sheet.

According to the seventh aspect of the present invention, the presence or absence of toner on both sides of the transfer sheet is checked using two image detection sensors, and when the non-processed surface and the processed surface are set in opposite directions, The transfer paper is separated by the second paper separating means and is once guided to the reversing means to be reversed, and then sent to the wetting means to sequentially perform the image erasing process. After performing the image erasing process, the transfer paper is separated by the first paper separating device, guided to the reversing device, inverted, and sent again to the wetting device to sequentially perform the image erasing process so that the transfer paper is set in one direction and set. Further, even if there are images on both sides, it is possible to erase the images on both sides with a single operation.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention described in claim 1 will be described with reference to FIGS. The above-mentioned conventional example (see FIG. 17)
The description of the same parts as those of the reference) will be omitted, and the same reference numerals will be used for the same parts. In the present embodiment, in the image erasing apparatus as shown in FIG. 1, first, on the downstream side of the toner peeling unit 5, the toner on the non-processing surface B (the surface facing upward in the paper feed tray 7) side of the transfer paper 2 is arranged. An image detection sensor 22 for detecting the presence or absence of An image sensor such as a CCD line sensor can be used as the image detection sensor 22. When the CCD line sensor is used, the length is set to be equal to or wider than the width of the transfer paper 2. The CCD line sensor and the reduction optical system may be combined to reduce the size. Further, on the downstream side of the drying unit 6, there is provided a separation unit 23 as a paper separation unit that changes the discharge direction of the transfer paper 2 according to the detected presence or absence of toner on the non-processing surface B side. ing. A separation claw 24 is provided on the top of the separation unit 23.
Further, on the downstream side of the separation unit 23, there is a first paper discharge tray 25 for discharging the unprocessed transfer paper 2 which has been detected to have toner on the non-processed surface B, and no toner on the non-processed surface B. A second paper discharge tray 26, from which the detected transfer paper 2 that has undergone image erasing processing is discharged as recycled paper 20, is provided independently in the vertical direction.

The operation of the present apparatus having such a configuration will be described with reference to the flowchart of FIG. First, when the user presses a start switch (not shown), the transfer paper 2
Is fed from the paper feed tray 7 and sent from the wetting unit 4 to the toner peeling unit 5, and the toner peeling roller 15
Thus, the toner removal processing is performed (a). After this toner removal processing, the image detection sensor 22 arranged on the upper side of the transport path 9 detects the image (toner) on the non-processed surface B (b), and the presence or absence of the image is determined by this (c). . When the presence of an image is detected, the electromagnetic solenoid 27
The direction of the separation claw 24 in the separation unit 23 is controlled by (see FIG. 15 described later), and the transfer paper 2 sent from the drying unit 6 into the separation unit 23 is discharged to the upper first discharge tray 25. (D). On the other hand, when the absence of an image is detected, the direction of the separation claw 24 in the separation unit 23 is controlled by the electromagnetic solenoid 27, and the transfer paper 2 is discharged to the lower second discharge tray 26 (e). As a result, the transfer paper 2 having an image on one surface (non-processing surface B) is stored in the first paper ejection tray 25, and both surfaces (processing surface A, non-processing surface B) are stored in the second paper ejection tray 26. In this case, the transfer paper 2 having no image, that is, the recycled paper 20 is stored.

As described above, the transfer paper 2 having an image on one side and the transfer paper 2 having no image on both sides, that is, the recycled paper 20 are separately discharged to separate discharge trays 25 and 26. Even when the processing surface A and the non-processing surface B of the transfer paper 2 are set on the paper feed tray 7 in the opposite directions, or the transfer paper 2 copied on both sides is set,
It is possible to eliminate a mixture of the transfer paper 2 having an image formed on one side and the transfer paper 2 having no image formed on both sides.
This saves the user the trouble of sorting the transfer sheets 2 and improves the work efficiency.

Next, an embodiment of the invention described in claim 2 will be described with reference to FIGS. 3 and 4. The description of the same parts as those of the embodiment of the invention described in claim 1 (see FIG. 1) is omitted, and the same reference numerals are used for the same parts. In this embodiment, in the image erasing apparatus as shown in FIG. 3, first, an image detection sensor 22 for detecting the presence or absence of toner on the non-processing surface B side of the transfer paper 2 is arranged downstream of the toner peeling unit 5. It is set up. Further, on the downstream side of the toner peeling unit 5 provided with the image detection sensor 22, separation as a paper separating unit that changes the discharge direction of the transfer paper 2 according to the presence or absence of toner on the non-processing surface B side. Nail 28
Is provided. Between the separating claw 28 and the conveying path 9 on the upstream side of the wetting unit 4, a reversing unit 29 as a reversing unit for reversing the transfer paper 2 detected by the separating claw 28 as having toner on the non-processing surface B side. Is provided. The reversing unit 29 is composed of a reversing path 30 for reversing and conveying the transfer paper 2, a switching claw 31, and a reversing roller 32. In this way, the reversing unit 29 is reversed by a general switchback mechanism.

The operation of the present apparatus having such a configuration will be described with reference to the flowchart of FIG. When the user presses the start switch, first the flag i of the first processing is
= 0 is set (a), the transfer paper 2 is the wetting unit 4,
The toner is sequentially sent to the toner peeling unit 5 to perform the toner removal processing on the processing surface A side (b). At this time, flag i
Since it is not = 1 (c), the presence or absence of an image (toner) on the non-processing surface B side is detected by the image detection sensor 22 (d),
As a result, the presence / absence of an image is determined (e). When the presence of an image is detected, the direction of the separation claw 28 is controlled by the electromagnetic solenoid 60 (see FIG. 16 described later), and the transfer paper 2 is conveyed into the reversing path 30. This transfer paper 2 is sent to the position of the reversing roller 32 by the switching claw 31 and reversed (f),
It is input from the wetting unit 4 again, and this time, the toner removal processing on the non-processing surface B side is performed. Since the flag i = 1 is set for this second toner removal process,
The image is not detected by the image detection sensor 22, the direction of the separation claw 28 is controlled, and the transfer paper 2 is discharged from the drying unit 6 to the paper discharge tray 21 (g). Also, flag i = 0
When the absence of an image on the non-processed surface B side is detected while being set to, the transfer paper 2 is discharged from the drying unit 6 to the paper discharge tray 21 without being guided to the reverse path 30. As a result, it is possible to obtain the recycled paper 20 with both sides (non-processed surface B, processed surface A) of the image erased on the paper discharge tray 21.

As described above, the transfer paper 2 detected as having toner on the non-processed surface B is sent to the reversing unit 29, and the non-processed surface B side is subjected to the image erasing process again with the non-processed surface B side as the target surface for toner removal. Even when the processed surface A and the non-processed surface B are set in opposite directions or the double-sided copy transfer paper 2 is set, the transfer paper 2 whose images are erased on both sides can be discharged. Thus, it is possible to save the user the trouble of resetting the image and performing the image erasing process again, and it is possible to improve work efficiency.

Next, an embodiment of the invention described in claim 3 will be described with reference to FIGS. The description of the same parts as those of the embodiments of the invention described in claims 1 and 2 (see FIGS. 1 and 3) is omitted, and the same parts are designated by the same reference numerals. In this embodiment, in the image erasing apparatus as shown in FIG. 5, first, at the position on the paper feed side upstream of the wetting unit 4, an image detection sensor for detecting the presence or absence of toner on the processing surface A side of the transfer paper 2. 22 are provided. In addition, a separation claw 33 as a sheet separation unit that changes the discharge direction of the transfer sheet 2 according to the presence / absence of toner on the processing surface A side is provided in the transport path 9 upstream of the wetting unit 4. . Between the separation claw 33 and the downstream side of the drying unit 6, the unprocessed transfer paper 2 which is detected by the separation claw 33 as having no toner on the processing surface A side is directly conveyed to the discharge tray 21. A path 34 is provided. An unprocessed number display section 35 as an unprocessed number counting display unit for counting the number of unprocessed transfer sheets 2 passing through this path and displaying the number is provided on the operation display unit above the sheet discharge path 34. It is provided in 36. The switching claw 3 for changing the sheet discharge direction is provided at a position where the sheet discharge path 34 and the drying unit 6 meet.
4a is provided.

The operation of the present apparatus having such a configuration will be described with reference to the flowchart of FIG. When the user presses the start switch, the number of unprocessed sheets i is set to i = 0 (a), and the transfer paper 2 is fed from the paper feed tray 7. The image detection sensor 22 detects the surface state of the transfer paper 2 on the processing surface A side (b), and the presence / absence of an image is determined by this (c). When the presence of an image is detected, the transfer paper 2 advances straight as it is, passes through the wetting unit 4, the toner peeling unit 5, and the drying unit 6 in order to erase the image (d), and is discharged onto the paper discharge tray 21 ( e), which allows it to be used as recycled paper 20. On the other hand, when the absence of an image is detected, the direction of the separation claw 33 is controlled by the electromagnetic solenoid 27 (see FIG. 15, which will be described later), and the transfer sheet 2 is guided into the sheet discharge path 34. At this time, the value of the unprocessed number i is counted (f), and the value of the unprocessed number i (i = i + 1) is displayed on the unprocessed number display section 35 (g). After that, the transfer sheet 2 is discharged from the dedicated discharge path 34 onto the discharge tray 21 according to the direction of the switching claw 34a (e). As a result, the regenerated paper 20 with the image erased and the unprocessed transfer paper 2 are mixed in the same paper discharge tray 21, but the user does not know what the unprocessed transfer paper 2 is from the unprocessed sheet number display section 35. You can know if there is one.

As described above, the unprocessed transfer paper 2 is directly discharged from the discharge-only path 34 onto the paper discharge tray 21, so that the processed surface A and the non-processed surface B of the transfer paper 2 are opposite to each other. When it is set to, the extra image erasing operation can be eliminated, and unnecessary deterioration of the paper can be prevented. Further, the user can know how many unprocessed transfer papers 2 were included in the processed transfer papers, and the sorting work can be efficiently performed.

Next, an embodiment of the invention described in claim 4 will be described with reference to FIGS. 7 and 8. The description of the same parts as those of the embodiments of the invention described in claims 1 to 3 (see FIGS. 1, 3 and 5) is omitted, and the same parts are designated by the same reference numerals. This embodiment is a modification of the configuration of the portion provided with the paper discharge tray 21 in the embodiment of the invention described in claim 3 (see FIG. 5). That is, in the image erasing apparatus as shown in FIG. 7, the first paper ejection tray 37, from which the transfer paper 2 which has been subjected to the image erasing processing due to the presence of toner on the processing surface A is ejected, is placed downstream of the drying unit 6. And the unprocessed transfer paper 2 detected as having no toner on the processing surface A is discharged through the discharge-only path 34, and the second discharge tray 38 is connected to the end of the discharge-only path 34. Provided. It should be noted that description of other identical configurations will be omitted.

The operation of the present apparatus having such a configuration will be described with reference to the flowchart of FIG. When the user presses the start switch, the transfer paper 2 is fed from the paper feed tray 7, and the surface state of the processing surface A of the transfer paper 2 is detected by the image detection sensor 22 (a). Is performed (b). When the presence of an image is detected, the transfer paper 2 advances straight as it is, passes through the wetting unit 4, the toner peeling unit 5, and the drying unit 6 in order to perform an image erasing process (c), and is discharged onto the first paper discharge tray 37. It is printed (d) and can be used as recycled paper 20. On the other hand, when the absence of an image is detected, the direction of the separation claw 33 is controlled by the electromagnetic solenoid 27 (see FIG. 15, which will be described later), whereby the transfer sheet 2 is guided into the sheet discharge path 34 and conveyed, and the end thereof. To second output tray 3
8 (e).

As described above, the two discharge trays 37,
By providing 38, the unprocessed transfer paper 2 and the recycled paper 20 that has been subjected to the image erasing process are not mixed, so that the sorting work by the user is eliminated and the work efficiency can be improved. . Further, when the processed surface A and the non-processed surface B of the transfer paper 2 are set in the opposite directions, it is possible to eliminate an unnecessary image erasing operation and prevent the paper from being deteriorated more than necessary. You can

Next, an embodiment of the invention described in claim 5 will be described with reference to FIGS. 9 and 10. The embodiments of the invention described in claims 1 to 4 described above (see FIGS. 1, 3, 5, and 7).
The description of the same parts as those of is omitted, and the same reference numerals are used for the same parts. In the present embodiment, in the image erasing device as shown in FIG. 9, first, at the position on the paper feed side upstream of the wetting unit 4, an image detection sensor for detecting the presence or absence of toner on the processing surface A side of the transfer paper 2. 22 are provided. In addition, in the transport path 9 upstream of the wetting unit 4, separation claws 39a, 39 as paper separation means for changing the discharge direction of the transfer paper 2 according to the presence / absence of toner on the processing surface A side.
Two b are arranged. At the positions of the separating claws 39a and 39b, a reversing unit 4 as a reversing unit for reversing the transfer paper 2 detected as having no toner on the processing surface A side.
0 is provided. The reversing unit 40 includes a reversing path 41 for reversing and conveying the transfer paper 2 and a reversing roller 42.
It consists of In this way, the reversing unit 40 is reversed by a general switchback mechanism.

The operation of the present apparatus having such a configuration will be described with reference to the flowchart of FIG. When the user presses the start switch, the transfer paper 2 is fed from the paper feed tray 7.
Is fed, and the surface state of the fed transfer sheet 2 on the processing surface A side is detected (a), and the presence / absence of an image is determined by this (b). When the presence of an image is detected, the transfer paper 2 advances straight as it is, the wetting unit 4, the toner peeling unit 5,
The image is erased by sequentially passing through the drying unit 6 (c), and is discharged onto the discharge tray 21 (d), so that it can be used as recycled paper 20. On the other hand, when the absence of an image is detected, the direction of the separation claw 39a is controlled by the electromagnetic solenoid 60 (see FIG. 16, which will be described later), the transfer sheet 2 is guided into the reversing path 41, is fed backward by the reversing roller 42, and the reversing process is performed. Step (e) is carried out, and this time it is guided from the transport roller 10 into the wetting unit 4 according to the direction of the separating claw 39b, and the image erasing process is performed in the same manner as described above and the sheet is discharged onto the sheet discharge tray 21. .

As described above, the transfer paper 2 detected as having no toner on the processing surface A is sent to the reversing unit 40 to be subjected to the reversing processing, and the non-processing surface B side is subjected to the image erasing processing with the target surface for toner removal. As a result, even when the processed surface A and the non-processed surface B of the transfer paper 2 are set in opposite directions, the image erasing process can be reliably performed. As a result, it is possible to save the user the trouble of resetting the sheet on the sheet feed tray 7 and performing the image erasing process again, and it is possible to improve the work efficiency.

Next, an embodiment of the invention described in claim 6 will be described with reference to FIGS. 11 and 12. The embodiments of the invention described in claims 1 to 5 (FIGS. 1, 3, 5, 7, 9)
The description of the same parts as those of the reference) will be omitted, and the same reference numerals will be used for the same parts. In this embodiment, FIG.
In the image erasing apparatus as shown in FIG. 1, first, an image detection sensor 22 for detecting the presence / absence of toner on the processing surface A and the non-processing surface B of the transfer paper 2 is provided at a position on the paper feed side upstream of the wetting unit 4. Are arranged two above and below. A separation claw serving as a first paper separation unit that changes the paper discharge direction of the transfer paper 2 according to the presence / absence of toner on the processed surface A and the non-processed surface B is provided on the transport path 9 upstream of the wetting unit 4. 33 are provided. Between the separating claw 33 and the downstream side of the drying unit 6, a sheet discharge dedicated path 34 for conveying the transfer sheet 2 separated by the separating claw 33 is provided. Between one end of the sheet discharge path 34 and the downstream side of the drying unit 6,
A separation unit 43 is provided as a second sheet separation unit. A first paper ejection tray 37 and a second paper ejection tray 38 are independently provided in the vertical direction on the downstream side of the separation unit 43. Separation claws 44a and 44b are vertically provided in the separation unit 43. Separation claw 44
By changing the direction of a and 44b
4, one end of the drying unit 6, the downstream side of the drying unit 6, the first paper discharge tray 37, and the second paper discharge tray 38 communicate with each other. Since the present embodiment is partly similar in configuration to the embodiments (see FIGS. 5 and 7) of the invention described in claims 3 and 4, the description of the same parts will be omitted.

The operation of this apparatus having such a configuration will be described with reference to the flowchart of FIG. When the user presses the start switch, the transfer paper 2 is fed from the paper feed tray 7.
Is fed, and the upper and lower two image detection sensors 22 detect the surface states of the processed surface A and the non-processed surface B of the transfer paper 2 (a). In this case, the detection state of the image is as follows: Toner removal processing surface A side ... Image present (1) Toner removal processing surface A side ... No image (0) Toner removal non-processing surface B side ... Image present ( 1) Non-treated surface B side for toner removal ... No image (0) Four patterns are considered. Now and (A
XB = 1 × 1 = 1) is selected (b), the transfer paper 2 is sent into the wetting unit 4, and the image erasing process is not performed in the same manner as described above (c), the separation unit 43.
The paper is ejected onto the first paper ejection tray 37 via (d).
Next, and if (A = 1 & B = 0) is selected (e), the transfer sheet 2 is not subjected to the image erasing process (f), and is branched upward in the separation unit 43 and the second discharge tray. The sheet is discharged to 38 (g). Next, and (A = 0 & B
= 1) is selected (h), the electromagnetic solenoid 2
The direction of the separation claw 33 is controlled by 7 (see FIG. 15, which will be described later), the transfer paper 2 is guided into the paper discharge exclusive path 34 and branched downward by the separation unit 43, and the first paper discharge tray 3
The sheet is discharged onto the sheet 7 (d). Next, and (A + B =
0) is selected (i), the electromagnetic solenoid 27
The direction of the separation claw 33 is controlled by the transfer paper 2, the transfer paper 2 is guided into the paper discharge exclusive path 34, branched by the separation unit 43, and discharged onto the second paper discharge tray 38 (g). As a result, it is possible to obtain the recycled paper 20 on which the image remains only on the non-processing surface B (one surface) on the first paper discharge tray 37. Further, on the second paper discharge tray 38, it is possible to obtain the recycled paper 20 which is a double-sided blank paper with images erased on both the processing surface A and the non-processing surface B.

As described above, the first paper discharge tray 37 and the second paper discharge tray 38 have a certain relationship (that is, the first paper discharge tray 37 is erased on one side only). Second transfer tray 38
Since the transfer paper 2 having a relationship such that the transfer paper 2 on both sides of which has been erased is obtained) is discharged, the unprocessed transfer paper 2 and the transfer paper 2 on which the image erasure processing is performed are Since there is no mixture, the sorting work by the user is eliminated, and the work efficiency can be improved.

Next, an embodiment of the invention described in claim 7 will be described with reference to FIGS. 13 and 14. The embodiments of the invention described in claims 1 to 6 (FIGS. 1, 3, 5, 7,
9 and 11), the description of the same parts is omitted, and the same reference numerals are used for the same parts. In this embodiment, in the image erasing apparatus as shown in FIG. 13, first,
Two image detection sensors 22 for detecting the presence / absence of toner on the processed surface A and the non-processed surface B of the transfer paper 2 are provided at the upstream side of the wetting unit 4 on the paper feed side. Further, on the downstream side of the toner peeling unit 5, a separation claw 45 as a first paper separation unit that changes the discharge direction of the transfer paper 2 in accordance with the presence / absence of toner on the processed surface A and the non-processed surface B.
Is provided. A reversing unit 46 as a reversing unit for reversing the transfer paper 2 separated by the separating claw 45 is arranged between the separating claw 45 and the upstream side of the wetting unit 4. The reversing unit 46 includes a reversing path 47.
And a reversing roller 48 and a switching claw 49.
At the position where a part of the reverse path 47 extending downward and the transport path 9 meet, the discharge direction of the transfer paper 2 is changed according to the presence / absence of toner on the processing surface A and the non-processing surface B. A separation claw 50 is provided as a second paper separation unit.

The operation of this apparatus having such a configuration will be described with reference to the flowchart of FIG. When the user presses the start switch, first, the flag i = 0 for the first processing is set (a), and the transfer paper 2 is fed from the paper feed tray 7. At this time, the upper and lower two image detection sensors 22 detect the surface states of the processing surface A and the non-processing surface B of the transfer paper 2 (b), and it is determined whether or not there is an image on the processing surface A side (c). ). When there is an image (A = 1), the toner removal processing from the wetting unit 4 to the toner peeling unit 5 is performed (d), and when there is no image (A = 0), the separation claw 5 is used.
0 is guided into the upper reversing path 47, and the reversing roller 4
Inversion processing is performed at 8 (e).

Next, it is determined whether the one-side processing (i = 0) or both-side processing (i = 1) is performed according to the value of the flag i (f). When i = 0, it is determined whether or not there is an image on the non-processing surface B of the transfer paper 2 (A = 1) whose one surface (processing surface A) has been subjected to the toner removal processing (d) (g). . When the presence of an image (B = 1) is detected, the direction of the separation claw 45 is controlled by the electromagnetic solenoid 60 (see FIG. 16 described later), the transfer sheet 2 is guided into the reversing path 47, and the flag i = 1 is set ( h). The transfer paper 2 is reversed by a general switchback mechanism (i), and the switching claw 49 and the separation claw 5 are used.
It is controlled in the direction of 0 and sent again into the wetting unit 4,
A series of toner removal processing is performed again (d). At this time,
Since the flag i = 1 in the second operation of the toner removal processing is not i = 0 (f), the toner is guided to the drying unit 6 by the separation claw 45 and dried, and then discharged onto the paper discharge tray 21. It is printed (j).

The processes other than the above will be described below. The transfer paper 2 (A = 1) whose one surface has been subjected to the toner removal processing (d) is guided to the drying unit 6 by the separation claw 45 when the absence of an image (B = 0) is detected (g).
The paper is discharged to the paper discharge tray 21 (j). Further, one surface (processing surface A) is not subjected to the toner removal processing, but is guided to the reversing path 47 by the separating claw 50 and is reversed by the reversing roller 48 (e).
When the presence of an image (B = 1) is detected, the transferred transfer paper 2 (A = 0) is guided to the wetting unit 4 for toner removal processing (d), and is guided to the drying unit 6 by the separating claw 45,
The paper is discharged to the paper discharge tray 21 (j). Further, the transfer paper 2 (A = 0), which has been guided to the reversing path 47 by the separation claw 50 and subjected to the reversing processing (e) by the reversing roller 48 without the toner removal processing on one surface (processing surface A), has no image (B). =
0) is detected, the transfer paper 2 is guided by the switching claw 49 in the direction of the linear reversing path 47 and advances therethrough.
The separation claw 45 guides the sheet into the drying unit 6 and discharges the sheet onto the sheet discharge tray 21. As a result, the blank recycled paper 20 having both sides (processed surface A, non-processed surface B) of which images are erased is discharged onto the discharge tray 21.

As described above, the reversing unit 46 is used to reverse the transfer paper 2 so that the discharge tray 2
Since the transfer sheet 2 whose image has been erased on both sides can be ejected onto the sheet 1, it is not necessary for the user to set the sheets to be erased in one direction, and there is an image on both sides. Even in this case, the image erasing process can be performed by one set operation. As a result, the sorting work by the user is eliminated, and the work efficiency can be improved.

Here, FIG. 15 shows the above-mentioned claim 1.
3 is a block diagram showing a control circuit of an image erasing device in embodiments of the invention described in 3, 4, and 6. When the main switch 51 is turned on, a predetermined DC voltage is applied to each control IC from the DC power supply 52, and the CPU 5 is supplied with power.
3 performs the reset operation of the program counter etc.
Various controls are started based on the program in the OM 54. The CPU 53 is connected to a parallel interface 56 via an address data bus 55, and a driver 57 for controlling each load is connected to an output port of the parallel interface 56. An electromagnetic solenoid (SOL) 27 is connected to the driver 57, and the electromagnetic solenoid (SOL) 27 controls the direction of the above-described separation claws 24, 33, 44a, 44b to convey the transfer paper 2. Can be changed. Further, the serial interface 58 connected to the CPU 53 has an unprocessed number display section 35 (see FIG. 5).
The operation display unit 36 having a reference) is connected. As a result, the data from the operation display unit 36 can be written in the RAM 59 via the serial interface 58.

FIG. 16 is a block diagram showing the control circuit of the image erasing apparatus in the embodiment of the invention described in claims 2, 5, and 7. Also in this case, the same control as that of FIG. 15 described above can be performed, and the electromagnetic solenoid (SOL) 33 is connected to the driver 57, and the electromagnetic solenoid (SOL) 60 causes the various separation claws 28, By controlling the directions of 39a, 39b, 45 and 50, the transfer direction of the transfer paper 2 can be changed.

[0045]

According to the first aspect of the present invention, the toner on the treated surface side of the transfer paper is wetted by the wetting means, and the wetted treatment surface of the transfer paper is heated by the toner peeling means to adhere to the surface. In an image erasing apparatus capable of obtaining the transfer paper as recycled paper by removing the toner, and drying the discharged transfer paper after drying the toner by a drying means, and discharging the transfer paper. An image detection sensor for detecting the presence / absence of toner on the non-processing surface side is provided downstream of the toner peeling means, and the transfer paper is discharged according to the detected presence / absence of toner on the non-processing surface side. A sheet separating unit that changes the direction is disposed on the downstream side of the drying unit, and an unprocessed transfer sheet whose toner is detected on the unprocessed surface is discharged and the unprocessed surface. If no toner is detected, the image is erased Since the second discharge tray for discharging the transferred transfer paper is provided independently on the downstream side of the paper separating means, the processed surface and the non-processed surface of the transfer paper are set in opposite directions. Even when a double-sided copy transfer sheet is set, it is possible to prevent the transfer sheet having an image on one side and the transfer sheet having no image on both sides from being mixed, which allows the user's sorting work to be performed. The labor is eliminated and the work efficiency can be improved.

According to the second aspect of the invention, the toner on the treated surface side of the transfer paper is wetted by the wetting means, and the treated surface of the transfer paper after the wetting is heated by the toner peeling means to remove the toner adhering to the surface. In an image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying the transfer paper after drying by a drying means, the transfer paper is not treated. An image detection sensor for detecting the presence / absence of toner on the surface side is arranged downstream of the toner peeling means, and the paper separating means for changing the discharge direction of the transfer paper according to the presence / absence of toner on the non-processing surface side. Is disposed on the downstream side of the toner peeling means, and a reversing means for reversing the transfer paper detected by the paper separating means as having toner on the non-processing surface side is provided between the paper separating means and the upstream side of the wetting means. Placed between Therefore, even if the processed and unprocessed surfaces of the transfer paper are set upside down or the double-sided copy transfer paper is set, it is possible to eject the transfer paper with both sides of the image erased. This can save the user the trouble of resetting the image and performing the image erasing process again, and the work efficiency can be improved.

According to the third aspect of the invention, the toner on the treated surface side of the transfer paper is moistened by the moistening means, and the moistened treatment surface of the transfer paper is heated by the toner peeling means to remove the toner adhering to the surface. In the image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying it by a drying means, and then discharging the paper, a treated surface of the transfer paper. An image detection sensor for detecting the presence or absence of toner on the side is disposed on the paper feed side upstream of the wetting means, and the paper separating means for changing the discharge direction of the transfer paper according to the presence or absence of toner on the processing surface side. Is disposed in the transport path upstream of the wetting means, and a dedicated discharge path for transporting the transfer paper, which has been detected by the paper separating means as having no toner, is provided downstream of the paper separating means and the drying means. Placed between the Since the unprocessed number counting display means for counting and displaying the number of unprocessed transfer sheets passing through the recording / ejecting dedicated path is provided, the processed surface and the unprocessed surface of the transfer paper are set in the opposite directions. In such a case, an unnecessary image erasing process operation can be eliminated to prevent unnecessary deterioration of the paper. Further, the user can know how many unprocessed transfer papers are included in the transfer papers that have been subjected to the double-sided processing, so that the sorting work can be efficiently performed.

According to the fourth aspect of the invention, the toner on the treated surface side of the transfer paper is wetted by the wetting means, and the treated surface of the transfer paper after the wetting is heated by the toner peeling means to remove the toner adhering to the surface. In the image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying it by a drying means, and then discharging the paper, a treated surface of the transfer paper. An image detection sensor for detecting the presence or absence of toner on the side is disposed on the paper feed side upstream of the wetting means, and the paper separating means for changing the discharge direction of the transfer paper according to the presence or absence of toner on the processing surface side. Is provided in the transport path upstream of the wetting means, and a dedicated sheet discharge path for transporting the transfer paper detected by the paper separating means as having no toner on the processing surface side is provided in the vicinity of the downstream of the paper separating means and the drying means. Between the position of Installed, the transfer paper on which the image erasing process has been performed by detecting the presence of toner on the processing surface is discharged, and the unprocessed transfer paper on which the toner is detected on the processing surface is discharged. A second paper discharge tray for discharging paper through the paper-dedicated path is provided independently, and an unprocessed number counting display means for counting and displaying the number of unprocessed transfer sheets passing through the paper-dedicated path is provided. Since it is provided, the unprocessed transfer paper and the transfer paper that has been subjected to the image erasing process do not coexist, so that the sorting work by the user is eliminated and the work efficiency can be improved. Further, when the processed surface and the non-processed surface of the transfer paper are set in opposite directions, an extra image erasing operation can be eliminated, and unnecessary deterioration of the paper can be prevented.

According to a fifth aspect of the present invention, the toner on the treated surface side of the transfer paper is wetted by the wetting means, and the treated surface of the transfer paper after the wetting is heated by the toner peeling means to remove the toner adhering to the surface. In the image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying it by a drying means, and then discharging the paper, a treated surface of the transfer paper. An image detection sensor for detecting the presence or absence of toner on the side is disposed on the paper feed side upstream of the wetting means, and the paper separating means for changing the discharge direction of the transfer paper according to the presence or absence of toner on the processing surface side. Is disposed in the conveying path upstream of the wetting means, and the reversing means for reversing the transfer paper detected by the paper separating means as having no toner on the processing surface side is arranged in the vicinity of the paper separating means. Non-processing side of paper The image erasing process can be reliably performed even when the face is set in the opposite direction, which saves the user the trouble of resetting the image and performing the image erasing process again. The work efficiency can be improved.

According to the sixth aspect of the present invention, the toner on the treated surface side of the transfer paper is wetted by the wetting means, and the treated surface of the transfer paper after the wetting is heated by the toner peeling means to remove the toner adhering to the surface. In an image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying the transfer paper after drying by a drying means, the transfer paper is not treated. An image detection sensor for separately detecting the presence / absence of toner on the processing surface and the processing surface is provided on the paper feed side upstream of the wetting means, and the transfer paper is transferred depending on the presence / absence of toner on the non-processing surface and the processing surface. A first sheet separating means for changing the sheet discharging direction of the first sheet separating means is disposed in the conveying path upstream of the wetting means, and the first sheet separating path for conveying the transfer sheet separated by the first sheet separating means is the first sheet discharging means. Paper separating means and the dry The second paper separating means, which is arranged between the position near the downstream side of the means and changes the paper discharge direction of the transfer paper according to the detected presence or absence of toner on the non-processed surface and the processed surface. The transfer sheet is disposed so as to communicate with one end of the paper exclusive path and the downstream side of the drying means, and the transfer paper is discharged to the downstream side of the second paper separating means according to the presence / absence of toner. Since the first paper ejection tray and the second paper ejection tray are independently provided, there is a certain relationship between the first paper ejection tray and the second paper ejection tray (for example, the first paper ejection tray has a double-sided relationship). The transfer paper that has undergone the image erasing process is ejected, and the transfer paper that has the relationship such that the transfer paper that has undergone the image erasing process on only one side is ejected to the second paper ejection tray. This prevents the unprocessed transfer paper and the transfer paper that has been subjected to the image erasing process from mixing together. Eliminates sorting operations of the user, thereby improving the working efficiency.

According to a seventh aspect of the present invention, the toner on the treated surface side of the transfer paper is wetted by the wetting means, and the treated surface of the transfer paper after the wetting is heated by the toner peeling means to remove the toner adhering to the surface. In an image erasing device capable of obtaining the transfer paper as recycled paper by peeling the transfer paper after the toner is peeled off and drying the transfer paper after drying by a drying means, the transfer paper is not treated. An image detection sensor for separately detecting the presence / absence of toner on the processing surface and the processing surface is provided on the paper feed side upstream of the wetting means, and the transfer paper is transferred depending on the presence / absence of toner on the non-processing surface and the processing surface. First paper separating means for changing the paper discharge direction of the first paper separating means is disposed downstream of the toner separating means, and a reversing means for inverting the transfer paper separated by the first paper separating means is the first paper separating means. Means and the wet hand Upstream of the wetting means, a second paper separating means is provided between the wetting means and the upstream side of the wetting means for changing the discharge direction of the transfer paper according to the presence or absence of toner on the non-processed surface and the processed surface. Since it is arranged at a position where the reversing means and the reversing means meet, it is possible to discharge the transfer paper, which has been subjected to the image erasing processing on both sides, onto the paper discharge tray, and the user sets the processing surfaces in one direction. There is no need to do it. Further, even in the case of double-sided copying, double-sided image erasing processing can be performed by one set operation, which eliminates the user's sorting work and improves work efficiency.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional front view showing the configuration of an image erasing device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment of the invention described in claim 1.

FIG. 3 is a vertical cross-sectional front view showing the configuration of an image erasing device according to an embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the embodiment of the invention described in claim 2;

FIG. 5 is a vertical sectional front view showing the configuration of the image erasing device according to the third embodiment of the invention.

FIG. 6 is a flowchart showing the operation of the embodiment of the invention described in claim 3;

FIG. 7 is a vertical cross-sectional front view showing the configuration of an image erasing device according to an embodiment of the present invention.

FIG. 8 is a flowchart showing the operation of the embodiment of the invention described in claim 4;

FIG. 9 is a vertical sectional front view showing a configuration of an image erasing device according to an embodiment of the invention as set forth in claim 5;

FIG. 10 is a flowchart showing the operation of the embodiment of the invention described in claim 5;

FIG. 11 is a vertical sectional front view showing a configuration of an image erasing device according to an embodiment of the present invention.

FIG. 12 is a flow chart showing the operation of the embodiment of the invention described in claim 6;

FIG. 13 is a vertical sectional front view showing the configuration of an image erasing apparatus according to an embodiment of the present invention.

FIG. 14 is a flow chart showing the operation of the embodiment of the invention described in claim 7;

FIG. 15 is a block diagram showing a control circuit of an image erasing device which is an embodiment of the invention described in claims 1, 3, 4, and 6.

FIG. 16 is a block diagram showing a control circuit of an image erasing device which is an embodiment of the invention described in claims 2, 5, and 7.

FIG. 17 is a vertical sectional front view showing the configuration of a conventional image erasing device.

[Explanation of symbols]

2 Transfer Paper 4 Wetting Means 5 Toner Peeling Means 6 Drying Means 9 Conveying Path 20 Recycled Paper 22 Image Detection Sensor 23 Paper Separation Means 25 First Paper Ejection Tray 26 Second Paper Ejection Tray 28 Paper Separation Means 29 Reversing Means 33 Paper Separation means, first paper separation means 34 Paper discharge dedicated path 35 Unprocessed number counting display means 37 First paper discharge tray 38 Second paper discharge trays 39a, 39b Paper separation means 40 Inversion means 43 Second paper separation Means 45 First paper separating means 46 Reversing means 50 Second paper separating means A Processing surface B Non-processing surface

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G03G 15/00 530

Claims (7)

[Claims] 1. The toner on the surface to be processed of the transfer paper is moistened by a moistening means, and the moistened surface of the transfer paper is heated by a toner peeling means to peel off the toner adhering to the surface, and the toner is peeled off. In the image erasing device capable of obtaining the transfer paper as recycled paper by drying the transfer paper which is still wet by a drying means and discharging the same, the presence or absence of toner on the non-processed side of the transfer paper. An image detection sensor for detecting the above is provided on the downstream side of the toner peeling means, and the paper separating means for changing the discharge direction of the transfer paper according to the detected presence or absence of toner on the non-processing surface side is provided. Disposed on the downstream side of the drying means, the first processing tray for discharging unprocessed transfer paper whose toner is detected on the non-processed surface is discharged, and the image is erased when no toner is detected on the non-processed surface. The processed transfer paper is ejected. An image erasing device characterized in that a second paper discharge tray provided separately is provided downstream of the paper separating means. 2. The toner on the treated surface of the transfer paper is moistened by a moistening means, and the moistened treated surface of the transfer paper is heated by a toner peeling means to peel off the toner adhering to the surface, and the toner is peeled off. In the image erasing device capable of obtaining the transfer paper as recycled paper by drying the transfer paper which is still wet by a drying means and discharging the same, the presence or absence of toner on the non-processed side of the transfer paper. An image detection sensor for detecting the above is disposed on the downstream side of the toner peeling means, and a paper separating means for changing the discharge direction of the transfer paper according to the presence / absence of the toner on the non-processing surface side of the toner peeling means. A reversing unit, which is arranged on the downstream side and reverses the transfer paper on the non-processing surface side detected by the paper separating unit, is arranged between the paper separating unit and the upstream side of the wetting unit. An image featuring Erase device. 3. The toner on the treated surface of the transfer paper is moistened by a moistening means, and the moistened treated surface of the transfer paper is heated by a toner peeling means to peel off the toner adhering to the surface, and the toner is peeled off. In an image erasing apparatus capable of obtaining the transfer paper as recycled paper by drying the transfer paper that has been wet afterwards by a drying means and discharging the paper, the presence or absence of toner on the processing surface side of the transfer paper is checked. An image detection sensor for detecting is disposed on the paper feed side upstream of the wetting means, and a paper separating means for changing the discharge direction of the transfer paper according to the presence or absence of toner on the processing surface is provided upstream of the wetting means. And a discharge-dedicated path for conveying the transfer paper, which has been detected as having no toner on the processing surface side by the paper separating means, is arranged between the paper separating means and the downstream side of the drying means. Then pass through the above-mentioned dedicated discharge path An image erasing apparatus comprising an unprocessed number counting display means for counting and displaying the number of unprocessed transfer sheets. 4. The toner on the processed surface side of the transfer paper is moistened by a moistening means, and the moistened processed surface of the transfer paper is heated by a toner peeling means to peel off the toner adhering to the surface, and the toner is peeled off. In an image erasing apparatus capable of obtaining the transfer paper as recycled paper by drying the transfer paper that has been wet afterwards by a drying means and discharging the paper, the presence or absence of toner on the processing surface side of the transfer paper is checked. An image detection sensor for detecting is disposed on the paper feed side upstream of the wetting means, and a paper separating means for changing the discharge direction of the transfer paper according to the presence or absence of toner on the processing surface is provided upstream of the wetting means. Between the paper separating means and a position near the downstream of the drying means, a paper discharge exclusive path which is disposed in the paper conveying path and which conveys the transfer paper, which is detected as having no toner on the processing surface side by the paper separating means. Placed on the processing surface. The transfer paper that has been subjected to image erasing processing when it is detected that there is a corner is ejected, and the unprocessed transfer paper that is detected as having no toner on the processing surface is ejected through the dedicated ejection path. And a second paper discharge tray which is independent of the second paper discharge tray, and an unprocessed number counting display means for counting and displaying the number of unprocessed transfer sheets passing through the dedicated discharge path. Image eraser. 5. The toner on the treated surface of the transfer paper is moistened by a moistening means, and the moistened treated surface of the transfer paper is heated by a toner peeling means to peel off the toner adhering to the surface, and the toner is peeled off. In an image erasing apparatus capable of obtaining the transfer paper as recycled paper by drying the transfer paper that has been wet afterwards by a drying means and discharging the paper, the presence or absence of toner on the processing surface side of the transfer paper is checked. An image detection sensor for detecting is disposed on the paper feed side upstream of the wetting means, and a paper separating means for changing the discharge direction of the transfer paper according to the presence or absence of toner on the processing surface is provided upstream of the wetting means. The image erasing apparatus is characterized in that a reversing unit arranged in the transporting path of the sheet reversing unit for reversing the transfer sheet detected by the sheet separating unit as having no toner is disposed in the vicinity of the sheet separating unit. 6. The toner on the treated surface of the transfer paper is moistened by a moistening means, and the moistened treated surface of the transfer paper is heated by a toner peeling means to peel off the toner adhering to the surface, and the toner is peeled off. In an image erasing apparatus capable of obtaining the transfer paper as recycled paper by drying the transfer paper that has been wet afterwards by a drying means and discharging the toner, a toner on a non-processed surface and a processed surface of the transfer paper. An image detection sensor that detects the presence or absence of each of the transfer sheets is disposed on the paper feed side upstream of the wetting means, and the discharge direction of the transfer sheet is changed according to the presence or absence of toner on the non-processed surface and the processed surface. The first paper separating means is disposed in the transport path upstream of the wetting means,
A non-processing detected by disposing a paper discharge exclusive path for conveying the transfer paper separated by the first paper separating means between the first paper separating means and a position in the vicinity of the downstream of the drying means. A second paper separating means for changing the paper discharge direction of the transfer paper according to the presence / absence of toner on the processing surface and the processing surface, is connected between one end of the paper discharge path and the downstream side of the drying means. A first paper discharge tray and a second paper discharge tray for discharging the transfer paper according to the presence / absence of toner are provided independently on the downstream side of the second paper separating means. An image erasing device characterized by the above. 7. The toner on the processed surface side of the transfer paper is moistened by a moistening means, and the moistened processed surface of the transfer paper is heated by a toner peeling means to peel off the toner adhering to the surface, and the toner is peeled off. In an image erasing apparatus capable of obtaining the transfer paper as recycled paper by drying the transfer paper that has been wet afterwards by a drying means and discharging the toner, a toner on a non-processed surface and a processed surface of the transfer paper. An image detection sensor that detects the presence or absence of each of the transfer sheets is disposed on the paper feed side upstream of the wetting means, and the discharge direction of the transfer sheet is changed according to the presence or absence of toner on the non-processed surface and the processed surface. A first paper separating means is disposed downstream of the toner separating means, and a reversing means for reversing the transfer paper separated by the first paper separating means is provided between the first paper separating means and the wetting means. Arranged between the upstream side The second paper separating means for changing the discharge direction of the transfer paper according to the presence / absence of toner on the non-processing surface and the processing surface is located at a position where the conveying path upstream of the wetting means and the reversing means meet. An image erasing device, characterized in that