Sheet Processing Device

Abstract

To reduce erroneous detection of a storage amount by a sensor.SOLUTION: A sheet processing device includes: a perforation unit that performs perforation processing for perforating a sheet; a first separation unit that separates a first generated substance generated in the perforation processing, and a second generated substance generated separately from the first generated substance; and a first recovery unit that recovers the first generated substance.SELECTED DRAWING: Figure 15

Description

[Technical field]

[0001] The present invention relates to a sheet processing apparatus. [Background technology]

[0002] 2. Description of the Related Art There is known a technique for performing post-processing such as punching on a sheet on which an image has been formed.

[0003] A technique for collecting punch waste generated during punching is known. Specifically, the sheet processing apparatus includes a storage box for collecting punch waste that is generated during punching and falls. The punch waste accumulates in the storage box. The sheet processing apparatus then transports the accumulated punch waste by blowing air. In this way, a technique for increasing the capacity to collect punch waste while saving space and improving workability is known (for example, see Patent Document 1). Summary of the Invention [Problem to be solved by the invention]

[0004] For example, in processes such as punching paper, paper dust and the like (hereinafter referred to as "second generated materials") are generated in addition to punching waste and the like (hereinafter referred to as "first generated materials"). In addition, generated materials may adhere to a sensor that detects when a container for collecting generated materials reaches a certain amount or more. The technology disclosed in Patent Document 1 has an issue in that the sensor may erroneously detect the storage amount due to the adhesion of generated materials and the like.

[0005] The present invention aims to reduce false detection of storage volume by a sensor. [Means for solving the problem]

[0006] In order to solve the above problems, a sheet processing apparatus according to one aspect of the present invention includes: a punching unit that performs a punching process to punch holes in a sheet; A first separation unit that separates a first generated product generated in the perforation treatment from a second generated product generated separately from the first generated product; a first collection section for collecting the first generated product; The present invention is characterized by comprising: Effect of the Invention

[0007] According to the present invention, erroneous detection of storage volume by the sensor can be reduced. [Brief description of the drawings]

[0008] [Figure 1] 1A and 1B are diagrams illustrating an example of use of the sheet processing apparatus 100. [Diagram 2] FIG. 2 illustrates a first example of a processing device 200. [Diagram 3] FIG. 2 illustrates a second example of the processing device 200. [Figure 4] FIG. 13 illustrates a third example of the processing device 200. [Diagram 5] 13 is a diagram showing an example of separation by a first centrifugal separator 220. FIG. [Figure 6] 13 is a diagram showing an example of separation by a second centrifugal separator 230. FIG. [Figure 7] 13 is a diagram showing an example of accumulation in a first centrifugal separator 220 and a second centrifugal separator 230. FIG. [Figure 8] 11A and 11B are diagrams illustrating an example of control for opening the bottom by the opening / closing unit. [Figure 9] FIG. 13 is a diagram showing an example of recovery. [Figure 10] FIG. 13 is a diagram showing a detection example. [Figure 11] 13A and 13B are diagrams showing modified examples of the opening and closing portion. [Figure 12] FIG. 13 is a diagram showing a modified example of the recovery section. [Figure 13] 13 is a diagram showing a modified example of the second transport path 214. FIG. [Figure 14] FIG. 13 is a diagram illustrating an example of the overall process. [Figure 15] FIG. 2 is a diagram illustrating an example of a functional configuration. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, specific examples will be described with reference to the accompanying drawings. Note that the embodiment is not limited to the specific examples described below.

[0010] [Example of sheet processing device 100] 1 is a diagram showing an example of use of a sheet processing apparatus 100. For example, the sheet processing apparatus 100 is connected to an image forming apparatus 1 for use. Specifically, the sheet processing apparatus 100 receives a sheet discharged by the image forming apparatus 1. That is, the sheet is transported from the right side to the left side in the example shown in the figure.

[0011] For example, a sheet on which an image has been formed is transported to a sheet processing apparatus 100 via a path 101 .

[0012] The processing device 200 is a device that performs processing such as punching on the sheet conveyed from the path 101. The processing device 200 will be described in detail later.

[0013] The path 101 includes entrance rollers 102 and conveyance rollers such as conveyance rollers 103. For example, the sheet processing apparatus 100 includes a processing apparatus 200 between the entrance rollers 102 and the conveyance rollers 103.

[0014] The sheet processing apparatus 100 may have a plurality of paths. For example, the sheet processing apparatus 100 has two paths, a first path 110 for discharging a sheet to a proof tray 111, and a second path 120 for discharging a sheet to a shift tray 121. The sheet processing apparatus 100 includes a branching claw 104 at a branching point of the first path 110 and the second path 120.

[0015] The branch claw 104 rotates to sort the sheet into either a first path 110 or a second path 120. When the sheet is sorted into the first path 110, it is transported by a drive device such as a roller.

[0016] After being sorted to the second path 120, the sheets are subjected to post-processing such as stapling. After the processing by the processing device 200 is completed, the sheets are conveyed to a staple tray 125 by rollers 122 or the like.

[0017] A staple device 126 is installed at an end of the staple tray 125. The staple device 126 staples the sheets that have fallen onto the staple tray 125. After the stapling process, the sheets are discharged onto the shift tray 121 by the paper discharge rollers 123. The height of the sheets discharged onto the shift tray 121 is detected by a filler 124.

[0018] The sheet processing apparatus 100 is not limited to the above-mentioned apparatus. The sheet processing apparatus 100 may be used without being connected to the image forming apparatus 1.

[0019] [Example of processing device 200] 2 is a diagram showing a first example of a processing device 200. For example, the processing device 200 includes a pin 211, a die 212, a punching unit 210, a first conveying path 213, a second conveying path 214, a third conveying path 221, a first centrifugal separator 220, and the like.

[0020] Moreover, it is preferable that the processing apparatus 200 further includes a first opening / closing lid 222, a first opening / closing device 223, a first collector 224, an aspirator 240, and the like.

[0021] The sheet is conveyed into the processing device 200 by the inlet rollers 102. Next, the processing device 200 performs a punching process on the sheet conveyed by the inlet rollers 102, using pins 211 and a die 212 to punch the pins 211 from top to bottom.

[0022] The first conveying path 213 is disposed below the punching unit 210. The first centrifugal separator 220 is disposed downstream of the first conveying path 213. The first collector 224 is disposed below the first centrifugal separator 220.

[0023] The second conveying path 214 is installed, for example, downstream of the punching unit 210 and upstream of the first centrifugal separator 220.

[0024] A sensor 225 is installed in the first collector 224. Specifically, the sensor 225 is installed on the top of the first collector 224, etc. The sensor 225 detects when the first collector 224 has a certain amount of storage or more. For example, the sensor 225 detects when the first collector 224 is full. However, the storage amount detected by the sensor 225 is set in advance. The installation position of the sensor 225, etc. is determined according to the storage amount to be detected, etc.

[0025] The bottom of the first centrifugal separator 220 is opened and closed by a first opening / closing cover 222. The opening and closing of the first opening / closing cover 222 is controlled by a first opening / closing device 223.

[0026] The aspirator 240 is installed, for example, on the upper part of the first centrifugal separator 220. The aspirator 240 aspirates the powder separated by the first centrifugal separator 220. When the aspirator 240 aspirates the powder, the powder is discharged to the outside through the third conveying path 221.

[0027] The processing device 200 may have the following configuration.

[0028] 3 is a diagram showing a second example of the processing device 200. Compared to the first example, the second example differs in that the first centrifugal separator 220 and the first collector 224 are connected without any gaps. Below, the differences will be mainly described, and the same components as those in the first example will be denoted by the same reference numerals and redundant description will be omitted.

[0029] It is preferable that the first collector 224 is removable.

[0030] In this manner, the processing device 200 may have a configuration in which the first centrifugal separator 220 and the first collector 224 are connected to each other.

[0031] 4 is a diagram showing a third example of the processing device 200. Compared with the first example, the third example differs in that a second centrifugal separator 230 and a fourth transport path 231 are added. In addition, the processing device 200 desirably further includes a second opening / closing lid 232, a second opening / closing device 233, and a second collector 234, etc.

[0032] The second centrifugal separator 230 is disposed downstream of the third transport path 221. In addition, the second collector 234 is disposed below the second centrifugal separator 230.

[0033] A fourth transport path 231 is installed above the second centrifugal separator 230. Then, an aspirator 240 is installed downstream of the fourth transport path 231.

[0034] The bottom of the second centrifugal separator 230 is opened and closed by a second opening / closing lid 232. The opening and closing of the second opening / closing lid 232 is controlled by a second opening / closing device 233.

[0035] [Example of separation by first centrifugal separator 220] 5 is a diagram showing an example of separation by the first centrifugal separator 220. In the diagram, arrows indicate the flow of air.

[0036] When the punching process is performed in the punching unit 210, punching debris S, powder P, and the like are generated. Then, the punching debris S and powder P are transported to the first centrifugal separator 220 by suction by the suction device 240, gravity, and the like.

[0037] The punching scraps S and the powder P are separated by the first centrifugal separator 220. For example, the powder P is paper powder or toner powder. Specifically, the paper powder has a particle size of about φ10 to φ100 micrometers. The toner powder has a particle size of about φ5 to φ8 micrometers. For example, the first centrifugal separator 220 separates the above-mentioned paper powder or toner powder as powder P, while separating generated materials other than the powder P as punching scraps S, depending on the settings or the like.

[0038] The punch scraps S are, for example, punch scraps having a diameter of about φ6.5 mm or φ8 mm.

[0039] The first generated product and the second generated product may differ depending on the type of the sensor 225, etc. That is, the first centrifugal separator 220 is arbitrarily set as to what the first generated product and the second generated product are, depending on the settings, etc.

[0040] Since the drilling debris S is often heavier than the powder P, it tends to accumulate at the bottom of the first opening / closing cover 222, that is, the first centrifugal separator 220.

[0041] On the other hand, since the powder P is often lighter than the punch scraps S, it is transported to the second centrifugal separator 230 through the third transport path 221.

[0042] [Example of separation by second centrifugal separator 230] Figure 6 is a diagram showing an example of separation by the second centrifugal separator 230. As in Figure 5, the diagram shows the air flow with arrows.

[0043] For example, after separation by the first centrifugal separator 220, the powder P is transported to the second centrifugal separator 230.

[0044] The second centrifugal separator 230 separates the powder P into a relatively heavy first object and a second object. The second object is then discharged to the outside by suction using the suction device 240.

[0045] [Example of accumulation in the first centrifugal separator 220 and the second centrifugal separator 230] 7 is a diagram showing an example of accumulation in the first centrifugal separator 220 and the second centrifugal separator 230. For example, when the first centrifugal separator 220 and the second centrifugal separator 230 are controlled to close the first opening / closing lid 222 and the second opening / closing lid 232, the drilling waste S and powder P can be accumulated at the bottom.

[0046] When a certain amount of storage has accumulated, the first opening and closing device 223 and the second opening and closing device 233 control the first opening and closing lid 222 and the second opening and closing lid 232 to open as follows.

[0047] Fig. 8 is a diagram showing an example of control for opening the bottom by the opening / closing unit. Fig. 8(A) shows a state in which the first opening / closing lid 222 or the second opening / closing lid 232 is closed, similar to Fig. 7. In this state, drilling waste S and powder P accumulate at the bottom of the first centrifugal separator 220 and the second centrifugal separator 230.

[0048] 8(B) shows a state in which the first opening / closing lid 222 or the second opening / closing lid 232 is open. For example, the first opening / closing device 223 and the second opening / closing device 233 control the first opening / closing lid 222 or the second opening / closing lid 232 by an actuator such as a solenoid to move the first opening / closing lid 222 or the second opening / closing lid 232 to open the bottom of the first centrifugal separator 220 or the second centrifugal separator 230. Note that opening and closing may be performed by the weight of the drilling scraps S or powder P without using an actuator.

[0049] When controlled in this manner, the drilling debris S or powder P falls by gravity, and the drilling debris S or powder P can be collected by the first collector 224 or the second collector 234 as follows.

[0050] 9 is a diagram showing an example of collection. For example, when the first opening / closing lid 222 and the second opening / closing lid 232 are controlled to open simultaneously, the drilling scraps S and powder P can be collected in the first collector 224 or the second collector 234. Note that collection does not have to be at the same time.

[0051] In this way, by opening and closing the first opening and closing lid 222 or the second opening and closing lid 232, the generated materials are collected or accumulated.

[0052] [Detection example by sensor 225] Fig. 10 is a diagram showing a detection example. For example, in the state shown in Fig. 10(A), that is, when the storage amount is less than a certain amount, the sensor 225 does not detect "full". Hereinafter, the storage amount that the sensor 225 detects as having reached a certain amount is indicated by "threshold 300". Note that threshold 300 is set in advance. In this way, when the storage amount is less than threshold 300, the sensor 225 does not detect "full".

[0053] 10(B), when the storage amount exceeds the threshold value 300, the sensor 225 detects it as "full." When the user is notified of the detection result by the sensor 225, the user can know that the first collection device 224, etc. is in a "full" state.

[0054] [Modifications of opening and closing parts] 11 is a diagram showing a modified example of the opening and closing part. For example, the bottom of the first centrifugal separator 220, the first opening and closing lid 222, and the first collector 224 may have the structure shown in the figure. Specifically, in the structure shown in the figure, the first collector 224 is movable in the Y-axis direction (up and down in the figure).

[0055] When the first collector 224 is raised from the position shown in FIG. 11(A) to the position shown in FIG. 11(B), the first opening / closing lid 222 is brought into an open state.

[0056] By opening and closing such a structure, generated materials may be collected or accumulated.

[0057] [Modification of the recovery section] 12 is a diagram showing a modified example of the collection section, which differs in configuration from that shown in FIG.

[0058] The first collector 224 and the second collector 234 may be configured as the same collector. However, the collector may have a partition plate 226 or the like. That is, the partition plate 226 separates the space that will become the first collector 224 from the space that will become the second collector 234. In this way, the drilling scraps S and the powder P may be collected separately in the same collector.

[0059] [Modification of the second transport path 214] 13 is a diagram showing a modified example of the second transport path 214. For example, the second transport path 214 may have a configuration as shown in the figure.

[0060] 1 and 2, the example shown in FIG. 13 is different in that a second transport path 214 is connected.

[0061] For example, one end of the second transport path 214 is connected to a curved portion of the first path 110. Furthermore, for example, one end of the second transport path 214 is connected to the periphery of the branching claw 104. In addition, for example, one end of the second transport path 214 is connected to the periphery of the stapling device 126. Note that the second transport path 214 may have one end further connected to a position other than these.

[0062] On the other hand, the second transport path 214 transports the other end to a position downstream of the punching unit 210 and upstream of the first centrifugal separator 220.

[0063] In this way, it is preferable that the second conveying path 214 is a conveying path that can convey the generated materials during conveying or generated by processes other than the perforation unit 210 to a position downstream of the perforation unit 210 and upstream of the first centrifugal separator 220. With such a second conveying path 214, the generated materials generated by processes other than the perforation process can also be collected.

[0064] Moreover, it is preferable that the second conveying path 214 conveys the generated material to a position downstream of the punching unit 210 and upstream of the first centrifugal separator 220. By conveying the generated material to such a position, the generated material can be separated by the first centrifugal separator 220.

[0065] [Overall processing example] FIG. 14 is a diagram illustrating an example of the overall process.

[0066] In step S1401, the sheet processing apparatus 100 starts conveying a sheet.

[0067] In step S1402, the sheet processing apparatus 100 starts suction. Note that suction may be started regardless of whether punching processing is being performed or not. In this way, any material generated during a process other than punching processing can also be collected by suction.

[0068] In step S1403, the sheet processing apparatus 100 starts punching processing, separation processing, and collection.

[0069] In step S1404, the sheet processing apparatus 100 judges whether to stop the sheet processing apparatus 100. For example, the sheet processing apparatus 100 judges whether to stop the sheet processing apparatus 100 based on the presence or absence of a stop signal.

[0070] Next, if it is determined that the sheet processing apparatus 100 should be stopped (YES in step S1404), the sheet processing apparatus 100 proceeds to step S1405. On the other hand, if it is determined that the sheet processing apparatus 100 should not be stopped (NO in step S1404), the sheet processing apparatus 100 repeats step S1404, that is, continues the processes such as punching, separation, and collection.

[0071] In step S1405, the sheet processing apparatus 100 stops suction.

[0072] In step S1406, the sheet processing apparatus 100 opens the opening / closing cover.

[0073] In step S1407, the sheet processing apparatus 100 closes the opening / closing cover.

[0074] For example, like steps S1405 to S1407, while suction is stopped, the sheet processing apparatus 100 opens and closes the opening / closing cover to collect generated materials.

[0075] In step S1408, the sheet processing apparatus 100 judges whether the tray is “full.” For example, “full” is judged based on the detection result of the sensor 225.

[0076] Next, if it is determined that the tray is "full" (YES in step S1408), the sheet processing apparatus 100 proceeds to step S1409. On the other hand, if it is determined that the tray is not "full" (NO in step S1408), the sheet processing apparatus 100 ends the entire process.

[0077] In step S1409, the sheet processing apparatus 100 displays the "full" status to the user.

[0078] In step S1410, the sheet processing apparatus 100 judges whether the "full" state has been resolved. For example, the "full" state is judged based on the detection result of the sensor 225.

[0079] Next, if it is determined that the "full" state has been resolved (YES in step S1410), the sheet processing apparatus 100 ends the entire process. On the other hand, if it is determined that the "full" state has not been resolved (NO in step S1410), the sheet processing apparatus 100 proceeds to step S1408.

[0080] Note that the processes may be started or stopped at timings other than those shown in the figures. That is, the overall processes may not be performed in the order shown in the figures. Furthermore, each process in the overall processes may be performed in parallel, distributed, or redundantly.

[0081] [Example of functional configuration] 15 is a diagram showing an example of a functional configuration. For example, the sheet processing apparatus 100 includes a punching section 100F1, a first separation section 100F2, and a first recovery section 100F3. As shown in the figure, the sheet processing apparatus 100 desirably further includes a detection section 100F4, a second separation section 100F5, a second recovery section 100F6, and a suction section 100F7. The example of the functional configuration shown in the figure will be described below.

[0082] The punching section 100F1 performs a punching process to punch holes in a sheet. For example, the punching section 100F1 is realized by a punching unit 210 or the like.

[0083] The first separation section 100F2 separates the first generated product from the second generated product. For example, the first separation section 100F2 is realized by a first centrifugal separator 220 or the like.

[0084] Moreover, it is preferable that the first separating section 100F2 further includes a first stacking section 100F21 and a first opening / closing section 100F22.

[0085] The first accumulation section 100F21 accumulates the first generated product in the first separation section 100F2.

[0086] The first opening / closing unit 100F22, when opened or closed, causes the first generated product to be collected in the first collection unit 100F3, or switches collection by the first collection unit 100F21.

[0087] The first collection section 100F3 collects the first generated product. For example, the first collection section 100F3 is realized by a first collection device 224 or the like.

[0088] The detection unit 100F4 detects that a certain amount or more of the first generated matter has been collected. For example, the detection unit 100F4 is realized by a sensor 225 or the like.

[0089] The second separation unit 100F5 separates the second product into a first object and a second object. For example, the second separation unit 100F5 is realized by a second centrifugal separator 230 or the like.

[0090] The second separating section 100F5 preferably further includes a second stacking section 100F51 and a second opening / closing section 100F52.

[0091] The second stacking section 100F51 stacks the first objects in the second separating section 100F5.

[0092] The second opening / closing unit 100F52, when opened or closed, causes the first object to be collected by the second collection unit 100F6, or switches the accumulation by the second accumulation unit 100F51.

[0093] The second collector 100F6 collects the second product. For example, the second collector 100F6 is realized by a second collector 234 or the like.

[0094] The suction unit 100F7 is disposed downstream of the first recovery unit 100F3. The suction unit 100F7 sucks the first generated product and the second generated product. For example, the suction unit 100F7 is realized by an aspirator 240 or the like.

[0095] As described above, by providing a separation unit such as the first separation unit 100F2, the sheet processing apparatus 100 can separate and collect scraps, powder, and the like, such as the first generated material and the second generated material. In this way, when generated materials can be separated and collected, there is less powder in the first collection unit 100F3 that collects the first generated material. Therefore, powder is less likely to adhere to the sensor, etc. This reduces the possibility that the sensor will detect powder. In this way, it is possible to reduce erroneous detection of the storage amount by the sensor.

[0096] The sheet processing apparatus 100 preferably further includes a transport path, such as a second transport path 214, for transporting the second generated material to a position downstream of the punching section 100F1 and upstream of the first separating section 100F2.

[0097] [Variations of separation] The separation may be performed by any method that can separate and collect waste products having different sizes or weights. For example, the separation may be performed by using a sieve or the like.

[0098] However, it is preferable to use centrifugation for separation. In other words, when separation is performed using centrifugal force, the centrifugal force acts on objects that are even slightly heavy. On the other hand, centrifugal force does not act easily on air, which has no relative mass in the air. Therefore, separation using centrifugal force can separate the air and generated materials with high accuracy.

[0099] [Other embodiments] In the current control method described above, for example, some of the processing may be realized by a program such as firmware. That is, the current control method is a method executed by a computer by causing an arithmetic unit, a storage unit, an input unit, an output unit, and a control unit to cooperate with each other and operate based on the program. In addition, the program may be written to a storage unit or a storage medium, etc. and distributed, or distributed through a telecommunication line, etc.

[0100] Each of the devices described above does not have to be a single device, that is, each device may be a system made up of multiple devices.

[0101] The image forming apparatus may be, for example, a commercial printing machine (such as a large electrophotographic printer or an inkjet printer).

[0102] The sheet is, for example, paper (also called "plain paper"). However, the sheet may be coated paper other than paper, label paper, overhead projector sheet, film, or flexible thin plate. The recording medium may also be roll paper.

[0103] Specifically, the sheet is a recording medium such as paper, film, or cloth.

[0104] Thus, the material of the sheet may be paper, thread, fiber, cloth, leather, metal, plastic, glass, wood, ceramics, or a combination of these.

[0105] The present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the technical gist of the present invention. All technical matters included in the technical ideas described in the claims are covered by the present invention.

[0106] The above-described embodiment shows a preferred example, but a person skilled in the art can realize various modifications from the disclosed contents. Such modifications are also included in the technical scope described in the claims. [Explanation of symbols]

[0107] 1: Image forming device 100: Sheet processing device 100F1: Perforation part 100F2: 1st separation section 100F21: First stacking section 100F22: First opening and closing section 100F3: First collection section 100F4: Detection unit 100F5: 2nd separation section 100F51: Second stacking section 100F52: Second opening and closing section 100F6: Second collection section 100F7: Suction part 101: Route 110: Route 1 120: Route 2 126: Stapling device 200: Sheet processing device 210: Drilling unit 213: First conveying path 214: Second conveyor 220: First centrifuge 221: Third transport route 222: First opening and closing cover 223: First switchgear 224: First collector 225: Sensor 230: Second centrifuge 231: 4th transport route 232: Second opening and closing cover 233: Second switchgear 234: Second collector 240 :Suction device 300: Threshold P: powder S: Drilling waste [Prior art documents] [Patent documents]

[0108] [Patent Document 1] JP 2008-168993 A

Claims

1. A punching unit that performs a punching process to make holes in the sheet; a first separation unit that separates a first generated product generated in the perforation treatment from a second generated product generated in the perforation treatment or a treatment other than the perforation treatment and smaller in size or lighter in weight than the first generated product; A first collection section that collects the first generated product; a detection unit that detects whether a certain amount or more of the first generated material is collected, the detection unit being disposed in the first collection unit; Equipped with The first separation unit is A first collecting section is provided to collect the first generated product, The first stacking unit is A first opening / closing portion is provided, By opening and closing the first opening / closing unit, the first generated material is collected in the first collection unit, or accumulation by the first accumulation unit is switched, When the first product is separated in the first separation section, it is accumulated in the first accumulation section provided in the first separation section, and then is collected in the first collection section. Sheet handling device.

2. The apparatus further includes a suction section upstream of the first collection section, the suction section being configured to suck the first generated product and the second generated product. The sheet processing apparatus according to claim 1 .

3. The apparatus further includes a second separation unit that separates the second generated product into a first object and a second object. The sheet processing apparatus according to claim 1 .

4. The second separation unit is A second stacking unit for stacking the first object is provided. The sheet processing apparatus according to claim 3 .

5. The second stacking section is A second opening / closing portion is provided, The first object is collected by a second collection unit or accumulation by the second accumulation unit is switched by opening and closing the second opening and closing unit. The sheet processing apparatus according to claim 4 .

6. a transport path for transporting the second generated products generated by a process other than the perforation process to a position downstream of the perforation section and upstream of the first separation section. The sheet processing apparatus according to claim 1 .

7. The first separation unit is The first product and the second product are separated by centrifugation. The sheet processing apparatus according to claim 1 .

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