# US 2017/0255154 A1 · Image forming system

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- Number: US 2017/0255154 A1
- Document ID: US20170255154A1
- Status: Published application
- Kind: A1
- Application number: 15/601,035
- Filed: 2017-05-22
- Published: 2017-09-07
- Earliest claimed: 2012-06-29
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Hideto Abe; Yusuke Obuchi
- Web page: https://patentgrep.com/patent/US20170255154A1

## CPC

- G03G 15/6538: {Devices for collating sheet copy material, e.g. sorters, control, copies in staples form}
- G03G 15/6541: {Binding sets of sheets, e.g. by stapling, glueing}
- G03G 2215/0487: Adapted to post-processing step, e.g. binding
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A toner image is formed on a sheet based on image data by an image forming portion, and a plurality of sheets on which the toner image is formed is bound together by a stapleless binding unit including a pair of tooth-like members, each having a concave and convex portion. Then, the image data is corrected by a correction portion so that a ratio of toner within a part of the sheet to be subjected to binding processing by the stapleless binding unit is equal to or smaller than a predetermined value.

## Claims

### Claim at position 1

-4. (canceled)

### Claim 5

A sheet processing apparatus, comprising:
a supporting portion configured to support sheets on which an image is respectively formed;
a pair of tooth members configured to bite the sheets which are supported by the supporting portion to bind the sheets;
a cam configured to rotate to move at least one of the pair of tooth members with respect to another one of the pair of tooth members so that the sheets are bitten by the pair of tooth members;
a motor configured to rotate the cam;
a detection portion configured to detect a position of the cam; and
a control portion configured to control the motor based on a detection result obtained by the detection portion.

### Claim 6 (depends on 5)

A sheet processing apparatus, according to claim 5, further comprising:
a conveying portion configured to convey the sheets, on which the image is respectively formed, to a position between the pair of tooth members,
wherein the control portion controls the motor based on the detection result obtained by the detection portion before the sheets conveyed by the conveying portion reach the position between the pair of tooth members.

### Claim 7 (depends on 5)

A sheet processing apparatus, according to claim 5, further comprising:
a conveying portion configured to convey the sheets, on which the image is respectively formed, to a position between the pair of tooth members,
wherein the control portion controls the motor based on the detection result obtained by the detection portion before the sheets conveyed by the conveying portion reach the position between the pair of tooth members, so that the one of the pair of tooth members is moved away from the other one of the pair of tooth members.

### Claim 8 (depends on 5)

A sheet processing apparatus, according to claim 5, wherein the control portion controls the motor to rotate so that the sheets are bitten by the pair of tooth members, and then to stop based on the detection result obtained by the detection portion.

### Claim 9 (depends on 5)

A sheet processing apparatus, according to claim 5, wherein the control portion controls the motor to rotate so that the sheets are bitten by the pair of tooth members, and then to stop based on the detection result obtained by the detection portion in a state in which the one of the pair of tooth members is away from the other one of the pair of tooth members.

### Claim 10 (depends on 5)

A sheet processing apparatus, according to claim 5, wherein the cam is rotated in one direction from when the control portion controls the motor to start rotation so that the sheets are bitten by the pair of tooth members until the control portion controls the motor to stop.

### Claim 11 (depends on 5)

A sheet processing apparatus, according to claim 5, wherein the cam is rotated in one direction from when the control portion controls the motor to start rotation so that the sheets are bitten by the pair of tooth members until the control portion controls the motor to stop based on the detection result obtained by the detection portion.

### Claim 12 (depends on 5)

A sheet processing apparatus, according to claim 5, further comprising:
an image forming unit configured to form an image on a sheet.