# US 8,740,215 B2 · Sheet conveying apparatus and image forming apparatus

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- Number: US 8,740,215 B2
- Document ID: US8740215B2
- Status: Granted
- Kind: B2
- Application number: 13/845,428
- Filed: 2013-03-18
- Published: 2013-08-22
- Granted: 2014-06-03
- Earliest claimed: 2011-03-16
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Kenji Watanabe; Yohei Suzuki; Motohiro Furusawa; Minoru Kawanishi
- Web page: https://patentgrep.com/patent/US8740215B2

## CPC

- B65H 9/00: Registering, e.g. orientating, articles; Devices therefor
- B65H 9/004: {Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet}
- B65H 9/06: Movable stops or gauges, e.g. rising and falling front stops {(B65H11/007 takes precedence)}
- G03G 15/6529: {Transporting (G03G15/6555 takes precedence)}
- B65H 2404/722: movable in operation
- G03G 2215/00409: Transfer device
- G03G 2215/00616: Optical detector
- G03G 2215/00628: Mechanical detector or switch
- G03G 2215/00721: of sheet position
- B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A sheet conveying apparatus, including: a first conveying portion; a second conveying portion arranged downstream of the first conveying portion; a shutter member rotated by the pressure of the sheet and including a plurality of abutment surfaces against which a leading edge of the sheet conveyed by the first conveying portion abuts to correct a skew feed of the sheet; and an urging portion which provides the shutter member with an urging force for positioning one abutment surface at an abutment position at which the leading edge of the sheet abuts against the one abutment surface, the urging portion providing the shutter member with an urging force for rotating the shutter member to position another abutment surface at the abutment position after the leading edge of the sheet is nipped by the second conveying portion.

## Claims

### Claim 1

A sheet conveying apparatus, comprising:
a first conveying portion which conveys a sheet;
a second conveying portion provided downstream of the first conveying portion which conveys the sheet conveyed by the first conveying portion;
a shutter member which rotates by being pressed by the conveyed sheet and includes a plurality of abutment surfaces against which a leading edge of the sheet conveyed by the first conveying portion abuts, the plurality of abutment surfaces being formed in a peripheral direction of the shutter member;
a shaft connected to the shutter member to rotatably support the shutter member;
a first rotary member connected to the shaft;
a second rotary member connected to the first rotary member; and
a biasing portion connected to a part of the second rotary member located offset with respect to a rotation center of the second rotary member to hold the second rotary member at a predetermined position and to position one abutment surface of the plurality of abutment surfaces upstream of the second conveying portion,
wherein the second rotary member rotates at a speed ratio of the second rotary member to the first rotary member when the first rotary member rotates, the speed ratio being the same number as a number of the plurality of abutment surfaces.

### Claim 2 (depends on 1)

A sheet conveying apparatus according to claim 1,
the biasing portion is an elastic member having one end positionally-fixed and another end connected to the second rotary member.

### Claim 3 (depends on 1)

A sheet conveying apparatus according to claim 1, wherein the biasing portion is a spring having one end positionally-fixed and another end connected to the second rotary member.

### Claim 4 (depends on 1)

A sheet conveying apparatus according to claim 1, wherein the biasing portion holds the shutter member at a position at which the leading edge of the sheet conveyed by the first conveying portion abuts against one abutment surface of the plurality of abutment surfaces.

### Claim 5 (depends on 1)

A sheet conveying apparatus according to claim 1, wherein the second conveying portion is positioned to nip the sheet when the leading edge of the sheet conveyed by the first conveying portion abuts against one abutment surface of the plurality of abutment surfaces of the shutter member.

### Claim 6 (depends on 1)

An image forming apparatus, comprising:
a sheet conveying apparatus as recited in claim 1; and
an image forming portion which forms an image on a sheet conveyed by the sheet conveying apparatus.