# US 7,195,238 B2 · Sheet conveying apparatus and image forming apparatus

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- Number: US 7,195,238 B2
- Document ID: US7195238B2
- Status: Granted
- Kind: B2
- Application number: 10/889,118
- Filed: 2004-07-13
- Published: 2005-02-17
- Granted: 2007-03-27
- Earliest claimed: 2003-07-23
- Assignees: Canon Kabushiki Kaisha
- Inventors: Takeshi Suga; Hiroshige Inoue
- Web page: https://patentgrep.com/patent/US7195238B2

## CPC

- B65H 9/002: {changing orientation of sheet by only controlling movement of the forwarding means, i.e. without the use of stop or register wall}
- B65H 9/16: Inclined tape, roller, or like article-forwarding side registers
- B65H 2404/14212: rotating, pivoting or oscillating around an axis perpendicular to the roller axis
- B65H 2511/212: Rotary position
- B65H 2511/24: Irregularities, e.g. in orientation or skewness
- B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES

## Abstract

A sheet conveying apparatus for conveying a sheet using a sheet conveying unit arranged along a sheet conveying path has a skew detecting unit for detecting skew of the sheet conveyed along the sheet conveying path with respect to a sheet conveying direction, a skew correcting unit that moves in a direction for correcting the skew of the skewed sheet with the sheet nipped therein on the basis of a detection signal from the skew detecting unit, and a guide unit for supporting the skew correcting unit and guiding the sheet to the skew correcting unit, in which, when the skew correcting unit moves for correcting the skew of the sheet, the guide unit is moved together with the skew correcting unit to prevent a load from being applied to a trailing edge of the sheet.

## Claims

### Claim 1

A sheet conveying apparatus for conveying a sheet using sheet conveying means arranged along a sheet conveying path, comprising:
skew detecting means for detecting skew of the sheet conveyed along the sheet conveying path with respect to a sheet conveying direction;
skew correcting means that moves in a direction for correcting the skew of the skewed sheet with the sheet nipped therein on the basis of a detection signal from the skew detecting means; and
guide means supported by said skew correcting means for guiding the sheet to the skew correcting means,
wherein, when the skew correcting means moves for correcting the skew of the sheet, the guide means is moved together with the skew correcting means so as to prevent a load from being applied to a trailing edge side of the sheet.

### Claim 2 (depends on 1)

A sheet conveying apparatus according to claim 1,
wherein the guide means is integrally provided in the skew correcting means.

### Claim 3

A sheet conveying apparatus for conveying a sheet, comprising:
a skew conveying detection sensor that is arranged on a sheet conveying path;
a skew correction roller pair that rotates in a direction for correcting skew of a skewed sheet with the sheet nipped therein on the basis of a detection signal from the skew conveying detection sensor; and
a guide that guides the sheet to said skew correction roller pair wherein said guide is arranged on an upstream side of said skew correction roller pair.
wherein said guide is integral with said skew correction roller pair, when said skew correction roller pair corrects skew of the skewed sheet, said guide rotates together with said skew correction roller pair so as to prevent a load from being applied to a trailing edge side of the sheet.

### Claim 4 (depends on 1, 2, 3)

An image forming apparatus, comprising:
an image forming portion that forms an image on a sheet; and
a sheet conveying apparatus according to any one of claims 1, 2 and 3 that conveys the sheet to the image forming portion.