| US 7,571,908 B2 | ||
| Sheet conveying apparatus and image forming apparatus | ||
| Fumiki Inui, Mishima (Japan); and Kazunari Nishimoto, Numazu (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Mar. 06, 2007, as Appl. No. 11/682,389. | ||
| Claims priority of application No. 2006-086689 (JP), filed on Mar. 27, 2006. | ||
| Prior Publication US 2007/0222144 A1, Sep. 27, 2007 | ||
| Int. Cl. B65H 9/16 (2006.01) | ||
| U.S. Cl. 271—251 [271/248; 271/250; 271/252; 271/228] | 4 Claims |
| 1. An image forming apparatus in which a sheet with an image formed on one surface by an image forming unit is reversed and
conveyed again to the image forming unit, comprising:
a re-conveying path which reverses the sheet having the image formed on one surface by the image forming unit and guides the
sheet again to the image forming unit;
a skew correcting unit provided on the re-conveying path, having a reference surface to which a side edge of the sheet abuts,
and a plurality of pairs of rotary members which diagonally convey the sheet and abut the sheet to the reference surface;
a changing unit which reduces or cancels a contact pressure of one of the pairs of rotary members excluding another one of
the pairs of rotary members;
a holding member which holds the plurality of pairs of rotary members; and
a moving unit which moves the holding member in a width direction which perpendicularly crosses the sheet conveying direction
according to a size of the sheet which is conveyed,
wherein the changing unit is controlled to reduce or cancel the contact pressure according to a length of the conveyed sheet
in a sheet conveying direction,
wherein the changing unit reduces or cancels the contact pressure in an interlocking relational manner with the movement in
the width direction of the holding member.
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