US 8,146,916 B2Granted

Sheet conveying apparatus and image forming apparatus

AssigneeCanon Kabushiki Kaisha

InventorsFumiki Inui, Kazunari Nishimoto

Life of this patent

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Abstract

Positioning in the width direction of a sheet is performed by a skew correcting unit which is provided on a re-conveying path for reversing the sheet and conveying it again to an image forming unit and which has a reference surface that is come into contact with a side edge of the sheet and a plurality of diagonal feed units which obliquely convey the sheet so as to be come into contact with the reference surface. The pressures in nip portions of the other diagonal feed units excluding one of the plural diagonal feed units are reduced or cancelled by a reducing/cancelling unit according to a length in the sheet conveying direction of the sheet which is conveyed.

Claims7

Dependent claims

An image forming apparatus has an image forming unit configured to form an image on a sheet, the image forming apparatus comprising:

a conveying path configured to guide the sheet;
a reference surface, provided on the conveying path, to which a side edge of the sheet abuts;
and
a first diagonal feed unit and a second diagonal feed unit which diagonally convey the sheet so as to abut the side edge of the sheet to the reference surface for correcting the skew of sheet;
wherein the first diagonal feed unit and the second diagonal feed unit are arranged in a sheet conveying direction, and
wherein, in a case in which a length of the sheet conveyed is longer than a predetermined length, a pressure of a nip portion of the second diagonal feed unit is reduced or canceled and the first diagonal feed unit diagonally conveys the sheet, and
wherein the first diagonal feed unit conveys the sheet without reducing or cancelling a pressure of a nip portion thereof, regardless of the length of the sheet conveyed.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/499,333Filed 8 Jul 2009 · division
Priority: JP 2006-08668927 Mar 2006
Published: US 2009/0267292 A129 Oct 2009
Granted: 3 Apr 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B65H 9/166
Inclined tape, roller, or like article-forwarding side registers: roller
B65H 2220/09
Function indicators: indicating that several of an entity are present
B65H 2404/14
Rollers: roller pairs
B65H 2511/11
Size; Dimensions: length

Family

Application11/682,389Parent of this division · filed 6 Mar 2007
US 2009/0267292 A1Pre-grant publication · published 29 Oct 2009
US 7,571,908 B2Parent of this division
US 2007/0222144 A1Published application
US 8,146,916 B2This patent

From the US filing history. Foreign family members aren’t listed.

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