Sheet conveying apparatus and image forming apparatus

Details Sheet conveying apparatus and image forming apparatus Sheet conveying apparatus and image forming apparatus

2007-03-06

2009-08-11

Mackey, Patrick H (Department: 3653)

Sheet feeding or delivering

Feeding

With means to align sheet

C271S248000, C271S250000, C271S252000, C271S228000

Reexamination Certificate

active

07571908

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.

REFERENCES:
patent: 5162857 (1992-11-01), Higeta et al.
patent: 5253862 (1993-10-01), Acquaviva et al.
patent: 5316288 (1994-05-01), Fish et al.
patent: 5657983 (1997-08-01), Fisk
patent: 6273418 (2001-08-01), Fujikura et al.
patent: 6324377 (2001-11-01), Ando et al.
patent: 7306221 (2007-12-01), Agata
patent: 2004/0188929 (2004-09-01), Tada et al.
patent: 2000-233850 (2000-08-01), None

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