Sheet processing apparatus and sheet processing method

Details Sheet processing apparatus and sheet processing method Sheet processing apparatus and sheet processing method

2008-03-07

2009-08-25

Crawford, Gene (Department: 3651)

Sheet-material associating

Associating or disassociating

Sheet associating

Reexamination Certificate

active

07578498

ABSTRACT:
A sheet processing apparatus includes a hole punching section arranged downstream from a skew detecting unit and orthogonally to a conveying path of a sheet, and a control unit configured to change the tilt angle of the hole punching section in accordance with each of the quantity of skew at the forward edge and the quantity of skew at the rear edge of the sheet, carry out skew correction at the forward edge within a first correction range w1, and carry out skew correction at the rear edge within a second correction range w2(where w1>w2≧w1/2). The control unit carries out skew correction at the forward edge within the correction range w2, in the case where the detected quantity of skew at the forward edge is a tilt angle exceeding the correction range w2, and then carries out skew correction at the rear edge in accordance with the difference between the quantity of skew at the forward edge after the correction and the quantity of skew at the rear edge.

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