Patent ID: 7758034
Filing Date: 2010-07-20
Classification: B42B,B42C,B65H

Abstract:
1. A sheet post-processing device which comprises: storage means for storing sheets conveyed from an image forming device; matching means for regulating at least one end of a sheet bunch stored by said storage means to match said end of sheet bunch at a predefined matching position; staple means for stapling said sheet bunch stored by said storage means; first holding means for gripping and conveying said sheet bunch matched at the matching position back in a first direction opposite to said one end of said sheet bunch matched at the matching means, and subsequently conveying said sheet bunch forward in a second direction, second holding means to subsequently gripping and conveying said sheet bunch forward further in the second direction toward said one end of said sheet bunch; and a controlling means for controlling said stapling means so as to perform a first stapling after once the first holding means gripping and conveying the sheet bunch back in the first direction from said matching position and subsequently perform a second stapling or multiple staplings while the second holding means grips the sheet bunch after the first holding means conveying said sheet bunch forward in the second direction and prior to the second holding means conveys the sheet bunch further in the second direction.