Patent ID: 6997451
Filing Date: 2006-02-14
Classification: B65H

Abstract:
1. A sheet post-processing device for post-processing a sheet, comprising: placement means for placing sheets discharged from an image forming apparatus; discharging means for successively discharging the sheets on the placement means; offset means for shifting an edge of a non-stitching sheet from an edge of a stitching sheet on the placement means by a predetermined distance according to whether the sheet discharged on the placement means is subjected to a stitching process; and stitching means for stitching edge portions of the stitching sheets in a stack in a state that the edge of the non-stitching sheet is shifted from the edges of the stitching sheets by the offset means, wherein in stitching the sheets, a first sheet and a last sheet in the sheets are not shifted by the offset means and stitched together to hold all sheets between the first and last sheets.