Patent ID: 9309075
Filing Date: 2016-04-12
CPC Classification: B65H

Claim Text:
1. A sheet processing apparatus comprising: a conveying unit which conveys sheets in order from a first sheet, a second sheet, and a third sheet; a pair of conveying rollers which is provided downstream of the conveying unit in a sheet conveying direction and conveys the sheets while nipping the sheets at a nip portion; a superimposing unit which is provided between the conveying unit and the pair of conveying rollers and superimposes a subsequent sheet on a preceding sheet in the sheet conveying direction, the superimposing unit being configured to superimpose the second sheet on the first sheet and superimpose the third sheet on the second sheet; a control unit which controls a rotation of the pair of conveying rollers; and an aligning portion provided downstream of the pair of conveying rollers in the sheet conveying direction and against which a leading end in the sheet conveying direction of a conveyed sheet abuts, wherein the control unit controls the rotation of the pair of conveying rollers so that a tail end of the first sheet passes the nip portion of the pair of conveying rollers by conveying the first sheet to a downstream side before a leading end of the third sheet superimposed on the second sheet reaches the nip portion between the pair of conveying rollers nipping the first sheet and the second sheet superimposed on the first sheet, and wherein a sheet bundle having an aligned leading end is formed by abutting a leading end of each one of a plurality of sheets against the aligning portion.