Sheet processing apparatus and image forming system

摘要

A sheet processing apparatus includes an overlap conveying unit that conveys two or more sheets in an overlapping manner; a stacking unit that stacks therein the sheets conveyed in the overlapping manner; an aligning unit that includes a rotating body and a regulating member and is configured to bring the rotating body into contact with a topmost sheet among the stacked sheets, so as to make the sheet abut the regulating member and align ends of the sheets; and a controller that controls the overlap conveying unit. The controller is configured to determine, according to sheet information, whether to make the topmost sheet overlap in a condition of projecting from the other sheets.

主权项

1. A sheet processing apparatus comprising:
a first conveying path; an overlap conveying unit on the first conveying path that conveys two or more sheets in an overlapping manner; a second conveying path; a pre-stack portion on the second conveying path; a stacking unit that stacks therein the sheets conveyed in the overlapping manner; an aligning unit that includes a rotating body and a regulating member and is configured to bring the rotating body into contact with a topmost sheet among the stacked sheets, so as to make the sheet abut the regulating member and align ends of the sheets; and a controller that controls the overlap conveying unit, wherein the controller is configured to, according to sheet information,
operate the overlap conveying unit in reverse such that a portion of the preceding sheet is moved to the pre-stack portion, andstop the overlap conveying unit when the topmost sheet overlaps the preceding sheet and subsequently start the overlap conveying unit such that the overlapped sheets are conveyed in an overlapping condition.