Sheet finisher and image forming system equipped therewith

摘要

A sheet finisher (200) connected to an image forming apparatus (100), includes: an aligning unit (220) having an aligning plate (221,222) which aligns in a primary scanning direction a recording sheet (P) that has been conveyed from the apparatus (100); and a controller (201) which receives any one of correction information of an image forming position and detection information of a recording sheet edge for each sheet feed tray on a side of the apparatus, and determines an alignment position by referring to any one of the information.