POST-TREATMENT DEVICE, CONTROL METHOD FOR THE DEVICE, CONTROL PROGRAM, AND POST-TREATMENT SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a post-treatment device capable of aligning sheets in a sheet conveying direction with high accuracy at low cost.

SOLUTION: A finisher control part of a finisher 500 connected to an image forming apparatus selects one intermediate tray from a plurality of intermediate trays (a treatment tray 630 and a binding treatment tray 830) based on a signal from the image forming apparatus. The finisher control part further controls sheet stacking timing to stack newly conveyed sheets by shifting them by a predetermined deviation quantity in the sheet conveying direction with respect to at least one sheet retained at a buffer roller 505 according to the selected intermediate tray.

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