Sheet processing system, apparatus capable of reducing amount of positional error of conveyed sheet, and method of controlling sheet processing system

摘要

A sheet processing system capable of performing lateral shift correction of a sheet in an upstream sheet processing apparatus based on an amount of lateral shift to be caused by conveying thereof into a downstream sheet processing apparatus. A side edge sensor of a stacker detects a lateral shift amount of a sheet conveyed into the stacker. A stacker controller corrects lateral shift of the sheet by a shift unit. A side edge sensor of a finisher disposed downstream of the stacker detects a lateral shift amount of a sheet conveyed into the finisher. The finisher sends the detected lateral shift amount to the stacker. The stacker receives the lateral shift amount from the finisher, and the stacker controller corrects lateral shift of subsequent sheets based on both the lateral shift amount detected in the stacker and the lateral shift amount sent from the finisher.