Patent ID: 7575227
Filing Date: 2009-08-18
Classification: B65H

Abstract:
1. A sheet folding apparatus which folds a sheet stack, comprising: a sheet stack support member which supports a sheet stack by being abutted against a lower edge of the sheet stack; an abutting member whose leading edge abuts against the sheet stack to fold the sheet stack supported by the sheet stack support member; paired folding rollers which fold the sheet stack abutted by the abutting member at a predetermined fold position; and a control portion which changes a position where the sheet stack is abutted against the leading edge of the abutting member to be changed based on a sheet stack information, wherein the sheet stack information includes an information on an image formed on a portion of the sheet which is abutted against the leading edge of the abutting member, and the control portion changes the position where the sheet stack is abutted against the leading edge of the abutting member according to the image formed on the portion of the sheet which is abutted against the leading edge of the abutting member.