Patent ID: 7845625
Filing Date: 2010-12-07
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 based on a sheet stack information, wherein the sheet stack information includes a number of sheets in the sheet stack supported by the sheet stack support member, and wherein the control portion changes the position where the sheet stack is abutted against the abutting member to be lower than the predetermined fold position, when the number of sheets in the sheet stack supported by the sheet stack support member is larger than a predetermined number.