Patent ID: 9039002
Filing Date: 2015-05-26
Classification: B26D,B26F,B65H,Y10T

Abstract:
1. A sheet post-processing apparatus comprising: a moving member configured to have a cam and reciprocate; a drive unit configured to cause said moving member to reciprocate; a punching member configured to be driven by a movement of the cam of said moving member and punch a sheet when said moving member moves forth and moves back; a determination unit configured to determine a type of the sheet; and a control unit configured to, when a sheet to be punched is to be subjected to a punching process, control said drive unit such that said moving member starts moving before conveyance of the sheet to be punched stops, and when the sheet to be punched is to be subjected to the punching process, control said drive unit such that timing with which said moving member starts moving is changed based on the determination by said determination unit, wherein a type of an immediately preceding sheet punched prior to the sheet to be punched is a first type, said control unit controls said drive unit such that said moving member starts moving with earlier timing compared to a case where the type of the immediately preceding sheet is a second type that puts a heavier load on said drive unit than the first type.