Patent ID: 8833751
Filing Date: 2014-09-16
Classification: B41L,B42B,B42C,B65H,G03G

Abstract:
1. A sheet processing apparatus comprising: a processing tray on which sheets are to be stacked; a stapler configured to staple a sheet bundle comprised of sheets stacked on said processing tray; a discharge unit configured to discharge the sheet bundle stapled by said stapler to a sheet discharge tray; a shift unit configured to shift a sheet bundle in a direction perpendicular to a direction of discharge by said discharge unit before the sheet bundle is discharged by said discharge unit; a detection unit configured to detect presence or absence of a staple in a sheet bundle that is being discharged by said discharge unit after said stapler operates; and a control unit configured to control an operation of said shift unit on a sheet bundle to be discharged next according to a result of detection by said detection unit, wherein in a case where the sheet bundle, for which said detection unit has detected that a staple is not present therein, has been shifted by said shift unit, said control unit controls said shift unit to not shift a sheet bundle to be discharged next, and wherein in a case where the sheet bundle, for which said detection unit has detected that a staple is not present therein, has not been shifted by said shift unit, said control unit controls said shift unit to shift a sheet bundle to be discharged next.