Patent ID: 9016679
Filing Date: 2015-04-28
Classification: B31F,B65H,G03G

Abstract:
1. A sheet processing apparatus comprising: a first conveying unit that includes a pair of members to convey a sheet; a second conveying unit that includes a pair of members to receive the sheet conveyed by the first conveying unit and conveying the sheet to a subsequent stage; a folding processing unit that folds the sheet by rotating the second conveying member in a reverse direction in a condition in which the sheet is held by the first conveying member and the second conveying member; a first detecting unit that is disposed upstream of the first conveying member in a sheet conveying direction and detects an end portion of the sheet; a second detecting unit that is disposed downstream of the second conveying member in the sheet conveying direction and detects an end portion of the sheet; a calculating unit that calculates an amount of deflection of the sheet held by the first conveying member and the second conveying member from timings at which the sheet is detected by the first detecting unit and the second detecting unit and a distance between disposed positions of the first detecting unit and the second detecting unit; and a control unit that sets, from the calculated amount of deflection of the sheet, an amount of conveyance for the first conveying member in a direction opposite to the sheet conveying direction in a condition in which the sheet is held by the first conveying member and the second conveying member.