Patent ID: 7134370

Claim:
A method for controlling a sheet processing apparatus said sheet processing apparatus including: a positioning unit arranged to position each of sequentially conveyed sheets at a predetermined position, wherein said positioning unit positions a sheet at a predetermined punching position in a direction substantially orthogonal to a conveying direction of the sheet, by grasping both end portions of the sheet in a lateral direction; an accommodating unit disposed at a portion upstream of said positioning unit and arranged to accommodate the sheet to be conveyed to said positioning unit; a punching unit arranged to perform punching one-by-one for a sheet positioned by said positioning unit; and a discharge unit arranged to discharge a sheet punched by said punching unit, said method for controlling the sheet processing apparatus comprising: a first controlling step of making said positioning unit operate to position one-by-one the sheet prior to a punching operation by said punching unit; and a second controlling step of making said accommodating unit accommodate subsequently conveyed sheets during the positioning operation or the punching operation.