Patent ID: 8602405

Claim:
A sheet processing apparatus, comprising: a process tray onto which a sheet is stacked; an aligning member that conveys the sheet toward a sheet edge regulating member in a contact state in which the aligning member is in contact with the sheet, the sheet edge regulating member regulating the edge of the sheet; and a switching member that switches a state of the aligning member between the contact state where, at a contact position in which the aligning member comes into contact with the sheet conveyed onto the process tray, the aligning member is in contact with the sheet, and a non-contact state where the aligning member is spaced apart from the process tray, wherein, while the sheet on the process tray is being conveyed toward the sheet edge regulating member by the aligning member, the switching member switches the aligning member from the contact state to the non-contact state, and further switches the aligning member from the non-contact state to the contact state.