Patent ID: 8328186

Claim:
A sheet processing method comprising: clamping a rear end in a conveying direction of a first sheet conveyed to a standby tray; receiving a second sheet next conveyed to the standby tray; releasing clamp on a lower surface of the rear end of the first sheet when opening the standby tray in a width direction crossing the conveying direction and dropping the first and second sheets received by the standby tray; receiving the first and second sheets dropped from the standby tray by a processing tray; supporting the lower surface of the rear end of the first sheet conveyed to the standby tray by a rear end support member; pressing an upper surface of the rear end of the first sheet supported by the rear end support member by a rear end press member; and clamping the rear end of the first sheet by the rear end support member and the rear end press member, wherein the rear end support member comprising a plurality of rear end support member parts separated by a distance in an axial direction of a rotary member which comprises the rear end support member, the rear end press member pressing the upper surface of the rear end in the conveying direction of the first sheet supported by two of the rear end support member parts between the two rear end support member parts, and the first sheet being clamped by the rear end press member and the two rear end support member parts.