Sheet post-processing apparatus and image forming system

Abstract

According to one embodiment, a sheet post-processing apparatus includes: a standby unit configured to put a sheet on standby, the standby unit including a tray member on which the sheet is placed; a corrugation forming unit configured to form a corrugation in a direction orthogonal to a conveying direction on the sheet in the standby unit, the corrugation forming unit integrally provided with the tray member; and a processing unit disposed below the standby unit and configured to process the sheet supplied from the standby unit, wherein the corrugation forming unit includes: a projecting roller projecting upward from a conveyance reference plane in the standby unit; and a housing unit configured as a part of the tray member to house the projecting roller below the conveyance reference plane.

Dependencies are inferred from the claim text.