Patent ID: 7862026

Claim:
A sheet post-processing apparatus comprising: a processing tray that aligns stacked one or plural sheets; a stacking tray on which the sheet(s) aligned by the processing tray is stacked; and a conveying mechanism that conveys the sheet(s) aligned by the processing tray to the stacking tray, the conveying mechanism includes: a sheet conveyor belt, a side of which opposed to the sheet(s) moves in a direction of the stacking tray; and a bundle claw that is attached to the sheet conveyor belt and regulates a position of a trailing end of the sheet(s), with a stepped profile and when attached to the sheet conveyor belt combines with the surface of the sheet conveyor belt to form a concavity comprising a stepped surface located in the bottom of the concavity, the stepped surface comprises a lower step and an upper step, the lower and upper step surfaces regulate the position of the trailing end of the sheet(s) located in and against the stepped surface of the concavity, the lower step surface comes into contact with the sheet conveyor belt and is recessed deeper into the bundle claw than the upper step surface, the lower step surface is located closer to the sheet conveyor belt than the upper step surface.