Patent ID: 7699310

Claim:
A post-processing apparatus comprising: a processing tray on which a plurality of sheets of paper are placed; a pair of conveying rollers provided on an upstream side of the processing tray along a conveying direction thereof, the pair of conveying rollers conveying a sheet of paper to the processing tray; and a paper pressing member disposed near an upstream end of the processing tray so as to face the upstream end of the processing tray, wherein the paper pressing member comprises: a paper pressing unit having rotational shafts each extending in a direction that is parallel to a paper receiving surface of the processing tray and is orthogonal to a direction in which a sheet of paper is conveyed, and a plurality of paper pressing portions each being disposed parallel to the rotational shafts and having a surface at which the paper pressing portion is brought into contact with the sheet of paper, the surface being located on a surface of a circular cylinder whose cylindrical axis corresponds to a line passing through the rotational shafts; and a unit driving motor driving the paper pressing unit to rotate, wherein the paper pressing unit has a space between one pressing a rear end of the sheet of paper and the other of the plurality of paper pressing portions, and a next sheet of paper passing through the pair of conveying rollers is conveyed to the processing tray through the space while the rear end of the sheet of paper that has already been placed on the processing tray is pressed by the one of the plurality of paper pressing portions.