Patent ID: 9278825
Filing Date: 2016-03-08
CPC Classification: B65H

Claim Text:
1. A post-processing device comprising: a stacking member on which recording materials that are sequentially transported are stacked; a pair of discharge sections that nips and transports the recording material stacked on the stacking member; an accommodation section in which the recording material discharged by the discharge sections is stacked and accommodated; and a moving member that moves between a contact position where the moving member comes into contact with the recording material that is stacked on the stacking member and a non-contact position where the moving member does not come into contact with the recording material, wherein when the recording material is transported to the stacking member, the recording material is supported from a rear surface by the moving member at the contact position, wherein the moving member includes a tamper mechanism provided with a pair of tampers placed to face each other on the stacking member, and line-symmetrically moves to a gap narrower than a recording material width of the recording material with respect to an axis of symmetry parallel to an axis in a transport direction of the recording material before a front end portion of the recording material is transported onto the stacking member, wherein the pair of tampers are provided to move to a non-contact position of and form a gap wider than a width of the recording material, thereby stopping support of the discharged recording material, and wherein upper surface of the moving member is formed to protrude further than a nip area between the pair of discharge sections, so that an entire cross-section of the recording material, in a sheet width direction, is deformed into a concave shape.