Patent ID: 7954795

Claim:
A post-processing apparatus comprising: an accumulating unit configured to accumulate plural paper sheets; a conveying unit configured to convey the plural paper sheets accumulated in the accumulating unit through a conveying path extending in a lateral direction; an aligning unit configured to align trailing ends in a conveying direction of the plural paper sheets accumulated in the accumulating unit; a stapling unit configured to staple the plural paper sheets with the trailing ends thereof aligned by the aligning unit and conveyed to a stapling position through the conveying path; a folding unit configured to fold the plural paper sheets stapled by the stapling unit and conveyed to a folding position through the conveying path, the folding unit including a roller pair that has a nip extending in a direction orthogonal to the conveying path below the conveying path and a folding blade that is arranged in a position opposed to the nip of the roller pair above the conveying path and driven downward to push the plural paper sheets, which are conveyed to the folding position between the folding blade and the nip, into the nip; a housing that surrounds the accumulating unit, the conveying unit, the aligning unit, the stapling unit, and the folding unit, the housing unit having a receiving unit configured to receive the plural paper sheets that are pushed into the nip by the folding blade and pass through the nip; and a supporting member projecting outside of the housing and configured to support a leading end in the conveying direction of the plural paper sheets when folding the plural paper sheets at the folding unit.