Patent ID: 8292283

Claim:
A post-processing apparatus comprising: a processing tray for collecting a sheet that is sequentially fed to perform binding processing; a sheet carry-in path for guiding the sheet from a carry-in entrance to the processing tray; a folding processing path that branches off from the sheet carry-in path to perform folding processing on a sheet fed from the carry-in entrance; a folding processing section disposed in the folding processing path; and a pair of folding rolls disposed in the folding processing section to perform folding processing, wherein on the downstream side of the folding processing path is provided a folded sheet carrying-out path for carrying out a folded sheet subjected to the folding processing in the folding processing section, and the folded sheet carrying-out path is comprised of a circulating path for guiding the folded sheet from the folding processing section to the folding processing path and carrying the sheet again to the folding processing section, a post-processing path for guiding the folded sheet from the folding processing section to the processing tray, and a sheet discharge path for guiding the folded sheet from the folding processing section to a storage stacker.