Square back processing with variable nipping

摘要

A post-processing apparatus includes a folding section configured to nip a sheet using a plurality of rollers to form a fold line for saddle stitching and a control section to control the nipping amount in the folding section. When carrying out square back processing to flatten the spine folded portion of a sheet bundle where a fold line for saddle stitching is formed, the post-processing apparatus allows the nipping amount in the folding section to be smaller than that in the case where the square back processing is not carried out.

主权项

1. A post-processing apparatus which performs post-processing of a sheet where an image is formed, the post-processing apparatus comprising:
a folding sector configured to nip a sheet using a plurality of rollers to form a fold line for saddle stitching while inserting a knife into a portion of the sheet; and a control section configured to control the nipping amount in the folding section so that the nipping amount in the case where square back processing to flatten a spine folded portion of a sheet bundle on which a fold line for saddle stitching is formed is performed is smaller than the nipping amount in the folding section in the case where the square back processing is not performed by making the insertion amount of the knife in the case where the square back processing is performed smaller than the insertion amount of the knife in the case where the square back processing is not performed.