Patent ID: 7607650

Claim:
An image-forming apparatus comprising: an image-forming portion configured to form images on a sheet; and a sheet-bundle treatment apparatus configured to fold the sheet having the images formed by the image-forming portion in bundles and treats a spine of the folded sheet-bundle, the sheet-bundle treatment apparatus including: a crease treatment unit configured to press a crease of a folded sheet-bundle while moving along a spine of the sheet-bundle in order to perform a spine crease treatment for fortifying the crease of the folded sheet-bundle; a back treatment unit configured to push a back of the spine of the folded sheet-bundle while moving along the spine of the sheet-bundle in order to perform a flattening treatment for flattening the back of the spine of the sheet-bundle; and a selection portion facilitating selecting operation of at least one of the crease treatment unit and the back treatment unit.