Fold-enhancing device, post-pressing apparatus equipped with fold-enhancing device, and processing apparatus equipped with fold-enhancing device

A fold-enhancing device comprising:

• a pressing member configured to press against a fold line of a recording-medium bundle folded into a booklet shape, the recording-medium bundle being obtained by stacking a plurality of sheets of recording media;
• at least one retaining member being configured to retain the recording-medium bundle, the retaining member being further configured to be provided at a position located away from the fold line in a direction intersecting the fold line and not in contact with the pressing member;
• and
• a moving mechanism configured to move the pressing member and the retaining member in a direction extending along the fold line,
• wherein the retaining member includes a plurality of retaining members that are separated from each other in the direction extending along the fold line with respect to a center of the pressing member.

A fold-enhancing device comprising:

• a pressing member configured to press against a fold line of a recording-medium bundle folded into a booklet shape, the recording-medium bundle being obtained by stacking a plurality of sheets of recording media;
• at least one retaining member configured to retain the recording-medium bundle, the retaining member further configured to be provided at a position located away from the fold line in a direction intersecting the fold line and not in contact with the pressing member;
• and
• a moving mechanism configured to move the pressing member and the retaining member in a direction extending along the fold line,
• wherein the moving mechanism has a contact-noncontact mechanism configured to move the pressing member and the retaining member into contact with and away from the recording-medium bundle in a thickness direction of the recording-medium bundle, and
• wherein the contact-noncontact mechanism is further configured to cause, in a case in which the pressing member and the retaining member come into contact with the recording-medium bundle, the retaining member to come into contact with the recording-medium bundle prior to the pressure member, and wherein, the contact-noncontact mechanism is further configured to cause, in a case in which the pressing member and the retaining member move away from the recording-medium bundle, the pressing member to move away from the recording-medium bundle prior to the retaining member.