Sheet processing apparatus and image forming device having the same
AssigneeCanon Kabushiki Kaisha
InventorDaisaku Kamiya
Life of this patent
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Abstract
A sheet processing apparatus staples a bundle of sheets, folds the sheets into two to make a book, and presses the folded sheets. A stitch bookbinding unit moves a press unit having press rollers and, a press holder, and the like constituting a creasing unit along the fold of a bundle of sheets subjected to the folding process by the press rollers and so as to reliably nip-press the fold by the nip between the moving press rollers and for pressing it. The press holder performs intermittent movement in which it is stopped during movement.
Claims11
A sheet processing apparatus having:
- a folding unit which performs a folding process to a sheet bundle made up of a plurality of sheets;
- a creasing unit which presses a fold of the sheet folded by the folding unit;
- a moving unit which brings relative movement between the creasing unit and the folded sheet bundle in a direction parallel to the fold;
- and
- a controlling unit which controls the moving unit,
- wherein the controlling unit controls the moving unit so that the relative movement between the creasing unit and the folded sheet bundle makes a stop for a stop time at least once while the creasing unit presses the fold.
An image forming apparatus comprising:
- an image forming portion which forms an image on a sheet;
- and
- a folding unit which performs a folding process to a sheet bundle made up of a plurality of sheets;
- a creasing unit which presses a fold of the sheet bundle folded by the folding unit;
- a moving unit which brings relative movement between the creasing unit and the folded sheet bundle relatively in a direction parallel to the fold;
- and
- a controlling unit which controls the moving unit,
- wherein the controlling unit controls the moving unit so that the relative movement between the creasing unit and the folded sheet bundle makes a stop for a stop time at least once while the creasing unit presses the fold.
An image forming apparatus comprising:
- an image forming portion which forms an image on a sheet;
- a sheet processing apparatus which processes the sheet formed with the image;
- and
- a controlling unit which controls the sheet processing apparatus,
- the sheet processing apparatus having:
- a folding unit which performs a folding process to a sheet or the bundle of sheets
- a creasing unit which presses a fold of the sheets folded by the folding unit;
- and
- a moving unit which moves the creasing unit and the folded sheets relatively in a direction parallel to the fold,
- wherein the controlling unit controls the moving unit so that the relative movement between the creasing unit and the folded sheet is intermittently stopped while the fold is being pressed by said fold strengthening mechanism.
Dependencies are inferred from the claim text.