A mechanism that makes it possible to output a saddle-stitched brochure in a correct page order when a post-processing apparatus that executes a saddle-stitching process by switching back a sheet is caused to execute the saddle-stitching process. Sheets discharged from a printing apparatus are switched back by reverse rotation of a conveying roller pair, and are conveyed into a conveying path for a saddle-stitch bookbinding process. The sheets are accumulated in an accumulation tray for the saddle-stitch bookbinding process. When the saddle-stitch bookbinding process is caused to be executed on the accumulated sheets by the post-processing apparatus, the order of image formation is decided such that the order of pages of images printed on the saddle-stitched sheets becomes correct. The images are printed on the sheets in the decided order of image formation.

A mechanism that makes it possible to output a saddle-stitched brochure in a correct page order when a post-processing apparatus that executes a saddle-stitching process by switching back a sheet is caused to execute the saddle-stitching process. Sheets discharged from a printing apparatus are switched back by reverse rotation of a conveying roller pair, and are conveyed into a conveying path for a saddle-stitch bookbinding process. The sheets are accumulated in an accumulation tray for the saddle-stitch bookbinding process. When the saddle-stitch bookbinding process is caused to be executed on the accumulated sheets by the post-processing apparatus, the order of image formation is decided such that the order of pages of images printed on the saddle-stitched sheets becomes correct. The images are printed on the sheets in the decided order of image formation.

An image forming apparatus includes a moving member that is movable between a first position and a second position different from the first position, first stop member that is disposed corresponding to the first position and comes into contact with the moving member to stop the moving member in the first position, a second stop member that is disposed corresponding to the second position and comes into contact with the moving member to stop the moving member in the second position, a first shock absorber dial is disposed in at least one of the moving member and the first stop member, and absorbs impact at a time of contact, and a second shock absorber that is disposed in at least one of the moving member and the second stop member, and absorbs impact at a time of contact.

An image forming apparatus detects an attribute of paper for each sheet of paper. A post-process apparatus performs a post-process for each group of paper including a designated number of sheets of paper. A controller of the image forming apparatus determines for each sheet of paper, whether or not a designated post-process is prohibited based on prohibition rule data which defines permission and prohibition of the post-process in accordance with the attribute of paper for each type of post-process and the detected attribute of paper. When the controller determines that the designated post-process is prohibited, the controller determines whether or not a sheet of paper which resulted in determination as prohibition is a sheet of paper intermediate between the first sheet of paper and the last sheet of paper in the group of paper, and has an image forming system perform a process in accordance with a result of determination.

A sheet processing apparatus includes a blade having a plurality of teeth aligned in a row, a mover to move in a direction in which the plurality of teeth is aligned and form a perforation in a sheet sandwiched by the blade and the mover, and a pressure device to press the mover toward the blade.

A printing apparatus capable of producing a product having the optimum image layout dependent on a discharge destination even when saddle-stitching is canceled due to input of image data for sheets in excess of a limit of a saddle-stitchable number of sheets. The number of output sheets per one copy is calculated based on image data. When the number of output sheets per one copy exceeds a saddle-stitchable number of sheets, it is selected whether to perform the center folding processing on the sheets on which images are printed without performing the saddle stitching processing thereon or to perform neither the saddle stitching processing nor the center folding processing on the sheets on which images are printed.

A sheet processing apparatus includes: a conveying unit configured to convey a sheet along a sheet conveyance path; a conveyance-path supporting unit configured to support both ends of the sheet conveyance path with respect to a direction perpendicular to a sheet conveying direction; a first stitching unit configured to stitch the sheets conveyed; a second stitching unit configured to stitch the sheets conveyed; a first moving unit configured to move the first stitching unit in a direction perpendicular to the sheet conveying direction; and a second moving unit configured to move the second stitching unit in a direction perpendicular to the sheet conveying direction, wherein any one of the first stitching unit and the second stitching unit is movable to outside of the conveyance-path supporting unit.

A mechanism that makes it possible to output a saddle-stitched brochure in a correct page order when a post-processing apparatus that executes a saddle-stitching process by switching back a sheet is caused to execute the saddle-stitching process. Sheets discharged from a printing apparatus are switched back by reverse rotation of a conveying roller pair, and are conveyed into a conveying path for a saddle-stitch bookbinding process. The sheets are accumulated in an accumulation tray for the saddle-stitch bookbinding process. When the saddle-stitch bookbinding process is caused to be executed on the accumulated sheets by the post-processing apparatus, the order of image formation is decided such that the order of pages of images printed on the saddle-stitched sheets becomes correct. The images are printed on the sheets in the decided order of image formation.

A sheet processing apparatus includes a blade having a plurality of teeth aligned in a row, a mover to move in a direction in which the plurality of teeth is aligned and form a perforation in a sheet sandwiched by the blade and the mover, and a pressure device to press the mover toward the blade.

The present invention provides a post process control apparatus including a post processing unit configured to perform post processing on a printed sheet printed in accordance with a job, and a method for controlling the same, where the post process control apparatus and the method of controlling the same obtain a number of sheets in one copy of printed sheets instructed by the job, control the post processing unit to, if the obtained number of sheets in one copy is singular, execute the post processing in one batch on printed sheets corresponding to a plurality of copies, and to control the post processing unit to, if the obtained number of sheets in one copy is plural, execute the post processing individually by printed sheets corresponding to one copy.