A sheet processing apparatus operable to perform creasing processing on media, and a method of controlling the same, accept an offset position of a crease for folding of a cover of a bookbinding product which is a length from an edge of a spine of the bookbinding product, and acquire a position of the crease for folding corresponding to the cover using at least a size of the cover, the offset position, and a thickness of the bookbinding product. Based on the acquired position of the crease, creasing processing is executed on the cover.

An image forming apparatus determines whether crease processing at a plurality of portions set on the sheet includes crease processing on two, front and back surfaces of the sheet; determines, if it is determined that crease processing includes crease processing on the two surfaces of the sheet, whether a connected post-processing apparatus that performs crease processing on a sheet can perform crease processing on the two, front and back surfaces of the sheet by one feeding; and controls, if it is determined that the connected post-processing apparatus cannot perform crease processing on the two surfaces by one feeding, to change, to one of the front and back surfaces of the sheet based on attribute information of the sheet, a surface to be processed in crease processing at the plurality of portions.

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.

According to an embodiment, a sheet folding apparatus comprises a first roller, a second roller configured to be energized to the first roller, form a nip section together with the first roller, fold a sheet in half together with the first roller through the nip section and convey the sheet folded in half together with the first roller and a pressing force adjusting mechanism configured to be capable of increasing and decreasing a pressing force generated at the nip section. The pressing force adjusting mechanism causes a pressing force in a state of being conveying the sheet folded in half to be lower than that in a state of being folding the sheet in half.

A sheet conveying apparatus, including: a support portion configured to support a second sheet different from a first sheet among a plurality of sheets when the first sheet located undermost among the plurality of sheets conveyed by a conveyance portion is placeable on a placement portion; and a restriction unit configured to bring the second sheet into a first state in order to restrict downward movement of the second sheet at a restriction position located downstream of a support position at which the support portion supports the second sheet when the first sheet is placeable on the placement portion, and to bring the second sheet into a second state in order to remove or reduce a restriction force for restricting the downward movement of the second sheet to less than a restriction force in the first state after bringing the second sheet into the first state at the restriction position.

In accordance with an embodiment, a sheet post processing apparatus comprises a processing tray, a gluing section and a control section. Sheets are placed one by one in the processing tray. The gluing section enables glue to be adhered to the glue binding margin part of the sheets already placed in the processing tray. The control section includes a glue supply mode for supplying glue parts in such a manner that a glue part, which is different from a waiting glue part waiting for a next gluing when the previous glue binding is ended, is supplied to a glue adhering section of a first sheet for gluing with a second sheet through the gluing section.

A method of self-adaption adjustment for post-printing treatment including steps of S1: printing a plurality of identifiers on a paper sheet for positioning actual locations of treatment on the paper sheet; S2: detecting the identifiers on the paper sheet, and locating the actual locations to be treated according to the locations of the identifiers and/or relative locations among the identifiers; and S3: adjusting locations of treatment from a post-printing treatment mechanism to the paper sheet according to the actual locations output in step S2. A system of self-adaption adjustment for post-printing treatment including a printing module, a detection module, a treatment module, a driving module and a post-printing treatment mechanism. The method and system realize the self-adaption adjustment, which effectively solves the problems that an actual value after skewing or stretching or shrinking the actual printing content is inconsistent with a theoretical value of typesetting, thus effectively improving the production efficiency and production quality, which has favorable economic and social benefits. The method and system can be widely applied in various post-printing treatment systems.

An image forming apparatus determines whether crease processing at a plurality of portions set on the sheet includes crease processing on two, front and back surfaces of the sheet; determines, if it is determined that crease processing includes crease processing on the two surfaces of the sheet, whether a connected post-processing apparatus that performs crease processing on a sheet can perform crease processing on the two, front and back surfaces of the sheet by one feeding; and controls, if it is determined that the connected post-processing apparatus cannot perform crease processing on the two surfaces by one feeding, to change, to one of the front and back surfaces of the sheet based on attribute information of the sheet, a surface to be processed in crease processing at the plurality of portions.

A recording material fold enhancing device includes a pressing unit that includes one or more recessed portions and one or more protrusions, and that presses a fold of a recording material; a supporting unit that includes one or more recessed portions and one or more protrusions, and that supports the fold of the recording material; and a driving unit that moves the pressing unit and the supporting unit along a direction in which the fold of the recording material is formed. A portion of the fold of the recording material is interposed between the one or more recessed portions of the pressing unit and the one or more protrusions of the supporting unit, and another portion of the fold of the recording material is interposed between the one or more protrusions of the pressing unit and the one or more recessed portions of the supporting unit.

An image forming system includes an image forming apparatus configured to print images on a plurality of sheets; a plurality of folding apparatuses configured to perform a folding process on the plurality of sheets; a memory; and a processor coupled to the memory and configured to switch between the plurality of folding apparatuses for each of the plurality of sheets such that the folding process is performed on the plurality of sheets in continuous printing, and eject one or more sheets on which the folding process is performed by each of the plurality of folding apparatuses to a corresponding ejection tray, wherein an order of the images to be printed on the plurality of sheets in the continuous printing is changeable.