A printing system comprises: a printing unit configured to print an image on a sheet; and a control unit configured to control to perform creasing at a first pressure at a portion, corresponding to an edge of a spine cover, of the sheet on which the printing unit has printed the image, and perform creasing at a second pressure different from the first pressure at a portion of the sheet that corresponds to a hinge.

An image forming apparatus including: a printer; a puncher configured to punch the sheet printed by the printer; a binder configured to perform a bookbinding process to form a bound product in which a binding member penetrates punch holes of sheets; a first detector configured to detect a first jam of a sheet in the binder; a second detector configured to detect a second jam of a sheet which occurs upstream of the binder; an annunciator configured to notify information; and a controller configured to cause the annunciator to notify first instruction information for instructing removal of a sheet and the binding member, when the first detector has detected the first jam; and cause the annunciator to notify second instruction information for instructing removal of the second jam when the second detector has detected the second jam and the first detector has not detected the first jam.

An image forming system that is capable of forming an image onto a sheet on a basis of print image data including multiple image data items imposed in such a manner as to be suitable for middle-folding and saddle-stitching and outputting a booklet by performing middle-folding and saddle-stitching includes: a storing unit that stores beforehand, as an output-processing content table, an inclination direction of a compilation tray onto which a stack of sheets that is to be subjected to imposition processing for pages or a facing page of the booklet and the middle-folding and saddle-stitching is placed; and a processing unit that generates the print image data by acquiring information of the inclination direction of the compilation tray, referencing to the output-processing content table, and performing the imposition processing.

A sheet processing apparatus includes a conveying portion, a stack portion on which sheets conveyed by the conveying portion are stacked, a first regulating portion regulating a position of a sheet bundle stacked on the stack portion in a crossing direction, a second regulating portion regulating a position of a sheet bundle on the stack portion in a conveying direction, a first binding device moved in the crossing direction and binding a corner portion of a sheet bundle by a staple, a second binding device binding a corner portion of a sheet bundle without a staple, and a controller positioning the first binding device and binding a corner portion of a sheet bundle by the first binding device. The controller also moves the second binding device and binds a corner portion of a sheet bundle without a staple by the second binding device.

A printing apparatus capable of conveying sheets to a sheet processing apparatus and to control the type of a sheet to be used as a cover sheet in a case where a book bound product is generated by switching back sheets each having an image printed, inverting the sheets and folding the inverted sheets, and to notify an error to a user based on the type of a sheet to be used as the cover sheet in a case where printing an image on the cover sheet is designated.

A booklet making apparatus includes a pressurizing member configured to oppose a first surface of a sheet bundle, a receiving member configured to oppose a second surface of the sheet bundle opposite to the first surface and nip the sheet bundle together with the pressurizing member, a moving portion configured to move the pressurizing member to a retracted position where the pressurizing member is retracted from the sheet bundle and a pressurizing position where the pressurizing member is in contact with the sheet bundle to pressurize the sheet bundle, a heating portion configured to heat the pressurizing member, and a sheet separation member configured to come into contact with the first surface of the sheet bundle and separate the sheet bundle from the pressurizing member in a process of the pressurizing member moving from the pressurizing position to the retracted position.

An image forming system includes an image forming apparatus and a sheet processing apparatus having a stacking unit, a moving unit, and a thermal compression bonding unit. The stacking unit includes a stack of plural sheet having an adhesive layer for bonding the plural sheets together. The thermal compression bonding unit includes a heating member having a heat generation area. In a case where a length of the adhesive layer regarding a longer-side direction of the heating member is greater than a length of the heat generation area, an entire area of the adhesive layer on the plural sheets is heated and pressed by applying heat and pressure to the adhesive layer more than once while changing, via the moving unit, a relative position of the plural sheets having been conveyed onto the stacking unit and the heat generation area regarding the longer-side direction of the heating member.

A printing apparatus capable of conveying sheets to a sheet processing apparatus and to control the type of a sheet to be used as a cover sheet in a case where a book bound product is generated by switching back sheets each having an image printed, inverting the sheets and folding the inverted sheets, and to notify an error to a user based on the type of a sheet to be used as the cover sheet in a case where printing an image on the cover sheet is designated.

A sheet processing apparatus for processing a sheet includes a setting portion to which a sheet bundle is set from an outside of the apparatus, a conveying route in which a sheet is conveyed, a stack portion on which sheets conveyed from the conveying route are stacked, the stack portion being arranged at a different position of the setting portion, a binding unit which binds a sheet bundle set in the setting portion and a sheet bundle stacked in the stack portion, and a punching portion which forms a punch hole on a sheet, which is conveyed in the conveying route. The setting portion is arranged as being overlapped to the punching portion in a direction of intersecting with a conveying direction of a sheet conveyed in the conveying route.

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.