A printing system includes: a driver that accepts a user operation related to setting of a print job and provides an instruction related to the print job; a printing unit that performs cover/interleaving paper printing in which printing is performed with at least a cover or an interleaving paper inserted, on the basis of the instruction; a booklet creating unit that performs booklet creation processing of creating a booklet by center-folding the cover and sandwiching other center-folding printed papers, on the basis of the instruction; and a pre-processing unit that performs processing of making a linear bending mark or a folding mark as pre-processing at a position on the cover, before the center-folding, at which the center-folding is to be performed, on the basis of the instruction.

An image forming apparatus includes a fixing unit configured to form a nip portion and fix a toner image to a recording material, and a speed control unit configured to control a conveyance speed of a recording material in the nip portion, wherein, in a case where glue binding is not performed, a recording material having a first basis weight is conveyed at a second speed greater than a first speed, and a recording material having a second basis weight greater, in basis weight, than the recording material having the first basis weight is conveyed at the first speed, and wherein, in a case where the glue binding is performed, the recording material having the first basis weight and the recording material having the second basis weight are conveyed at the first speed.

An image forming apparatus includes a fixing unit configured to form a nip portion and fix a toner image to a recording material, and a speed control unit configured to control a conveyance speed of a recording material in the nip portion, wherein, in a case where glue binding is not performed, a recording material having a first basis weight is conveyed at a second speed greater than a first speed, and a recording material having a second basis weight greater, in basis weight, than the recording material having the first basis weight is conveyed at the first speed, and wherein, in a case where the glue binding is performed, the recording material having the first basis weight and the recording material having the second basis weight are conveyed at the first speed.

In a case where a region of a heating pressurization unit in a longitudinal direction of the heating pressurization unit where the heating pressurization unit heats and pressurizes a sheet of a maximum size is a first region, and a region of the heating pressurization unit in the longitudinal direction where the heating pressurization unit heats and pressurizes a sheet of a minimum size is a second region, and a region of the heating pressurization unit inside the first region and outside the second region in the longitudinal direction is a third region, the heating pressurization unit heats and pressurizes the sheet of the maximum size with a pressurization force profile having a minimum value in the longitudinal direction at a position in the third region or a position of an end portion of the second region adjacent to the third region.

In a case where a region of a heating pressurization unit in a longitudinal direction of the heating pressurization unit where the heating pressurization unit heats and pressurizes a sheet of a maximum size is a first region, and a region of the heating pressurization unit in the longitudinal direction where the heating pressurization unit heats and pressurizes a sheet of a minimum size is a second region, and a region of the heating pressurization unit inside the first region and outside the second region in the longitudinal direction is a third region, the heating pressurization unit heats and pressurizes the sheet of the maximum size with a pressurization force profile having a minimum value in the longitudinal direction at a position in the third region or a position of an end portion of the second region adjacent to the third region.

A sheet binding device includes a processing tray, a movable reference plate, a stapling portion, a movement portion, a slide member, and a slide spring. When the stapling portion in an inclined state is moved from a reference position to a stapling position, the movable reference plate moves from an initial position, and when orientation of the stapling portion is shifted from the inclined state to a parallel state, the movable reference plate returns to the initial position. When the orientation of the stapling portion is shifted from the parallel state to the inclined state while the stapling portion is moved from the stapling position to the reference position, the movable reference plate moves from the initial position, and the stapling-side engagement portion separates from the movable engagement member, thereby causing the movable reference plate to return to the initial position.

A sheet binding device includes a processing tray, a movable reference plate, a stapling portion, a movement portion, a slide member, and a slide spring. When the stapling portion in an inclined state is moved from a reference position to a stapling position, the movable reference plate moves from an initial position, and when orientation of the stapling portion is shifted from the inclined state to a parallel state, the movable reference plate returns to the initial position. When the orientation of the stapling portion is shifted from the parallel state to the inclined state while the stapling portion is moved from the stapling position to the reference position, the movable reference plate moves from the initial position, and the stapling-side engagement portion separates from the movable engagement member, thereby causing the movable reference plate to return to the initial position.

Provided is a heater that performs heat processing when a sheet bundle is stacked on a holding plate. A storage elastic modulus of a toner image by an adhesive toner formed on a sheet of interest closest to the heater in an N1-th sheet bundle second closest to the heater in a booklet is greater than a storage elastic modulus of a toner image by the adhesive toner formed on any sheet included in another sheet bundle located farther from the heater than the N1-th sheet bundle in the booklet.

Provided is a heater that performs heat processing when a sheet bundle is stacked on a holding plate. A storage elastic modulus of a toner image by an adhesive toner formed on a sheet of interest closest to the heater in an N1-th sheet bundle second closest to the heater in a booklet is greater than a storage elastic modulus of a toner image by the adhesive toner formed on any sheet included in another sheet bundle located farther from the heater than the N1-th sheet bundle in the booklet.

In a case where a region of a heating pressurization unit in a longitudinal direction of the heating pressurization unit where the heating pressurization unit heats and pressurizes a sheet of a maximum size is a first region, and a region of the heating pressurization unit in the longitudinal direction where the heating pressurization unit heats and pressurizes a sheet of a minimum size is a second region, and a region of the heating pressurization unit inside the first region and outside the second region in the longitudinal direction is a third region, the heating pressurization unit heats and pressurizes the sheet of the maximum size with a pressurization force profile having a minimum value in the longitudinal direction at a position in the third region or a position of an end portion of the second region adjacent to the third region.