A medium processing apparatus includes a liquid applier and a post-processing device. The liquid applier applies liquid onto a medium. The post-processing device performs a process on a media bundle including the medium with the liquid applied by the liquid applier. The liquid applier includes a liquid application member, a liquid storage, a movement mechanism, and a compression support. The liquid application member has an end portion to contact with the medium to apply the liquid onto the medium. The liquid storage stores the liquid to be supplied to the liquid application member. The movement mechanism moves the liquid application member toward or away from the medium to bring the end portion into contact with the medium or separate the end portion from the medium as an approaching operation. The compression support compresses the liquid application member according to the approaching operation of the movement mechanism.

An image forming apparatus includes an image forming unit configured to form an image including an adhesive image by powder adhesive on a sheet that is conveyed; a bonding unit, to which sheets on which the image has been formed by the image forming unit are conveyed in order, configured to, by heating a plurality of sheets conveyed to and stacked in the bonding unit, bond the plurality of sheets, using adhesive images formed on the plurality of sheets; and a control unit configured to evaluate a temperature of the plurality of sheets conveyed to the bonding unit and, based on the evaluated temperature, control an amount of heat to be applied to the plurality of sheets by the bonding unit heating the plurality of sheets.

An image forming apparatus accepts a selection of a first mode for forming a toner image for adhering foil onto a sheet via the toner image and an input of information relating to post-processing. The apparatus forms the toner image on the sheet. The apparatus displays a warning on a display according to the information relating to the post-processing, when the first mode is selected by the input unit.

A booklet forming device includes a sheet support portion, and a bonding unit including a pressurizing member and configured to form a bonding layer. In a case of forming a first booklet including a first number of sheets, the bonding unit is operated under a first operation condition so that a thickness of the bonding layer positioned closest to the pressurizing member in the first booklet becomes a first thickness. In a case of forming a second booklet including a second number of sheets more than the first number of sheets, the bonding unit is operated under a second operation condition different from the first operation condition so that the thickness of the bonding layer positioned closest to the pressurizing member in the second booklet becomes a second thickness larger than the first thickness.

An image forming apparatus comprises a rotationally driven photosensitive body, a charging device that charges a surface of the photosensitive body, an exposure light source that forms an electrostatic latent image by exposing the surface of the photosensitive body to light, a developing device that forms a toner image by developing the electrostatic latent image using toner, a transfer member that transfers the toner image to a sheet, a first memory that stores a cumulative image formation amount for each one of N exposure regions, and a control circuit that controls the exposure light source.

A booklet creating apparatus includes a heating-and-pressing unit and a controller. The heating-and-pressing unit heats and presses adhesive layer in a state in which plural sheets, with the adhesive layer formed thereon, are stacked. The controller performs control in such a way as to make a predetermined temperature and/or pressure lower when heating and pressing sheets of minimum size than when heating and pressing sheets of maximum size.

An image forming apparatus at least comprising: first image forming means for forming a first adhesive layer of a first toner on a sheet; and second image forming means for forming a second adhesive layer of a second toner on the first adhesive layer, adhesive image patterns are formed from the first and the second adhesive layer, the image forming apparatus further comprising specific booklet bonding means, wherein at least both the first and the second adhesive layer are formed on one of a first sheet and a second sheet that face each other in the sheet bundle, at least the first adhesive layer is formed on the other of the first sheet and the second sheet, and G1>G2 is satisfied, where G1 denotes a storage elastic modulus of the first toner, and G2 denotes a storage elastic modulus of the second toner.

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.

A method for controlling an image forming apparatus includes performing image formation on a sheet using a recording material, executing sheet processing for binding a plurality of sheets using the recording material, and storing a history of the image formation and a history of the sheet processing.