A binding device includes a first pressing member that presses a recording-medium stack from one surface side of the recording-medium stack, a second pressing member disposed at a position opposed to the first pressing member to press the recording-medium stack from the other surface side of the recording-medium stack, and a reduction part provided in at least one pressing member of the first pressing member and the second pressing member to reduce creases in recording media of the recording-medium stack when an end portion of the at least one pressing member is pressed against the recording-medium stack.

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.

A medium processing apparatus includes a liquid applier, a post-processing device, and a controller that is circuitry. The liquid applier applies liquid on at least one medium. The post-processing device performs a combination of various types of post-processes including a liquid application crimp binding and a crimp binding and a various types of bindings including a dual binding, a parallel binding, and an oblique binding, on a bundle of media including the at least one medium for a number of times. The circuitry is to change the number of times of the post-process according to the combination of the various types of the post processes and the various types of bindings, to be performed.

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 medium processing apparatus includes a liquid applier and a post-processing device. The liquid applier includes a liquid application member including a foam containable a liquid to apply the liquid to a liquid application region in a part of at least one medium of a bundle of media. The post-processing device performs a given process on a post-processing region in the part of at least one medium having the liquid application region on which the liquid is applied by the liquid applier. The liquid applier applies the liquid to the liquid application region overlapped with at least a part of the post-processing region.

A stapler apparatus may be provided. More specifically, a stapler apparatus capable of automatically stapling a bundle of sheets output from an image forming apparatus such as a copy machine, a printer, a facsimile or the like may be provided. The stapler includes: a guide plate in which a slot having a branch structure has been formed; a moving frame which is reciprocatively movable on the guide plate; a rotation frame which is rotatable on the moving frame and includes a plurality of levers mounted thereon, the plurality of levers moving along the inside and outside of the slot or change paths; a path change member which changes a movement path of any one of the plurality of levers; and a stapler which is mounted on the rotation frame and is in conjunction with the rotation frame.

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 stapling apparatus capable of performing stapling on various positions by varying a moving path of a stapler is provided. The stapling apparatus includes a stapler, a driver configured to be coupled to the stapler and move the stapler, and a guide part configured to selectively switch a moving path of the stapler.

A sheet processing apparatus includes a first member having a first concavo-convex portion in which pluralities of concavities and convexities are provided, a second member having a second concavo-convex portion in which pluralities of concavities and convexities are provided and clamping a sheet bundle together with the first concavo-convex portion of the first member, and a supporting portion supporting at least one of the first and second members turnably centering on a turning center. The first concavo-convex portion is configured such that a distance between an end on the turning center side of one convex portion among the pluralities of concavities and convexities and the turning center is different from a distance between an end on the turning center side of another convex portion and the turning center.

The purpose of the present invention is to provide a post-processing apparatus capable of performing conveying to and storing at a predetermined stack tray without causing sheet jamming even when a sheet having larger size than a standard size is introduced. The present invention comprises a post-processing apparatus as a processing tray on which sheets conveyed in a predetermined conveyance direction are stacked into a bundle shape, an aligning device which aligns the sheets conveyed to the processing tray, a binding device which performs a binding process on the sheets aligned by the aligning device, and a controller which controls the aligning device so that a sheet is aligned at a position being apart from the binding device by a predetermined distance when the sheet conveyed to the processing tray has a predetermined size or larger.