An image forming apparatus includes, an image forming portion configured to form a toner image on a sheet using printing toner and apply powder adhesive on the sheet, a fixing portion configured to heat the toner image formed on the sheet and the powder adhesive applied on the sheet by the image forming portion and fix the toner image and the powder adhesive to the sheet, and a bonding portion configured to bond the sheet with the powder adhesive by reheating the sheet having been heated by the fixing portion. The bonding portion is arranged above the image forming portion.

A binding device includes a pressing member that has a first tooth, which forms unevenness in a recording material bundle, and a second tooth, which is paired with the first tooth and forms unevenness in the recording material bundle, and presses the recording material bundle with the recording material bundle sandwiched between the first tooth and the second tooth and a control unit that performs control such that pressing is released after a timing when a load on the pressing member decreases from start of pressing of the recording material bundle by the pressing member.

A stapling apparatus includes a stapler, a driver to move the stapler, and a guide part to define a moving path along which the stapler is to move in response to selection of the moving path among a plurality of moving paths along which the stapler is movable.

In a stapling device, a first guide member and a second guide member are disposed one by one on both sides of a binding portion of the recording medium on a side of a recording medium placing of a placement table such that each of the guide members is rotatable, and the first guide member and the second guide member are rotatable between a first posture along a first direction in which one abutting end side extends and a second posture inclined with respect to the first direction in line symmetry with respect to an imaginary line that passes through the binding portion along a second direction orthogonal to the first direction.

A sheet binding device includes a sheet shifting unit, a tape cutter, and a tape attachment unit. The sheet shifting unit has a guide and is configured to stack multiple sheets on the guide with edge portions that are shifted from each other to form a sheet bundle. The tape cutter cuts tape with a target length that is varied in accordance with a thickness of the sheet bundle. The tape attachment unit is configured to attach the cut tape having the target length to an edge portion of the sheet bundle.

A sheet processing apparatus includes a conveyance unit configured to convey a sheet, a stacking portion on which the sheet conveyed by the conveyance unit is stacked, a first regulation member configured to regulate a position of an edge portion, in a conveyance direction, of the sheet stacked on the stacking portion, a second regulation member configured to regulate a position of an edge portion, in a width direction orthogonal to the conveyance direction, of the sheet stacked on the stacking portion, a binding unit supported movably in the conveyance direction and configured to perform a binding process of binding the sheet stacked on the stacking portion, and a moving unit configured to move the second regulation member in the conveyance direction accompanied with a movement, in the conveyance direction, of the binding unit.

A sheet processing apparatus for processing a sheet includes a conveying path in which a sheet is conveyed; a setting portion including an opening formed in a cover, a setting face supporting a lower face of a sheet bundle inserted through the opening from an outside of the sheet processing apparatus, and a regulating face which regulates a position of the sheet bundle; a stack portion on which sheets are stacked; a binding unit which is configured to bind a sheet bundle set on a sheet setting area; and a punching unit being configured to be movable in the sheet width direction, the punching unit including a punching portion which forms a punch hole. In the sheet width direction, the sheet setting area is arranged as being overlapped with a moving area of an end of the one side of the punching unit in the sheet width direction.

A sheet binding apparatus includes a sheet conveyer, a tape holder, and first and second rollers. The sheet conveyer is configured to convey a sheet bundle with a leading end shifted, the sheet bundle having opposing first and second surfaces. The tape holder is configured to hold a tape at a position to which the leading end reaches such that the tape adheres to the leading end. The leading end with the tape passes and is pressed between the first and second rollers. The second roller is positioned upstream in the sheet forward direction from the first roller and to face the second surface of the sheet bundle. An angle between a line perpendicular to the sheet forward direction and a line passing rotational axes of the first and second rollers is greater than 0 and less than 90.

According to one embodiment, a sheet binding device includes a first mounting part, a second mounting part, and a mounting adjustment part. The first mounting part mounts a tape on an edge part of a sheet bundle. The second mounting part is opposite to the first mounting part in a sheet bundle thickness direction. The mounting adjustment part is capable of adjusting a mounting gap between the first mounting part and the second mounting part based upon a thickness of the sheet bundle. The mounting gap is equal to or smaller than the thickness of the sheet bundle before the sheet bundle is inserted between the first mounting part and the second mounting part.

According to one embodiment, a sheet binding apparatus includes a first roller, a second roller, and a nip-pressure adjusting section. The first roller attaches a tape to an edge portion of a sheet bundle. The second roller is opposed to the first roller in the sheet bundle thickness direction. The nip-pressure adjusting section is capable of adjusting, on the basis of the position of an edge portion leading end of the sheet bundle, a pressing force of a nip formed by the first roller and the second roller. Before the sheet bundle is inserted between the first roller and the second roller, an interval between the first roller and the second roller is equal to or smaller than the thickness of the sheet bundle.