According to one embodiment, a sheet post-processing apparatus includes: a supporting member configured to support a trailing end portion in a conveying direction of a sheet; a plurality of paddles configured to rotate around a rotating shaft independently from the supporting member, nip and hold the trailing end portion of the sheet in conjunction with the supporting member from both sides in a thickness direction of the sheet, and nip and hold trailing end portions of following sheets, which are stacked on the sheet, one by one from the thickness direction of the trailing end portion, in the plurality of paddles, a length from the rotating shaft to a distal end of a paddle on a far side from the supporting member in a rotating direction being relatively larger than a length from the rotating shaft to a distal end of a paddle on a near side from the supporting member in the rotating direction; and an arm member configured to press a trailing end portion of an uppermost sheet in a stacking direction of the sheet and the at least one sheet toward the supporting member, and formed in a comb teeth shape that does not interfere with rotation tracks of the plurality of paddles while pressing the trailing end portion of the sheet toward the supporting member.

An image forming system according to an embodiment includes an image forming unit that forms an image on each of a plurality of recording media. A binding unit binds at least two of the recording media together at a binding position thereof to form a bundle. A discharge tray is configured to hold bundles formed by the binding unit. A control unit controls the binding unit and the image forming unit so that a first bundle and a subsequent second bundle are stacked on the discharge tray with the respective binding positions thereof in a first direction parallel to a transport direction of the recording media and a second direction perpendicular to the transport direction of the recording media.

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 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.

An image forming apparatus includes an image forming unit to form an image on a sheet, an intermediate processing tray where sheets conveyed through a first conveyance path are stacked as a sheet bundle, a sensor disposed at a second conveyance path to detect a conveyed sheet bundle, and a stacking tray in which sheets discharged through a discharging path diverging from the first conveyance path are stacked. In response to a sensor detected paper jam, a control unit determines the intermediate processing tray as the discharging destination for a sheet among the remaining sheets, and determines the stacking tray as the discharging destination for a sheet among the remaining sheets. After the paper jam is cleared, the control unit causes execution of bookbinding and cutting for a sheet bundle including the remaining sheets stacked in the intermediate processing tray.

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 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.

A sheet thermocompression apparatus for bonding a plurality of the sheets to one another, and configured to be compatible with the sheets with a plurality of prescribed sizes. The apparatus includes a loading portion to be loaded with the bundle of sheets each including the adhesion layer formed thereon and a thermocompression unit. The thermocompression unit includes (i) a pressing member pressing the bundle of sheets loaded on the loading portion in a loading direction of the sheets, a longitudinal direction of the pressing member is a direction along one edge of the sheets loaded on the loading portion, (ii) a heating source heating the pressing member, and (iii) a temperature measuring sensor arranged at a position not overlapping a minimum sheet with a minimum size of the prescribed sizes loaded on the loading portion in the loading direction, and detects a temperature of the heating source.

According to one embodiment, a sheet post-processing apparatus includes: a supporting member configured to support a trailing end portion in a conveying direction of a sheet; a plurality of paddles configured to rotate around a rotating shaft independently from the supporting member, nip and hold the trailing end portion of the sheet in conjunction with the supporting member from both sides in a thickness direction of the sheet, and nip and hold trailing end portions of following sheets, which are stacked on the sheet, one by one from the thickness direction of the trailing end portion, in the plurality of paddles, a length from the rotating shaft to a distal end of a paddle on a far side from the supporting member in a rotating direction being relatively larger than a length from the rotating shaft to a distal end of a paddle on a near side from the supporting member in the rotating direction; and an arm member configured to press a trailing end portion of an uppermost sheet in a stacking direction of the sheet and the at least one sheet toward the supporting member, and formed in a comb teeth shape that does not interfere with rotation tracks of the plurality of paddles while pressing the trailing end portion of the sheet toward the supporting member.

According to one embodiment, a sheet post-processing apparatus includes a supporting member and a plurality of paddles. The supporting member supports the trailing end portion in a conveying direction of a sheet. The plurality of paddles rotates around a rotating shaft independently from the supporting member. The plurality of paddles nip and hold the trailing end portion of the sheet in conjunction with the supporting member from both the sides in the thickness direction of the sheet. The plurality of paddles nip and hold the trailing end portions of the following sheets, which are stacked on the sheet, one by one from the thickness direction of the trailing end portion.