An image forming system includes a conveyance processing portion, a setting processing portion, an insertion processing portion, and an operation control portion. The conveyance processing portion executes a conveyance process to convey a plurality of sheets placed on a sheet placing portion, sequentially to a sheet stack portion. When the insertion timing to insert the insertion sheet comes during an execution of the conveyance process, the insertion processing portion executes an insertion process to convey a sheet from the sheet supply source of the insertion sheet to the sheet stack portion. The operation control portion is configured to control operations of an image forming apparatus during execution of a sheet bundle output process based on the sheet type of the insertion sheet conveyed in the insertion process that is included in the sheet bundle output process, the sheet bundle output process including the conveyance process and the insertion process.

An image forming apparatus is to supply paper sheets on which images are formed to a post-processing apparatus to pressure-bind binding areas of paper sheets bundled. The image forming apparatus includes a conveyor, an image forming device, and a controller. The conveyor conveys a paper sheet. The image forming device discharges liquid ink to the paper sheet conveyed by the conveyor. The controller repeatedly executes a process of: causing the conveyor to convey the paper sheet to a position facing the image forming device; causing the image forming device to discharge the liquid ink to form an image on the paper sheet; and causing the conveyor to convey the paper sheet on which the image has been formed toward the post-processing apparatus. The controller further causes the image forming device to apply the liquid ink to a binding area of at least one of the paper sheets.

A post-processing apparatus for post-processing paper discharged from an image forming apparatus comprises: a paper discharging roller for conveying both first and second paper sequentially discharged from an image forming apparatus to an intermediate loading part; a main paddle part for conveying the first and second paper loaded on the intermediate loading part to a compiling region; a reverse roller for conveying, together with the main paddle part, the first and second paper to the compiling region; and a binding part for processing the first and second paper conveyed to the compiling region, the paper discharging roller allows the first paper to stand by on a standby path, and conveys the first and second paper to the intermediate loading part in a state in which the leading end of the first paper protrudes further than the leading end of the second paper.

A sheet processing apparatus that can suppress a reduction in a quality of a finish of a fold part of a stack of center-folded sheets without losing an ease of center-folding. The sheet processing apparatus comprises a creasing unit for forming a folding stripe on a sheet so as to facilitate folding the sheet, and an acquisition unit for acquiring information related to a thickness of the sheet. One or more sheets to be provided with folding stripes are determined, from among a plurality of sheets to be folded, according to the information related to the thickness of the sheets, and each of the determined one or more sheets are provided with a folding stripe.

A post-processing apparatus includes a binding device, a closing device, a driver, and a changeover switch. The binding device binds a sheet bundle. The closing device closes an entrance to a binding position at which the binding device binds the sheet bundle. The driver moves the closing device to a closing position to close the entrance. The switch performs switching to implement a state in which the binding device is able to bind the sheet bundle when the closing device moves to the closing position. The closing device includes an avoidance operation portion to move to the closing position to operate the switch, and a drive coupler coupled to the avoidance operation portion to move the avoidance operation portion to the closing position. A coupling state between the avoidance operation portion and the drive coupler is released when movement of the avoidance operation portion to the closing position is prevented.

A sheet processing apparatus includes a discharge unit, a loading unit, an abutting unit, a support unit, and a control unit. The discharge unit discharges, from a discharge port, a sheet bundle transported along a transport path. The loading unit is loaded by the sheet bundle being discharged onto the loading unit. The abutting unit is disposed forward from the discharge port in a discharge direction of the sheet bundle so that the abutting unit abuts with a top surface of the discharged sheet bundle. The support unit is protrusible from and retractable into the discharge port and protrudes to an underside of the sheet bundle temporarily to support the sheet bundle when the sheet bundle is discharged. The control unit controls movement of the support unit such that the support unit reaches a position of the abutting unit after the sheet bundle abuts with the abutting unit.

A post-processing apparatus includes a binding device, a closing device, a driver, and a changeover switch. The binding device binds a sheet bundle. The closing device closes an entrance to a binding position at which the binding device binds the sheet bundle. The driver moves the closing device to a closing position to close the entrance. The switch performs switching to implement a state in which the binding device is able to bind the sheet bundle when the closing device moves to the closing position. The closing device includes an avoidance operation portion to move to the closing position to operate the switch, and a drive coupler coupled to the avoidance operation portion to move the avoidance operation portion to the closing position. A coupling state between the avoidance operation portion and the drive coupler is released when movement of the avoidance operation portion to the closing position is prevented.

A sheet processing apparatus includes a stapler, a translating actuator, a rotating actuator, and a controller. The stapler is configured to bind a plurality of sheets together. The translating actuator is configured to translate the stapler. The rotating actuator is coupled to the translating actuator and configured to rotate the stapler. The controller is configured to (a) receive an instruction input, (b) determine a target position and a target angle of the stapler based on the instruction input, (c) control the translating actuator to move the stapler to the target position, (d) control the rotating actuator to rotate the stapler to the target angle, and (e) control the stapler to bind the plurality of sheets together while the stapler is at the target position and the target angle.

A post-processing device includes a discharge port through which a sheet is discharged, an intermediate tray, a discharge tray and an air sending part. The air sending part includes an upper air sending member, an upper switching member, a lower air sending member, a lower switching member and a controller. The upper air sending member generates a downward air flow from above the discharge port. The upper switching member is distributable the air flow generated by the upper air sending member to above the intermediate tray and to above the discharge tray. The lower air sending member generates an upward air flow from below the discharge port. The lower switching member is distributable the air flow generated by the lower air sending member to below the intermediate tray and to above the discharge tray. The controller controls the upper switching member and the lower switching member.

An image forming system includes a conveyance processing portion, a setting processing portion, an insertion processing portion, and an operation control portion. The conveyance processing portion executes a conveyance process to convey a plurality of sheets placed on a sheet placing portion, sequentially to a sheet stack portion. When the insertion timing to insert the insertion sheet comes during an execution of the conveyance process, the insertion processing portion executes an insertion process to convey a sheet from the sheet supply source of the insertion sheet to the sheet stack portion. The operation control portion is configured to control operations of an image forming apparatus during execution of a sheet bundle output process based on the sheet type of the insertion sheet conveyed in the insertion process that is included in the sheet bundle output process, the sheet bundle output process including the conveyance process and the insertion process.