An electric stapler includes a clamp part that is configured to include a first wall portion and a second wall portion for gripping a paper bundle, a penetration part that causes a staple to penetrate the paper bundle gripped by the clamp part, a clinch part that bends the staple penetrating the paper bundle to bind the paper bundle, a gripping release detection unit that detects that the paper bundle is released from gripping after the first wall portion moves in the direction of separating from the second wall portion from a state where the paper bundle is gripped by the clamp part; and an output unit that, after it is detected that the paper bundle is released from gripping of the clamp part, outputs a gripping release signal indicating that the paper bundle is released from gripping of the clamp part to an outside.

An example finisher includes a first portion extending in a vertical direction, a second portion including an entrance to receive paper as a finishing process target, and a finishing unit to perform a finishing process, the second portion extending from the first portion in a lateral direction, a stacker to receive paper discharged from the finishing unit and which extends in an opposite direction to the second portion based on the first portion, and an elevation driving unit provided on the first portion to elevate the stacker in a vertical direction.

A post-processing apparatus includes a first discharge section configured to discharge a medium having thereon information recorded by a recording section, a processing tray configured to be loaded with the medium discharged by the first discharge section, an edge alignment section disposed on the processing tray, a transport section making contact with an upper surface of the medium mounted on the processing tray and configured to transport the medium to the edge alignment section, a position change section configured to change a relative position of the transport section with respect to the processing tray, and a controller configured to change pressure of when the transport section presses the medium by controlling the position change section, and a post-processing section configured to perform post-processing on the medium on the processing tray, wherein the controller changes the pressure based on processing information regarding processing to be performed on the medium.

A post-processing apparatus includes a first discharge section configured to discharge a medium having thereon information recorded by a recording section, a processing tray configured to be loaded with the medium discharged by the first discharge section, an edge alignment section disposed on the processing tray, a transport section making contact with an upper surface of the medium mounted on the processing tray and configured to transport the medium to the edge alignment section, a position change section configured to change a relative position of the transport section with respect to the processing tray, and a controller configured to change pressure of when the transport section presses the medium by controlling the position change section, and a post-processing section configured to perform post-processing on the medium on the processing tray, wherein the controller changes the pressure based on processing information regarding processing to be performed on the medium.

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.

An example apparatus includes a media receiving portion having a leading edge receiving region and a trailing edge receiving region for receiving media traveling onto the media receiving portion in a direction from the trailing edge receiving portion the leading edge receiving portion. The example apparatus further includes a leading edge stop coupled to the media receiving portion at the leading edge receiving portion. The leading edge stop is resiliently coupled to the media receiving portion to bias against movement of the leading edge stop from a resting position.

A stapling apparatus including a holding portion that receives and holds a plurality of mediums, a first matching portion positioned downstream of the holding portion, a paddle that applies sending force to the mediums so that leading edge sides of the mediums reach the first matching portion, a stapler that binds the mediums, the leading edge sides of the mediums having been matched by the first matching portion, a folding mechanism portion that folds the mediums that have been bound by the stapler. In the stapling apparatus, the first matching portion is configured to move and is configured to transport the mediums to a performing position of the stapler and a performing position of the folding mechanism portion by moving, and a position where the paddle applies sending force to the mediums differs according to lengths of the mediums in a transport direction.

A stapling apparatus including a holding portion that receives and holds a plurality of mediums, a first matching portion positioned downstream of the holding portion, a paddle that applies sending force to the mediums so that leading edge sides of the mediums reach the first matching portion, a stapler that binds the mediums, the leading edge sides of the mediums having been matched by the first matching portion, a folding mechanism portion that folds the mediums that have been bound by the stapler. In the stapling apparatus, the first matching portion is configured to move and is configured to transport the mediums to a performing position of the stapler and a performing position of the folding mechanism portion by moving, and a position where the paddle applies sending force to the mediums differs according to lengths of the mediums in a transport direction.

A finisher assembly of a multifunction peripheral includes a vertically oriented stapler and a paper transport motor. When the paper transport motor rotates in the forward direction, printed pages from the print engine of the multifunction peripheral are received via a paper chute and a feed assist roller urges the printed pages into a vertical paper accumulation cache basin. Rotation of the paper transport motor also opens a biasing plate allowing the pages to freely enter the cache basin. Once all of the pages of the print job are in the cache basin, the paper transport motor rotates in the reverse direction causing the biasing plate to bias the printed pages, in the cache basin, against a registration surface of the vertically oriented stapler unit. The pages of the print job are stapled together the stapled print job is moved to the paper tray for collection by a user.

According to one embodiment, a post-processing apparatus includes a first sensor, a second sensor, and a control unit. The first sensor detects an object in a predetermined area in which a predetermined post-process is performed on a sheet conveyed from an image forming apparatus. The second sensor detects an object at a position closer to an opening in the area than the position of the first sensor with respect to the opening through which the sheet passes when the post-processed sheet is discharged from the area. When the second sensor detects an object before the first sensor detects the object, the control unit performs a predetermined process for preventing the occurrence of a failure.