A media stapling system for an image forming device. The media stapling system comprises a stapler mounted on a motor-driven carriage assembly moveably coupled to a track having portions extending along at least two contiguous edges and included corner of a media stack to be stapled. The carriage assembly and track enables stapling in multiple positions along the long and/or short edges and corners of media of varying sizes positioned in a media support. The track is mounted on a planar frame positioned at an angle from horizontal, providing a relatively small footprint. A controller is in operable communication with the media stapling system and an user interface. The user interface provides a plurality of predetermined stapling patterns for selection with the controller controlling the media stapling system to staple the media stack using a selected one of the plurality of stapling patterns.

The second sheet discharge portion is provided above the first sheet discharge portion. The first and second sheet processing units are configured to process a sheet discharged from the first sheet discharge portion, and the second sheet processing unit is provided between the first sheet discharge portion and the first sheet processing unit. The first support portion is provided on the first sheet processing unit. The second support portion is disposed upstream of the first support portion in a sheet discharge direction of the second sheet discharge portion and on or above the second sheet processing unit and configured to support the sheet discharged from the second sheet discharge portion in collaboration with the first support portion.

According to an embodiment, a sheet folding apparatus comprises a first roller, a second roller configured to be energized to the first roller, form a nip section together with the first roller, fold a sheet in half together with the first roller through the nip section and convey the sheet folded in half together with the first roller and a pressing force adjusting mechanism configured to be capable of increasing and decreasing a pressing force generated at the nip section. The pressing force adjusting mechanism causes a pressing force in a state of being conveying the sheet folded in half to be lower than that in a state of being folding the sheet in half.

A post-processing apparatus of an embodiment includes a first tray configured to receive a sheet on which the post processing is not executed by a processing section, a second tray configured to temporarily place a sheet, an inlet roller configured to carry in a sheet discharged from an image forming apparatus into the post-processing apparatus, a first roller configured to convey the sheet to the first tray, a second roller configured to convey the sheet to the second tray, a detection sensor configured to detect whether or not there is sheet being conveyed in a sheet conveyance path from the inlet roller to the first or the second tray, and a roller control section configured to drive the first or the second roller if an image forming apparatus stops the discharge of the sheet that is being printed and the detection sensor detects the sheet.

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.

A sheet processing apparatus, including: a conveyance path in which a sheet is conveyed in a predetermined conveyance direction; a rotary member pair configured to nip the sheet conveyed in the conveyance path and rotate to perform folding processing on the sheet; and a guide portion provided between one rotary member of the rotary member pair and the conveyance path and configured to guide a downstream edge of a sheet conveyed in the predetermined conveyance direction, wherein, in case that a sheet is conveyed in the conveyance path in the predetermined conveyance direction, the guide portion guides a downstream edge of the sheet in the predetermined conveyance direction in a state in which the guide portion is held in contact with the one rotary member.

A sheet processing apparatus, including: a rotary member pair configured to nip a sheet conveyed in a conveyance path and rotate to fold the sheet; and a guide portion provided between one rotary member of the rotary member pair and the conveyance path, the one rotary member including: a first part; and a second part, wherein a first distance between the first part and a rotary shaft center of the one rotary member is greater than a second distance between the second part and the rotary shaft center, and wherein the guide portion is positioned at a first position in case that the second part is positioned at a first rotational position, and the guide portion is positioned at a second position different from the first position in a distance from the rotary shaft center in case that the second part is positioned at a second rotational position.

In accordance with an embodiment, a sheet glue binding processing apparatus comprises a processing tray, a glue binding section and a sheet detection section. The processing tray is used to stack a sheet in such a manner that the end of the binding margin side of the sheet is fed to a positioning section. The glue binding section is configured at the positioning section side of the processing tray to adhere glue material to the binding margin of the sheet already stacked on the processing tray. The sheet detection section detects whether or not the binding margin of the first sheet to be stacked on the processing tray is located at a specific position of the processing tray.

An image forming apparatus may comprise a first feeding unit, a second feeding unit, a feeding control unit, an image forming unit, a reversal unit, a post-processing unit, and a post-processing control unit. Based on a post-processing time amount notified from the post-processing control unit, the feeding control unit does not allow a sheet to wait in the reversal unit and adjusts a feed time of a sheet fed from the first feeding unit so that the sheet fed from the first feeding unit does not contact with a sheet waiting in the second feeding unit.

In a sheet-processing apparatus, a controller controls a conveying guide to change over a sheet-conveying path of sheets that are ejected without stapling them to a sheet-processing conveying path based on predetermined sheet-conveying path selection information when judging that a non-stapling mode in which the sheet stapling processing is not performed on a first type of sheets follows a stapling mode in which the sheet-stapling processing is performed on a second type of sheets. The first type of sheets, which are not to be stapled, conveyed on the sheet-processing conveying path waits on a waiting portion in the non-processing mode while in the processing mode, a sheet-processing portion performs the sheet processing on the second type of sheets.