The present application discloses a post-processing apparatus including a second tray which receives a sheet stack ejected from a first tray, a pushing mechanism including a pushing portion which pushes the sheet stack against the second tray, a motion detector which detects a motion of the pushing mechanism, and a controller including an ejection controller which controls an ejector. When the ejector ejects the sheet stack, the pushing mechanism moves the pushing portion in a first direction away from the second tray. When the ejector finishes ejection of the sheet stack, the pushing mechanism moves the pushing portion in a second direction which is opposite to the first direction. Unless the motion detector detects the motion of the pushing mechanism moving the pushing portion in the first direction when the ejector ejects the sheet stack, the ejection controller executes interruption control of stopping the ejection of the sheet stack.

According to an example, printed media stack alignment may include actuating a belt and a paddle to shift first and second sheets to a stopper position represented by register of the first and second sheets against a stopper. The stopper may be actuated to shift the first and second sheets to an eject position, where the eject position is intermediate to a sheet deposit position and the stopper position. The belt and the paddle may be actuated to shift the first sheet, the second sheet, and a third sheet received at the sheet deposit position to the stopper position. The stopper may be actuated to shift the first, second, and third sheets to the eject position. Further, an ejector may be actuated to eject a stack including the first, second, and third sheets from the eject position.

A post-processing apparatus includes a storing unit in which plural recording media are stored for performing post-processing, and a pushing member that latches onto and pushes trailing ends of the recording media stored in the storing unit toward an ejection port. When the number of the recording media stacked on the storing unit is small, the pushing member latches onto and pushes the trailing ends of the recording media at a position different from a position at which the pushing member latches onto and pushes the trailing ends of the recording media when the number of the recording media stacked on the storing unit is large.

Disclosed herein is a sheet processing apparatus comprising a sheet tray configured to hold a bundle composed of the sheets fed from conveyance rollers, a wait path configured to keep waiting following sheets upstream the conveyance rollers, an accumulating tray configured to hold a sheet bundle, delivery rollers configured to nip the sheet bundle mounted on the sheet tray and the following sheets, to set off from one another, and to deliver them to the accumulating tray, and to switch back the following sheets to the sheet tray, and a conveyance member configured to convey the following sheets from the sheet tray.

A post-processing apparatus includes a storing unit that stores plural recording media for performing post-processing, a pushing member that pushes trailing ends of the recording media stored in the storing unit toward an ejection port, and a controller that controls the pushing member to stop at a position at which the pushing member supports a recording medium that is transported.

A separating element operates a transport device, which is configured to pile a plurality of partial book blocks for forming a book block along a book channel associated with the transport device, the finished piled book block being feedible to a processing machine. The book channel includes at least one transfer portion. At least one first separating element is arranged within the transport device as a link between an upstream transfer portion and a downstream transfer portion. The first separating element is configured to be operated by at least one drive and is configured to: receive a partial book block fed horizontally from the upstream transfer portion, horizontally transport the partial book block onward via the conveying portion formed by the first separating element, and then horizontally hand the partial book block over to the downstream transfer portion in keeping with a cycle.

A post-processing apparatus for an image forming apparatus includes a processing tray on which a sheet bundle is placed for discharging onto a discharge tray, a detector configured to detect presence or absence of the sheet bundle on the processing tray, and a controller. The controller is configured to control driving of the processing tray to discharge the sheet bundle onto the discharge tray and to determine whether or not to output an error if a detection result of the detector after the processing tray has been driven to discharge the sheet bundle onto the discharge tray indicates presence of the sheet bundle. The controller outputs the error if the sheet bundle is not a last sheet bundle of a post-processing job and does not output the error if the sheet bundle is the last sheet bundle of the post-processing job.

The present application discloses a post-processing apparatus including a second tray which receives a sheet stack ejected from a first tray, a pushing mechanism including a pushing portion which pushes the sheet stack against the second tray, a motion detector which detects a motion of the pushing mechanism, and a controller including an ejection controller which controls an ejector. When the ejector ejects the sheet stack, the pushing mechanism moves the pushing portion in a first direction away from the second tray. When the ejector finishes ejection of the sheet stack, the pushing mechanism moves the pushing portion in a second direction which is opposite to the first direction. Unless the motion detector detects the motion of the pushing mechanism moving the pushing portion in the first direction when the ejector ejects the sheet stack, the ejection controller executes interruption control of stopping the ejection of the sheet stack.

A collection system for collecting flat objects, including a plurality of collection trays disposed one on top of the other, each of the collection trays having an entrance and an exit; a feeder unit for feeding individual objects or assembled groups of objects to the entrance of the collection trays and for depositing the supplied objects in the respective collection tray, the feeder unit and collection trays being movable or swivelable relative to one another; a conveyor unit for removing the objects deposited in a collection tray through the exit of the respective collection tray; and a movable retaining element, which closes the entrance of one of the collection trays after an individual object or an assembled group of objects has been deposited in the respective collection tray. All of the objects collected in the collection trays are simultaneously removed from the collection trays by a conveyor unit and stacked.

Conveying belts 1A and 1B have stopping members 6A and 6B. After a sheet bundle is placed on a placement area of the conveying belts, a driving control part controls a guide driving part 4 so that a regulating guide 2 sandwiches the sheet bundle from both sides in the width direction, controls a belt driving part 3 so that the stopping member 6B is made to abut on a first end surface of the sheet bundle and a second end surface is made to abut on the stopping member 1A, and thereafter, controls the driving parts 3 and 4 so that the sheet bundle is conveyed along the regulating guide 2 in a state of being sandwiched from the front and the back by the stopping members 6A and 6B.