A first transport path is put into a first state capable of transporting a paper sheet when a first portion and a second portion engage with each other, and put into a second state in which the second portion is swingable with respect to the first portion about a first swing axis extending in a direction orthogonal to a first direction and horizontal when engagement between the first portion and the second portion is released. A contact portion comes into contact with the second portion, thereby engaging the second portion with the first portion when a second unit in which the first transport path is in the second state is moved in a second direction opposite to the first direction.

There is provided a sheet feeding apparatus for feeding a sheet. The sheet feeding apparatus includes: a feeding roller that feeds a sheet; and a moving mechanism that moves the feeding roller to a feeding position where the feeding roller contacts the sheet, to a first retracting position where the feeding roller is separated from the sheet, and to a second retracting position lying between the feeding position and the first retracting position.

A pair of regulating guides can guide both end edges in a sheet width direction Y of a sheet being conveyed being nipped by a conveying belt and balls. The pair of regulating guides can move to their respective guide positions each for guiding one of both end edges of the sheet and their respective retracting positions each retracting from one of the both end edges of the sheet by a distance larger than the guide position. A guide moving unit for moving the pair of regulating guides makes each of the pair of regulating guides reach the guide position from the retracting position after the rear end of the sheet passed from a conveying roller pair positioned on the upstream side to the conveying belt passes the conveying roller pair.

To provide a configuration for allowing a user to easily take out a sheet stopped on a conveying belt. Regulating guides are disposed on both sides of a conveying belt in a sheet width direction Y and can guide both end edges in the sheet width direction of a sheet S being conveyed while being nipped by the conveying belt and the balls. A take-out port is provided on a side close to the regulating guide in the sheet width direction and serves as an opening for taking out the sheet stopped on the conveying belt. The regulating guide on a side away from the take-out port moves in the sheet width direction Y toward the take-out port when the sheet is stopped on the conveying belt.

A recording medium conveyance device includes a conveyance device cover, a pair of guides, a maintenance part, a removable cover. The conveyance device cover is openable and covers a conveyance passage of a recording medium. The pair of guides forms the conveyance passage and includes a cover side guide on the conveyance device cover and a body side guide separable from the cover side guide. The maintenance part is on at least one of the pair of guides. The removable cover is configured to form a part of the conveyance passage and cover the maintenance part.

An image forming apparatus, including a main chassis having a discharge tray and a switchback tray in an upper position with respect to the discharge tray; an image forming unit; a discharge roller to discharge a recording sheet conveyed through the image forming unit onto the discharge tray; a duplex conveyer to invert the sheet and convey the inverted sheet to return to the image forming unit; and a switchback roller being rotatable in a normal direction to convey the sheet toward the switchback tray and a reverse direction to convey the sheet to the duplex conveyer; is provided. The main chassis includes a pair of walls, each of which extends in a vertical direction and in a conveying direction of the sheet and is arranged in adjacent to the switchback tray such that the switchback tray is interposed between the pair of walls.

A medium transport device includes a transporting member, a medium offsetting member, a guide member, and an interlocking member. The guide member is located upstream of the transporting member in a medium transport direction. The guide member is movable between a first position, in which the guide member guides the medium toward the medium accommodating member, and a second position, in which the guide member guides the medium to a destination different from the medium accommodating member, to guide the medium. The interlocking member moves the guide member between the first position and the second position in conjunction with a movement of the medium offsetting member in a width direction of the medium offsetting member.

A printing apparatus includes a feeding roller, a conveyance roller, a first driving unit configured to drive the conveyance roller, a second driving unit configured to drive the feeding roller, a control unit configured to control the first and second driving units, a detection unit configured to detect an error related to the second driving unit, and a determination unit configured to determine, when the detection unit has detected the error related to the second driving unit, whether to continue the conveyance of a first print medium based on a leading edge position of a second print medium. In a case in which an error is detected by the detection unit, the control unit controls the conveyance of the first print medium by the conveyance roller based on a determination result of the determination unit.

A printing apparatus includes: a conveyor including a first pair of conveyance rollers and a second pair of conveyance rollers each configured to nip and convey a sheet; a first jam releaser configured to separate rollers of the first pair of conveyance rollers from each other; a second jam releaser configured to separate rollers of the second pair of conveyance rollers from each other; and a controller configured to control the conveyor. In stopping sheet conveyance by the conveyor upon occurrence of a failure, the controller controls the conveyor to prevent a sheet from being nipped only by the first pair of conveyance rollers prior to separation of the rollers of the first pair of conveyance rollers from each other by the first jam releaser.

An image forming system includes a detection unit to detect a recording material, having an image formed thereon by an image forming unit, placed on a processing tray, a staple unit, a discharge unit, and a discharge tray. A first mode of the system is to discharge the recording material conveyed from the image forming unit to the discharge tray via the processing tray and a second mode involves waiting for instruction for executing. When the detection unit detects the recording material inserted into the processing tray in the second mode, and a recording material first mode conveying instruction is issued in a state of waiting for the executing instruction after the recording material detection, a discharge operation is performed to discharge the recording material inserted into the processing tray to the discharge tray without the staple unit executing staple processing on the recording material inserted into the processing tray.