A sheet feeding device includes a feeding portion, a first feeding roller pair, a registration roller pair forming a nip portion and correcting oblique movement of the sheet, a sheet feeding passage between the first feeding roller pair and the registration roller pair, a revering portion provided downstream of the registration roller pair and a second feeding roller pair feeding the reversed sheet to the registration roller pair. The second roller pair includes a driven roller movable in a sheet width direction. The nip portion of the first feeding roller pair is in a spaced state when the sheet is fed by the registration roller pair, and a nip portion of the second feeding roller pair is not in the spaced state and the driven roller moves in the sheet width direction when the sheet is fed by the registration roller pair and the second feeding roller pair.

An image forming apparatus and roller separation device are provided. The image forming apparatus including a main body having a print unit, a first paper feeding unit containing print paper and insertable in or pullable from the main body, a feed roller in the main body feeding the print paper from the first paper feeding unit to the print unit and comprising a driven roller contacting a driving roller, an elastic member applying an elastic force to the driven roller in a direction to contact the driving roller, a handle member in the main body movable to a first position and a second position, and a separation member connected to the handle member and switched to a normal position separated from the driven roller and a separation position separating the driven roller from the driving roller.

An image forming apparatus and roller separation device are provided. The image forming apparatus including a main body having a print unit, a first paper feeding unit containing print paper and insertable in or pullable from the main body, a feed roller in the main body feeding the print paper from the first paper feeding unit to the print unit and comprising a driven roller contacting a driving roller, an elastic member applying an elastic force to the driven roller in a direction to contact the driving roller, a handle member in the main body movable to a first position and a second position, and a separation member connected to the handle member and switched to a normal position separated from the driven roller and a separation position separating the driven roller from the driving roller.

A medium transport method, which is performed by a medium transport device having a transport unit which includes rollers that can pinch a medium and which transports the medium, includes inserting the medium to a predetermined position, pressing a side end portion of the medium against a side surface guide, and pinching the medium with the rollers, and transports the medium.

There is provided a conveyance unit including a conveyance roller; a nip member movable between a contact position and a separation position; a tray movable between an installation position and a pull-out position; and a lever. The lever is configured to have a first state, a second state and a third state. The lever in the first state can make contact with the tray moving between the installation position and the pull-out position. The lever pivots from the first state to the second state when the tray moves from the installation position to the pull-out position, and the lever pivots from the first state to the third state when the tray moves from the pull-out position to the installation position. The conveyance unit further includes an interlocking mechanism.

Meandering of a medium at a time of transporting is reduced. A recording apparatus which transports medium, and performs recording on the medium, the apparatus includes a recording unit; a medium clamping unit which is provided on a side further upstream than the recording unit in a transport direction, and clamps the medium therebetween; and a medium support unit which is provided on the side further upstream than the medium clamping unit in the transport direction, and supports the medium, in which the medium is slackened between the medium clamping unit and the medium support unit.

According to one embodiment, a sheet feed device includes a first roller, a second roller, a torque limiter, a holder, and a driving unit. The first roller conveys a sheet in a first direction while being in contact with a first surface of the sheet. The second roller faces the first roller and is in contact with a second surface which is a back side of the first surface of the sheet in a state of sandwiching the sheet between the second roller and the first roller. The torque limiter imparts an anti-torque to the second roller in order to generate a force on the second surface in a direction opposite to the first direction. The holder rotatably supports the second roller. The driving unit moves the holder and biases the holder toward the first roller.

A sheet feeding device includes a feeding roller pair, a detecting portion, a first changing portion, a second changing portion, and a controller for controlling the first changing portion and the second changing portion. The controller starts a first feeding operation for feeding a sheet toward the obliquely feeding roller pair in a nipping state of the feeding roller pair and then starts a second feeding operation for feeding the sheet for abutting a side end of the sheet against the reference member in the nipping state of the obliquely feeding roller pair. The controller changes, after the first feeding operation is started and before the second feeding operation is started, a start timing of the second feeding operation on the basis of a detection result of a position of the side end of the sheet detected by the detecting portion.

A contact-separation mechanism includes a cam to rotate to move a contact-separation member to and from a counterpart member, a detection target to rotate together with the cam, and a detector to detect presence or absence of the detection target in a detection area of the detector, and circuitry. The cam has a reference range. The circuitry issues a rotation stop instruction of the cam after a target time elapses from passing of the reference range of the detection target through the detection area, and sets the target time based on a duration of an immediately preceding passing of the reference range through the detection area.

A sheet conveying device includes a correcting unit. The correcting unit corrects displacement of a sheet conveyed from an upstream side conveying path, and conveys the sheet to a downstream side conveying path. The correcting unit includes a first conveying part conveying the sheet, a first moving part moving a first frame supporting the first conveying part and a detecting part detecting a side end edge of the sheet at a reference position without displacement. The first conveying part stops conveyance of the sheet when a leading end of the sheet reaches the detecting part. While the driving of the first conveying part is stopped, the first moving part moves the first frame to move the sheet, and stops movement of the first frame, when detection result of the detecting part is changed, to position the side end edge to the reference position to correct displacement of the sheet.