A sheet transport device includes a sheet transport path along which at least one sheet is transported to a nip defined by a fixing roller and a displacement roller, a sensing unit disposed on the sheet transport path, an opening and closing member that is movable between a closed position at which the sheet transport path is formed and an open position at which the sheet transport path is exposed, and a guide member that is attached to the opening and closing member and that moves by following displacement of the displacement roller in such a manner as to maintain a certain distance from the sensing unit.

A sensor unit includes a first housing constituting a first conveying face of a sheet conveying passage, a second housing constituting a second conveying face arranged opposite the first conveying face with a predetermined gap, an edge detection sensor detecting a side edge along the sheet conveying direction, and a gap adjuster supporting the first housing movably in a direction in which the size of the gap increases. When, with the first housing arranged at the first position, a sheet with a thickness greater than a reference value passes through the sheet conveying passage, the first housing moves in the direction in which the size of the gap increases as the sheet enters the sheet conveying passage, to allow the passage of the sheet.

A sheet feeding device and a printing apparatus capable of estimating a number of remaining sheets without error include a loading member on which sheets are loaded, a lift unit that moves the loading member up and down, a position detection unit that detects a lift-up position to which the loading member moves up, a sheet detection unit that detects that a sheet at an uppermost position of the sheets loaded on the loading member has moved up to a feeding position by an upward movement of the loading member, a feeding roller that feeds a sheet at the feeding position, and an estimation unit that estimates the number of remaining sheets loaded on the loading member based on a combination of detection results of the sheet detection unit and the position detection unit.

An image forming apparatus employing an electrophotographic image forming method includes a casing having a front wall to which an opening is formed and a rear wall facing the front wall, a photosensitive drum located close to the front wall, a support member configured to support the photosensitive drum. The support member is slidably movable between an accommodated position a drawn position at which the photosensitive drum is drawn out of the casing through the opening. The image forming apparatus further includes a sheet tray, a feeding roller configured to feed the plurality of sheets supported by the sheet tray, a first conveying guide arranged between the support member and the sheet tray to face the support member, and a second conveying guide formed to the support member at a position facing the first conveying guide to guide the sheet inserted through the opening.

An example system includes a main body and a module. The main body includes a first guide portion, and the module includes a second guide portion. The module is removably attachable to the main body. The first guide portion and the second guide portion form complimentary parts of a media guide when the module is attached to the main body.

An image recording apparatus includes: a recording unit configured to record an image on a sheet conveyed in a conveyance direction; conveyance rollers arranged downstream of the recording unit in the conveyance direction to be apart from each other in a width direction orthogonal to the conveyance direction; first spur rollers arranged opposingly to the conveyance rollers respectively and configured to nip the sheet between the conveyance rollers and the first spur rollers; second spur rollers arranged between the mutually adjoining first spur rollers respectively in the width direction; and a first guide member arranged upstream of the first spur rollers and the second spur rollers in the conveyance direction; and having a first guide surface configured to guide the sheet to a nip position at which the sheet is nipped by the conveyance rollers and the first spur rollers.

An image recording apparatus for recording an image on a sheet includes a recording section which records the image on the sheet in a transport passage for transporting the sheet in a transport direction and multiple plates which are spaced apart from each other in a widthwise direction. These multiple plates include a first type of plate and a second type of plate. Plates of a first type of plate are configured to overlap a sheet when viewed in a direction perpendicular to the transport direction and the widthwise direction, while plates of the second type of plate do not.

A sheet conveying apparatus includes a guide unit to guide a sheet conveyed by a sheet conveyance portion. The guide unit includes a first movable guide, a second movable guide, and a linking mechanism having an intermediate member through which the first and second movable guides are linked movably with respect to each other. A conveyance regulating portion is supported by the intermediate member and guides the sheet passing through a first conveyance path toward the sheet conveyance portion and guides the sheet that is switched back by the sheet conveyance portion toward a second conveyance path.

An apparatus for aligning at least one note of value along a transport path includes at least one transport element driven by at least one first drive unit and at least one counter-pressure element arranged opposite to the transport element. The transport path of the note of value extends between the transport element and the counter-pressure element. The counter-pressure element is ball-shaped and is mounted so as to be freely rotatable. Further, the apparatus includes a second drive unit for displacing the transport element along its axis of rotation so that a note of value arranged between the transport element and the counter-pressure element is moved transversely to the transport direction during displacement of the transport element.

A sheet feeder includes: a casing; a first roller; a pressing portion; a first spring; and a second spring. The pressing portion is movable between a first position and a second position via a third position. The pressing portion in the first position faces the first roller within a conveying region defined in the casing. The pressing portion in the second position is separated from the first roller farther than in the first position. The third position is located between the first position and the second position. The first roller is exposed to the conveying region. The first spring urges the pressing portion toward the first roller when the pressing portion is disposed between the first position and the second position. The second spring urges the pressing portion toward the first roller when the pressing portion is disposed between the second position and the third position.