An orientation correcting device includes a first transporting unit that nips and transports a sheet; a detecting unit that detects a tilt of the sheet that is transported by the first transporting unit; a second transporting unit that nips and transports the sheet that has been transported by the first transporting unit; a flexure forming unit that, with the second transporting unit stopped, forms a flexure in the sheet as a result of causing the sheet that is transported by the first transporting unit to strike against the second transporting unit; and a moving unit that, with the second transporting unit stopped and the flexure formed in the sheet by the flexure forming unit, moves the second transporting unit in a crossing direction that crosses a transport direction of the sheet in accordance with an amount and a direction of the sheet tilt detected by the detecting unit.

A medium stacker includes a stacking portion, a rotary portion, a medium holder, a medium mover, and circuitry. The stacking portion has a stacking face to stack a sheet medium on which an image is formed. The rotary portion is configured to hold a leading end of the sheet medium in a sheet conveyance direction, reverse the sheet medium on the stacking face of the stacking portion, and convey the sheet medium. The medium holder is configured to hold the sheet medium when the sheet medium is conveyed by the rotary portion. The medium mover is configured to move the sheet medium to a predetermined position in a direction orthogonal to the sheet conveyance direction of the sheet medium while the sheet medium is held by the rotary portion. The circuitry is configured to control the rotary portion and the medium mover.

A printer includes a printer body including an installation area where a recording medium is installed, a print head that prints information on the recording medium, a controller, a movable guide that guides the side of the recording medium in the installation area, and a first switch that detects a position of the movable guide attached to the installation area. The controller performs a print control process corresponding to the width of the recording medium based on information obtained by the first switch.

A medium stacker includes a stacking portion, a rotary portion, a medium holder, a medium mover, and circuitry. The stacking portion has a stacking face to stack a sheet medium on which an image is formed. The rotary portion is configured to hold a leading end of the sheet medium in a sheet conveyance direction, reverse the sheet medium on the stacking face of the stacking portion, and convey the sheet medium. The medium holder is configured to hold the sheet medium when the sheet medium is conveyed by the rotary portion. The medium mover is configured to move the sheet medium to a predetermined position in a direction orthogonal to the sheet conveyance direction of the sheet medium while the sheet medium is held by the rotary portion. The circuitry is configured to control the rotary portion and the medium mover.

A page registration system may include, in an example, a media edge sensor to detect a location of an edge of a print media along a media feed path and in a direction non-parallel to the media feed path and a calibration sensor downstream of the media edge sensor to detect changes in the location of the edge of the print media in the direction non-parallel to the media feed path, and provide calibration data to the page registration system to correct changes in the location of the edge of the print media in the direction non-parallel to the media feed path.

A printer includes a printer body including an installation area where a recording medium is installed, a print head that prints information on the recording medium, a controller, a movable guide that guides the side of the recording medium in the installation area, and a first switch that detects a position of the movable guide attached to the installation area. The controller performs a print control process corresponding to the width of the recording medium based on information obtained by the first switch.

According to an embodiment, a sheet conveying apparatus includes a roller conveying mechanism, a sheet conveying sensor, an aligning mechanism, and a conveying controller. The conveying controller causes the paper feed roller of the roller conveying mechanism to be driven to convey the sheet. Furthermore, the conveying controller causes the adjustment roller of the aligning mechanism to be driven on the basis of a detection output of the sheet conveying sensor such that a deviation between the course of the sheet and a predetermined standard course is corrected.

A page registration system may include, in an example, a media edge sensor to detect a location of an edge of a print media along a media feed path and in a direction non-parallel to the media feed path and a calibration sensor downstream of the media edge sensor to detect changes in the location of the edge of the print media in the direction non-parallel to the media feed path, and provide calibration data to the page registration system to correct changes in the location of the edge of the print media in the direction non-parallel to the media feed path.

A sheet processing apparatus includes an aligning member and a shift conveying unit. The aligning member is movable in a width direction perpendicular to a sheet conveying direction and presses a sheet stack loaded on a sheet processing tray so as to align the sheet stack in the width direction. The unit is provided on the upstream side of the tray and conveys a sheet, shifting the sheet in the width direction. Being shifted by the unit, sheets are loaded at first and second loading positions on the tray. When sheets are loaded at the first loading position, the aligning member is moved to a first standby position corresponding to the first loading position in advance. When sheets are loaded at the second loading position, the aligning member is moved in advance to a second standby position corresponding to the second loading position.

A conveyor includes: a first guide plate including: a first roller shaft; and a first roller having a first hardness and attached to the first roller shaft; and a second guide plate disposed opposite to the first guide plate and including: a second roller shaft; a second roller having a second hardness higher than the first hardness of the first roller and attached to the second roller shaft, wherein parallelism between the first roller shaft and the second roller shaft is variable, and the first guide plate and the second guide plate guide the target, and the first roller and the second roller nips and conveys the target in a conveyance direction.