A sheet storage device includes a sheet storage unit to store sheets, a regulating unit in the sheet storage unit, and a lifting unit. The regulating unit regulates a position of a rear edge portion of the sheets in a sheet conveyance direction and includes a supporting portion, an urging member, and a pressing portion having a pressing surface in which a position to be in contact with lower sheets is a pressing surface lower portion, and a position to be in contact with upper sheets located higher than the lower sheets is a pressing surface upper portion. The pressing surface can be in a first state, where the pressing surface upper portion is located downstream from the pressing surface lower portion in a pressing direction, or in a second state, where the pressing surface lower portion is located downstream from the pressing surface upper portion in the pressing direction.

A paper feed device having regulation plates that are movable on a paper feed tray for loading paper and regulate edges of the paper, includes: a driver that moves the regulation plates; and a hardware processor that acquires paper information corresponding to a characteristic of the loaded paper, and causes the driver to move the regulation plates according to the acquired paper information.

A sheet transport device includes a sheet storage unit that stores a sheet and that is disposed in a housing having a bottom plate such that a gap is provided between the sheet storage unit and the bottom plate, the gap extending horizontally; a sheet transport unit that feeds the sheet from the sheet storage unit and transports the fed sheet along a transport passage including a reversing transport path along which the sheet is transported downward and then upward to reverse the sheet front to back, the reversing transport path extending vertically and being connected to the gap; and a first gate unit that prevents passage of the sheet that has entered the reversing transport path when the sheet free falls and allows passage of the sheet when the sheet receives a sheet transport driving force from the sheet transport unit.

A controller drives a floating unit and a conveyor to perform a sheet feed operation, during the sheet feed operation, acquires an amount of received light at a detector during floating of sheets floated by the floating unit each time each sheet is conveyed by the conveyor, and perform a following control of lifting a stacking tray upon the acquired amount of received light being less than a threshold value. The controller, after start of the sheet feed operation, samples amounts of received light at the detector during floating of the sheets floated by the floating unit, performs a threshold value determination process of determining the threshold value by using the sampled amounts of received light, and starts the following control upon determining the threshold value.

A feeder includes: a mount board that moves vertically while allowing sheet-shaped media to be stacked thereon; a transport device that allows an uppermost one of the sheet-shaped media stacked on the mount board to be sucked by a suction portion to transport the uppermost sheet-shaped medium to a transporter and to feed the uppermost sheet-shaped medium to a destination; left and right edge air blowers that blow air to left and right edge portions, when viewed from an upstream side in a transportation direction, of upper ones of the sheet-shaped media stacked; and left and right detectors that are disposed on left and right sides of the suction portion at the same position in the transportation direction, and that individually detect downward or upward bend amounts of left and right edge portions of the uppermost sheet-shaped medium.

A first conveying unit is allowed to be in contact with a print medium loaded on an uppermost portion of the one or more print media loaded on a print medium loading unit to convey the print medium from the uppermost portion. The first moving unit moves at least one of the one or more print media and the first conveying unit in each of directions in which the uppermost portion and the first conveying unit are close to each other and directions in which the uppermost portion and the first conveying unit are far away from each other.

An example paper cassette includes a cassette portion; a sliding portion to slide relative to the cassette portion to adjust a length of the paper cassette, the sliding portion initially being in a shipping position defining a shipping length of the paper cassette and deployable to different deployment positions at which the paper cassette is longer than the shipping length; and a length selection mechanism to: mechanically select one deployment position of the different deployment positions, while the sliding portion is in the shipping position; lock the sliding portion at the one deployment position, relative to the cassette portion when the sliding portion first slides from the shipping position.

A cassette portion includes a side guide, an end guide, and a paper detection portion. The side guide is movable in X direction and controls a motion of a first end portion of paper. The end guide is provided to the side guide to be movable in Y direction, and restricts a motion of a second end portion of the paper. The paper detection portion detects the first restricting position in the X direction of the side guide and a second restricting position in the Y direction of the end guide in a restricted state of the paper. The end guide includes a detection target portion formed such that detection information to be detected by the paper detection portion varies in the Y direction. The paper detection portion detects the first restricting position and the second restricting position by obtaining detection information from the detection target portion.

There is provided a sheet storage device including a regulation unit that includes a first contact portion configured to contact a stacking unit, and a second contact portion configured to contact a facing member. The first contact portion contacts the stacking unit in a state of being urged toward the stacking unit. The second contact portion contacts the facing member in a state of being urged toward the facing member.

A sheet conveyance apparatus includes a sheet supporting tray to support a sheet, a sheet conveyance unit to convey the sheet supported on the sheet supporting tray, a first detection sensor to detect the supported sheet at a first detection position, and a second detection sensor to detect the supported sheet at a second detection position farther from a center of the sheet supporting tray in a sheet width direction than the first detection position. In addition, a control unit controls the sheet conveyance unit in a first mode in a case where the first and second detection sensors detect the sheet, and controls the sheet conveyance unit in a second mode in which a sheet conveyance speed is slower than that of the first mode in a case where the first detection sensor detects the sheet and the second detection sensor detects no sheet.