There is provided a sheet conveyance device that includes a first conveyance roller and a second conveyance roller that are arranged at a position other than a center in a direction of sheet width in a sheet conveyance path, a roller selector that selects the first conveyance roller or the second conveyance roller as a roller to convey a sheet, and a controller that causes the roller selector to select the first conveyance roller or the second conveyance roller. The first conveyance roller is made of a material that causes a speed of the sheet conveyed by the first conveyance roller in contact with the first conveyance roller to be higher than a rotation speed of the first conveyance roller. The second conveyance roller is made of a material that causes a speed of the sheet conveyed by the second conveyance roller in contact with the second conveyance roller to be lower than a rotation speed of the second conveyance roller.

Alignment apparatuses include a frame and contact elements connected to the frame. The contact elements contact items that are to be transported in a processing direction relative to the frame. The contact elements are in permeant fixed positions relative to the frame, and do not move relative to the frame. Adjustable mounts are connected to the frame and move the frame in the processing direction and in a perpendicular cross-processing direction. A controller is electrically connected to the adjustable mounts, and the controller is adapted to control the adjustable mounts to simultaneously move the frame and all the contact elements in the cross-processing direction and the processing direction while rotating the frame. Methods laterally shift imaging on sheets that have had rotational correction performed by such alignment apparatuses.

An image forming apparatus includes a flag, a sensor, a loop controller, a detector, and an image controller. The flag is disposed between the first and second conveying units and moves when in contact with a recording material having a loop. A signal value output from the sensor varies per a flag position. The loop controller changes a recording material speed based on the signal value output. The detector detects the recording material or an image formed on the recording material and the image controller changes an image forming condition based on the detection. The detector includes first and second contacting members that move to nip the recording material. A position of the flag, for changing a signal value output from the sensor, is included in a range in which first and second contacting members are movable.

A medium conveyance device includes a guiding member that is movably supported on a frame, a pick roller that is rotatably supported on the guiding member and that rotates to feed a medium that is placed on a tray to a feed roller, and a joint unit that transmits a rotation force from a drive shaft to the pick roller.

A sheet transporting device includes: plural pairs of transporting rolls that are arranged adjacent to one another in a direction of transport of a sheet; and a component configured to switch individual positions of the plural pairs of transporting rolls between a nipping position and an unnipping position, the component being a single switching component capable of switching a state of nipping by the plural pairs of transporting rolls between a state where all of the plural pairs of transporting rolls are in the nipping position, a state where some of the plural pairs of transporting rolls are in the nipping position while remaining ones of the plural pairs of transporting rolls are in the unnipping position, and a state where all of the plural pairs of transporting rolls are in the unnipping position.

A sheet feeder includes an ejection tray, an ejector, an aligner, a pressing member, a friction member, and a switching device. The ejection tray stacks sheets. The ejector ejects a sheet to the ejection tray. The aligner is disposed downstream of the ejector in a direction of ejection of the sheet. The aligner is rotatable in a normal direction and a reverse direction. The pressing member applies pressure between the sheet and the aligner to enable the aligner to convey the sheet by rotation in the normal direction and the reverse direction. The friction member contacts the sheet ejected on the ejection tray to prevent conveyance of the sheet. The switching device switches contact and separation of the friction member with respect to the sheet.

An apparatus is disclosed. The apparatus comprises a transducer to transform a load in the housing to an electric current, upon receipt of a load exceeding a load threshold. The apparatus further comprises a light source coupled to the transducer to emit light upon receiving the electric current.

A post-processing apparatus includes a first discharge section configured to discharge a medium having thereon information recorded by a recording section, a processing tray configured to be loaded with the medium discharged by the first discharge section, an edge alignment section disposed on the processing tray, a transport section making contact with an upper surface of the medium mounted on the processing tray and configured to transport the medium to the edge alignment section, a position change section configured to change a relative position of the transport section with respect to the processing tray, and a controller configured to change pressure of when the transport section presses the medium by controlling the position change section, and a post-processing section configured to perform post-processing on the medium on the processing tray, wherein the controller changes the pressure based on processing information regarding processing to be performed on the medium.

According to an embodiment, a winding device includes a core, a transfer path, a pinch roller, a detection unit, a driving unit, and a control unit. A band body is wound around the core. The transfer path transfers the band body to the core. The pinch roller presses the band body being transferred in the transfer path from one side of a first direction intersecting a transfer direction, and presses a partial range of the band body in a second direction intersecting both the transfer direction and the first direction. The detection unit detects an abnormally shaped portion formed in the band body in the transfer path. The control unit controls the driving unit based on a result of detection by the detection unit.

In an example printing device may include a tray to receive print media sheets, and a paddle roller to rotate about an axis and move individual print media sheets of the print media sheets to abut an end register of the tray and form a stack of print media sheets, and the paddle roller rotate a first quantity of rotations per print media sheet based in response to a determination that the stack of print media sheets corresponds to a first height.