Provided is a plate material feeding device that can achieve reduced power consumption, improve durability, and supply plate material with high precision. A plate material feeding device is provided with a housing, a lower roll, an upper roll, a lower roll support member for supporting the lower roll, an upper roll support member for supporting the upper roll, and a slider movable in the horizontal direction along the upper roll support member, and can feed plate material clamped by the lower roll and the upper roll. A hole is provided in the slider, and a rod is provided in the upper roll support member. By inserting at least part of the rod in the hole in a slidable manner, the upper roll support member can move in the vertical direction when the slider moves in the horizontal direction.

A paper sheet feeding unit includes: a plurality of feed rollers; a plurality of gate rollers respectively disposed opposite to the plurality of feed rollers in a one-to-one relationship; a biasing member that biases the plurality of gate rollers individually in a direction of the plurality of feed rollers; and a supporting member that supports the plurality of gate rollers and the biasing member.

A recording apparatus includes a recording unit, a first transport path through which a medium is transported in a first direction during recording, a second transport path through which the medium after the recording is transported along a path that is different from the first transport path in a second direction, a discharge roller pair that is disposed at a downstream position of the recording unit and that is configured to be displaced between a nipping position and a separation position, and a flap that is disposed downstream of the recording unit. When the following medium is transported on the first transport path, the preceding medium is transported on the second transport path, and the respective media are disposed at a position of the discharge roller pair at the same time, the discharge roller pair is disposed at the separation position, and the flap is disposed at an advanced position.

A sheet feeding apparatus includes a sheet stacker to stack at least one sheet; a sheet feed roller disposed at one side of the sheet stacker and to feed a sheet fed from the sheet stacker; a multi-feed prevention roller disposed to face the sheet feed roller and to prevent multi-feed of the sheet fed from the sheet stacker; a magnetic torque limiter disposed coaxially with the multi-feed prevention roller; a hall sensor disposed at one side of the magnetic torque limiter and to detect rotation of the magnetic torque limiter; and a controller configured to rotate the sheet feed roller in a state in which the sheet feed roller and the multi-feed prevention roller are in contact with each other without a sheet and to identify a lifetime of the multi-feed prevention roller by using a signal output from the hall sensor.

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 post-processing device for processing a sheet includes a first post-processing section and a second post-processing section, for processing a sheet; a buffer section for temporarily staying a sheet transferred from a carry-in port; a first conveying section for conveying a sheet at the buffer section to the first post-processing section; and a second conveying section for conveying a sheet at the buffer section to the second post-processing section.

Job types include a first job type in which a second process is performed after a first process and a second job type in which the first process is performed and the second process is not performed. In a printer, a recording medium is allowed to be sandwiched by a center pinching roller and driving rollers. A controller of the printer includes a first primary elevation controller that controls the center pinching roller such that the center pinching roller stays down on the driving rollers to hold the recording medium in performing the first process in the first job type and a first secondary elevation controller that controls the center pinching roller to move upward and stay away from the driving rollers in performing the first process in the second job type.

A printer includes: a conveyor that performs a forward-conveyance operation for conveying a printing medium downstream in a conveying direction and a backward-conveyance operation for conveying the printing medium upstream in the conveying direction; a printing device; a roller provided downstream of the conveyor in the conveying direction; an opposed member opposed to the roller; a moving mechanism that moves a moving member, which is one of the roller and the opposed member, between (i) a first position at which the printing medium is nipped between the moving member and the other of the roller and the opposed member and (ii) a second position at which the moving member is separated from the printing medium; and a controller that executes a first conveyor-backward-conveyance processing for controlling the conveyor to perform the backward-conveyance operation in a state in which the moving member is located at the second position.

A printer includes: a conveyor that conveys a printing medium; a printing device that prints an image; a roller provided downstream of the printing device in a conveying direction; an opposed member opposed to the roller; a motor; a coupling mechanism that power-transmittably couples the motor and the roller to each other and rotate the roller in a first direction during driving of the motor, the first direction being a rotational direction for conveying the printing medium downstream in the conveying direction; and a moving mechanism that moves the roller between (i) a first position at which the roller is power-transmittably coupled to the motor by the coupling mechanism, and the printing medium is nipped by the roller and the opposed member and (ii) a second position at which the roller is power-transmittably coupled to the motor by the coupling mechanism and separated from the printing medium.

A transport apparatus includes a driving roller that transports a medium in a transport direction, a driven roller that presses the medium against the driving roller when the medium is transported, a changer that changes a pressing force by which the driven roller presses the medium against the driving roller, and a feeder configured to feed the medium toward the driving roller and pull back the medium in a direction opposite to the transport direction. Before the driving roller transports the medium, the feeder pulls back the medium after the changer has changed the pressing force to a value that is smaller than the value of the pressing force set for transport of the medium.