A sheet conveyance apparatus includes a conveyance roller to convey a sheet, and a drive transmission mechanism to transmit a driving force from a driving source to the conveyance roller. The drive transmission mechanism includes a shaft, a first rotary member supported on the shaft, a second rotary member supported on the shaft and connected to the conveyance roller, and a coupling member engaged with the first rotary member and rotated integrally with the first rotary member. The coupling member is movable along the shaft between a coupling position, at which the coupling member engages with the second rotary member such that it rotates integrally with the first rotary member, and a release position, at which the coupling member is separated from the second rotary member such that a relative rotation of the second rotary member with respect to the first rotary member is permitted.

A transmission device includes a driving motor, a separation roller module, a correction roller module, a discharging roller module, a first clutch, a second clutch, a third clutch and a plurality of sensors which are mounted to an automatic sheet feeder. The first clutch is disposed between the driving motor and the separation roller module. The second clutch is disposed between the driving motor and the correction roller module. The third clutch is disposed between the driving motor and the discharging roller module. The plurality of the sensors sense signal variations at the time of a leading end or a tail end of each of the documents passing through the plurality of the sensors, and the plurality of the sensors transmit the signal variations to the first clutch, the second clutch and the third clutch.

The present disclosure is in one aspect to a dispenser for rolled sheet materials. The dispenser includes a feed roller that is rotatably mounted to a housing of the dispenser housing, and that is configured to feed a predetermined amount of sheet material from the supply of sheet material through a discharge provided along the housing of the dispenser. The dispenser also has a feed roller drive assembly with a drive motor, and a belt transmission assembly. The belt transmission assembly has a drive belt coupled to the drive motor and to the feed roller such that rotation of the feed roller is driven by operation of the drive motor.

A transmission device includes a driving motor, a separation roller module, a correction roller module, a discharging roller module, a first clutch, a second clutch, a third clutch and a plurality of sensors which are mounted to an automatic sheet feeder. The first clutch is disposed between the driving motor and the separation roller module. The second clutch is disposed between the driving motor and the correction roller module. The third clutch is disposed between the driving motor and the discharging roller module. The plurality of the sensors sense signal variations at the time of a leading end or a tail end of each of the documents passing through the plurality of the sensors, and the plurality of the sensors transmit the signal variations to the first clutch, the second clutch and the third clutch.

A sheet feeding apparatus includes an apparatus body, a feed member feeding a sheet, and a sheet storage member having first and second sheet storage portions. A sheet shifting portion pushes an upstream end of the sheet in the second sheet storage portion in a first direction so as to shift the sheet in the second sheet storage portion to the first sheet storage portion in the first direction. A driving motor generates a driving force moving the sheet shifting portion, and a moving portion moves the sheet shifting portion from a first position to a second position farther from the first sheet storage portion in a state in which the sheet shifting portion does not receive the driving force from the driving motor.

Provided are an image forming apparatus and an image forming method capable of coping with a medium exceeding a transport limit of a pair of rollers in image formation in which the medium is transported with the medium interposed between the pair of rollers. In a case where a medium exceeding a transport limit of first transport means to which medium transport using a first roller and a second roller is applied is used, second transport means is used to assist in the medium transport performed by the first transport means. The driving of second driving means for driving the second transport means is controlled using a driving signal applied to the driving control of the first driving means for driving the first transport means. Medium transport in which synchronization is taken between the first transport means and the second transport means is realized.

A document conveying apparatus includes a first conveying roller for conveying a document stacked on the document tray, a second conveying roller, provided at a downstream side with respect to the first conveying roller, for conveying a document stacked on the document tray, a separation roller, provided at a downstream side with respect to the second conveying roller, for performing separation operation of the document, a driving force transmission mechanism for transmitting the driving force to a driving shaft of the first conveying roller, a driving shaft of the second conveying roller, and a driving shaft of the separation roller, and a first blocking mechanism, provided between the first conveying roller and the driving shaft of the first conveying roller, for blocking a driving force transmitted to the driving shaft of the first conveying roller, for a first certain period of time.

An unwinder of reels of web material wound around winding spindles (A), includes a unwinding station (13) with at least one unwinding member (23) to rotate a reel (B) that is located in the unwinding station and feed the web material toward a delivery path (E). Lifting members (51, 53) are provided to lift a spindle of a first exhausted reel from the unwinding station (13), in a removal position (PR). An insertion member (7; 33) is further provided to insert a second reel into the unwinding station (13). A pressing member (61) is arranged to press the web material coming from the first reel in removal position (PR) against the second reel in the unwinding station (13).

Various apparatus embodiments include first, second, third and fourth shafts, and further include a first movable shaft having a first movable axis that is movable between a first axis position and a second axis position, and a second movable shaft having a second movable axis that is movable between a third axis position and fourth axis position. At least one linkage connects the first movable shaft to the second movable shaft. A motor linkage connects the at least one linkage to at least one motor for providing simultaneous movement of the first and second movable shafts.

A sheet transport device includes a transport unit that transports a sheet, an endless belt that transmits a driving force from a motor to the transport unit, a rotary member that rotates by being pressed by the sheet transported by the transport unit, and a sensor that generates a signal in accordance with rotation of the rotary member. The rotary member is arranged in such a manner that a portion of the rotary member faces an inner peripheral portion of the endless belt.