A sheet conveying apparatus may comprise a first conveying roller configured to convey a sheet and a second conveying roller disposed on a downstream side of the first conveying roller in a conveyance direction of the sheet. In a case where the second conveying roller rotates at a first speed by a driving force being transmitted to the second conveying roller, the first conveying roller rotates by being driven with respect to the second conveying roller. In a case where the second conveying roller rotates at a second speed faster than the first speed by the driving force being transmitted to the second conveying roller, the first conveying roller rotates at the second speed.

A driving force transmitter, including a coupling member, a cam member, an electromagnetic clutch, a sensor, and a controller, is provided. The coupling member arranged between a driving source and a driven device includes a first shaft, a second shaft, a stationary coupling member, and a movable coupling member which is movable between a separating position and an engaging position. The cam member is rotatable to move the movable coupling member. The electromagnetic clutch connects the cam member with the driving source when electrically powered and disconnects the cam member when not electrically powered. The sensor detects rotational positions of the cam member. The controller switches the electricity to the electromagnetic clutch according to the rotational positions of the cam member.

An image reading device includes: a discharge guide including a discharge opening for discharging the sheet conveyed by the conveyance guide to the discharge tray, the discharge guide being configured to move from a third position to a fourth position according to the decrease in the number of the sheet to be supported by the supply tray, the fourth position being higher than the third position; a discharge roller configured to discharge the sheet through the discharge opening; and a first drive source which generates a first drive force for moving the discharge guide between the third position and the fourth position, wherein the first drive force is also used for rotating the discharge roller.

A medium processing device includes a processor, a feed roller, a motor, a motive force transmission gear that transmits motive force of the motor to the feed roller, a switching unit that is configured including a main gear and a sub gear that meshes with the main gear and moves in planetary motion around the main gear, and that switches accompanying rotation direction switching of the main gear between a meshed state and a disengaged state between the sub gear and the motive force transmission gear, a load detection unit that detects load of the motor, and a controller. The controller controls the motor and the processor according to the load detected by the load detection unit at switching of the sub gear from the disengaged state to the meshed state.

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 invention relates to a switch assembly for a device for handling value documents, comprising a shaft (110) which is rotationally fixed to a switch body (120), said switch body (120) being rotatable about the longitudinal axis of the shaft (110) between a first switch body position (P1) and a second switch body position (P2). The switch assembly additionally comprises a switch lever (130, 131), said shaft (110) being rotatable about its longitudinal axis by means of the switch lever (130, 131), and a solenoid (200) which comprises an armature (210). The solenoid (200) can be actuated such that the armature (210) can be moved between a first armature position (A1) and a second armature position (A2). The switch lever (130, 131) is in engagement with the armature (210) such that the switch lever (130, 131) rotates about the longitudinal axis of the shaft (110) by means of the movement of the armature.

A sheet conveyor includes a separation roller, a retard roller forming a nip with the separation roller, and a load application device configured to apply a load to the retard roller. The load application device includes a motor, a first drive train, a second torque limiter isolated from the first drive train, and a controller. The first drive train includes a plurality of gears for transmitting a driving force from the motor to the retard roller, a first torque limiter, and a clutch disposed between the motor and the first torque limiter. The second torque limiter is configured to communicate with the retard roller. The controller is configured to, during conveyance of a sheet, control the clutch to allow transmission of the driving force from the motor for a predetermined time period and to interrupt transmission of the driving force from the motor after expiration of the predetermined time period.

An image reading apparatus includes a supply tray which support sheets and includes a movable plate configured to move in correspondence to reduction in a number of the sheets supported on the supply tray, a discharge tray which is located below the supply tray and supports discharged sheets, a conveyance guide which guides a sheet conveyed from the supply tray toward the discharge tray, a reading sensor which reads an image on the sheet conveyed along the conveyance guide, and a discharge unit having a discharge opening for discharging the sheet to the discharge tray and moves from a third position to a fourth position in correspondence to reduction in the number of the sheets supported on the supply tray. A first timing for which the movable plate is to move and a second timing for which the discharge unit is to move are different.

The feeding apparatus includes a pick-up roller, a feed roller, a separation roller which forms a separation nip portion with the feed roller, an encoder, and an engine control unit. The engine control unit obtains variation in rotation speed of the separation roller based on a detection result of the encoder, and determines a life condition of the separation roller based on the obtained variation in rotation speed of the separation roller.

An image reading apparatus includes a feeding roller that includes a first roller and a second roller provided at an interval in a width direction intersecting a medium feeding direction, and feeds a sheet from a placing section; and a skew detection section that detects skew of the sheet fed from the feeding roller. Skew is corrected by giving a difference between a rotation speed of the first roller and a rotation speed of the second roller with respect to at least one of the relevant sheet detected by the skew detection section and subsequent sheets fed following the relevant sheet based on a skew amount in the sheet.