A drive transmission device includes a first gear, a second gear, a switch arm, a third gear, a first sector gear including a first teeth portion and rotatable about a second axis in a predetermined direction, a second sector gear including a second teeth portion and engaging the first sector gear movably with play in the predetermined direction, a lever, a solenoid, and a first urging member. The switch arm has a cam contact surface, and the second sector gear includes a cam configured to contact the cam contact surface. When the first sector gear rotates in the predetermined direction for a predetermined amount from a state where the third gear engages the first gear and where the first teeth portion and the second teeth portion disengage from the second gear, the first teeth portion engages the second gear, and the second teeth portion disengages from the second gear.

An image forming apparatus includes a support portion configured to support a sheet, a roller configured to feed the sheet supported on the support portion, a separation member configured to apply a feeding resistance to the sheet fed by the roller from the support portion, a holder holding the roller, a holder pivoting member configured to pivot the holder between a first position where the roller contacts the sheet and a second position where the roller is separated from the sheet, a clutch mechanism, a clutch-state changing member, a rotator configured to rotate between an off position where the holder is at the second position and the clutch mechanism is at a cut-off state and an on position where the holder is at the first position and the clutch mechanism is at a transmission state, a stopper configured to stop the rotator, and an actuator connected to the stopper.

A sheet conveyance apparatus includes a guide member, a holding member, and urging members. The guide member can move between a first position to guide a conveyed sheet toward a first conveyance path and a second position to guide the conveyed sheet toward a second conveyance path. A first urging member applying applies an urging force to the holding member so that the guide member is held at the first position. The second urging member applies, to the guide member, an urging force to move the guide member from the first to the second position. The holding member is movable between a hold position at which the guide member is held and a release position in which the holding member releases the guide member. When the holding member is at the release position, the guide member is held at the second position by the second urging member urging force.

A sheet feeding apparatus includes a sheet receiving plate configured to receive a sheet and pivot in an up-down direction; a feed roller configured to pivot between a contact position where the feed roller contacts the sheet on the sheet receiving plate and a withdrawal position where the feed roller withdraws from the sheet; an urging member configured to urge the sheet receiving plate upward; an abutting portion configured to, when the sheet receiving plate pivots upward, abut the sheet and stop the sheet receiving plate; a moving member configured to, after the sheet abuts the abutting portion, move the sheet receiving plate to a sheet feed position; and a feed roller pivoting mechanism configured to, when the sheet receiving plate pivots upward, withdraw the feed roller to the withdrawal position and to, after the sheet contacts the abutting portion, move the feed roller to the sheet receiving plate.

An image forming apparatus includes a support portion configured to support a sheet, a roller configured to feed the sheet supported on the support portion, a separation member configured to apply a feeding resistance to the sheet fed by the roller from the support portion, a holder holding the roller, a holder pivoting member configured to pivot the holder between a first position where the roller contacts the sheet and a second position where the roller is separated from the sheet, a clutch mechanism, a clutch-state changing member, a rotator configured to rotate between an off position where the holder is at the second position and the clutch mechanism is at a cut-off state and an on position where the holder is at the first position and the clutch mechanism is at a transmission state, a stopper configured to stop the rotator, and an actuator connected to the stopper.

The apparatus includes a first clutch and a second clutch. The first clutch transmits rotation of the driving unit in a first rotation direction to the first feeding device without transmitting rotation of the driving unit in a second rotation direction that is reverse to the first rotation direction to the first feeding device. The second clutch transmits the rotation of the driving unit in the second rotation direction to the conveyance device and the double-side printing conveyance device and without transmitting the rotation of the driving unit in the first rotation direction to the conveyance device and the double-side printing conveyance device. The third transmission path is configured to transmit the rotation of the driving unit to a conveyance device. The fourth transmission path is configured to transmit the rotation of the driving unit to a double-side printing conveyance device.

A handoff mechanism for use with a media stacker of a media production apparatus comprises a plurality of kicker units (101) arranged across a width of the handoff mechanism. A common drive mechanism (103) is provided to move the plurality of kicker units (101) between a closed position and an open position. Each kicker unit (101), when in the closed position during use, applies a pressure to any media sheets that are already stacked in a stacker tray (105) while a new media sheet is being fed to the stacker tray. The pressure provided by each kicker unit (101) is independent of the pressure provided by the other kicker units.

The apparatus includes a first clutch and a second clutch. The first clutch transmits rotation of the driving unit in a first rotation direction to the first feeding device without transmitting rotation of the driving unit in a second rotation direction that is reverse to the first rotation direction to the first feeding device. The second clutch transmits the rotation of the driving unit in the second rotation direction to the conveyance device and the double-side printing conveyance device and without transmitting the rotation of the driving unit in the first rotation direction to the conveyance device and the double-side printing conveyance device. The third transmission path is configured to transmit the rotation of the driving unit to a conveyance device. The fourth transmission path is configured to transmit the rotation of the driving unit to a double-side printing conveyance device.

A guide mechanism including a guide that regulates a position of a paper sheet stacked includes a power transmitter that moves the guide to three or more positions by means of power obtained from a separate mechanism, which is different from the guide mechanism, and a switching drive that switches the power transmitter between a transmission state in which the power of the separate mechanism is transmitted to the guide and a non-transmission state in which the power of the separate mechanism is not transmitted.