Technique for switching rotational speed of plurality of rotating members
AssigneeCanon Kabushiki Kaisha
InventorsSatoshi Tsuda, Takashi Yano
Life of this patent
Estimating the term…
Abstract
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.
Claims15
A sheet conveying apparatus comprising:
- a first conveying roller configured to convey a sheet;
- a second conveying roller disposed on a downstream side of the first conveying roller in a conveyance direction of the sheet;
- a first transmission mechanism configured to transmit a driving force generated by the motor to the second conveying roller;
- a second transmission mechanism provided parallel to the first transmission mechanism and configured to transmit the driving force to the first conveying roller;
- and
- a third transmission mechanism configured (i) to transmit the driving force transmitted via the second transmission mechanism to the second conveying roller and (ii) not to transmit the driving force transmitted via the first transmission mechanism to the first conveying roller,
- wherein in a case where the second conveying roller rotates at a first speed by the first transmission mechanism transmitting the driving force to the second conveying roller, the second transmission mechanism and the third transmission mechanism do not transmit the driving force to the first conveying roller and the first conveying roller rotates by being driven with respect to the second conveying roller, and
- in a case where the second conveying roller rotates at a second speed faster than the first speed by the third transmission mechanism transmitting the driving force transmitted via the second transmission mechanism to the second conveying roller, the first conveying roller rotates at the second speed by the second transmission mechanism transmitting the driving force to the first conveying roller.
An image forming apparatus comprising:
- a conveying mechanism configured to convey a sheet;
- and
- an image forming mechanism configured to form an image on the sheet conveyed by the conveying mechanism,
- the conveying mechanism comprising:
- 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;
- a first transmission mechanism configured to transmit a driving force generated by the motor to the second conveying roller;
- a second transmission mechanism provided parallel to the first transmission mechanism and configured to transmit the driving force to the first conveying roller;
- and
- a third transmission mechanism configured (i) to transmit the driving force transmitted via the second transmission mechanism to the second conveying roller and (ii) not to transmit the driving force transmitted via the first transmission mechanism to the first conveying roller,
- wherein in a case where the second conveying roller rotates at a first speed by the first transmission mechanism transmitting the driving force to the second conveying roller, the second transmission mechanism and the third transmission mechanism do not transmit the driving force to the first conveying roller and the first conveying roller rotates by being driven with respect to the second conveying roller, and
- in a case where the second conveying roller rotates at a second speed faster than the first speed by the third transmission mechanism transmitting the driving force transmitted via the second transmission mechanism to the second conveying roller, the first conveying roller rotates at the second speed by the second transmission mechanism transmitting the driving force to the first conveying roller.
Dependencies are inferred from the claim text.