Medium feed apparatus to put separation roller on hold until front end of medium passes separation part
AssigneePfu Limited
InventorsTomoyuki Niwata, Shota Otsuka
Life of this patent
Estimating the term…
Abstract
A medium feed apparatus includes a first sensor, a second sensor, a third sensor to detect rotation of the separation roller, and a processor. The processor controls a motor to put the separation roller on hold from when starting the feed of the medium to when the second sensor detects a front end of the medium and generate the drive force from when the second sensor detects the front end of the medium to when the first sensor detects a back end of the medium, and controls the motor to stop the feed roller while generating the drive force if the third sensor detects rotation of the separation roller in the opposite direction to the medium feed direction during feed of the medium.
Claims20
A medium feed apparatus comprising:
- a feed roller configured to feed a medium;
- a separation roller located facing the feed roller;
- a motor configured to generate a drive force for rotating the separation roller in an opposite direction to a medium feed direction;
- a first sensor located at an upstream side from the feed roller and separation roller in a medium conveyance direction;
- a second sensor located at a downstream side from the feed roller and separation roller in the medium conveyance direction;
- a third sensor configured to detect rotation of the separation roller;
- and
- a processor to rotate the feed roller in the medium feed direction to feed the medium, wherein
- the processor
- controls the motor to put the separation roller on hold from when starting the feed of the medium to when the second sensor detects a front end of the medium and generate the drive force from when the second sensor detects the front end of the medium to when the first sensor detects a back end of the medium, and
- controls the motor to stop the feed roller while generating the drive force if the third sensor detects rotation of the separation roller in the opposite direction to the medium feed direction during feed of the medium.
A medium feed method comprising:
- rotating a feed roller in a medium feed direction to feed a medium;
- controlling a motor to put a separation roller located facing the feed roller on hold from when starting the feed of the medium to when a second sensor located at a downstream side from the feed roller and separation roller in a medium conveyance direction detects a front end of the medium and generate a drive force for rotating the separation roller in an opposite direction to the medium feed direction from when the second sensor detects the front end of the medium to when a first sensor located at an upstream side from the feed roller and separation roller in the medium conveyance direction detects a back end of the medium;
- and
- controlling the motor to stop the feed roller while generating the drive force if a third sensor detects rotation of the separation roller in the opposite direction to the medium feed direction during feed of the medium.
A computer-readable, non-transitory medium storing executable instructions for feeding a medium, the executable instructions comprising:
- rotating a feed roller in a medium feed direction to feed the medium;
- controlling a motor to put a separation roller located facing the feed roller on hold from when starting the feed of the medium to when a second sensor located at a downstream side from the feed roller and separation roller in a medium conveyance direction detects a front end of the medium and generate a drive force for rotating the separation roller in an opposite direction to the medium feed direction from when the second sensor detects the front end of the medium to when a first sensor located at an upstream side from the feed roller and separation roller in the medium conveyance direction detects a back end of the medium;
- and
- controlling the motor to stop the feed roller while generating the drive force if a third sensor detects rotation of the separation roller in the opposite direction to the medium feed direction during feed of the medium.
Dependencies are inferred from the claim text.