Medium conveying apparatus for correcting a skew of a medium
AssigneePfu Limited
InventorsTakayuki Umi, Shigeharu Okano
Life of this patent
Estimating the term…
Abstract
A medium conveying apparatus includes a plurality of feed rollers spaced in a direction perpendicular to a medium conveying direction, each of the feed rollers rotating independently at a respective speed to feed a medium, a plurality of brake rollers, each of the plurality of brake rollers being located to face a corresponding one of the plurality of feed rollers, a plurality of torque limiters separately provided between one of rotation shafts of the plurality of brake rollers and a corresponding one of the plurality of brake rollers, and a processor to detect a skew of the medium, and correct the skew of the medium by changing the speed of one of the plurality of feed rollers when the skew of the medium is detected.
Claims17
A medium conveying apparatus comprising:
- a feed roller to feed a medium;
- an imaging device to image the medium;
- a sensor located between the feed roller and the imaging device;
- and
- a processor to:
- detect a skew of the medium,
- cause the imaging device to end imaging when a first predetermined period elapses after a rear edge of the medium passes through the sensor when skew of the medium is not occurring, and
- cause the imaging device to end imaging when a second predetermined period longer than the first predetermined period elapses after the rear edge of the medium passes through the sensor when the skew of the medium is detected.
A method for imaging a medium, comprising:
- feeding the medium by a feed roller;
- imaging the medium by an imaging device;
- detecting a skew of the medium;
- causing the imaging device to end imaging when a first predetermined period elapses after a rear edge of the medium passes through a sensor located between the feed roller and the imaging device when skew of the medium is not occurring, and
- causing the imaging device to end imaging when a second predetermined period longer than the first predetermined period elapses after the rear edge of the medium passes through the sensor when the skew of the medium is detected.
A medium conveying apparatus comprising:
- a feed roller to feed a medium;
- a first sensor and a second sensor spaced in the direction perpendicular to the medium conveying direction on a downstream side of the feed roller in the medium conveying direction;
- an imaging device to image the medium;
- and
- a processor to:
- change an imaging range of the imaging device wherein the processor detects the skew of the medium when the first sensor does not detect the medium within a predetermined time after the second sensor detects the medium.
Dependencies are inferred from the claim text.