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US 12,006,182 B2Granted
Medium feeding device and image reading apparatus
AssigneeSeiko Epson Corporation
InventorsTakayuki Shiota, Kazutoshi Nishida, Kiyotaka Nakamura
Life of this patent
Estimating the term…
Abstract
A medium feeding device includes a medium placing portion, a feeding roller that feeds paper, a medium movement detecting portion that is positioned on a placing region of the paper of the medium placing portion in a medium feeding direction and is capable of detecting movement of the paper being fed in a width direction intersecting the medium feeding direction, and a controller that stops feeding of the paper in a case in which a physical quantity relating to movement of paper in the width direction exceeds a predetermined threshold based on a detected result by the medium movement detecting portion.
Claims9
A medium feeding device comprising:
- a medium placing portion over which a medium is placed;
- a feeding roller configured to cooperate with a separating roller to feed the medium placed on the medium placing portion by coming into contact with a surface of the medium facing the medium placing portion and being rotated;
- a medium movement detecting portion that is fixed to a surface of the medium placing portion in a placing region of the medium placing portion over which the medium to be fed by the feeding roller can be placed, the medium movement detecting portion being upstream of the feeding roller and the separating roller and being configured to detect movement of the medium toward opposite sides of a width direction intersecting a medium feeding direction, the medium movement detecting portion detecting movement of the medium at a location disposed in the placing region and spaced from edge guides that guide edges of the medium moved in the medium feeding direction, the medium movement detecting portion optically detects movement within a two-dimensional plane;
- and
- a controller configured to stop feeding of the medium in a case in which a physical quantity relating to the movement of the medium in the width direction based on a detected result by the medium movement detecting portion exceeds a predetermined threshold,
- wherein a pair of the medium movement detecting portions is provided with a gap therebetween in the width direction,
- wherein the pair of medium movement detecting portions is respectively set as a first medium movement detecting portion and a second medium movement detecting portion, and
- wherein the controller stops the feeding of the medium in a case in which a difference between a physical quantity relating to movement of the medium in the width direction being detected by the first medium movement detecting portion and a physical quantity relating to movement of the medium in the width direction being detected by the second medium movement detecting portion exceeds a predetermined threshold.
5 more elements
A medium feeding device comprising:
- a medium placing portion on which a medium is placed;
- a feeding roller configured to cooperate with a separating roller to feed the medium placed on the medium placing portion by coming into contact with a surface of the medium facing the medium placing portion and being rotated;
- a first medium movement detecting portion and a second medium movement detecting portion, as a medium movement detecting portion, that are fixed to a surface of the medium placing portion in a placing region of the medium placing portion, are provided with a gap therebetween in a width direction intersecting a medium feeding direction as a pair, the medium movement detecting portion being upstream of the feeding roller and the separating roller and being configured to detect movement of the medium toward opposite sides of an axis and being set with the axis toward the medium feeding direction, the first medium movement detecting portion and the second medium movement detecting portion detecting movement of the medium at locations disposed in the placing region and spaced from edge guides that guide edges of the medium moved in the medium feeding direction, the medium movement detecting portion optically detects movement within a two-dimensional plane;
- and
- a controller configured to stop feeding of the medium in a case in which a difference between a physical quantity relating to movement of the medium in the medium feeding direction being detected by the first medium movement detecting portion and a physical quantity relating to movement of the medium in the medium feeding direction being detected by the second medium movement detecting portion exceeds a predetermined threshold.
2 more elements
Dependencies are inferred from the claim text.