Image reading apparatus

Patent metadata

Field	Value
Publication number	US-11310388-B2
Application number	US-202017107538-A
Country	US
Kind code	B2
Filing date	Nov 30, 2020
Priority date	Sep 28, 2017
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

A scanner includes a reading unit that reads an image of a paper, a medium feeding portion that is capable of selecting a first feeding mode in which a separation feeding for separately feeding a paper bundle in which a plurality of sheets of paper is overlapped with each other is performed and a second feeding mode in which a non-separation feeding for collectively feeding the paper bundle without separating is performed, and a pair of first transporting rollers and a pair of second transporting rollers that transport the paper fed by the medium feeding portion, in a case in which the medium feeding portion feeds the paper in the second feeding mode, a first driven roller and a second driven roller respectively constituting the pair of first transporting rollers and the pair of second transporting rollers are driven in a rotation direction where the paper is transported.

First claim

What is claimed is:

1. An image reading apparatus comprising:
a reading unit that reads an image of a medium bundle;
a transport roller pair that transports the medium bundle,
wherein the transport roller pair is configured to rotate to transport the medium bundle in a first direction and a second direction, the second direction being opposite to the first direction,
wherein the transport roller pair transports the medium bundle in the first direction after transporting the medium bundle in the second direction, and
wherein the reading unit reads the image of the medium bundle that is transported in the first direction.

2. The image reading apparatus according to claim 1 ,
wherein a first contact load between the transport roller pair when the transport roller pair transports the medium bundle is set to be smaller than a second contact load between the transport roller pair when the transport roller pair transports the medium.

3. The image reading apparatus according to claim 2 ,
wherein both of the rollers of the transport roller pair are separated from each other when the transport roller pair transports the medium bundle.

4. The image reading apparatus according to claim 1 ,
wherein the reading unit includes a first reading unit that reads a first surface of the medium bundle and a second reading unit that reads a second surface of the medium bundle,
wherein the first reading unit moves relative to the second reading unit to change a gap between the first reading unit and the second reading unit, and
wherein the gap in a case in which the transport roller pair transports the medium bundle is set to be wider than the gap in a case in which the transport roller pair transports a medium.

5. The image reading apparatus according to claim 1 ,
a driving source that drives both of rollers of the transport roller pair to transport the medium bundle,
wherein both of the rollers of the transport roller pair are driven in a predetermined rotation direction, wherein both of the rollers of the transport roller pair transport the medium bundle to the second direction by the driving source.

6. The image reading apparatus according to claim 1 , further comprising:
a medium feeding portion that feeds the medium bundle,
wherein the medium feeding portion separates a medium from the medium bundle and transports the separated medium to the reading unit.

7. The image reading apparatus according to claim 1 , further comprising:
a driving source that drives both of the rollers of the transport roller pair to transport the medium bundle,
wherein the both of the rollers of the transport roller pair are driven by the driving source to transport the medium bundle.

8. The image reading apparatus according to claim 1 ,
wherein the transport roller pair is located on both sides of the reading unit in the first direction.

9. The image reading apparatus according to claim 1 ,
wherein the transport roller pair includes a driven roller and a drive roller,
wherein a load applying unit changes a contact load between the rollers of the transport roller pair,
wherein the load applying unit includes a spring supporting portion which is displaceable along a direction where the driven roller applies the contact load to the drive roller, and a pressing spring which is provided between the spring supporting portion and the driven roller, wherein the pressing spring presses the driven roller, and
wherein the contact load is adjusted by displacing the spring supporting portion.

10. The image reading apparatus according to claim 1 , further comprising:
a medium feeding portion that is configured to perform a first feeding mode in which a separation feeding is performed for separately feeding the plurality of medium that are overlapped with each other in the medium bundle, and is configured to perform a second feeding mode in which a non-separation feeding is performed for collecting and feeding the medium bundle without separating the plurality of medium,
an operation unit that switches the first feeding mode and the second feeding mode.

11. An image reading apparatus comprising:
a reading unit that reads an image of a medium bundle;
a first roller that transports the medium bundle in a first direction by rotating in a first rotation direction, the first roller transports the medium bundle in a second direction by rotating in a second rotation direction that is opposite to the first rotation direction;
a second roller that transports the medium bundle by nipping between the first roller and the second roller in the first direction by rotating in the second rotation direction, the second roller transports the medium bundle in the second direction by rotating in the first rotation direction,
wherein the first roller and the second roller transport the medium bundle in the first direction after transporting the medium bundle in the second direction, and
wherein the reading unit reads the image of the medium bundle that is transported in the first direction by the first roller and the second roller.

12. The image reading apparatus according to claim 11 , further comprising:
a transport roller pair that includes the first roller and the second roller,
wherein a first contact load between the first roller and the second roller when the transport roller pair transports the medium bundle is set to be smaller than a second contact load between the first roller and the second roller when the transport roller pair transports the medium.

13. The image reading apparatus according to claim 12 , further comprising:
a transport roller pair that includes the first roller and the second roller,
wherein the first roller and the second roller are separated from each other when the transport roller pair transports the medium bundle.

14. The image reading apparatus according to claim 11 ,
wherein the reading unit includes a first reading unit that reads a first surface of the medium bundle and a second reading unit that reads a second surface of the medium bundle,
wherein the first reading unit moves relative to the second reading unit to change a gap between the first reading unit and the second reading unit, and
wherein the gap in a case in which the transport roller pair transports the medium bundle is set to be wider than the gap in a case in which the transport roller pair transports a medium.

15. The image reading apparatus according to claim 11 , further comprising:
a transport roller pair that includes the first roller and the second roller,
a driving source that drives both of rollers of the transport roller pair to transport the medium bundle,
wherein the first roller is driven in a first rotation direction, which transports the medium bundle in the first direction, and a second rotation direction, which transports the medium bundle in the second direction by the driving source, and
wherein the second roller is driven in the second rotation direction which transports the medium bundle in the second direction by the driving source.

16. The image reading apparatus according to claim 11 , further comprising:
a medium feeding portion that feeds the medium bundle,
wherein the medium feeding portion separates a medium from the medium bundle and transports the separated medium to the reading unit.

17. The image reading apparatus according to claim 11 , further comprising:
a driving source that drives both of rollers of the transport roller pair to transport the medium bundle,
wherein both of the rollers of the transport roller pair are driven by the driving source to

Assignees

• Seiko Epson Corp

Inventors

• Tezuka Seiji
• Koyanagi Noriyuki
• Sakamoto Naoki

Classifications

• H04N1/00795

  Reading arrangements (details of scanning heads H04N1/024; scanning arrangements therefor H04N1/04) · CPC title

• B65H3/5284

  Retainers of the roller type, e.g. rollers · CPC title

• B65H2701/1926

  Opened booklet · CPC title

• H04N1/04 Primary

  Scanning arrangements {, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa}(H04N1/387 takes precedence) · CPC title

• B65H2801/39

  Scanning · CPC title