Sheet-feeding device with multistage stop arms

Patent metadata

Field	Value
Publication number	US-9580260-B2
Application number	US-201514963848-A
Country	US
Kind code	B2
Filing date	Dec 9, 2015
Priority date	Dec 15, 2014
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

A feeding device is disclosed, which comprises a paper passage, a sheet-separating roller, a friction institution, and a stopper. The sheet-separating roller is disposed in the paper passage. The friction institution is disposed in the paper passage opposite to the sheet-separating roller. The stopper is disposed in the upstream side of the sheet-separating roller. The stopper includes an axle, a short arm, and a long arm. The short arm connects to the axle, and the axle acts as a fulcrum. The long arm and the short arm disposed to the axle coaxially. A threshold of the force for pushing the short arm is larger than a threshold of the force for pushing the long arm.

First claim

What is claimed is:

1. A feeding device, comprising:
a paper passage;
a sheet-separating roller, disposed in the paper passage;
a friction institution, disposed in the paper passage and be opposite to the sheet-separating roller; and
a stopper, disposed in the upstream side of the sheet-separating roller, the stopper includes a axle, a short arm connected to the axle which being a fulcrum, and a long arm disposed on the axle with the short arm coaxially;
wherein, a threshold of the force for pushing the short arm is larger than a threshold of the force for pushing the long arm;
wherein, the short arm includes a heavy spring with a first elastic force, and the long arm includes a light spring with a second elastic force, wherein the first elastic force is larger than the second elastic force.

2. The feeding device of claim 1 , wherein the stopper causes sheets to constitute a structure of wedge-shaped inclined plane.

3. The feeding device of claim 1 , wherein the long arm is close to the short arm.

4. The feeding device of claim 3 , wherein the long arm is located in back of the short arm.

5. The feeding device of claim 1 , further comprising a sheet-transporting roller, disposed in the paper passage and located in the upstream side of the sheet-separating roller.

6. The feeding device of claim 5 , wherein at least one of sheets located in lower layer be transported to contact with the sheet-separating roller and the friction institution by the sheet-transporting roller.

7. The feeding device of claim 1 , wherein the stopper further comprising a third arm which length be longer than the length of the long arm, and the third arm is connected to the axle with the short arm and the long arm coaxially.

8. The feeding device of claim 7 , wherein the third arm is close to the long arm, and the third arm is located in back of the long arm.

9. The feeding device of claim 7 , wherein a threshold of the force for pushing the third arm is smaller than a threshold of the force for pushing the long arm.

10. A feeding device, comprising:
a paper passage;
a roller assembly, disposed in the paper passage; and
a stopper, disposed opposite the roller assembly, the stopper comprising multiple stop arms with a first elastic force and a second elastic force,
wherein, the stopper further comprising a axle, a short arm connected to the axle which being a fulcrum, and a long arm close to the short arm and disposed on the axle with the short arm coaxially,
wherein, the short arm includes a heavy spring with the first elastic force, and the long arm includes a light spring with the second elastic force,
wherein, the first elastic force is larger than the second elastic force.

11. The feeding device of claim 10 , wherein the stopper causes sheets to constitute a structure of wedge-shaped inclined plane.

12. The feeding device of claim 10 , further comprising a friction institution, and the roller assembly includes a sheet-separating roller and a sheet-transporting roller located in the upstream side of the sheet-separating roller, the friction institution is disposed in the paper passage and be opposite to the sheet-separating roller, at least one of sheets located in lower layer be transported to contact with the sheet-separating roller and the friction institution by the sheet-transporting roller.

13. The feeding device of claim 12 , wherein the stopper is disposed in the upstream side of the sheet-separating roller.

14. The feeding device of claim 10 , wherein the long arm is located in back of the short arm, a threshold of the force for pushing the short arm is larger than a threshold of the force for pushing the long arm.

15. The feeding device of claim 14 , wherein the stopper further comprising a third arm connected to the axle with the short arm and the long arm coaxially and located in back of the long arm, the length of the third arm is longer than the length of the long arm, and a threshold of the force for pushing the third arm is smaller than a threshold of the force for pushing the long arm.

16. A feeding device, being suitable for transporting sheets, the feeding device comprising:
a paper passage;
a roller assembly, transporting sheets in the paper passage; and
a stopper, comprising multiple stop arms with a first elastic force and a second elastic force,
wherein, the stopper further comprising a axle, a short arm connected to the axle which being a fulcrum, and a long arm close to the short arm and disposed on the axle with the short arm coaxially,
wherein, the short arm includes a heavy spring with the first elastic force, and the long arm includes a light spring with the second elastic force,
wherein, the first elastic force is larger than the second elastic force;
wherein, the velocity of sheets blocked by the first elastic force is slower than the velocity of partial sheets blocked by the second elastic force.

17. The feeding device of claim 16 , wherein a threshold of the force for pushing the short arm is larger than a threshold of the force for pushing the long arm.

Assignees

• Avision Inc

Inventors

• Cheng Sung-Po
• Hsueh Kai-Fan

Classifications

• B65H2404/60

  Other elements in face contact with handled material · CPC title

• B65H2404/722

  movable in operation · CPC title

• B65H2404/6942

  in sliding contact with handled material · CPC title

• B65H2801/39

  Scanning · CPC title

• B65H2801/06

  Office-type machines, e.g. photocopiers · CPC title