Automatic document alignment

1. A system comprising:

a document staging area including an alignment surface extending in a document feed direction;

an alignment roller supported to rotate about an axis and intermittently contact a document in the document staging area while rotating to move the document to abut the alignment surface, wherein the alignment roller includes a rubber surface extending along a portion of an outside surface of the alignment roller that contacts the document when the alignment roller rotates, and wherein the rubber surface includes a material selected to provide an amount of friction between the rubber surface and the document to cause the rubber surface to stop moving the document once the document abuts the alignment surface; and

a feed roller supported to rotate in the document feed direction to feed the document in the document feed direction after the alignment roller has rotated to move the document to abut the alignment surface.

2. The system of claim 1 , wherein the rubber surface of the alignment roller includes an O-ring.

3. The system of claim 2 , wherein the O-ring traverses the alignment roller.

4. The system of claim 1 , wherein the alignment roller is non-circular with a circular portion shaped to extend into the document staging area when the alignment roller is rotated.

5. The system of claim 1 , further comprising a controller connected to the alignment roller and the feed roller and configured to control operations of the alignment roller and the feed roller in response to receiving an indication from a sensor in the document staging area that the document has been introduced into the document staging area.

6. The system of claim 1 , further comprising a document scanner configured to receive the document from the feed roller and scan the document to produce a digital image of the document.

7. The system of claim 1 , further comprising a spring loaded plunger positioned in the document staging area and configured to hold the document in contact with the alignment roller as it is intermittently contacting the document.

8. A system comprising:

an alignment roller supported to rotate about an axis and intermittently contact a document in the document staging area while rotating to move a document in an adjacent document staging area to abut an alignment surface of the document staging area extending in a document feed direction, wherein the alignment roller includes a rubber surface extending along a portion of an outside surface of the alignment roller that contacts the document when the alignment roller rotates, and wherein the rubber surface includes a material selected to provide an amount of friction between the rubber surface and the document to cause the rubber surface to stop moving the document once the document abuts the alignment surface.

9. The system of claim 8 , further comprising an axle positioned adjacent to the document staging area, wherein the alignment roller is supported by the axle and the alignment roller includes a document contacting surface and a document non-contacting surface on its perimeter, wherein the distance from the axle to the document contacting surface of the alignment roller is equal to the distance from the axle to the document staging area, the distance from the axle to the document non-contacting surface of the alignment roller is equal to the distance from the axle to the document staging area, and the alignment roller is positioned so that the document contacting surface intermittently engages the document in the document staging area when the alignment roller rotates to move the document to abut the alignment surface.

10. The system of claim 8 , wherein the rubber surface of the alignment roller includes an O-ring.

11. The system of claim 10 , wherein the O-ring does not extend along the entire outer surface of the alignment roller.

12. The system of claim 9 , further comprising a feed roller to feed document in the document feed direction after the alignment roller completes a rotation.

13. The system of claim 12 , further comprising a document scanner configured to receive the document from the feed roller and scan the document to produce a digital image of the document.

14. The system of claim 13 , further comprising a controller connected to the alignment roller and the feed roller and configured to control operations of the alignment roller and the feed roller.

15. The system of claim 13 , further comprising a plunger positioned in the document staging area and configured to hold the document in contact with the alignment roller as it is intermittently contacting the document.

16. A method comprising:

for each of a plurality of documents in a document staging area, the document staging area including an alignment surface extending in a document feed direction:

rotating an alignment roller to intermittently contact a document in the document staging area to move the document to abut the alignment surface, wherein the alignment roller includes a rubber surface extending along a portion of an outside surface of the alignment roller that contacts the document when the alignment roller rotates, and wherein the rubber surface includes a material selected to provide an amount of friction between the rubber surface and the document to cause the rubber surface to stop moving the document once the document abuts the alignment surface; and

rotating a feed roller in the document feed direction to feed the document in the document feed direction upon the alignment roller completing a rotation.

17. The method of claim 16 , wherein the rubber surface of the alignment roller includes an O-ring.

18. The method of claim 16 , further comprising actuating a plunger to force a document from the plurality of documents into contact with the alignment roller before rotating the alignment roller.