Vacuum document feeder
US4346876A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1980 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | May 12, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/1916
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A new and improved vacuum document feeder provides a vacuum cup support mechanism which follows a somewhat crescent-shaped coupler curve that eliminated the vacuum cup wear-producing disadvantages of the prior art and provides for increased feeding rates. A four-bar system moves a table over the somewhat crescent-shaped coupler curve, while at all times holding an edge of the table parallel to the documents. At least one vacuum cup is pivotally mounted on the table, to sweep over an angle which accommodates leaning documents. Cams on a drive pulley associated with the transport system coordinates the table movement with both the pivoting and vacuumizing of the cups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.