Apparatus for scanning a document
US5191442A · kind A · utility
5Cited by
24References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1990 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Apr 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0422
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for scanning documents combines digitizing circuitry with a scanning platen to achieve precise selection of image areas on large documents. A vacuum system holds the document in place against a perforated scanning surface during registration and scanning. The assembly of scanning surface, vacuum chamber, and digitizing circuitry move as a unit beneath a fixed scanning apparatus. The apparatus further has a mechanical structure which allows the table assembly to rotate about a pivot axis toward an operator to reduce parallax error in mapping image areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.