Data medium scanning process and apparatus
US4163157A · kind A · utility
13Cited by
3References
14Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 1, 1977 |
| Grant date | Jul 31, 1979 |
| Priority date | — |
| Expiry date | Aug 1, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/17
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Data medium scanning process and apparatus with compensation for positioning errors and dimensional variations. The invention relates to correcting the scanning of a data medium as a function of its position or dimensional errors. It relates to apparatus which receives signals corresponding to the position of a benchmark point and to the skew of a benchmark straight-line of data medium and then computes the coordinates of the scanning lines and of their skew and consequently controls certain deflectors ensuring the desired scanning. The invention exhibits particular utility in the verification of paper money such as bank notes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.