Head for optical card reader
US4528445A · kind A · utility
5Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1982 |
| Grant date | Jul 9, 1985 |
| Priority date | — |
| Expiry date | Nov 3, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10762
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention is directed to an optical card reader in which the cards to be read have a format arranged in columns and rows. A row of timing marks or slots is formed in the card for each column of data. The card is driven past a read head block that directs the light to the card in which the reflected light is received through a shaped aperture or orifice so that a positive indication of the marked area is detected. The signal is applied to an operational amplifier for further treatment. There are a plurality of light sources and sensors transversely arranged in the read head block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.