Arrangement for determining the optimum scan angle for printed documents
US4338588A · kind A · utility
18Cited by
15References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1980 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Jun 2, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0432
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sensor, having a plurality of parallel elongated light transducers, is rotated relative to a document to be aligned with a predetermined reference. A signal accumulated from the transducers reaches a distinct maximum when printed lines on the document are aligned with the elongated transducers. Detection of this maximum enables measurement of the angle by which the document is out of alignment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.