System and method for reading marks on a document
US4479194A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1982 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Aug 10, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C13/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A microprocessor based mark-sense ballot card reading system has automatic mark detection threshold adjustment, automatic skew and card speed correction, and provision for simultaneous, accurate reading of both sides of a ballot card regardless of card input orientation. A multidispatch, miltipage real time control program is utilized to enable multiple event detection on each card side and asynchronous processing of such multiple events on a two-sided card. Positive document sensing and control are monitored by the microprocessor control system. A folded card path card transport mechanism with diverter stations operates under microprocessor control to determine card destination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.