MICR data lift system
US4058706A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1976 |
| Grant date | Nov 15, 1977 |
| Priority date | — |
| Expiry date | Apr 23, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A magnetic ink character reading system is provided in which multi-element read heads are positioned in a spaced apart and staggered arrangement. Data signals occurring in the analog responses of the read heads are detected, and converted to discrete logic level signals under the control of a dynamically adjustable threshold. The logic level signals of each read head are sampled in response to independent data sample signals which are phase locked to the data rate of the respective read head. NRZ (non-return-to-zero) data signals formed thereby are synchronized to a common fixed frequency, and serialized faithfully to represent the characters appearing on documents passing the read heads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.