Microfilming system
US4324474A · kind A · utility
6Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 1980 |
| Grant date | Apr 13, 1982 |
| Priority date | — |
| Expiry date | May 21, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/72
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A system for microfilming documents that employs microprocessor control to insure fault-free operation. The aspects of operation; such as document present, size of document, size of photographic mask, the exposure parameter, and system "ready", must meet necessary criteria, or the microprocessor will halt operations and present a human-readable response as to the cause. Substitutional tables for supporting documents are available, to relate to the characteristics of the document. Simultaneous conflicting commands are executed sequentially according to a priority sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.