Spot film apparatus and method of operating same
US4939764A · kind A · utility
2Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1987 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Nov 30, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B42/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Spot film apparatus which includes a menu-driven microprocessor for producing control signals to position a film cassette as required to carry out operations in a manner shown on a display. The spot film apparatus includes an improved carriage assembly which comprises a pair of opposing holding arms which conform with the film cassette. The opposing holding arms are biased towards each other with a helical spring. Loading of a cassette into the arms is accomplished by moving one arm with a continuous chain drive which supports a pawl-like member projecting therefrom, while maintaining the position of the second arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.