Microfilm reader/printer with normally open and removable glass flat assembly
US4198137A · kind A · utility
1Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 26, 1978 |
| Grant date | Apr 15, 1980 |
| Priority date | — |
| Expiry date | Apr 26, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/118
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A pair of glass flats are mounted in a removable carrier frame assembly, which is adapted to be inserted into a microfilm reader/printer. Supports on the carrier frame may be rested upon a front panel of a reader/printer in order to facilitate an alignment and an insertion of the carrier. A solenoid controlled mechanical linkage normally holds the glass flats in an open position except when the film is actually being projected. Then, they close. Signals are sent back to indicate to the reader/printer whether the flats are opened or closed and to control it in response thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.