Microfilm cameras
US3963346A · kind A · utility
1Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1975 |
| Grant date | Jun 15, 1976 |
| Priority date | — |
| Expiry date | Apr 28, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A microfilm camera which includes a suction plate for holding a sheet of film. The suction plate is movable in steps across a picture gate. Between the objective lens and the contact surfaces of the picture gate there is a chamber formed at one end by a glass plate. The chamber is connected to a vacuum pump through a suction conduit. The suction conduit can be closed by a valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.