Method and apparatus for developing microfilm
US4141640A · kind A · utility
4Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1977 |
| Grant date | Feb 27, 1979 |
| Priority date | — |
| Expiry date | Apr 18, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03D7/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing station for developing microfiche includes a pair of closely spaced walls, an inflatable tube defining the developing region of the station, a system for inflating the tube to seal the region, and a member for transporting a copy sheet into the region. The transporting member is withdrawn from the region during the developing step and moved back into the region subsequent to the developing step to transport the copy sheet from the developing region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.