Photographic film cleaner
US4395793A · kind A · utility
10Cited by
13References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1982 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Feb 18, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/0052
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film cleaning apparatus cleans photographic film while the film is clamped at the print gate aperture of a photographic printer. When the film is clamped at the print gate, and before a print exposure is initiated, high velocity ionized air is directed onto both the top and bottom surfaces of the film to remove dust and other foreign materials from the film surfaces. When the exposure is commenced, the flow of ionized air is reduced to a low velocity which is sufficient to prevent dust from settling on the film surfaces during exposure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.