Film holding system
US4184764A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1978 |
| Grant date | Jan 22, 1980 |
| Priority date | — |
| Expiry date | Jun 20, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film supporting and positioning system includes a film holding or gripping head for engaging an edge portion of the film and supporting the same in a cantilever fashion. The gripping head may include a frictional contact gripping arrangement or a vacuum head by which the film is held along one edge thereof. The gripping head is displaceable in a plurality of orthogonal directions so that the film may be inserted into and oriented relative to the image plane of an optical recording/reproducing system. In the vicinity of this image plane, a film support bearing is provided, in order that a prescribed region of the film, in which information may be recorded may be properly irradiated by a light beam. Preferably, the film support bearing is provided by a fluid bearing platen which is thermodynamically non-throttling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.