Photographic film package with lens
US6118942A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1999 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | May 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2219/045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic film packaging unit (1) which is provided with a lens (2) and which comprises at least one device for making an exposure, and which comprises a light-tight film housing on which the taking lens (2) is mounted, a film cartridge (10) which is enclosed in the light-tight film housing and which contains an empty spool (13), and a rolled up film (12), one end of which is attached to the spool core of the empty spool (13), wherein the film packaging unit (1) contains a motive spring (14) which is tensioned before being put into operation and which acts on the empty film cartridge (10) so that after each exposure the motive spring is released to such an extent that the film (12) is wound into the film cartridge by one frame and the shutter is made ready for release again, is distinguished by its particular convenience of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.