Lens-fitted photo film unit
US5897221A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Nov 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2219/045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens-fitted photo film unit is pre-loaded with unexposed photo film for taking an exposure thereon. A photo film roll chamber contains a roll of the unexposed photo film. A cassette containing chamber contains a cassette shell. The photo film is wound into the cassette shell after being exposed. A bottom opening is formed in a bottom of the cassette containing chamber. A bottom lid closes the bottom opening light-tightly, and is opened outwards after the photo film is wound into the cassette shell, to remove the cassette shell from the cassette containing chamber. An ejector projection is moved in response to outward opening movement of the bottom lid, and pushes the cassette shell toward an outside of the bottom opening, to move at least a bottom end face of the cassette shell out of the cassette containing chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.