Light and dust seal for camera
US5140354A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1991 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Jun 12, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera has a rear door which is opened to reveal a cartridge receiving chamber, a pair of substantially parallel film rails located adjacent opposite sides of an exposure opening to support successive lengths of a filmstrip over the exposure opening, and a film take-up chamber. A rigid film pressure plate is connected to the inside of the door to rest against the rails over the exposure opening when the door is closed, to support successive lengths of the filmstrip flat at the exposure opening. According to the invention, a single-piece of resilient compressible opaque material is secured to the inside of the door to form a unitary deformable surface for sealing the cartridge receiving chamber, the exposure opening, and the film take-up chamber against ambient light and dust and urging the pressure plate against the film rails when the door is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.