Photographic processing apparatus
US5512972A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1994 |
| Grant date | Apr 30, 1996 |
| Priority date | — |
| Expiry date | Apr 29, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03D3/135
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatus for processing photographic sheet material including at least two rollers which are rotatively supported on corresponding shafts and biased together by springs acting on one of the shafts is provided with a mechanism operable to separate the rollers. The mechanism consists of a cam carried in normally free-wheeling relation on at least one end of one of the shafts, a cooperating cam follower carried on at least one end of the other shaft and a clutch that can be actuated to engage each such cam on its shaft for temporary rotation therewith to thereby displace the cam into contact with a cam follower and bring about separation of the roller shafts and the rollers supported thereon. The ends of the shaft acted on by the springs is preferably journaled in bearing blocks arranged in a frame for sliding movement towards and away from the other shaft and biased by the springs toward the other shaft. Preferably, the clutch is a one-way clutch that permits free rotation of the cam when the one shaft is rotating in one direction and engages to rotate the cam with the shaft when the shaft is caused to rotate in the other direction. Each cam is held in a given position relative to t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.