Apparatus for the wet processing of photographic sheet material
US5794091A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1996 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Dec 13, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03D3/132
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for the wet processing of photographic sheet material comprises at least one treatment vessel having a rotatable endless surface means biased towards a reaction member to define a nip there-between through which the sheet material path extends. At least one of the endless rotatable surface means and the reaction member comprises an inner region (58) of elastomeric material having a relatively low hardness, and an outer region (60) of elastomeric material having a relatively high hardness positioned over the inner region (58). Such a roller minimises carry-over between vessels without damage to the sheet material while being capable of successfully being used as a drive roller. The roller exhibits good stability against treatment liquids and has good processing qualities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.