Apparatus for the wet processing of photographic sheet material
US5689750A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1996 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | May 7, 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 (12, 12', 12") having upper and lower openings (17, 18), one of the openings (17) constituting a sheet material inlet and the other of the openings (18) constituting a sheet material outlet, the inlet and outlet defining there-between a substantially vertical sheet material path (20) through the vessel. The vessel comprises a rotatable roller (28) biased towards a reaction surface (30) to define a roller nip (36) there-between through which the sheet material path extends and associated with sealing means (38) to retain treatment liquid (24) in the vessel (12). The apparatus is characterised in that the roller (28) comprises a core (32) carrying a covering (34) of elastomeric material, the ratio (.phi./L) of the maximum diameter (.phi.) of the elastomeric material covering to the length (L) thereof being at least 0.012.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.