Method and device for processing a photographic film
US5678112A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Jul 19, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/44
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention concerns a method and a device for processing a photographic film. The process comprises the following steps: a) circulating the film (2) in a series of processing baths (5, 6, 7, 8), each of the baths having a rinsing zone (53, 62, 73, 82) including one or more tanks; b) recovering and treating the waste water coming from all the rinsing zones in a single nanofiltration device (100), common to all the processing baths; and c) recycling the permeate (106) from the nanofiltration device (100) in each of the rinsing zones (43, 62, 73, 82) of each of the processing baths (5, 6, 7, 8). Application to the processing of photographic films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.