Wet-processing apparatus for photographic emulsion carriers with novel disposal of drier-unit exhaust air
US4189803A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Aug 1, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03D15/022
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The apparatus includes a washing unit at which film is washed with wash water, including a wash-water tank containing a body of wash water, and also a drier unit from which drying air is continually exhausted. Exhausted drying air from the drier unit is transmitted into the body of wash water in the wash-water tank. Alternatively, or in addition thereto, exhausted drying air is transmitted into the outflow conduit system for spent wash water. The wash water becomes oxygen-enriched and when sewered the oxygen demand of any processing fluids in the wash water poses a reduced threat to lifeforms in rivers and streams. Disposal of exhausted drying air in this way eliminates the need for chimney discharge, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.