Apparatus for processing photographic film and treating contaminated processing liquids
US4081816A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1974 |
| Grant date | Mar 28, 1978 |
| Priority date | — |
| Expiry date | Dec 5, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/02
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An arrangement for developing latent images includes a mechanism for conveying an article which carries a latent image over a succession of containers which accommodate a developer, a washing fluid, a fixer and a washing fluid, respectively. A pressure chamber is arranged above each container and the article passes through the pressure chambers. A pump is associated with each pressure chamber and pumps the respective fluid therein for contact with the article. A sensing device located at an upstream end of the arrangement senses the length of the article and causes a quantity of fresh developer to be admitted into the container with the developer. Concomitantly, a corresponding amount of contaminated developer flows out of the container and into a collecting vessel. The sensing device activates a source of chemical neutralizing fluid and causes a quantity of the latter to be admitted into the collecting vessel for neutralizing the contaminated developer. The container with the fixing bath is connected with a chamber which is provided with a pair of electrodes and the sensing device is also effective for causing current to be supplied to the electrodes so as to permit regeneration o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.