Method and arrangement for the development of latent images particularly latent photographic images
US4160594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1977 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Sep 22, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/919
- 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, which is related to the size of the article, 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, which is related to the size of the article, 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 ef…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.