Chemistry: electrical and wave energy – Apparatus – Coating – forming or etching by sputtering
Patent
1974-12-05
1978-03-28
Braun, Fred L.
Chemistry: electrical and wave energy
Apparatus
Coating, forming or etching by sputtering
204109, 210 60, 210105, 354297, G03D 302
Patent
active
040818160
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 of contaminated fixer. The sensing device is further operative for causing a quantity of fresh washing fluid to be admitted into the downstream washing bath, which latter is in communication with the upstream washing bath. The downstream washing bath is provided with an outflow conduit so that, when the level in the washing bath exceeds a predetermined level, contaminated washing fluid flows out of the downstream washing bath and into the same collecting vessel as the contaminated developer.
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Dagon, T. J. "The Biological Treatment of Photographic Processing Effluents" Kodak pub. J-46, pp. 1-20, Sept. 1972.
Dawidowitsch Peter
Geyken Erwin
AGFA-Gevaert A.G.
Braun Fred L.
Striker Michael J.
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