Method and apparatus for the development of films in a photograp

Details Method and apparatus for the development of films in a photograp Method and apparatus for the development of films in a photograp

1980-06-02

1982-01-26

Franklin, Lawrence R.

Fluid handling

Flow affected by fluid contact, energy field or coanda effect

Means to regulate or vary operation of device

354324, 137563, 137572, G03D 306

Patent

active

043125867

ABSTRACT:
This invention is concerned with a method and apparatus for the development of photographic films in a photographic film processor in which the films are developed when the exposed films pass through a developing tank containing developer. The object of said invention is to attain uniform development with a simple method, that is, to make the change of the activity of the developer during the development of the films to be treated very small from the leading end to the trailing end of the film. The said invention makes the influence of the momentarily changing activity of the developer in contact with the films as small as possible by compensating for the decrease of the activity due to the exhaustion of the developer by gradually increasing the immersion time of the films in the developer from the leading end toward the trailing end of the photographic films by gradually changing the relative level of the liquid surface when the films are fed into the developer.

REFERENCES:
patent: 3626832 (1971-12-01), Kappeler et al.
patent: 3841351 (1974-10-01), Shida
patent: 3983934 (1976-10-01), Lee
patent: 4215719 (1980-08-01), Laar et al.

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