Continuous film-developing machine

Details Continuous film-developing machine Continuous film-developing machine

1979-04-04

1980-09-16

Hix, L. T.

Cleaning and liquid contact with solids

Apparatus

Sequential work treating receptacles or stations with means...

354321, 134 56R, G03D 306

Patent

active

042226570

ABSTRACT:
A continuous film developing machine adapted for processing photographic films of different formats and different patterns of film perforations, includes a series of treatment baths arranged consecutively in the path of movement of the processed film. Dosing devices with feeding valves adjust the amount of additional filling into the respective baths. A set of pneumatic sensors in the form of air nozzles is arranged opposite one side of the processed film strip, whereas a corresponding set of pressure air operated switches is arranged at the other side of the strip opposite respective nozzles. The switches detect the air jets passing through the perforations characteristic of each film format and actuate relay controlled switches which in turn put into operation a dosing device pertaining to the format of the processed film.

REFERENCES:
patent: 2778734 (1957-01-01), Fairbank
patent: 3334566 (1967-08-01), Friedel
patent: 3487763 (1970-01-01), Pensgen
patent: 3532047 (1970-10-01), Pensgen
patent: 3639061 (1972-02-01), O'Brien et al.
patent: 3699869 (1972-10-01), Jensen
patent: 3763758 (1973-10-01), Manack et al.
patent: 3787689 (1974-01-01), Fidelman
patent: 4021832 (1977-05-01), Krehbiel et al.
patent: 4119952 (1978-10-01), Takahashi et al.

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