Method and apparatus for determining the operational status of a

Details Method and apparatus for determining the operational status of a Method and apparatus for determining the operational status of a

1975-04-21

1976-12-07

Braun, Fred L.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

250559, 250578, 340213Q, 354298, G01N 2106

Patent

active

039959597

ABSTRACT:
A method and apparatus for determining the operational status of a photographic film processor, particularly an X-ray film processor. A photographic film is exposed to a test pattern including at least three areas to produce, upon development of said test film, a light (medium density) area, a dark (high density) area and an unexposed (base fog) area. The test film is then developed, and densitometer readings made of the resultant film densities in the test areas. These densitometer readings are used as inputs to digital logic circuitry to produce a series of diagnostic indications of the processor's operational status.

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LogEtronics Inc. "Use and Service Manual LOGEFLO LD-24 Graphic Arts Film Processor/Dryer", revised Aug. 1969, pp. 21-27.

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