Film strip for rapid test of a film processor

Details Film strip for rapid test of a film processor Film strip for rapid test of a film processor

1982-05-19

1985-04-02

Turk, Arnold

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

235466, 235474, 235482, 235487, 2504741, 250569, 250571, 356243, 422 66, 436 58, G01N 2159, G01N 2184

Patent

active

045086869

ABSTRACT:
Apparatus and test film strip for evaluation of a film processor, particularly an x-ray film processor, based on a photodetector signal sequentially indicating the optical density of graded density test areas on a developed film and comparing the output thereof to a preselected voltage relating to the acceptable/too dark threshold of an unexposed or base fog area, the acceptable or too light threshold of a maximum density or dark area and the acceptable/too light and acceptable/too dark threshold of a medium density test area. Sequence testing of the graded density areas is functionally related on a single film strip to timing marks, adapted to be read by photodetector and timing circuitry, the timing marks and graded density test areas being linearly spaced and relatively disposed along the length of film strip.

REFERENCES:
patent: 2253231 (1941-08-01), Friedell
patent: 3858032 (1974-12-01), Scantlin
patent: 3894238 (1975-07-01), Cox et al.
patent: 3916157 (1975-10-01), Roulette et al.
patent: 3995959 (1976-12-01), Shaber
patent: 4130756 (1978-12-01), Arnot et al.
patent: 4174178 (1979-11-01), Ouchi et al.
patent: 4236828 (1980-12-01), Kaneko et al.
patent: 4239395 (1980-12-01), Modisette

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