Photo film analyzer, and method and system for inspecting photo

Details Photo film analyzer, and method and system for inspecting photo Photo film analyzer, and method and system for inspecting photo

1994-05-31

1995-06-13

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

355 41, G01N 2186

Patent

active

054245559

ABSTRACT:
A scanner as a film analyzer, which inspects a frame on photo film, is consecutively supplied with the film by a notcher, which forms a notch in the film. The scanner includes an image area sensor which subjects the frame on the film to photometry. A pair of feeding rollers feed the film, so the film passes the photometric station. A winding shaft winds the film fed from the photometric station. A dancer roller displaces one portion of the film from a feeding path to form a loop. A set of loop checking sensors is disposed with the dancer roller, and checks displacement of the film in comparison with a predetermined upper limit. The notcher is disabled if the film displacement is greater than the upper limit. The displacement of the film is checked in comparison with a predetermined lower limit. The image area sensor is disabled if the film displacement is smaller than the lower limit.

REFERENCES:
patent: 4641019 (1987-02-01), Inatsuki

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