Apparatus for detecting locators on a film strip

Details Apparatus for detecting locators on a film strip Apparatus for detecting locators on a film strip

1979-02-02

1980-02-19

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

352 92, 352224, 355 50, 355 75, G03B 2752

Patent

active

041892283

ABSTRACT:
An apparatus for detecting a locator, e.g. a notch, perforation or mark, associated with each frame of an elongated film strip that is advanced through the apparatus. The apparatus includes guide members that are supported adjacent opposite longitudinal edges of the strip and a detector, such as a photoelectric cell and a light source, for sensing the locators. The guide members and the detector are coupled for movement in a direction transverse to the general direction of advancement of the strip and move in response to transverse wavering movement of the strip to ensure proper positioning of the detector relative to the locators as the locators approach the detector.

REFERENCES:
patent: 1404773 (1922-01-01), Hunt
patent: 2011272 (1935-08-01), Duggan
patent: 2995979 (1961-08-01), Gordon et al.
patent: 3358894 (1967-12-01), Hags
patent: 3558223 (1971-01-01), Hemphill
patent: 4120572 (1978-10-01), Grallert et al.

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