Apparatus for the detection of faults in cups, glasses or the li

Optics: measuring and testing – By inspection with agitation or rotation – Of containers

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Details

250563, G01N 2188

Patent

active

044299982

ABSTRACT:
Improved apparatus is provided for use in detecting faults, such as cracks, "flashes," "short shots" and "grease" deposits, during the quality control inspection phase of the production of molded articles, such as cups, glasses, containers, lids or the like, especially those formed by injection molding from plastic material. The apparatus employs optical sensing and electrical signal handling techniques involving sensors for providing electrical signals (or signal controlling parameters) corresponding to the intensity of light transmitted through or/and reflected from an article being inspected, in conjunction with electrical, fault detection circuitry that responds equally well and produces a fault indicating, electrical output of like polarity for greater than threshold magnitude changes in either direction (decrease or increase) in the intensity of the light being sensed. The apparatus includes sensors permitting the detection of faults in either transparent or opaque articles.

REFERENCES:
patent: 3020033 (1962-02-01), McCreanor et al.
patent: 3533704 (1970-10-01), Krenmayer
patent: 3859537 (1975-01-01), Wolf
patent: 4066363 (1978-01-01), Juvinall

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