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Abstract

Apparatus for detecting line-over defects at the finish of a glassware container. A bifurcated fiber optic bundle includes sender and receiver fiber branches; one of the branches terminates at a modulated visible red high intensity LED light source, the other at a photosensor. The non-bifurcated, probe end of the fiber optic cable terminates in a rectangular pattern of sending and receiving fibers in a random mix. The probe end of the fiber optic bundle is positioned directly over the container finish and pointed straight down. An intervening lens assembly produces a focused 1:1 image of the rectangular pattern at the bottle finish with the long axis of the rectangle oriented radially across the finish. An electronic assembly modulates the LED, demodulates the photodetector output, and detects sharp reductions in the intensity of light reflected back to the receiver fibers, indicative of line-over defects.

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First Claim