Apparatus for the inspection of translucent containers

Details Apparatus for the inspection of translucent containers Apparatus for the inspection of translucent containers

G - Physics

01

N

73/53, 340/124.6

G01N 21/17 (2006.01) G01N 21/90 (2006.01)

Patent

CA 1158889

ABSTRACT OF THE DISCLOSURE The present specification describes an apparatus for the inspection of translucent containers comprising a conveyor for transporting a container through an inspection zone, and means for directing a plurality of light beams sideways at the container during its movement through the zone. Each light beam is directed at the side of the container from a different direction relative to the container, and deflection means cause each of the beams to repeatedly scan the side of the container in a vertical direction as the container moves fully through each beam. A respective opto-electronic light collector is provided for each beam for providing a respective signal representing the amount of light falling thereon from the respective beam after transmission through the container, and signal processing circuitry is associated with each light collector to examine the signal therefrom according to a predetermined criterion to generate a fault-indicating signal when such criterion is fulfilled. Means are provided for allocating to each beam a respective area of the container sidewall for which any such fault-indicating signal can be regarded as resulting from an actual fault rather than from a characteristic of an acceptable container, and any fault-indicating signal generated when the respective beam is not scanning the allocated area of the container sidewall is suppressed.

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