Finish Leak Detector having vertically movable light source

Details Finish Leak Detector having vertically movable light source Finish Leak Detector having vertically movable light source

1987-07-21

1988-11-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356240, G01N 904

Patent

active

047868015

ABSTRACT:
An apparatus for inspecting the sealing surface of a container for dips, saddles and lean is disclosed. While the container is rotated, a beam of light is projected horizontally above and through a finish portion of said container. An optical detector detects the height of said sealing surface by detecting the location of a minimum in the light beam. Dips in the height indicate dips or saddles. Alternately, an opaque bearing member is lowered onto the sealing surface in the path of the light beam to provide a reference indicative of the prevailing height of the sealing surface. Light passing between the underside of the bearing member and the sealing surface indicates a dip or saddle.

REFERENCES:
patent: 3089594 (1963-05-01), Early
patent: 4454542 (1984-06-01), Miyazawa
patent: 4606635 (1986-08-01), Miyazawa et al.
patent: 4701612 (1987-10-01), Sturgill

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