Inspection device
First Claim
Patent Images
1. A method for inspecting a liquid-filled transparent container for foreign particles in the liquid com- prising:
- a. placing the container at an inspection station,b. rotating said liquid about an axis while holding said container stationary,c. illuminating said container with a first lighting means comprising two light beams which intersect within said liquid and delineate an angular shadow zone radiating outwardly from said container,d. illuminating said container with a second lighting means which is positioned intermediate the two light beams of said first lighting means, said second lighting providing a light zone within said shadow zone and means having a lower intensity than said first lighting means,e. viewing said container with a viewing means positioned in said shadow zone of the first lighting means and within the light zone of the second lighting means to detect the presence of foreign particles.
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Abstract
A method and apparatus for lighting a container which is to be inspected for particulate contamination comprising a first lighting means consisting of two angularly displaced light beams which create an angular shadow zone, a second lighting means of significantly lower intensity than said first lighting means and positioned intermediate the two light beams and a viewing means positioned in the shadow zone.
25 Citations
23 Claims
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1. A method for inspecting a liquid-filled transparent container for foreign particles in the liquid com- prising:
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a. placing the container at an inspection station, b. rotating said liquid about an axis while holding said container stationary, c. illuminating said container with a first lighting means comprising two light beams which intersect within said liquid and delineate an angular shadow zone radiating outwardly from said container, d. illuminating said container with a second lighting means which is positioned intermediate the two light beams of said first lighting means, said second lighting providing a light zone within said shadow zone and means having a lower intensity than said first lighting means, e. viewing said container with a viewing means positioned in said shadow zone of the first lighting means and within the light zone of the second lighting means to detect the presence of foreign particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for inspecting a liquid-filled container for particulate contamination comprising:
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a. a first lighting means directed at said container, said first lighting means comprising at least two light beams directed at said container, said light beams intersecting within said liquid and delineating an angular shadow zone radiating outwardly from said container, b. a second lighting means intensity than said first lighting means and positioned intermediate said two light beams to provide a light zone within said shadow zone, c. a viewing, means positioned within said shadow zone and said light zone to detect the presence of foreign particles in the liquid. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification