Apparatus and method for inspecting multi-layer plastic containers
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United States of America Patent
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Nov 22, 2005
Grant Date -
N/A
app pub date -
Apr 21, 2000
filing date -
Apr 23, 1999
priority date (Note) -
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Abstract
This invention relates to an apparatus and method for inspecting multi-layer plastic containers (10). More particularly, the invention relates to such an apparatus and method whereby optical energy absorbing compounds are added to the materials comprising the layer(s) of the container (10) to facilitate inspection thereof. Apparatus comprises a sensor unit (40), an illumination unit (30) for illuminating a portion of electromagnetic spectrum at a near IR wavelength to an inspection zone (20) which is located between the sensor unit (40) and the illumination unit (30). A processing unit (50) which receives an output of the sensor unit (40) and determines the attributes of the multilayer plastic containers (10).
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