Method and apparatus for detecting foreign matter within a layer of tabacco
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United States of America Patent
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Dec 19, 1995
Issued Date -
N/A
app pub date -
Aug 6, 1992
filing date -
Apr 5, 1990
priority date (Note) -
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Abstract
The invention is directed to a method and apparatus for detecting foreign matter including small particles of organic materials such as plastics within a layer of tobacco. The tobacco is irradiated with a plurality of selected NIR radiation wavelength bands. Data representative of the NIR radiation exiting the tobacco is compared to a predetermined reference representative of a plurality of different tobacco samples to determine whether the inspected tobacco contains foreign matter.
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