Method and apparatus for detecting the deposition of an adhesive on a travelling web
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United States of America Patent
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Jul 4, 1989
Issued Date -
N/A
app pub date -
Feb 11, 1988
filing date -
Jul 20, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus is disclosed that detects the specular reflections from the surface of a travelling web to determine if a material is coated on the web. The web is illuminated with diffuse light and the reflected light is received by a detector which determines the presence and width of the coated material based on the specular reflections from the coated surface of the travelling web.
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