Method and apparatus for detecting the deposition of an adhesive

Details Method and apparatus for detecting the deposition of an adhesive Method and apparatus for detecting the deposition of an adhesive

1988-02-11

1989-07-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250561, 356448, G01N 2186

Patent

active

048453749

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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