Coating processes – Measuring – testing – or indicating – Thickness or uniformity of thickness determined
Patent
1993-12-01
1995-04-25
Drodge, Joseph W.
Coating processes
Measuring, testing, or indicating
Thickness or uniformity of thickness determined
118665, 118119, 118126, 427 9, 427359, B05D 312
Patent
active
054097320
ABSTRACT:
A method for regulating the thickness of an applied coating. The method includes passing a web through two members which define a gap between them. A sensor measures periodic variations in the thickness of the coating on the web. An automatic controller analyzes information from the sensor and converts the information into gap adjusting signals. Piezoelectric or magnetostrictive translators adjust the size of the gap to compensate for repeating variations in coating thickness.
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Leonard William K.
Mohn Stephen W.
Schiller P. Daniel
Drodge Joseph W.
Griswold Gary L.
Kirn Walter N.
Levinson Eric D.
Minnesota Mining and Manufacturing Company
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