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US4957770A Coating weight measuring and control apparatus and method 失效
涂层重量测控装置及方法

Coating weight measuring and control apparatus and method
Abstract:
A sensor and a method for determining the basis weight of coating material on a substrate is described. The determined basis weight is insensitive to changes in the amount of substrate material underlying the coating. Signals from the sensor may be used in the control of a coating mechanism to provide a coating having a uniform basis weight.
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