G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 7/06 (2006.01) G01B 7/08 (1990.01)
Patent
CA 2082412
2082412 9118257 PCTABS00008 An electrical device for measuring the dry film thickness of a paint film applied to a conductive coating adhered to a plastic substrate without destroying the film; the device contains the following components: (a) an electric sensing means of two separate electrodes isolated from each other and positioned in a material capable of conforming to the surface of the film being measured where the sensing means are placed in contact with the surface of the film and measured under a uniform and reproducible pressure; (b) a gain and phase measuring device electrically connected to said sensing means for measuring the gain and phase of an alternating current electrical signal passed from one electrode through the film and conductive coating to the second electrode; (c) means electrically associated with the gain and phase measuring device which measures the gain and phase signals of the overall circuit of the two electrodes, the paint film and conductive coating and from the gain and phase signals calculates the thickness of the paint film and the resistance of the conductive coating.
Baer James A.
Falcoff Allan Frohm
Kremers Jan H.
Young James R.
E. I. Du Pont de Nemours And Company
Sim & Mcburney
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