On line web thickness measuring apparatus

Details On line web thickness measuring apparatus On line web thickness measuring apparatus

G - Physics

01

B

G01B 11/14 (2006.01) G01B 7/14 (2006.01) G01B 11/02 (2006.01)

Patent

CA 2087155

Abstract of the Disclosure Apparatus for measuring the thickness of a moving web of material in which a ferromagnetic core carrying a winding and a ferromagnetic disc are disposed on opposite sides of the web at constant distances therefrom with at least one of said distances being maintained by a servomechanism including an optical distance measuring device whereby the inductance of said coil is a measure of the thickness of the web. I

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