Sheet thickness measuring system for measuring a thickness of va

Details Sheet thickness measuring system for measuring a thickness of va Sheet thickness measuring system for measuring a thickness of va

1997-05-02

1998-06-02

Karlsen, Ernest F.

Electricity: measuring and testing

A material property using electrostatic phenomenon

324671, 324716, 427 10, G01N 2702, G01B 706

Patent

active

057605890

ABSTRACT:
The present invention provides a sheet thickness measuring apparatus comprising electrostatic capacity measure means for measuring the electrostatic capacity of a sheet, resistance measure means for measuring a resistance value of the sheet, and calculation means for calculating a thickness of the sheet on the basis of the electrostatic capacity measured by the electrostatic capacity measure means and the resistance value measured by the resistance measure means.

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patent: 3857095 (1974-12-01), Mitchie et al.
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patent: 5198777 (1993-03-01), Masuda et al.
patent: 5208628 (1993-05-01), Ohashi et al.
patent: 5495178 (1996-02-01), Cheng

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