Thickness detecting caliper for sheet material having...

Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material

Reissue Patent

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C324S231000, C033S501030

Reissue Patent

active

RE039037

ABSTRACT:
A pair of elastic strips are provided in order to hold sheet material to be measured in thickness. Each of the elastic strips includes of one or more elastic films. Ends of the elastic strips are supported by support portions, and the other ends of the elastic strips are provided with respective coils, opposed to push each other, and kept in contact with each other. When the sheet material is held between support portions, the inductances of the coils are changed and the thickness of the sheet material is detected as an electric signal representative of the changed inductance.

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patent: 5297062 (1994-03-01), Cresson et al.
patent: 6281679 (2001-08-01), King et al.
patent: 9-46809 (1997-02-01), None

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