Browse Prior Art Database

Testing Magnetic Tape in Production

IP.com Disclosure Number: IPCOM000095487D
Original Publication Date: 1964-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Bate, G: AUTHOR [+3]

Abstract

The arrangement is for measuring electrical characteristics for a conductive surface placed on a non-conductive web. The web may be plastic and the conductive surface may be applied by plating.

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Testing Magnetic Tape in Production

The arrangement is for measuring electrical characteristics for a conductive surface placed on a non-conductive web. The web may be plastic and the conductive surface may be applied by plating.

The resistance across the web conducting surface may be measured by a pair of probes 11 and 12 placed on opposite sides of the web through which a constant voltage source is applied. An ammeter 21 will measure a current indicative of the lateral resistance and show variations in average lateral thickness as the web moves. Also a pair of Hall probes 14 and 15 may be provided for measuring the remanence of the surface and indicating the remanence on meters 22 and 23.

A section 16 of the tape may be slitted from one side and passed through a vibrating coil magnometer 17 which has its outputs connected to a B-H loop tracer 24. Thus, the major electrical characteristics of the tape can be measured simultaneously during manufacture.

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