Magnetic recording member abrasion tester

Details Magnetic recording member abrasion tester Magnetic recording member abrasion tester

1977-04-18

1978-05-30

Swisher, S. Clement

Measuring and testing

By abrasion, milling, rubbing, or scuffing

G01N 356

Patent

active

040916545

ABSTRACT:
A device and method are disclosed for testing the abrasion quality of a magnetic recording member to cause recording head wear. A magnetic recording member to be tested is moved past a dummy recording head, the smoothness of which has been determined before the head is contacted with the magnetic recording surface. After a predetermined contact between the dummy head and the tape, the smoothness of the head is again determined which is a direct function of the abrasion characteristics of the tape. The smoothness of the dummy head is determined by means of a non-contact photonic sensor which converts reflective light from the surface of the head into a specific voltage output.

REFERENCES:
patent: 3359783 (1967-12-01), Scheiman et al.
patent: 3554007 (1971-01-01), Hu
patent: 3612891 (1971-10-01), Ward et al.
patent: 3753093 (1973-08-01), Gardner et al.
patent: 3834219 (1974-09-01), Brauer
patent: 3961521 (1976-06-01), Bailey et al.

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