Asperity burst writer

Details Asperity burst writer Asperity burst writer

1985-08-26

1987-01-06

Canney, Vincent P.

Horology: time measuring systems or devices

Plural time zones

With movable belt display

324212, 360 31, G11B 502, G11B 2736, G05F 100

Patent

active

046351396

ABSTRACT:
A glide head is used to test a rigid magnetic disk surface for projecting asperities. Using a two rail head with the read/write transducer mounted at the rear of the rail at the side of the head toward which the head is being radially advanced and skewing the head so that the trailing edge of the head approaches each track before the leading edge as the head is advanced, it is possible to write a pattern from a known position relative an event or asperity identified by a mechanical transducer associated with the head to the index location. Using a developer, it is then possible to readily identify the asperity during microscopic examination of the disk surface.

REFERENCES:
patent: 2937368 (1960-05-01), Newby
patent: 3781835 (1973-12-01), Dion et al.
patent: 4532802 (1985-08-01), Yeack-Scranton et al.

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