Method for mechanically preparing stylus lapping discs

Details Method for mechanically preparing stylus lapping discs Method for mechanically preparing stylus lapping discs

1981-02-27

1983-01-25

Whitehead, Harold D.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

369 55, 369 71, 369126, 51325, B24B 100, G11B 300

Patent

active

043696040

ABSTRACT:
A keel-tipped stylus for playback of video information from a disc record comprises a tapering body, a constricted terminal region and shoulders joining the tapering body to the constricted terminal region. A method for preparing a deep groove plastic replica disc for use in lapping the constricted terminal region on the tip of the playback stylus is disclosed. The method includes the step of mechanically cutting a deep groove into a metal substrate surface with a diamond cutting stylus. The diamond cutting stylus has a tip having a shape complementary to the shape of the keel groove to be formed into the metal surface. During the mechanical cutting operation, the tip of the stylus is introduced into the metal surface to a depth sufficient to cut the deep groove to the desired depth across the surface of the metal substrate.

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patent: 4310915 (1982-01-01), Gunter
U.S. Patent application Ser. No. 128,871, filed 3/80, Roach et al., "Method for Preparing Keel Lapping Discs".
U.S. Patent application Ser. No. 118,088, filed 2/80, Carroll et al., "Method for Preparing Stylus Lapping Discs".

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