Dynamic information storage or retrieval – Storage medium structure – Specified center hole or locating structure
Patent
1992-08-12
1994-11-29
Bertsch, Richard A.
Dynamic information storage or retrieval
Storage medium structure
Specified center hole or locating structure
369290, 369270, G11B 370
Patent
active
053696328
ABSTRACT:
An inner peripheral resin ring having a centering aperture unitarily molded with the inner periphery of a metal plate of a disc hub is given an anti-static effect to prevent build-up of a static electric charge. An inner peripheral resin ring (14) having on its center a centering aperture (17) unitarily molded with the inner periphery of the metal plate (12) of a disc hub (11) is formed by the molding process of a resin which is highly wear-resistant and relatively conductive.
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"Modern Plastics Encyclopedia '92", Oct. 1991, pp. 208-210 & 400-401.
Basichas Alfred
Bertsch Richard A.
Kananen Ronald P.
Sony Corporation
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