Recording disk having a non-magnetizable hub cover

Details Recording disk having a non-magnetizable hub cover Recording disk having a non-magnetizable hub cover

1992-07-21

1998-03-17

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Record medium

In container

G11B 5182, G11B 2302

Patent

active

057294143

ABSTRACT:
A recording disk having an enclosure and a central hub. The hub is made of a magnetizable metal part and a non-magnetizable cover, which substantially completely covers the magnetizable part. The cover prevents recording/reproducing errors which are caused by metal particles of the magnetizable part. The cover may be made of injection molded thermoplastic.

REFERENCES:
patent: 4654733 (1987-03-01), Kawakani et al.
patent: 4885653 (1989-12-01), Kato
patent: 4920441 (1990-04-01), Kimura et al.
patent: 4941066 (1990-07-01), Swinburne et al.
patent: 5014152 (1991-05-01), Sasaki
patent: 5241441 (1993-08-01), Yamada et al.

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