Method of forming a magneto-optical disk hub in which the inner peripheral edge portion of the spindle opening is strengthened and made abrasion resistant
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United States of America Patent
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Feb 22, 1994
Issued Date -
N/A
app pub date -
Jan 21, 1993
filing date -
Mar 27, 1990
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An optical disc equipped with a hub having a centering hole into which a spindle shaft of a disc driving mechanism is inserted, wherein a centering hole portion of the hub is provided with a centering hole reinforcing means made of a material excellent in abrasion resistance and smoothness or a member having a central hole is formed of a resin excellent in abrasion resistance and smoothness.
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