Method of positioning disk-shaped medium
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United States of America Patent
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Dec 4, 2007
Grant Date -
Feb 26, 2004
app pub date -
Aug 22, 2003
filing date -
Aug 26, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
The method of positioning a disk-shaped medium is capable of precisely positioning the center of the disk-shape medium with respect to a center of a rotary shaft. The method comprises the steps of: inserting a cylindrical hub into a center hole of the disk-shaped medium; and covering a hub adaptor, which is eccentrically fixed to a rotary shaft, with the hub so as to position the disk-shaped medium on the rotary shaft. Directions of eccentricity of the disk-shaped medium, the hub and a hub unit are defined on the basis of amount of eccentricity between the disk-shaped medium and the hub, that between the hub and the hub adaptor and that between the hub adaptor and the rotary shaft.
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