Optical information recording disk

Details Optical information recording disk Optical information recording disk

1988-03-16

1990-02-20

Stephan, Steven L.

Dynamic information storage or retrieval

Storage medium structure

Adjuncts or adapters

369282, G11B 17028, G11B 1920, G11B 2300

Patent

active

049032240

ABSTRACT:
An optical information recording disk having an improved eccentricity and reduced center hole wear. A metal plate lamination hub member is inserted into and fixed in a central hole in the substrate of the disk. The metal plate lamination member is formed of a metal plate and a resin hub member having center holes dimensioned and aligned such that the center hole in the metal plate forms the center hole of the disk. The metal plate and the resin hub member are attached to one another by ultrasonic welding. The metal plate may have a hardened layer at least around its center hole.

REFERENCES:
patent: 3430966 (1969-03-01), Gregg
patent: 4210785 (1980-07-01), Huber
patent: 4616278 (1986-10-01), Yamaguchi et al.
patent: 4658383 (1987-04-01), Ohta et al.
patent: 4695910 (1987-09-01), Maruyama et al.
patent: 4785444 (1988-11-01), Nakane et al.
Revox Compact Disc Player, Audio, vol. 68, No. 9, Sep. 1984, pp. 50-54.

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