Optical disk with a bearing ring

Details Optical disk with a bearing ring Optical disk with a bearing ring

1992-04-29

1995-09-05

Thomas, Alexander S.

Stock material or miscellaneous articles

Circular sheet or circular blank

Aperture containing

384909, 369290, 360135, G11B 5016, G11B 2302

Patent

active

054477689

ABSTRACT:
A bearing ring for an optical disk has sufficiently high firmness and satisfactory sliding properties. The ring is formed by cutting a laminate structure comprising a first layer formed of a firm film of material having a sufficiently high modulus of rigidity and a second layer formed of a film having a very low coefficient of sliding friction. The first layer is preferably a film of polyethylene terephthalate and the second layer is preferably a polyethylene having a very high molecular weight of one million or more. The second layer can also be formed of nylon 6, 6, polyacetal and fluorocarbon resins.

REFERENCES:
patent: 2951721 (1960-09-01), Asp
patent: 4331367 (1982-05-01), Trudeau et al.
patent: 4660119 (1987-04-01), Kato et al.

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