Recorders – Record receivers and/or driving means therefor – Disc
Patent
1982-10-25
1984-09-04
Goldberg, E. A.
Recorders
Record receivers and/or driving means therefor
Disc
346131, 3461351, 346 76L, 369271, 369287, G01D 1532, G11B 516, B23B 3118
Patent
active
044700547
ABSTRACT:
An optical disc assembly for use with optical disc apparatus includes a flexible disc-shaped support. An annular retaining ring engages the support around its periphery. The support carries a record layer with an information storage region. Cooperating optical disc write/read apparatus has an annular, rotatable locating surface against which the support abuts. Annular spring means integral with the locating surface engage the retaining ring, applying a force to center the ring with respect to the axis of rotation of the locating surface, and to bring the support into a predetermined abutting force against the locating surface. This provides firm contact between the disc assembly support and the locating surface. The retaining ring holds the support in a first, predetermined circumferentially-symmetric storage tension. The abutting force of the support against the locating surface, induced by the spring means, may increase the tension in the support to a second, operating tension.
REFERENCES:
patent: 3720415 (1973-03-01), Daniels et al.
patent: 4358843 (1982-11-01), Rager
patent: 4365258 (1982-12-01), Geyer et al.
patent: 4403319 (1983-09-01), Adamek et al.
Eastman Kodak Company
Goldberg E. A.
Preston Gerald E.
Sales Milton S.
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