Information recording disc

Details Information recording disc Information recording disc

1986-08-08

1988-03-22

Stephan, Steven L.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

369290, G11B 2504

Patent

active

047333880

ABSTRACT:
An information recording disc is provided with a magnetic attracting member in the form of metal piece or magnetic material which serves for attracting a disc member for recording, in particular, for optical recording and reproducing of information, to a spindle of a recording and reproducing apparatus. The magnetic attracting member is held in the space of a holder which is fixedly secured to the disc without the magnetic attracting member being fixedly secured to the disc. This arrangement enables a magnetic clamping of the disc member which provides for a decrease of retardation and is suitable for miniaturization of the apparatus.

REFERENCES:
patent: 2806704 (1957-09-01), Burdett
patent: 3430966 (1969-03-01), Gregg
patent: 4322841 (1982-03-01), Borchard et al.
patent: 4477894 (1984-10-01), Clurman
patent: 4587647 (1986-05-01), Mak et al.

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