Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1997-04-01
1998-07-14
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
369271, G11B 1702
Patent
active
057813752
ABSTRACT:
A disk chuck mechanism of the present invention reliably chucks a disk on an upper end surface of a cylinder by providing a short rod penetrating the cylinder, coupling a circular plate and a plate member to opposite ends of the rod, providing a biasing member such as coil springs for biasing the rod in the direction in which the rod is moved away from the cylinder, pulling the rod down from the cylinder by biasing force of the biasing member to expand a ring member having a diameter smaller than an annular groove and to fit it in the annular groove, to thereby uniformly press a side surface of a center opening of the disk with an outer peripheral surface of the cylinder.
REFERENCES:
patent: 4149207 (1979-04-01), Porter
patent: 4958839 (1990-09-01), Guzik
patent: 5014143 (1991-05-01), Mori
Heinz A. J.
Hitachi Electronics Engineering Co. Ltd.
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