Magnetic recording disc having tensioned and elastically-support

Details Magnetic recording disc having tensioned and elastically-support Magnetic recording disc having tensioned and elastically-support

1986-07-28

1989-03-14

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

Disk

G11B 582

Patent

active

048129399

ABSTRACT:
A magnetic recording disc having a rigid substrate disc is provided with an annular recess defined between inner and outer peripheral bonding rings. One or more annular elastic discs having a thickness slightly larger than the depth of the recess is placed therein. A flexible disc sheet is placed over the arrangement and held tight against the peripheral bonding rings while the inner and outer edges of the flexible disc sheet are bonded to the bonding rings. As a result, the flexible disc sheets are constantly tensioned as the elastic discs exert constant expansion pressure on the non-exposed surface of the flexible disc sheets. The recording and reproducing regions of the disc are, therefore, elastically supported by the elastic disc from below.

REFERENCES:
patent: 3805292 (1974-04-01), Hashiguchi et al.
patent: 4555716 (1985-11-01), Odawara
patent: 4623570 (1986-11-01), Alexander et al.
patent: 4631609 (1986-12-01), Erickson et al.

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