Method for protecting a flexible record disc and disc so...

Details Method for protecting a flexible record disc and disc so... Method for protecting a flexible record disc and disc so...

G - Physics

11

B

352/32.4

G11B 7/24 (2006.01) G11B 7/00 (2006.01) G11B 23/00 (2006.01)

Patent

CA 1052906

A METHOD FOR PROTECTING A FLEXIBLE RECORD DISC AND DISC SO PROTECTED Abstract of the Disclosure A flexible record disc engraved in the form of impressions along a track located in a ring-shaped zone is protected with a second flexible disc adhering at its central portion to the non-engraved part of the record disc. In the case where read out is carried out on a stabilising air cushion, the air re- maining between the two discs is displaced by centrifugal force, so that good conditions of optical read-out are achieved.

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