G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.4
G11B 23/03 (2006.01) B65D 85/57 (2006.01) G11B 33/04 (2006.01)
Patent
CA 1198208
ABSTRACT OF THE DISCLOSURE High storage density information carriers,particularly optically readable video discs and digital records, can only be read error-free by a playback device when the high requirements made of freedom from warping also remain guaranteed over long storage times. A cassette is provided to support and fix an information carrier only within its central portion which is free of information tracks and,by a sufficient spacing of the information carrier in the support-free area between a bottom portion and a cover portion contact with the information carrier in this area is avoided, even given consideration of maximally-admissible warping tolerances of the storage cassette and of the information carrier.
421600
Grobecker Hermann
Heuer Werner
Nusselder Frederik B.
Zielasek Adelbert
Fetherstonhaugh & Co.
Polygram G.m.b.h.
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