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US 4,544,977 AGranted
Magnetic disc device
AssigneeSony Corporation
InventorsKazuo Ozawa, Tetsuo Sawa
Life of this patent
Estimating the term…
Abstract
A flexible magnetic disc cassette contains a flexible magnetic disc which is driven by a shaft associated with a driving device. The disc is contained within a cover having an upper half and lower half. An anti-wearing member is attached on an inner surface of the upper half of the cover for abutment with the driving device shaft so as to correct warpage of the upper half of the cover.
Claims5
A magnetic disc cassette formed of a flexible magnetic disc received on a driving mechanism having a shaft associated therewith, comprising:
- a cover having upper and lower walls closely spaced to a flexible magnetic disc contained within the cover;
- a center core attached at a center of said flexible magnetic disc, said center core having a central aperture with a corresponding aperture in the lower wall of said disc cassette positioned for access to said magnetic disc center core;
- said shaft being positioned through the aperture of said lower wall of the cassette and through the central aperture of said center core, and an end of said shaft abutting against an inner surface of the upper wall of the cassette when the cassette is in an operating position on the driving mechanism;
- and
- an anti-wearing member attached at a portion of the inner surface thereof where said end of said shaft is brought in contact therewith.
2 more elements
Dependencies are inferred from the claim text.