Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1985-05-03
1987-09-22
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record medium
In container
206444, G11B 2303
Patent
active
046959114
ABSTRACT:
A protection device for floppy diskettes is described. In some embodiments, the protection device may be installed on already existing floppy diskettes to protect them from environmental contamination when not in use or incorporated during manufacturing. Rotatable shutter assemblies are disposed on each side of the diskette and may be deployed to alternately cover and uncover the openings in the diskette jacket. In one embodiment, the shutter assemblies comprise a multi-layered structure having rotatable shutters and spacer members disposed between a bottom layer and a common top layer and located so that the assembly may be folded over an edge of a floppy diskette, thereby placing a shutter on each side of the diskette. Except where the device is folded over the edge of the floppy diskette, none of the device extends beyond the edges of the floppy diskette including the shutters, both in their positions covering such openings and in their positions uncovering such openings. The shutters are operable through a side of the disk. No modification is necessary to enable a disk drive to accommodate a floppy diskette employing the protection device of the present invention.
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patent: 4094012 (1978-06-01), Perlegos et al.
patent: 4120012 (1978-10-01), Bowers
patent: 4185314 (1980-01-01), Hatchett et al.
patent: 4471397 (1984-09-01), Cloutier
patent: 4525758 (1985-06-01), Nakagawa et al.
Miyasaka et al, "Array and Gb Logic", 2/11/82, ISSCC 82, pp. 182, 183.
Ip et al, "Nonvolatile Memories", 2/23/84, ISSCC 84, pp. 138, 139.
Sniezek Andrew L.
Tupper Robert S.
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