Dynamic magnetic information storage or retrieval – Record medium – Disk
Patent
1982-02-22
1984-10-30
Kilgore, Robert M.
Dynamic magnetic information storage or retrieval
Record medium
Disk
360 99, 369290, G11B 5016, G11B 582, G11B 370, G11B 584
Patent
active
044802820
ABSTRACT:
An improved magnetic flexible disk for use in data storage is provided with a stabilized locating ring about the spindle aperture thereof. The stabilized locating ring is selected from an electrically conductive material having miniscule humidital expansion characteristics at normal use temperatures. The stabilized locating ring has an inside diameter precisely equal to the outside diameter of the drive spindle on the disk drive apparatus for which the disk is designed to be utilized. The locating ring is bonded onto an existing disk which has had its central aperture punched to be slightly oversized. The improved disk is characterized by its longer usable lifetime, substantially elimination of errors in registration and increased data capacity.
REFERENCES:
patent: 3729720 (1973-04-01), Darling
patent: 3951264 (1976-04-01), Heidecker
patent: 4052750 (1977-10-01), Barber
patent: 4370689 (1983-01-01), Davies
patent: 4376963 (1983-03-01), Knoop
Brock George W.
Conner Alfred W.
Kilgore Robert M.
Schatzel Thomas E.
Verbatim Corporation
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