Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1983-07-19
1985-08-06
Pianalto, Bernard D.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
427128, 427130, 427131, 427380, 428413, 4284259, 428457, 428693, 428694, 428900, H01F 1002
Patent
active
045335826
ABSTRACT:
A storage stable, pre-selected magnetic coercivity is imparted to a recording disk having a film of heat curable magnetic coating composition thereon by curing the composition in an anaerobic atmosphere at a high temperature, and then heating, typically in air, at a lower temperature for a period of time effective to raise the coercivity to the pre-selected higher value.
DePalma Vincent M.
Ward Albert W.
International Business Machines - Corporation
Madden, Jr. Walter J.
Pianalto Bernard D.
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