Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1984-09-26
1986-12-02
Robinson, Ellis P.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
252 6254, 360135, 427128, 427131, 428148, 428323, 428328, 428329, 428694, 428900, 428695, G11B 570
Patent
active
046264639
ABSTRACT:
Magnetizable layer of a diskette, as in the prior art, comprises acicular magnetizable particles, alpha-Fe.sub.2 O.sub.3 particles, and head-cleaning agent particles dispersed in nonmagnetizable binder. The magnetizable layer of the novel diskette differs from prior diskettes in that the alpha-Fe.sub.2 O.sub.3 particles are acicular and comprise from 2 to 7 weight percent of said layer. Preferably the alpha-Fe.sub.2 O.sub.3 particles together with the other particles comprise from 69 to 73 percent by weight of the magnetizable layer. This allows the layer to be desirably smooth and also sufficiently porous to absorb a topical lubricant in an amount of at least 2 percent by weight of the layer. A preferred topical lubricant is a mixture of a long-chain fatty acid such as oleic acid and an ester of a long-chain fatty acid such as hexadecyl stearate.
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Fujishiro Chiaki
Kominami Mitsuhiro
Minnesota Mining and Manufacturing Company
Robinson Ellis P.
Sell Donald M.
Smith James A.
Tellekson David K.
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