Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Patent
1979-07-27
1982-12-21
Silverman, Stanley S.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
252 6254, 252 6256, 428329, 428694, 428900, 360134, G11B 570
Patent
active
043649882
ABSTRACT:
An improved magnetic recording medium is disclosed, particularly a magnetic tape suitable for sound recording and video recording, which comprises as a recording element a mixture of cobalt-containing iron oxide magnetic particles consisting essentially of ferromagnetic iron oxide particles containing cobalt and optionally a divalent iron in the most outer layer thereof, and .gamma.-ferric oxide particles in the ratio of 10:90 to 50:50 by weight, said mixture of cobalt-containing iron oxide magnetic particles and .gamma.-ferric oxide particles being applied to a substrate (e.g. a polyester film) with a binding agent. The magnetic recording medium has excellent electromagnetic transducing properties and improved charging properties and is useful for conventional magnetic recording apparatus used at normal position with high sensitivity in wide range of frequency.
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Andoh Haruo
Ishida Hikaru
Kato Akira
Kitaoka Susumu
Sueyoshi Toshinobu
Hitachi Maxell Ltd.
Silverman Stanley S.
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