Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1984-11-16
1986-07-01
Robinson, Ellis P.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
360134, 360135, 360136, 427128, 427131, 428329, 428330, 428408, 428694, 428900, G11B 572
Patent
active
045980144
ABSTRACT:
A magnetic recording medium is disclosed. The medium comprises a non-magnetic support having provided on opposite surfaces a magnetic recording layer and a backing layer containing two types of carbon black and a binder and having a thickness of 2 .mu.m or less, one of said carbon black being fine carbon black having an average particle size of 30 to 100 m.mu. and the other of said carbon black being coarse carbon black having an average particle size of 150 to 500 m.mu., and the mixing weight ratio of said carbon black and the binder being 1:1.5 to 1:3.5.
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patent: 4414270 (1983-11-01), Miyoshi
patent: 4419406 (1983-12-01), Isobe
patent: 4451531 (1984-05-01), Isobe
patent: 4452863 (1984-06-01), Takizawa
patent: 4474843 (1984-10-01), Miyoshi
Fujiyama Masaaki
Kanazawa Minoru
Masuyama Kenichi
Miyoshi Takahito
Okutu Toshimitu
Fuji Photo Film Co. , Ltd.
Robinson Ellis P.
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