Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1986-04-11
1988-02-02
Thibodeau, Paul J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428329, 428694, 428900, G11B 570
Patent
active
047228628
ABSTRACT:
A magnetic recording medium comprising a nonmagnetic support and a magnetic recording layer provided on said support, said magnetic recording layer comprising a ferromagnetic powder dispersed in a binder, in which
H.sub.1 in terms of oersted which is a value of external magnetic field determined when a magnetic flux density of a magnetic hysteresis curve determined in the direction of orientation of the ferromagnetic powder in the magnetic recording layer in the fourth quadrant is equivalent to one-third of the maximum magnetic flux density of said magnetic hysteresis curve in the third quadrant;
H.sub.2 in terms of oersted which is a value of external magnetic field determined when a magnetic flux density of said magnetic hysteresis curve in the first quadrant is equivalent to one-third of the maximum magnetic flux density of said magnetic hysteresis curve in the first quadrant;
Hc in terms of oersted which is a coercive force of the magnetic recording layer; and
Br in terms of gauss which is a residual magnetic flux density of the magnetic recording layer,
have the relationship defined by the following inequality:
REFERENCES:
patent: 4135016 (1979-01-01), Ogawa et al.
patent: 4135031 (1979-01-01), Akashi et al.
patent: 4439486 (1984-03-01), Yamada et al.
Ogawa Hiroshi
Tamai Yasuo
Yamazaki Nobuo
Ferguson Jr. Gerald J.
Foycik, Jr. Michael J.
Fuji Photo Film Co. , Ltd.
Hoffman Michael P.
Thibodeau Paul J.
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