Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1987-12-11
1988-12-13
Pianalto, Bernard
Stock material or miscellaneous articles
Composite
Of inorganic material
427 48, 427128, 427289, 428900, H01F 1002
Patent
active
047910321
ABSTRACT:
A process for fabricating a magnetic recording medium such as a disk medium having a uniformly high degree of magnetic particle randomization. The process includes steps of: forming a magnetic layer by applying a magnetic liquid to a continuously running support, and randomly orienting the magnetic layer by applying an AC magnetic field thereto while the magnetic layer is wet. The randomizing step is accomplished such that the magnetic field intensity of the applied AC magnetic field is 1/10 to 1/1 of the magnetic coercive force of the magnetic particles of the magnetic layer, and the frequency (Hz) of the field is set with respect to the running rate of the magnetic layer through the magnetic field so as to form a ratio to the application rate (m/min) within a range of 1/10 to 1/1.
Komatsu Kazunori
Sato Tsunehiko
Fuji Photo Film Co. , Ltd.
Pianalto Bernard
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