Manufacture of homogeneous magnetic recording structure

Details Manufacture of homogeneous magnetic recording structure Manufacture of homogeneous magnetic recording structure

1982-08-30

1984-07-10

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

To form particulate product

252 6253, 26432818, 26433111, 360135, 428900, 525906, B02C 1800

Patent

active

044592531

ABSTRACT:
A new magnetic medium permits magnetic recording either in the longitudinal or the vertical direction. The medium, unlike prior art structures, does not require a nonmagnetic substrate. The medium is a rigid magnetic disk homogeneously prepared from ferric oxide particles and polyethersulfone in ratios and proportions that produce effective and inexpensive magnetic recording media.

REFERENCES:
patent: 3451934 (1969-06-01), Hubbard
patent: 3916038 (1975-10-01), Yamaguchi et al.
patent: 4320080 (1982-03-01), Espar et al.
patent: 4327139 (1982-04-01), Schaefer et al.
Encyclopedia of Chemical Technology, N. J. Ballingtyn, vol. 18, pp. 605-610, 843-848.
Encyclopedia of Polymer Science and Tech., R. N. Johnson, vol. 11, pp. 460-463.

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