Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Punching article from sheet material
Patent
1973-09-04
1977-12-13
Cooper, Jack
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Punching article from sheet material
252 6254, 252 626, 252 6261, 252 6264, 423594, C04B 3526, C04B 3536
Patent
active
040629201
ABSTRACT:
The invention is a process for manufacturing a material, a mass of finely divided particles of which an applied magnetic field can induce to change from a non-magnetized condition, in a sense of exhibiting no net external field, to a magnetized condition, in a sense of exhibiting an external field, which comprises:
REFERENCES:
patent: 3370011 (1968-02-01), Kitagawa et al.
patent: 3418161 (1968-12-01), Bauer
patent: 3425666 (1969-02-01), Lindquist et al.
patent: 3583918 (1971-06-01), Turnbull et al.
patent: 3607753 (1971-09-01), Suchoff
Chevron Research Company
Cooper Jack
Davies R. H.
Foster J. D.
Newell D. A.
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