Plastic article or earthenware shaping or treating: apparatus – With direct application of magnetic force to manipulate...
Patent
1977-04-04
1979-04-24
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
With direct application of magnetic force to manipulate...
425 78, 425354, 4251748R, B22F 300, B30B 1104
Patent
active
041509277
ABSTRACT:
A mold for producing anisotropic permanent magnets consists of a cavity defined by a thin-walled tubular lining element closely surrounded by an electrical field coil, reinforced by a metal ring enclosing the field coil so that a magnetic field of a given strength can be generated in the cavity with less power than in the case of the conventional field coil normally positioned at a relatively greater distance from the interior of the cavity. The lining element can be composed of a non-metallic material such as a ceramic, or sintered Al.sub.2 O.sub.3.
REFERENCES:
patent: 2324645 (1943-07-01), Prehler
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patent: 3274303 (1966-09-01), Muller
patent: 3416191 (1968-12-01), Richter et al.
patent: 3555597 (1971-01-01), Meadows
patent: 3555621 (1971-01-01), Hara
patent: 3564654 (1971-02-01), Steingroever
patent: 3732056 (1973-05-01), Eddy et al.
Magnetfabrik Bonn, GmbH vormals Gewerkschaft Windhorst
Spicer, Jr. Robert L.
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