Bar magnet for construction of a magnetic roller core

Details Bar magnet for construction of a magnetic roller core Bar magnet for construction of a magnetic roller core

1989-12-22

1991-05-28

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

335306, 355251, H01F 702

Patent

active

050197967

ABSTRACT:
An improved bar magnet and method of construction, and an improved magnetic core comprising an assembly of such magnets, for use in a processing station of an electrostatographic printing machine. The improved bar magnet is formed of permanent magnet material having magnetic domains therein that are magnetized along epicycloidal curve segments. The external magnetic flux density is improved over that of a conventionally-magnetized magnet. An injection mold for inducing the particular epicycloidal alignment of magnetic domains in the improved bar magnet is provided.

REFERENCES:
patent: 4354454 (1982-10-01), Nishikawa
patent: 4509031 (1985-04-01), Sakata et al.
patent: 4557582 (1985-12-01), Kan et al.
patent: 4558294 (1985-12-01), Yamashita
patent: 4580121 (1986-04-01), Ogawa
patent: 4608737 (1986-09-01), Parks et al.
patent: 4638281 (1987-01-01), Baermann
patent: 4806971 (1989-02-01), Masham
patent: 4823102 (1989-04-01), Cherian et al.

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