Layered magnets and methods for producing same

Details Layered magnets and methods for producing same Layered magnets and methods for producing same

2005-02-01

2005-02-01

Barrera, Ramon M. (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

C335S302000, C399S277000

Reexamination Certificate

active

06850140

ABSTRACT:
The present invention is directed to layered magnets, magnetic rolls made therefrom, methods for increasing the magnetic field strength of a ferritic magnet, methods for increasing the magnetic field strength of a magnetic roll, methods for increasing the magnetic field uniformity of a rare earth magnet, and methods for increasing the magnetic field uniformity of a magnetic roll. Layered magnets include a rare earth magnet having a magnetic field, and superposed upon the rare earth magnet, a layer of ferritic magnet bonded thereto. Layered magnets exhibit greater magnetic field strength and a substantially more uniform magnetic field.

REFERENCES:
patent: 4401960 (1983-08-01), Uchikune et al.
patent: 4638281 (1987-01-01), Baermann
patent: 4727327 (1988-02-01), Toyoshima et al.
patent: 5148138 (1992-09-01), Miyata
patent: 5920262 (1999-07-01), Copeland
patent: 5965282 (1999-10-01), Baermann
patent: 6060970 (2000-05-01), Bell
patent: 6061541 (2000-05-01), Bessette
patent: 6421519 (2002-07-01), Yamashita et al.
Perry's Chemical Engineering Handbook, 1997,Chapter 18, 29-32.

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