Magnetic brush, inner core therefor, and method for making such

Details Magnetic brush, inner core therefor, and method for making such Magnetic brush, inner core therefor, and method for making such

1989-09-15

1991-02-05

Stephan, Steven L.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

335296, H01F 100, H01F 300

Patent

active

049908766

ABSTRACT:
A magnetic brush useful in an electrophotographic apparatus. An outer sleeve is made of non-magnetic metal. An inner core is disposed within the outer sleeve so as to permit relative rotation of the inner core and the outer sleeve. The inner core comprises a shaft, which is made of magnetic or non-magnetic metal, and a magnetic layer covering a generally cylindrical surface of the shaft. The magnetic layer consists essentially of a plasma-sprayed alloy of iron, a rare earth, and boron. The rare earth is selected from the group consisting of neodymium, praseodymium, and mixtures thereof. Neodymium is preferred. A bonding layer may be optionally provided, preferably an alloy of nickel, chromium, aluminum, and yttrium.

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