Powder compacting apparatus and method of producing a...

Details Powder compacting apparatus and method of producing a... Powder compacting apparatus and method of producing a...

2005-11-29

2005-11-29

Davis, Robert (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Including ventilating type hood or chamber encasing a...

C425S078000, C425S143000, C425S355000, C425S815000

Reexamination Certificate

active

06969244

ABSTRACT:
The present invention aims to prevent heating and ignition of a material powder of a rare-earth alloy while reducing the oxygen content thereof so as to improve the magnetic properties of the rare-earth magnet. A rare-earth alloy powder is compacted by using a powder compacting apparatus including: an airtight container capable of storing a rare-earth alloy powder therein; an airtight feeder box moved between a powder-filling position and a retracted position; and an airtight powder supply device capable of supplying the rare-earth alloy powder from the container into the feeder box without exposing the rare-earth alloy powder to the atmospheric air.

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patent: 6035905 (2000-03-01), Griffin
patent: 6312629 (2001-11-01), Gusack et al.
patent: 6325965 (2001-12-01), Makita et al.
Specification and Drawings for U.S. Appl. No. 09/472,247, “Process and Apparatus for Supplying Rare Earth Metal-Based Alloy Powder”, filed Dec. 27, 1999, Inventors: Seichi Kohara et al.
Specification and Drawings for U.S. Appl. No. 09/702,130, “Method for Manufacturing Rare Earth Magnet”, filed Oct. 31, 2000, Inventors: Futoshi Kuniyoshi et al.
The American Heritage College Dictionary, Houghton Mifflin Company, Boston—New York, 1997, p. 29, U.S.A..

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