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Title:
DEMAGNETIZATION METHOD OF MAGNETIC POWDER
Document Type and Number:
Japanese Patent JP2012018967
Kind Code:
A
Abstract:

To provide a method for efficiently demagnetizing magnetic powder.

During demagnetization, magnetic powder is fed into a cylindrical container having an opening. Then, pressing means is inserted into the container from the opening of the container. The magnetic powder in the container is pressed by the pressing means thus inserted so that the relative position relationship between particles of the magnetic powder does not vary. Alternatively, the magnetic powder is fed into liquid and the liquid is solidified so that the relative position relationship of the magnetic powder particles does not vary.


Inventors:
SAKAMOTO ATSUSHI
Application Number:
JP2010153848A
Publication Date:
January 26, 2012
Filing Date:
July 06, 2010
Export Citation:
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Assignee:
SONY CHEM & INF DEVICE CORP
International Classes:
H01F13/00; H01F1/147; H01F1/20
Domestic Patent References:
JPS59107505A1984-06-21
JPS59166199U1984-11-07
JPH10125521A1998-05-15
JP2001284124A2001-10-12
JP2006019521A2006-01-19
JPH09275005A1997-10-21
JP2003034879A2003-02-07
JP2006052460A2006-02-23
JP2009522716A2009-06-11
JPS59107505A1984-06-21
JPS59166199U1984-11-07
JPH10125521A1998-05-15
Attorney, Agent or Firm:
Taji U.S. Patent Office