Title:
METHOD FOR DEMAGNETIZING MAGNETIC POWDER
Document Type and Number:
WIPO Patent Application WO/2012/005143
Kind Code:
A1
Abstract:
In the disclosed method for demagnetizing magnetic powder: the magnetic powder is placed in a container having an opening, a pressing means is inserted into the container from the opening thereof, the magnetic powder is pressed with the pressing means so that the magnetic powder is temporarily fixed inside the container, and then the magnetic powder is demagnetized; or the magnetic powder is placed in a liquid, the liquid is solidified so that the magnetic powder is temporarily fixed in the solid, and then the magnetic powder is demagnetized. In the latter case, first the magnetic powder is placed in the liquid, the liquid is then subjected to a bubble-removal process, and then the liquid is solidified. The liquid is solidified by cooling the liquid to a temperature equal to or below the freezing point thereof.
Inventors:
SAKAMOTO JUN (JP)
Application Number:
PCT/JP2011/064790
Publication Date:
January 12, 2012
Filing Date:
June 28, 2011
Export Citation:
Assignee:
SONY CHEM & INF DEVICE CORP (JP)
SAKAMOTO JUN (JP)
SAKAMOTO JUN (JP)
International Classes:
H01F13/00
Foreign References:
| JP2001284124A | 2001-10-12 | |||
| JP2006019521A | 2006-01-19 | |||
| JPH09275005A | 1997-10-21 | |||
| JPS59107505A | 1984-06-21 | |||
| JPS59166199U | 1984-11-07 | |||
| JPH10125521A | 1998-05-15 |
Attorney, Agent or Firm:
TAJIME & TAJIME (JP)
Patent business corporation Tajime international patent firm (JP)
Patent business corporation Tajime international patent firm (JP)
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Claims: