Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 11, 2008
Patent Application Number
10552414
Date Filed
January 29, 2004
Patent Primary Examiner
Patent abstract
At least three electromagnets are disposed along the longitudinal direction of a mold. While the electromagnets generate a vibrating magnetic field, peak positions of the vibrating magnetic field is shifted in the longitudinal direction of the mold.
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