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(11)

EP 1 713 601 A1

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(43) Date of publication: 25.10.2006 Bulletin 2006/43 (21) Application number: 05710378.0 (22) Date of filing: 10.02.2005

(51) International Patent Classification (IPC):  B22D 11/06(2006.01) B21B 3/00(2006.01) C22C 21/00(2006.01) B21B 1/22(2006.01) B21B 11/00(2006.01) F28F 21/08(2006.01) (86) International application number: PCT/JP2005/002532 (87) International publication number: WO 2005/077569 (25.08.2005 Gazette 2005/34)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (30) Priority: 12.02.2004 JP 2004035186 19.02.2004 US 545530 P (71) Applicant: Showa Denko K.K. Tokyo 105-8513 (JP)	(72) Inventors: YAMANOI, Tomoaki, Oyama Office, Showa Denko K. K. Tochigi 323-8678 (JP) MINAMI, Kazuhiko, Oyama Office, Showa Denko K. K. Tochigi 323-8678 (JP) (74) Representative: Viering, Hans-Martin  Patentanwälte Viering, Jentschura & Partner, Postfach 22 14 43 80504 München 80504 München (DE)