(19)

(11)

EP 1 623 176 A1

(12)

(43) Date of publication: 08.02.2006 Bulletin 2006/06 (21) Application number: 04729495.4 (22) Date of filing: 26.04.2004

(51) International Patent Classification (IPC):  F28F 1/30(1968.09) (86) International application number: PCT/JP2004/005988 (87) International publication number: WO 2004/097322 (11.11.2004 Gazette 2004/46)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 28.04.2003 JP 2003123837 12.06.2003 US 477746 P (71) Applicant: Showa Denko K.K. Tokyo 105-8518 (JP)	(72) Inventor: NAKAGAWA, Shintaro, c/o SHOWA DENKO K.K. Oyama-shi, Tochigi 3238678 (JP) (74) Representative: Joly, Jean-Jacques et al Cabinet Beau de Loménie 158, rue de l'Université 75340 Paris Cédex 07 75340 Paris Cédex 07 (FR)