(19)

(11)

EP 2 265 881 A1

(12)

(43) Date of publication: 29.12.2010 Bulletin 2010/52 (21) Application number: 08746234.7 (22) Date of filing: 18.04.2008

(51) International Patent Classification (IPC):  F28F 1/42(2006.01) (86) International application number: PCT/US2008/060776 (87) International publication number: WO 2009/128831 (22.10.2009 Gazette 2009/43)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (71) Applicant: Wolverine Tube, Inc. Huntsville, AL 35801 (US)	(72) Inventors: CAO, Jianying Shanghai 200131 (CN) LUO, Zhong Shanghai 200131 (CN) WU, Jian Shanghai 200131 (CN) QIU, Yalin Shanghai 200131 (CN) (74) Representative: Coyle, Philip Aidan  FRKelly 27 Clyde Road Ballsbridge Dublin 4 Dublin 4 (IE)