(19)

(11)

EP 2 571 669 A1

(12)

(43) Date of publication: 27.03.2013 Bulletin 2013/13 (21) Application number: 11730033.5 (22) Date of filing: 18.05.2011

(51) International Patent Classification (IPC):  B29C 47/58(2006.01) B29C 47/48(2006.01) (86) International application number: PCT/FI2011/050454 (87) International publication number: WO 2011/144814 (24.11.2011 Gazette 2011/47)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 18.05.2010 FI 20105538 (71) Applicant: Oy KWH Pipe AB 65101 Vaasa (FI)	(72) Inventor: TAKKU, Tuomo FI-37800 Toijala (FI) (74) Representative: Sundman, Patrik Christoffer  Seppo Laine Oy Itämerenkatu 3 B 00180 Helsinki 00180 Helsinki (FI)