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(11)

EP 2 367 667 A2

(12)

(88) Date of publication A3: 29.07.2010 (43) Date of publication: 28.09.2011 Bulletin 2011/39 (21) Application number: 09748311.9 (22) Date of filing: 29.10.2009

(51) International Patent Classification (IPC):  B29C 41/02(2006.01) B29C 41/48(2006.01) E03F 5/04(2006.01) B29C 41/04(2006.01) E03F 5/02(2006.01) F16L 9/12(2006.01) (86) International application number: PCT/EP2009/064327 (87) International publication number: WO 2010/049510 (06.05.2010 Gazette 2010/18)

(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 MK MT NL NO PL PT RO SE SI SK SM TR Designated Extension States: RS (30) Priority: 29.10.2008 NL 1036127 24.07.2009 NL 1037148 (71) Applicant: Wavin B.V. 8011 CW Zwolle (NL)

(72) Inventors: VAN DIJK, Berend Jan NL-7777 ST Schuinesloot (NL) ELZINK, Willem Johan NL-7701 LD Dedemsvaart (NL) MADSEN, Frede DK-8450 Hammel (DK) ALFERINK, Franciscus Johannes Maria NL-8106 AE Marienheem (NL) JAGER, Harm Jantinus Marcel NL-7676 AG Westerhaar-Vriezenveensewijk (NL) BRÜMMER, Günter Bernhard 49740 Haselünne (DE) (74) Representative: HOFFMANN EITLE  Patent- und Rechtsanwälte Arabellastraße 4 81925 München 81925 München (DE)