(19)

(11)

EP 3 728 750 A1

(12)

(43) Date of publication: 28.10.2020 Bulletin 2020/44 (21) Application number: 18830472.9 (22) Date of filing: 20.12.2018

(51) International Patent Classification (IPC):  E03F 5/04(2006.01) (86) International application number: PCT/EP2018/086206 (87) International publication number: WO 2019/122134 (27.06.2019 Gazette 2019/26)

(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 Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 22.12.2017 NL 1042693 (71) Applicant: Wavin B.V. 8011 CW Zwolle (NL)	(72) Inventor: BOSHOVE, Twan 7694 AE Kloosterhaar (NL) (74) Representative: Hoffmann Eitle  Patent- und Rechtsanwälte PartmbB Arabellastraße 30 81925 München 81925 München (DE)