(19)

(11)

EP 4 077 822 A2

(12)

(88) Date of publication A3: 09.12.2021 (43) Date of publication: 26.10.2022 Bulletin 2022/43 (21) Application number: 20830374.3 (22) Date of filing: 18.12.2020

(51) International Patent Classification (IPC):  E03F 1/00(2006.01) (52) Cooperative Patent Classification (CPC): E03F 1/005; Y02A 10/30; Y02A 20/40 (86) International application number: PCT/NL2020/050807 (87) International publication number: WO 2021/125962 (24.06.2021 Gazette 2021/25)

(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: 20.12.2019 NL 2024531 (71) Applicant: Wavin B.V. 1118 BK Schiphol (NL)	(72) Inventors: PETERS, Rick 7701 BS Dedemsvaart (NL) VAN DER SCHEER, Marco 7701 BS Dedemsvaart (NL) JAGER, Harm Jantinus Marcel 7701 BS Dedemsvaart (NL) (74) Representative: van Bouwelen, Franciscus Maria  Hoffmann Eitle B.V. Weerdestein 97 1083 GG Amsterdam 1083 GG Amsterdam (NL)