(19)

(11)

EP 4 179 162 A1

(12)

(43) Date of publication: 17.05.2023 Bulletin 2023/20 (21) Application number: 21737504.7 (22) Date of filing: 02.07.2021

(51) International Patent Classification (IPC):  E03F 5/02(2006.01) (52) Cooperative Patent Classification (CPC): E03F 5/027; E03F 5/024 (86) International application number: PCT/NL2021/050424 (87) International publication number: WO 2022/010347 (13.01.2022 Gazette 2022/02)

(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: 09.07.2020 NL 2026036 (71) Applicant: Wavin B.V. 1118 BK Schiphol (NL)	(72) Inventor: BOXUM, Silas Rudolf 7701 BS Dedemsvaart (NL) (74) Representative: van Bouwelen, Franciscus Maria  Hoffmann Eitle B.V. Weerdestein 97 1083 GG Amsterdam 1083 GG Amsterdam (NL)