(19)

(11)

EP 3 737 796 A1

(12)

(43) Date of publication: 18.11.2020 Bulletin 2020/47 (21) Application number: 19700340.3 (22) Date of filing: 07.01.2019

(51) International Patent Classification (IPC):  E01F 8/00(2006.01) E01F 15/06(2006.01) (86) International application number: PCT/EP2019/050200 (87) International publication number: WO 2019/137861 (18.07.2019 Gazette 2019/29)

(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: 10.01.2018 EP 18150973 (71) Applicant: ROCKWOOL International A/S 2640 Hedehusene (DK)	(72) Inventor: JØRGENSEN, Kristian Skovgaard 2640 Hedehusene (DK) (74) Representative: Høiberg P/S  Adelgade 12 1304 Copenhagen K 1304 Copenhagen K (DK)