(19)

(11)

EP 3 673 123 A1

(12)

(43) Date of publication: 01.07.2020 Bulletin 2020/27 (21) Application number: 18762239.4 (22) Date of filing: 21.08.2018

(51) International Patent Classification (IPC):  E04F 15/02(2006.01) E04F 15/10(2006.01) C04B 28/00(2006.01) E04F 15/08(2006.01) E04B 1/74(2006.01) (86) International application number: PCT/EP2018/072508 (87) International publication number: WO 2019/038260 (28.02.2019 Gazette 2019/09)

(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: 21.08.2017 EP 17187145 (71) Applicant: Swisspearl Group AG 8867 Niederurnen (CH)	(72) Inventors: THOMAS, Endl 4840 Vöcklabruck (AT) FRANK, Gondermann 4810 Gmunden (CH) (74) Representative: Schmitz, Joseph  Isler & Pedrazzini AG Giesshübelstrasse 45 Postfach 1772 8027 Zürich 8027 Zürich (CH)