(19)

(11)

EP 4 267 813 A1

(12)

(43) Date of publication: 01.11.2023 Bulletin 2023/44 (21) Application number: 21847759.4 (22) Date of filing: 13.12.2021

(51) International Patent Classification (IPC):  E04D 13/064(2006.01) E04D 13/158(2006.01) E04D 13/072(2006.01) (52) Cooperative Patent Classification (CPC): E04D 13/158; E04D 13/0722; E04D 13/0641; E04D 13/064 (86) International application number: PCT/IB2021/061634 (87) International publication number: WO 2022/137007 (30.06.2022 Gazette 2022/26)

(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: 23.12.2020 PL 43646120 (71) Applicant: Blachotrapez Spólka z ograniczona Odpowiedzialnoscia 34-700 Rabka-Zdrój (PL)	(72) Inventor: SKAWSKA, Renata 34-700 Rabka Zdrój (PL) (74) Representative: JWP Patent & Trademark Attorneys  Sienna Center, ul. Zelazna 28/30 00-833 Warszawa 00-833 Warszawa (PL)