(19)

(11)

EP 3 921 488 A1

(12)

(43) Date of publication: 15.12.2021 Bulletin 2021/50 (21) Application number: 20712063.5 (22) Date of filing: 30.01.2020

(51) International Patent Classification (IPC):  E04F 13/08(2006.01) E04F 13/14(2006.01) (86) International application number: PCT/PL2020/000009 (87) International publication number: WO 2020/162769 (13.08.2020 Gazette 2020/33)

(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: 08.02.2019 PL 42884819 (71) Applicant: Wido-Profil - Sp. z o. o. 32-400 Myslenice (PL)	(72) Inventor: CZYZ , Michal 30-444 Liberów (PL) (74) Representative: Drelichowski, Henryk  Kancelaria Prawa Patentowego ul. Swietokrzyska 12 30-015 Kraków 30-015 Kraków (PL)