(19)

(11)

EP 4 136 031 A1

(12)

(43) Date of publication: 22.02.2023 Bulletin 2023/08 (21) Application number: 21789589.5 (22) Date of filing: 15.04.2021

(51) International Patent Classification (IPC):  B65D 5/22(2006.01) B65D 81/38(2006.01) B65D 5/44(2006.01) (52) Cooperative Patent Classification (CPC): B65D 5/22; B65D 81/3848; B65D 5/4604 (86) International application number: PCT/IB2021/053106 (87) International publication number: WO 2021/209939 (21.10.2021 Gazette 2021/42)

(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: 15.04.2020 SE 2050429 (71) Applicant: Stora Enso Oyj 00101 Helsinki (FI)	(72) Inventor: JANSSON, Ulrika 51131 Örby (SE) (74) Representative: Steinrud, Henrik  Stora Enso AB Group Intellectual Property Box 9090 65009 Karlstad 65009 Karlstad (SE)