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(11)

EP 4 532 812 A1

(12)

(43) Date of publication: 09.04.2025 Bulletin 2025/15 (21) Application number: 23815369.6 (22) Date of filing: 03.05.2023

(51) International Patent Classification (IPC):  D04H 1/732(2012.01) D04H 1/00(2006.01) D04H 1/492(2012.01) B65D 65/00(2006.01) D04H 1/26(2012.01) D21H 27/10(2006.01) (52) Cooperative Patent Classification (CPC): D04H 1/732; D21H 27/10; D04H 1/58; D04H 1/541; D04H 1/542; D04H 1/4258; B65D 81/1075; D21H 21/18; D21H 21/22 (86) International application number: PCT/IB2023/054591 (87) International publication number: WO 2023/233220 (07.12.2023 Gazette 2023/49)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 03.06.2022 SE 2230182 (71) Applicant: Stora Enso Oyj 00101 Helsinki (FI)	(72) Inventor: TÖRNBLOM, Maria 302 42 Halmstad (SE) (74) Representative: Steinrud, Henrik  Stora Enso AB Group Intellectual Property Box 9090 65009 Karlstad 65009 Karlstad (SE)