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(11)

EP 4 569 167 A1

(12)

(43) Date of publication: 18.06.2025 Bulletin 2025/25 (21) Application number: 23753878.0 (22) Date of filing: 04.08.2023

(51) International Patent Classification (IPC):  D21H 19/20(2006.01) D21H 27/06(2006.01) A47J 36/02(2006.01) A21B 3/15(2006.01) (52) Cooperative Patent Classification (CPC): D21H 27/06; D21H 19/20 (86) International application number: PCT/EP2023/071695 (87) International publication number: WO 2024/033267 (15.02.2024 Gazette 2024/07)

(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: 09.08.2022 EP 22306201 (71) Applicant: Ahlstrom Oyj 02150 Espoo (FI)	(72) Inventors: PAQUET, Olivier 38200 Jardin (FR) ROUX, Mireille 69700 Givors (FR) (74) Representative: Hoffmann Eitle  Patent- und Rechtsanwälte PartmbB Arabellastraße 30 81925 München 81925 München (DE)