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(11)

EP 4 168 625 A1

(12)

(43) Date of publication: 26.04.2023 Bulletin 2023/17 (21) Application number: 21734160.1 (22) Date of filing: 23.06.2021

(51) International Patent Classification (IPC):  D21H 19/02(2006.01) D21H 19/82(2006.01) D21H 19/08(2006.01) D21H 27/10(2006.01) (52) Cooperative Patent Classification (CPC): D21H 27/10; D21H 19/82; D21H 19/02; D21H 19/08 (86) International application number: PCT/EP2021/067213 (87) International publication number: WO 2021/260043 (30.12.2021 Gazette 2021/52)

(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: 23.06.2020 EP 20181691 (71) Applicant: SAPPI Netherlands Services B.V. 6211 AA Maastricht (NL)	(72) Inventors: DUARTE, Gustavo 6213 EJ Maastricht (NL) LOURENCO, Vera 52538 Selfkant (DE) HOLZLECHNER, Mario 8010 Graz (AT) SIMONS, Jo 3680 Maaseik (BE) (74) Representative: Schmitz, Joseph  Isler & Pedrazzini AG Giesshübelstrasse 45 Postfach 1772 8027 Zürich 8027 Zürich (CH)