(19)

(11)

EP 4 433 643 A1

(12)

(43) Date of publication: 25.09.2024 Bulletin 2024/39 (21) Application number: 22803395.7 (22) Date of filing: 03.11.2022

(51) International Patent Classification (IPC):  D21C 7/00(2006.01) D21C 7/08(2006.01) (52) Cooperative Patent Classification (CPC): D21C 7/00; D21C 7/08 (86) International application number: PCT/SE2022/051009 (87) International publication number: WO 2023/085993 (19.05.2023 Gazette 2023/20)

(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: 15.11.2021 SE 2151392 (71) Applicant: VALMET AB 85 194 Sundsvall (SE)	(72) Inventor: ANTONSSON, Lars 865 91 Alnö (SE)