(19)

(11)

EP 4 334 526 A1

(12)

(43) Date of publication: 13.03.2024 Bulletin 2024/11 (21) Application number: 22716577.6 (22) Date of filing: 05.04.2022

(51) International Patent Classification (IPC):  D21D 1/30(2006.01) (52) Cooperative Patent Classification (CPC): D21D 1/306 (86) International application number: PCT/SE2022/050337 (87) International publication number: WO 2022/235182 (10.11.2022 Gazette 2022/45)

(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: 07.05.2021 SE 2150585 (71) Applicant: VALMET AB 85 194 Sundsvall (SE)	(72) Inventor: LINDBLOM, Thommy 129 54 Hägersten (SE)