(19)

(11)

EP 4 045 707 A1

(12)

(43) Date of publication: 24.08.2022 Bulletin 2022/34 (21) Application number: 20800228.7 (22) Date of filing: 14.10.2020

(51) International Patent Classification (IPC):  D21F 3/08(2006.01) D21G 1/02(2006.01) (52) Cooperative Patent Classification (CPC): D21F 3/08; D21G 1/0233 (86) International application number: PCT/FI2020/050679 (87) International publication number: WO 2021/074492 (22.04.2021 Gazette 2021/16)

(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: 15.10.2019 FI 20195889 19.05.2020 FI 20205503 (71) Applicant: Valmet Technologies Oy 02150 Espoo (FI)	(72) Inventors: TURUNEN, Jani 02150 Espoo (FI) HYTÖNEN, Pertti 02150 Espoo (FI) (74) Representative: Berggren Oy  P.O. Box 16 Eteläinen Rautatiekatu 10A 00101 Helsinki 00101 Helsinki (FI)