(19)

(11)

EP 3 874 089 A1

(12)

(43) Date of publication: 08.09.2021 Bulletin 2021/36 (21) Application number: 19877758.3 (22) Date of filing: 29.08.2019

(51) International Patent Classification (IPC):  D21B 1/34(2006.01) D21C 9/10(2006.01) B01F 7/12(2006.01) (86) International application number: PCT/SE2019/050808 (87) International publication number: WO 2020/091640 (07.05.2020 Gazette 2020/19)

(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: 30.10.2018 SE 1851348 (71) Applicant: VALMET AB 851 94 Sundsvall (SE)	(72) Inventors: LÖFGREN, Mikael 856 53 Sundsvall (SE) ERIKSSON, Niklas 865 31 Alnö (SE)