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(11)

EP 3 464 714 A1

(12)

(43) Date of publication: 10.04.2019 Bulletin 2019/15 (21) Application number: 17803173.8 (22) Date of filing: 23.05.2017

(51) International Patent Classification (IPC):  D21C 1/06(2006.01) D21C 3/24(2006.01) D21C 7/12(2006.01) D21C 7/06(2006.01) (86) International application number: PCT/SE2017/050555 (87) International publication number: WO 2017/204736 (30.11.2017 Gazette 2017/48)

(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: MA MD (30) Priority: 27.05.2016 SE 1650742 (71) Applicant: Valmet AB 851 94 Sundsvall (SE)	(72) Inventors: WILGOTSON, Fredrik SE-852 31 Sundsvall (SE) DEUD, Eduardo 80430-210 Curitiba-PR (BR) (74) Representative: Becker Kurig Straus  Patentanwälte Bavariastrasse 7 80336 München 80336 München (DE)