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(11)

EP 3 436 634 A1

(12)

(43) Date of publication: 06.02.2019 Bulletin 2019/06 (21) Application number: 17775982.6 (22) Date of filing: 13.03.2017

(51) International Patent Classification (IPC):  D21D 5/28(2006.01) D21D 5/02(2006.01) D21C 7/08(2006.01) (86) International application number: PCT/SE2017/050240 (87) International publication number: WO 2017/171608 (05.10.2017 Gazette 2017/40)

(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: 30.03.2016 SE 1650410 (71) Applicant: Valmet AB 851 94 Sundsvall (SE)	(72) Inventors: ENGELFELDT, Andreas 856 53 Sundsvall (SE) HÄGGLUND, Magnus 892 92 Domsjö (SE)