(19)

(11)

EP 3 212 840 A1

(12)

(43) Date of publication: 06.09.2017 Bulletin 2017/36 (21) Application number: 15856135.7 (22) Date of filing: 28.10.2015

(51) International Patent Classification (IPC):  D21C 3/00(2006.01) D21D 5/02(2006.01) (86) International application number: PCT/SE2015/051141 (87) International publication number: WO 2016/068783 (06.05.2016 Gazette 2016/18)

(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 (30) Priority: 31.10.2014 SE 1451303 (71) Applicant: Valmet AB 851 94 Sundsvall (SE)	(72) Inventors: ENGELFELDT, Andreas S-856 91 Alnö (SE) KUUSISTO, Petteri FI-28100 Pori (FI) (74) Representative: Aros Patent AB  Box 1544 751 45 Uppsala 751 45 Uppsala (SE)