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(11)

EP 3 464 712 A1

(12)

(43) Date of publication: 10.04.2019 Bulletin 2019/15 (21) Application number: 17724956.2 (22) Date of filing: 17.05.2017

(51) International Patent Classification (IPC):  D21B 1/02(2006.01) D21C 3/12(2006.01) D21C 3/06(2006.01) (86) International application number: PCT/SE2017/050514 (87) International publication number: WO 2017/204723 (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: 23.05.2016 SE 1650710 (71) Applicant: Holmen AB 114 84 Stockholm (SE)	(72) Inventors: SANDBERG, Jan Christer 617 90 Skärblacka (SE) SVENSSON RUNDLÖF, Eva Birgitta 602 34 Norrköping (SE) JOHNSSON, Claes Jonas Fredrik 616 32 ÅBY (SE) NELSSON, Erik Lennart Peter 111 39 Stockholm (SE) (74) Representative: Zacco Sweden AB  P.O. Box 5581 114 85 Stockholm 114 85 Stockholm (SE)