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(11)

EP 2 841 644 A1

(12)

(43) Date of publication: 04.03.2015 Bulletin 2015/10 (21) Application number: 12875491.8 (22) Date of filing: 27.04.2012

(51) International Patent Classification (IPC):  D21F 1/00(2006.01) D21F 11/04(2006.01) (86) International application number: PCT/FI2012/050419 (87) International publication number: WO 2013/160528 (31.10.2013 Gazette 2013/44)

(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 (71) Applicant: Valmet Technologies, Inc. 02150 Espoo (FI)	(72) Inventor: SALOJÄRVI, Jussi FI-40520 Jyväskylä (FI) (74) Representative: TBK  Bavariaring 4-6 80336 München 80336 München (DE)