(19)

(11)

EP 2 331 750 A1

(12)

(43) Date of publication: 15.06.2011 Bulletin 2011/24 (21) Application number: 08804747.7 (22) Date of filing: 25.09.2008

(51) International Patent Classification (IPC):  D21F 9/00(2006.01) D21F 3/02(2006.01) (86) International application number: PCT/EP2008/062854 (87) International publication number: WO 2010/034346 (01.04.2010 Gazette 2010/13)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (71) Applicant: Metso Paper, Inc. 00130 Helsinki (FI)	(72) Inventors: PIHKO, Riku FIN-40530 Jyväskylä (FI) PAKARINEN, Pekka FIN-40340 Jyväskylä (FI) (74) Representative: TBK  Bavariaring 4-6 80336 München 80336 München (DE)