(19)

(11)

EP 1 611 281 A1

(12)

(43) Date of publication: 04.01.2006 Bulletin 2006/01 (21) Application number: 04725953.6 (22) Date of filing: 06.04.2004

(51) International Patent Classification (IPC):  D21C 9/02(1968.09) D21C 11/00(1968.09) (86) International application number: PCT/FI2004/000210 (87) International publication number: WO 2004/090225 (21.10.2004 Gazette 2004/43)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL HR LT LV MK (30) Priority: 07.04.2003 FI 20030522 (71) Applicant: Stora Enso Oyj 00160 Helsinki (FI)	(72) Inventors: PIGG, Pasi FI-55800 Imatra (FI) SONNI, Hannu FI-55100 Imatra (FI) TÖRÖNEN, Marjo FI-55300 Rauha (FI) (74) Representative: Heikkinen, Esko Juhani  Berggren Oy Ab P.O. Box 16 00101 Helsinki 00101 Helsinki (FI)