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(11)

EP 0 907 409 A1

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(43) Date of publication: 14.04.1999 Bulletin 1999/15 (21) Application number: 97924040.0 (22) Date of filing: 29.05.1997

(51) International Patent Classification (IPC):  B01F 7/ 00( . ) D21B 1/ 34( . ) B01F 15/ 00( . ) B01F 7/ 32( . ) D21C 9/ 10( . ) (86) International application number: PCT/FI1997/000325 (87) International publication number: WO 1997/046309 (11.12.1997 Gazette 1998/01)

(84) Designated Contracting States: AT DE FI FR SE (30) Priority: 03.06.1996 WO 1996FI00330 20.12.1996 FI 19960005137 (71) Applicant: A. Ahlström Osakeyhtiö 29600 Noormarkku (FI)	(72) Inventors: PELTONEN, Kari FIN-48400 Kotka (FI) VESALA, Reijo FIN-48300 Kotka (FI) (74) Representative: HOFFMANN - EITLE  Patent- und Rechtsanwälte Arabellastrasse 4 81925 München 81925 München (DE)