(19)

(11)

EP 0 348 398 A1

(12)

(43) Date of publication: 03.01.1990 Bulletin 1990/01 (21) Application number: 88901050.0 (22) Date of filing: 27.01.1988

(51) International Patent Classification (IPC):  D21F( . ) D21F 1/ 02( . ) D21F 1/ 00( . ) (86) International application number: PCT/FI1988/000010 (87) International publication number: WO 1988/005840 (11.08.1988 Gazette 1988/18)

(84) Designated Contracting States: AT DE FR GB SE (30) Priority: 30.01.1987 FI 19870000400 30.01.1987 FI 19870000402 30.01.1987 FI 19870000403 (71) Applicant: A. AHLSTROM CORPORATION SF-29600 Karhula (FI)	(72) Inventors: HAKULIN, Bertel, Kristian SF-00150 Helsinki (FI) HENRICSON, Kaj, Olof SF-48100 Kotka (FI) KEJONEN, Minna, Kanerva SF-46800 Myllykoski (FI) NISKANEN, Toivo SF-49400 Hamina (FI) (74) Representative: Gilmour, David Cedric Franklyn, et al  POTTS, KERR & CO. 15 Hamilton Square Birkenhead Merseyside L41 6BR Birkenhead Merseyside L41 6BR (GB)