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(11)

EP 0 939 842 A1

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(43) Date of publication: 08.09.1999 Bulletin 1999/36 (21) Application number: 97927534.0 (22) Date of filing: 29.05.1997

(51) International Patent Classification (IPC):  D21F 1/ 02( . ) D21F 9/ 00( . ) (86) International application number: PCT/SE1997/000921 (87) International publication number: WO 1997/047804 (18.12.1997 Gazette 1998/02)

(84) Designated Contracting States: AT DE FI FR GB IT SE (30) Priority: 12.06.1996 SE 19960002347 (71) Applicant: Valmet-Karlstad AB 651 15 Karlstad (SE)	(72) Inventors: HARALDSSON, N., Ulf, A. S-654 63 Karlstad (SE) LINDEN, Anders, T. S-652 29 Karlstad (SE) KLERELID, Ingvar, B., E. S-653 42 Karlstad (SE) TÖRNEFALK, Louise, M. S-652 20 Karlstad (SE) (74) Representative: Andrén, Bertil  VALMET-KARLSTAD AB Patent Department Box 1014 651 15 Karlstad 651 15 Karlstad (SE)