(19)

(11)

EP 0 434 696 A1

(12)

(43) Date of publication: 03.07.1991 Bulletin 1991/27 (21) Application number: 89908892.0 (22) Date of filing: 07.07.1989

(51) International Patent Classification (IPC):  D21C 1/ 06( . ) D21C 3/ 26( . ) D21C 3/ 02( . ) D21C 9/ 16( . ) (86) International application number: PCT/SE1989/000395 (87) International publication number: WO 1990/002835 (22.03.1990 Gazette 1990/07)

(84) Designated Contracting States: AT FR IT NL (30) Priority: 14.09.1988 SE 19880003244 (71) Applicant: SUNDS DEFIBRATOR INDUSTRIES AKTIEBOLAG S-851 94 Sundsvall (SE)	(72) Inventors: DANIELSSON, K., Ove S-114 45 Stockholm (SE) FALK, Bo, G., S. S-175 43 Järfälla (SE) JACKSON, Michael North Vancouver, British Columbia V7R 2E (CA) (74) Representative: Sundqvist, Hans  Sunds Defibrator Industries Aktiebolag Patents Dept. Strandbergsgatan 61 S-112 51 Stockholm S-112 51 Stockholm (SE)