(19)

(11)

EP 0 598 807 A1

(12)

(43) Date of publication: 01.06.1994 Bulletin 1994/22 (21) Application number: 92917661.0 (22) Date of filing: 25.06.1992

(51) International Patent Classification (IPC):  D21F 1/ 02( . ) D21F 1/ 76( . ) D21F 1/ 66( . ) (86) International application number: PCT/SE1992/000469 (87) International publication number: WO 1993/004234 (04.03.1993 Gazette 1993/06)

(84) Designated Contracting States: AT DE ES FR SE (30) Priority: 16.08.1991 SE 19910002370 (71) Applicant: SUNDS DEFIBRATOR INDUSTRIES AKTIEBOLAG S-851 94 Sundsvall (SE)	(72) Inventor: LINDSTRÖM, Alf S-863 00 Sundsbruk (SE) (74) Representative: Sundqvist, Hans  Sunds Defibrator Industries Aktiebolag Patents Dept. Strandbergsgatan 61 S-112 51 Stockholm S-112 51 Stockholm (SE)