(19)

(11)

EP 0 158 637 A1

(12)

(43) Date of publication: 23.10.1985 Bulletin 1985/43 (21) Application number: 84900132.0 (22) Date of filing: 06.12.1983

(51) International Patent Classification (IPC):  D21D 1/ 30( . ) B02C 7/ 12( . ) (86) International application number: PCT/SE1983/000429 (87) International publication number: WO 1984/002285 (21.06.1984 Gazette 1984/15)

(84) Designated Contracting States: AT DE FR GB SE (30) Priority: 15.12.1982 SE 19820007175 (71) Applicant: SUNDS DEFIBRATOR AKTIEBOLAG S-851 94 Sundsvall (SE)	(72) Inventors: JOHANSSON, Alf, Ove, Kenneth S-852 54 Sundsvall (SE) HÖGLUND, Hans, Erik S-864 00 Matfors (SE) PETERSON, Per, Viking S-852 43 Sundsvall (SE)