(19)

(11)

EP 0 425 626 A1

(12)

(43) Date of publication: 08.05.1991 Bulletin 1991/19 (21) Application number: 90907016.0 (22) Date of filing: 12.05.1990

(51) International Patent Classification (IPC):  B02C 4/ 42( . ) (86) International application number: PCT/EP1990/000771 (87) International publication number: WO 1990/014165 (29.11.1990 Gazette 1990/27)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 19.05.1989 IT 19890020558 (71) Applicant: OCRIM S.p.A. I-26100 Cremona CR (IT)	(72) Inventor: GINELLI, Ferruccio I-26100 Cremona (IT) (74) Representative: Forattini, Amelia, et al  c/o Internazionale Brevetti Ingg. ZINI, MARANESI & C. S.r.l. Piazza Castello 1 I-20121 Milano I-20121 Milano (IT)