(19)

(11)

EP 0 904 182 A1

(12)

(43) Date of publication: 31.03.1999 Bulletin 1999/13 (21) Application number: 97921840.0 (22) Date of filing: 30.04.1997

(51) International Patent Classification (IPC):  B28C 7/ 16( . ) (86) International application number: PCT/EP1997/002226 (87) International publication number: WO 1997/040969 (06.11.1997 Gazette 1997/47)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 30.04.1996 IT 1996MI00840 (71) Applicant: Cifa S.P.A. 20026 Novate Milanese, Milano (IT)	(72) Inventors: ARPINI, Roberto I-22070 Rovello Porro (IT) FRACCAPANI, Ivano I-20092 Cinisello Balsamo (IT) MORETTI, Giorgio I-21040 Gerenzano (IT) (74) Representative: Vatti, Paolo, Dr. Ing., et al  Fumero Studio Consulenza Brevetti S.n.c., Franz-Josef-Strasse 38 80801 München 80801 München (DE)