(19)

(11)

EP 0 290 499 A1

(12)

(43) Date of publication: 17.11.1988 Bulletin 1988/46 (21) Application number: 87906916.0 (22) Date of filing: 09.10.1987

(51) International Patent Classification (IPC):  B21C 23/ 21( . ) B21C 33/ 00( . ) (86) International application number: PCT/EP1987/000591 (87) International publication number: WO 1988/003066 (05.05.1988 Gazette 1988/10)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 31.10.1986 IT 19860022201 (71) Applicant: INNSE INNOCENTI SANTEUSTACCHIO S.p.A. I-25127 Brescia (IT)	(72) Inventors: ZURRU, Sergio I-20097 S. Donato Milanese (IT) ALBERTI, Romano I-22078 Turate (IT) (74) Representative: Perani, Aurelio, et al  c/o JACOBACCI & PERANI S.p.A Via Visconti di Modrone, 7 I-20122 Milano I-20122 Milano (IT)