(19)

(11)

EP 0 833 707 A1

(12)

(43) Date of publication: 08.04.1998 Bulletin 1998/15 (21) Application number: 96920469.0 (22) Date of filing: 24.05.1996

(51) International Patent Classification (IPC):  B21D 39/ 04( . ) (86) International application number: PCT/US1996/007634 (87) International publication number: WO 1996/037318 (28.11.1996 Gazette 1996/52)

(84) Designated Contracting States: BE DE ES FR GB IE (30) Priority: 26.05.1995 US 19950452273 26.05.1995 US 19950452269 (71) Applicant: SIERRACIN CORPORATION Sylmar, California 91342-3796 (US)	(72) Inventors: HOSSEINIAN, Amir, P. Sherman Oaks, CA 91403 (US) BINFORD, John, L. Lake Elsinore, CA 92530 (US) (74) Representative: W.P. Thompson & Co.  Coopers Building, Church Street Liverpool L1 3AB Liverpool L1 3AB (GB)