(19)

(11)

EP 0 612 274 A1

(12)

(43) Date of publication: 31.08.1994 Bulletin 1994/35 (21) Application number: 92924269.0 (22) Date of filing: 04.11.1992

(51) International Patent Classification (IPC):  B21B 1/ 08( . ) (86) International application number: PCT/US1992/009471 (87) International publication number: WO 1993/008937 (13.05.1993 Gazette 1993/12)

(84) Designated Contracting States: AT BE DE DK FR GB IE IT LU MC NL SE (30) Priority: 04.11.1991 US 19910787683 (71) Applicant: STRUCTURAL METALS, INC. Seguin, TX 78155 (US)	(72) Inventors: MATSUO, Giichi Sakae-ku, Yokohama (JP) SAKAI, Akira Yokosuka (JP) ELLEY, Dayton, W. McQueeney, TX 78123 (US) RAINS, Jimmy, Jeral Seguin, TX 78155 (US) (74) Representative: Sorrell, Terence Gordon  Fitzpatricks, Cardinal Court, 23, Thomas More Street London E1 9YY London E1 9YY (GB)