(19)

(11)

EP 0 523 134 A1

(12)

(43) Date of publication: 20.01.1993 Bulletin 1993/03 (21) Application number: 91907385.0 (22) Date of filing: 28.03.1991

(51) International Patent Classification (IPC):  B21D 39/ 03( . ) (86) International application number: PCT/AU1991/000120 (87) International publication number: WO 1991/015316 (17.10.1991 Gazette 1991/24)

(84) Designated Contracting States: DE FR GB IT SE (30) Priority: 03.04.1990 AU 19900009434 (71) Applicant: WEBB, Edward, Leslie, Theodore Helensburgh, NSW 2508 (AU)	(72) Inventor: WEBB, Edward, Leslie, Theodore Helensburgh, NSW 2508 (AU) (74) Representative: Coyle, Philip Aidan  F. R. KELLY & CO. 27 Clyde Road Ballsbridge Dublin 4 Dublin 4 (IE)