(19)

(11)

EP 1 581 356 A1

(12)

(43) Date of publication: 05.10.2005 Bulletin 2005/40 (21) Application number: 03780389.7 (22) Date of filing: 15.12.2003

(51) International Patent Classification (IPC)7: B21D 26/02, B21D 37/02 (86) International application number: PCT/GB2003/005455 (87) International publication number: WO 2004/054734 (01.07.2004 Gazette 2004/27)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 18.12.2002 GB 0229434 (71) Applicant: BAE Systems PLC London SW1Y 5AD (GB)	(72) Inventor: Levers, Andrew Broughton,Chester, CH4 0DR (GB)