(19)

(11)

EP 1 841 549 A1

(12)

(43) Date of publication: 10.10.2007 Bulletin 2007/41 (21) Application number: 05823246.3 (22) Date of filing: 22.12.2005

(51) International Patent Classification (IPC):  B21D 9/15(2006.01) (86) International application number: PCT/GB2005/005050 (87) International publication number: WO 2006/067493 (29.06.2006 Gazette 2006/26)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 22.12.2004 GB 0428089 (71) Applicant: Connaught Technologies Limited Southam Warwickshire CV47 2XG (GB)	(72) Inventor: BISHOP, Timothy Eydon, Northants NN11 3PB (GB) (74) Representative: Slingsby, Philip Roy et al Page White & Farrer Bedford House John Street London, WC1N 2BF London, WC1N 2BF (GB)