(19)

(11)

EP 0 925 127 A2

(12)

(43) Date of publication: 30.06.1999 Bulletin 1999/26 (21) Application number: 97939019.0 (22) Date of filing: 04.09.1997

(51) International Patent Classification (IPC):  B21D 5/ 08( . ) (86) International application number: PCT/GB1997/002364 (87) International publication number: WO 1998/009744 (12.03.1998 Gazette 1998/10)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 05.09.1996 GB 19960018479 (71) Applicant: Acorn Engineering (Guildford) Limited Guildford, Surrey GU1 1RU (GB)	(72) Inventor: NORKETT, John, Christopher, Acorn Engineering Ltd Surrey GU1 1RU (GB) (74) Representative: Downing, Michael Philip, et al  Fry Heath & Spence, The Old College, 53 High Street Horley, Surrey RH6 7BN Horley, Surrey RH6 7BN (GB)