(19)

(11)

EP 0 614 405 A1

(12)

(43) Date of publication: 14.09.1994 Bulletin 1994/37 (21) Application number: 92923611.0 (22) Date of filing: 25.11.1992

(51) International Patent Classification (IPC):  B21D 39/ 03( . ) B21J 15/ 04( . ) B21J 15/ 02( . ) (86) International application number: PCT/AU1992/000631 (87) International publication number: WO 1993/010925 (10.06.1993 Gazette 1993/14)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 27.11.1991 AU 19910009742 (71) Applicant: HENROB LIMITED Flint, Clwyd CH6 5EX (GB)	(72) Inventors: BLACKET, Stuart, Edmund Alderley, QLD 4051 (AU) FUHRMEISTER, Ralph Runcorn, QLD 4113 (AU) (74) Representative: Mock, Hans, et al  MARKS & CLERK, Sussex House, 83-85 Mosley Street Manchester M2 3LG Manchester M2 3LG (GB)