(19)

(11)

EP 0 536 167 A1

(12)

(43) Date of publication: 14.04.1993 Bulletin 1993/15 (21) Application number: 91910345.0 (22) Date of filing: 29.05.1991

(51) International Patent Classification (IPC):  B21D 11/ 12( . ) B21F 1/ 00( . ) (86) International application number: PCT/GB1991/000851 (87) International publication number: WO 1992/000155 (09.01.1992 Gazette 1992/02)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 25.06.1990 GB 19900014109 (71) Applicant: PAVE AUTOMATION DESIGN AND DEVELOPMENT LIMITED Peterborough, PE1 5XL (GB)	(72) Inventor: PERNA, Anthony, Andrew Pave Automation Design and Peterborough PE1 5XL (GB) (74) Representative: Nash, Keith Wilfrid, et al  KEITH W. NASH & Co. Pearl Assurance House 90-92 Regent Street Cambridge CB2 1DP Cambridge CB2 1DP (GB)