(19)

(11)

EP 0 249 608 A1

(12)

(43) Date of publication: 23.12.1987 Bulletin 1987/52 (21) Application number: 86906884.0 (22) Date of filing: 20.11.1986

(51) International Patent Classification (IPC):  B21B 31/ 18( . ) B21B 31/ 10( . ) (86) International application number: PCT/GB1986/000709 (87) International publication number: WO 1987/003228 (04.06.1987 Gazette 1987/12)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 22.11.1985 GB 19850028849 (71) Applicant: DAVY McKEE (POOLE) LIMITED Poole Dorset BH12 5AG (GB)	(72) Inventors: HOBSON, David 190, West Way Dorset BH18 9LN (GB) PEARSON, William, James 22, Furze Hill Drive Dorset BH14 8QL (GB) (74) Representative: Kirk, Geoffrey Thomas, et al  BATCHELLOR, KIRK & CO. 2 Pear Tree Court Farringdon Road London EC1R 0DS London EC1R 0DS (GB)