(19)

(11)

EP 0 264 417 A1

(12)

(43) Date of publication: 27.04.1988 Bulletin 1988/17 (21) Application number: 87902637.0 (22) Date of filing: 30.04.1987

(51) International Patent Classification (IPC):  B21C 23/ 00( . ) B22D 11/ 06( . ) B21C 33/ 02( . ) (86) International application number: PCT/GB1987/000285 (87) International publication number: WO 1987/006508 (05.11.1987 Gazette 1987/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 01.05.1986 GB 19860010735 (71) Applicant: ALFORM ALLOYS LIMITED Holton Heath Poole DorsetBH16 6LF (GB)	(72) Inventor: MADDOCK, Brian Broadstone Dorset (GB) (74) Representative: Kirk, Geoffrey Thomas, et al  BATCHELLOR, KIRK & CO. 2 Pear Tree Court Farringdon Road London EC1R 0DS London EC1R 0DS (GB)