(19)

(11)

EP 0 031 320 A1

(12)

(43) Date of publication: 08.07.1981 Bulletin 1981/27 (21) Application number: 79900680.0 (22) Date of filing: 29.06.1979

(51) International Patent Classification (IPC):  B21B 1/ 22( . ) C22C 11/ 02( . ) H01M 4/ 68( . ) B22D 25/ 04( . ) C22C 11/ 06( . ) H01M 4/ 84( . ) (86) International application number: PCT/GB1979/000108 (87) International publication number: WO 1981/000068 (22.01.1981 Gazette 1981/02)

(84) Designated Contracting States: FR (71) Applicant: CHLORIDE GROUP PUBLIC LIMITED COMPANY London SW1W 0AU (GB)	(72) Inventor: McWHINNIE, John Bolton Lancashire (GB) (74) Representative: Jennings, Nigel Robin, et al  KILBURN & STRODE 30 John Street London WC1N 2DD London WC1N 2DD (GB)