(19)

(11)

EP 0 020 625 A1

(12)

(43) Date of publication: 07.01.1981 Bulletin 1981/01 (21) Application number: 79901606.0 (22) Date of filing: 07.12.1979

(51) International Patent Classification (IPC):  C21B 7/ 10( . ) F27D 1/ 12( . ) C21B 7/ 16( . ) F27D 9/ 00( . ) (86) International application number: PCT/GB1979/000207 (87) International publication number: WO 1980/001201 (12.06.1980 Gazette 1980/13)

(84) Designated Contracting States: FR (30) Priority: 08.12.1978 GB 19470077478 (71) Applicant: PEEL JONES COPPER PRODUCTS LIMITED Newport, Gwent NPT 4PG (GB)	(72) Inventor: PEEL, Eric Carlin How, Yorkshire (GB)