(19)

(11)

EP 0 020 527 A1

(12)

(43) Date of publication: 07.01.1981 Bulletin 1981/01 (21) Application number: 79901399.0 (22) Date of filing: 07.11.1979

(51) International Patent Classification (IPC):  C21B 7/ 10( . ) F27D 1/ 12( . ) F28D 15/ 02( . ) C21C 5/ 46( . ) F27D 9/ 00( . ) (86) International application number: PCT/GB1979/000182 (87) International publication number: WO 1980/001000 (15.05.1980 Gazette 1980/11)

(84) Designated Contracting States: AT DE FR GB LU NL SE (30) Priority: 07.11.1978 GB 19430045378 08.01.1979 GB 19790000624 19.06.1979 GB 19790021226 (71) Applicant: SHARP, Kenneth Copley Saltburn-by-the-Sea Yorkshire (GB)	(72) Inventor: SHARP, Kenneth Copley Saltburn-by-the-Sea Yorkshire (GB) (74) Representative: DELETED Woodin, Anthony John (GB) R. 102(2)a), deceased 00.10.1993  50 Haylands Way GB-Bedford MK41 9BU GB-Bedford MK41 9BU (GB)