(19)

(11)

EP 0 516 799 A1

(12)

(43) Date of publication: 09.12.1992 Bulletin 1992/50 (21) Application number: 92901882.0 (22) Date of filing: 19.12.1991

(51) International Patent Classification (IPC):  B22C 9/ 22( . ) (86) International application number: PCT/GB1991/002281 (87) International publication number: WO 1992/011103 (09.07.1992 Gazette 1992/17)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 21.12.1990 GB 19900027890 (71) Applicant: British Steel plc London SE1 7SN (GB)	(72) Inventors: KING, Roy 2 Elm Tree Road Sheffield S13 9BU (GB) COWLEY, Dennis Chesterfield S44 6QU (GB) WHITTON, John, Rowland 27 Lang Tree Avenue Chesterfield S41 9HW (GB) COCHRANE, Anthony, Gordon Chesterfield S43 4EX (GB) (74) Representative: Heath, Peter William Murray, et al  FRY HEATH & SPENCE The Old College 53 High Street Horley Surrey RH6 7BN Horley Surrey RH6 7BN (GB)