(19)

(11)

EP 0 378 595 A1

(12)

(43) Date of publication: 25.07.1990 Bulletin 1990/30 (21) Application number: 89904595.0 (22) Date of filing: 11.04.1989

(51) International Patent Classification (IPC):  F17D 1/ 14( . ) F22B 35/ 00( . ) F22B 27/ 00( . ) (86) International application number: PCT/GB1989/000371 (87) International publication number: WO 1989/012782 (28.12.1989 Gazette 1989/30)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 22.06.1988 GB 19880014858 (71) Applicant: CUBIT LIMITED Birmingham West Midlands, B3 2JR (GB)	(72) Inventor: HOPKINSON, Kenneth, Edward Nr. Barnsley,South Yorkshire S72 8QG (GB) (74) Representative: Lewis, Samuel Hewitt  FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 D-80801 München D-80801 München (DE)