(19)

(11)

EP 0 495 904 A1

(12)

(43) Date of publication: 29.07.1992 Bulletin 1992/31 (21) Application number: 90916151.0 (22) Date of filing: 18.10.1990

(51) International Patent Classification (IPC):  B28B 1/ 40( . ) C04B 35/ 195( . ) C04B 35/ 19( . ) F23D 14/ 46( . ) (86) International application number: PCT/GB1990/001610 (87) International publication number: WO 1991/005973 (02.05.1991 Gazette 1991/10)

(84) Designated Contracting States: DE FR GB NL SE (30) Priority: 19.10.1989 GB 19890023609 (71) Applicant: MORGAN MATERIALS TECHNOLOGY LIMITED Stourport-on-Severn, Worchershire DY13 8QR (GB)	(72) Inventor: ALEXANDER, Iain, Campbell Morgan Mater. Techn.Ltd Worcestershire DY13 8QR (GB) (74) Representative: Farwell, William Robert  PHILLIPS & LEIGH 7 Staple Inn High Holborn London WC1V 7QF London WC1V 7QF (GB)