(19)

(11)

EP 0 515 459 A1

(12)

(43) Date of publication: 02.12.1992 Bulletin 1992/49 (21) Application number: 91903939.0 (22) Date of filing: 14.02.1991

(51) International Patent Classification (IPC):  G09F 7/ 22( . ) G09F 15/ 00( . ) (86) International application number: PCT/GB1991/000223 (87) International publication number: WO 1991/012604 (22.08.1991 Gazette 1991/19)

(84) Designated Contracting States: BE DE DK ES FR GB IT NL SE (30) Priority: 16.02.1990 GB 19900003533 24.08.1990 GB 19900018632 (71) Applicant: A.C. EDWARDS PLC Hertfordshire EN8 7LX (GB)	(72) Inventor: HOBBS, Michael, Anthony Woodford Green IG8 0LD (GB) (74) Representative: Beresford, Keith Denis Lewis, et al  BERESFORD & Co. 2-5 Warwick Court High Holborn London WC1R 5DJ London WC1R 5DJ (GB)