(19)

(11)

EP 0 327 570 A1

(12)

(43) Date of publication: 16.08.1989 Bulletin 1989/33 (21) Application number: 87907116.0 (22) Date of filing: 29.10.1987

(51) International Patent Classification (IPC):  F21V 3/ 04( . ) H01J 61/ 35( . ) H01K 1/ 32( . ) F21V 17/ 04( . ) H01J 61/ 40( . ) (86) International application number: PCT/GB1987/000768 (87) International publication number: WO 1988/003327 (05.05.1988 Gazette 1988/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 30.10.1986 GB 19860026034 25.02.1987 GB 19870004426 (71) Applicant: COLOURCOVER LIMITED Lancashire WN6 0HQ (GB)	(72) Inventor: ROBINSON, Douglas Near Preston (GB) (74) Representative: Cardwell, Stuart Martin  Roystons Tower Building Water Street Liverpool, Merseyside L3 1BA Liverpool, Merseyside L3 1BA (GB)