(19)

(11)

EP 0 141 829 A1

(12)

(43) Date of publication: 22.05.1985 Bulletin 1985/21 (21) Application number: 84901601.0 (22) Date of filing: 09.04.1984

(51) International Patent Classification (IPC):  G03D 13/ 04( . ) (86) International application number: PCT/GB1984/000121 (87) International publication number: WO 1984/004179 (25.10.1984 Gazette 1984/25)

(84) Designated Contracting States: AT BE DE FR GB NL (30) Priority: 09.04.1983 GB 19830009685 11.06.1983 GB 19830016008 13.02.1984 GB 19840003662 (71) Applicants: NEW, Harry Graham Dorridge Solihull West Midlands B93 8QE (GB) WHETTON, Robin Anthony Solihull West Midlands B93 9HL (GB)	(72) Inventors: NEW, Harry Graham Dorridge Solihull West Midlands B93 8QE (GB) WHETTON, Robin Anthony Solihull West Midlands B93 9HL (GB) (74) Representative: Craske, Stephen Allan  Craske & Co. Patent Law Chambers 15 Queens Terrace Exeter South Devon EX4 4HJ Exeter South Devon EX4 4HJ (GB)