(19)

(11)

EP 0 198 822 A1

(12)

(43) Date of publication: 29.10.1986 Bulletin 1986/44 (21) Application number: 84903976.0 (22) Date of filing: 02.11.1984

(51) International Patent Classification (IPC):  B24B 41/ 04( . ) B24B 5/ 40( . ) B24B 5/ 06( . ) B24B 41/ 00( . ) (86) International application number: PCT/GB1984/000373 (87) International publication number: WO 1985/002140 (23.05.1985 Gazette 1985/12)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 07.11.1983 US 19830548931 (71) Applicants: YUI, George Michael Mississauga Ontario L5H 2L9 (CA) ASQUITH, Anthony Waterloo, Ontario N2T 1B7 (CA)	(72) Inventor: YUI, George Michael Ontario L5H 2L9 (CA) (74) Representative: Hayward, Denis Edward Peter, et al  Lloyd Wise, Tregear & Co. Norman House 105-109 Strand London WC2R 0AE London WC2R 0AE (GB)