(19)

(11)

EP 0 221 128 A1

(12)

(43) Date of publication: 13.05.1987 Bulletin 1987/20 (21) Application number: 86902888.0 (22) Date of filing: 12.05.1986

(51) International Patent Classification (IPC):  B05C 1/ 08( . ) (86) International application number: PCT/GB1986/000259 (87) International publication number: WO 1986/006655 (20.11.1986 Gazette 1986/25)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 13.05.1985 GB 19850012021 (71) Applicant: WALLACE KNIGHT LIMITED Slough Berkshire SL1 4DB (GB)	(72) Inventor: KNIGHT, Ronald, Edward Nr. Maidenhead Berkshire (GB)