(19)

(11)

EP 0 209 548 A1

(12)

(43) Date of publication: 28.01.1987 Bulletin 1987/05 (21) Application number: 86900609.0 (22) Date of filing: 03.01.1986

(51) International Patent Classification (IPC):  F42B 12/ 74( . ) F42B 12/ 80( . ) (86) International application number: PCT/GB1986/000004 (87) International publication number: WO 1986/004135 (17.07.1986 Gazette 1986/17)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 03.01.1985 GB 19850000087 (71) Applicant: JOHNSON, Peter Ian Edgbaston, Birmingham B16 9HU (GB)	(72) Inventor: JOHNSON, Peter Ian Edgbaston, Birmingham B16 9HU (GB) (74) Representative: Leach, John Nigel, et al  FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 D-80801 München D-80801 München (DE)