(19)

(11)

EP 0 693 986 A1

(12)

(43) Date of publication: 31.01.1996 Bulletin 1996/05 (21) Application number: 94913613.0 (22) Date of filing: 15.04.1994

(51) International Patent Classification (IPC):  B24D 9/ 00( . ) B24D 15/ 02( . ) B24D 9/ 04( . ) (86) International application number: PCT/EP1994/001220 (87) International publication number: WO 1994/023899 (27.10.1994 Gazette 1994/24)

(84) Designated Contracting States: AT BE DE ES FR GB IT SE (30) Priority: 16.04.1993 GB 19930007863 (71) Applicants: CARROLL, William Edmund Mitcham Junction, Surrey CR4 4JH (GB) ALLDIS, William Duncan Warlingham, Surrey CR6 9JE (GB)	(72) Inventors: CARROLL, William Edmund Mitcham Junction, Surrey CR4 4JH (GB) ALLDIS, William Duncan Warlingham, Surrey CR6 9JE (GB) (74) Representative: Lucas, Brian Ronald  Lucas & Co. 135 Westhall Road Warlingham Surrey CR6 9HJ Warlingham Surrey CR6 9HJ (GB)