(19)

(11)

EP 0 757 610 A1

(12)

(43) Date of publication: 12.02.1997 Bulletin 1997/07 (21) Application number: 95916797.0 (22) Date of filing: 28.04.1995

(51) International Patent Classification (IPC):  B24C 1/ 04( . ) B24C 7/ 00( . ) (86) International application number: PCT/GB1995/000979 (87) International publication number: WO 1995/029792 (09.11.1995 Gazette 1995/48)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI NL PT SE (30) Priority: 28.04.1994 GB 19940008385 14.07.1994 GB 19940014243 (71) Applicant: B.H.R. GROUP LIMITED Bedford MK43 0AJ (GB)	(72) Inventor: MILLER, Donald, Stuart Bedford MK43 0AJ (GB) (74) Representative: Cline, Roger Ledlie  EDWARD EVANS & CO. Chancery House 53-64 Chancery Lane London WC2A 1SD London WC2A 1SD (GB)