(19)

(11)

EP 1 156 904 A2

(12)

(88) Date of publication A3: 25.01.2001 (43) Date of publication: 28.11.2001 Bulletin 2001/48 (21) Application number: 00907781.9 (22) Date of filing: 03.03.2000

(51) International Patent Classification (IPC)7: B24C 7/00, B65G 53/30 (86) International application number: PCT/GB0000/763 (87) International publication number: WO 0052/679 (08.09.2000 Gazette 2000/36)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 03.03.1999 GB 9904914 (71) Applicant: B.H.R. Group Limited Cranfield,Bedford MK43 0AJ (GB)	(72) Inventor: MILLER, Donald Stuart Harrold,Bedfordshire (GB) (74) Representative: Foster, Mark Charles  Edward Evans BarkerClifford's Inn,Fetter Lane London EC4A 1BZ London EC4A 1BZ (GB)