(19)

(11)

EP 1 297 399 A1

(12)

(43) Date of publication: 02.04.2003 Bulletin 2003/14 (21) Application number: 01931849.2 (22) Date of filing: 16.05.2001

(51) International Patent Classification (IPC)7: G05D 27/02, G05D 16/20 (86) International application number: PCT/GB0102/154 (87) International publication number: WO 0109/5048 (13.12.2001 Gazette 2001/50)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 09.06.2000 GB 0014003 (71) Applicant: Drum International Limited BradfordWest Yorkshire BD5 7YH (GB)	(72) Inventor: KELLY, Alexander Huddersfield,West Yorkshire HD4 7RL (GB) (74) Representative: Neill, Alastair William  Appleyard Lees15 Clare Road HalifaxWest Yorkshire HX1 2HY HalifaxWest Yorkshire HX1 2HY (GB)