(19)

(11)

EP 1 649 488 A2

(12)

(88) Date of publication A3: 05.01.2006 (43) Date of publication: 26.04.2006 Bulletin 2006/17 (21) Application number: 04767964.2 (22) Date of filing: 30.07.2004

(51) International Patent Classification (IPC):  H01J 49/42(1980.01) (86) International application number: PCT/GB2004/003340 (87) International publication number: WO 2005/013312 (10.02.2005 Gazette 2005/06)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL HR LT LV MK (30) Priority: 31.07.2003 GB 0317953 (71) Applicant: Reliance Precision Limited Lepton Huddersfield HD8 0LE (GB)	(72) Inventors: Burns, Donald Matthew Greetland, Halifax HX4 8AH (GB) Taylor, Stephen Liverpool L15 6UX (GB) Gibson, John Raymond Woolton, Liverpool L25 7XE (GB) (74) Representative: Harrison Goddard Foote  Belgrave Hall, Belgrave Street Leeds, LS2 8DD Leeds, LS2 8DD (GB)