(19)

(11)

EP 1 631 409 A2

(12)

(43) Date of publication: 08.03.2006 Bulletin 2006/10 (21) Application number: 04736669.5 (22) Date of filing: 11.06.2004

(51) International Patent Classification (IPC):  B23B 1/00(1968.09) (86) International application number: PCT/GB2004/002546 (87) International publication number: WO 2004/108331 (16.12.2004 Gazette 2004/51)

(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: 11.06.2003 GB 0313470 12.09.2003 GB 0321361 (71) Applicant: CAMBRIDGE CONSULTANTS LIMITED Cambridge CB4 0DW (GB)	(72) Inventor: WEBSTER, Craig, Duncan Cambridge CB4 9XL (GB) (74) Representative: Roberts, David Leslie et al Keith W. Nash & Co., 90-92 Regent Street Cambridge CB2 1DP Cambridge CB2 1DP (GB)