(19)

(11)

EP 1 628 908 A1

(12)

(43) Date of publication: 01.03.2006 Bulletin 2006/09 (21) Application number: 04707340.8 (22) Date of filing: 02.02.2004

(51) International Patent Classification (IPC):  B82B 3/00(2000.01) (86) International application number: PCT/NZ2004/000020 (87) International publication number: WO 2004/067445 (12.08.2004 Gazette 2004/33)

(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 PT RO SE SI SK TR (30) Priority: 31.01.2003 NZ 52392103 31.01.2003 NZ 52392203 (71) Applicant: INSTITUTE OF GEOLOGICAL & NUCLEAR SCIENCES LIMITED Lower Hutt 6009 (NZ)	(72) Inventor: MARKWITZ, Andreas Lower Hutt (NZ) (74) Representative: Ribeiro, James Michael  Withers & Rogers Goldings House 2 Hays Lane London SE1 2HW London SE1 2HW (GB)