(19)

(11)

EP 1 963 578 A1

(12)

(43) Date of publication: 03.09.2008 Bulletin 2008/36 (21) Application number: 06820598.8 (22) Date of filing: 20.12.2006

(51) International Patent Classification (IPC):  E01C 11/08(2006.01) E01C 11/14(2006.01) (86) International application number: PCT/GB2006/004813 (87) International publication number: WO 2007/071995 (28.06.2007 Gazette 2007/26)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 21.12.2005 GB 0526060 (71) Applicant: Permaban Limited Lee Mill Industrial Estate Ivybridge Devon PL21 9GL (GB)	(72) Inventor: ARNOLD, Rodney, Malcolm Devon TQ13 9NL (GB) (74) Representative: Harrison, Ivor Stanley  Withers & Rogers LLP Goldings House 2 Hays Lane London SE1 2HW London SE1 2HW (GB)