(19)

(11)

EP 1 613 900 A1

(12)

(43) Date of publication: 11.01.2006 Bulletin 2006/02 (21) Application number: 04726544.2 (22) Date of filing: 08.04.2004

(51) International Patent Classification (IPC):  F24F 13/02(1968.09) (86) International application number: PCT/GB2004/001592 (87) International publication number: WO 2004/094922 (04.11.2004 Gazette 2004/45)

(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: 16.04.2003 GB 0308825 (71) Applicant: Verplas Limited Blackhill, Verwood, Dorset BH31 6HA (GB)	(72) Inventor: SELLWOOD, Ian Rockford, Ringwood, Hampshire BH24 3NA (GB) (74) Representative: Grey, Ian Michael et al Venner Shipley LLP 20 Little Britain London EC1A 7DH London EC1A 7DH (GB)