(19)

(11)

EP 1 516 095 A1

(12)

(43) Date of publication: 23.03.2005 Bulletin 2005/12 (21) Application number: 03740726.9 (22) Date of filing: 16.06.2003

(51) International Patent Classification (IPC)7: E04F 15/10, E04F 15/02, D06N 7/00 (86) International application number: PCT/GB2003/002563 (87) International publication number: WO 2003/106783 (24.12.2003 Gazette 2003/52)

(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: 14.06.2002 GB 0213686 (71) Applicant: ALTRO LIMITED Letchworth,Hertfordshire SG6 1NW (GB)	(72) Inventor: GARDNER, Donald Paul Ware,Hertfordshire SG12 7JT (GB) (74) Representative: Peel, James Peter  Barker Brettell,10-12 Priests Bridge London SW15 5JE London SW15 5JE (GB)