(19)

(11)

EP 1 929 105 A1

(12)

(43) Date of publication: 11.06.2008 Bulletin 2008/24 (21) Application number: 06779121.0 (22) Date of filing: 11.08.2006

(51) International Patent Classification (IPC):  E04G 21/32(2006.01) (86) International application number: PCT/GB2006/002998 (87) International publication number: WO 2007/020395 (22.02.2007 Gazette 2007/08)

(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: 19.08.2005 GB 0517083 18.07.2006 GB 0614265 (71) Applicant: ALSAMEX PRODUCTS LIMITED Pixmore Avenue, Letchworth, Hertfordshire SG6 1JT (GB)	(72) Inventor: RATCLIFFE, Derek, John Buckinghamshire HP9 2DG (GB) (74) Representative: Hector, Annabel Mary et al fJ CLEVELAND 40-43 Chancery Lane London WC2A 1JQ London WC2A 1JQ (GB)