(19)

(11)

EP 1 597 443 A1

(12)

(43) Date of publication: 23.11.2005 Bulletin 2005/47 (21) Application number: 04713112.3 (22) Date of filing: 20.02.2004

(51) International Patent Classification (IPC)7: E04C 2/08 (86) International application number: PCT/GB2004/000664 (87) International publication number: WO 2004/074593 (02.09.2004 Gazette 2004/36)

(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 Designated Extension States: AL LT LV MK (30) Priority: 20.02.2003 GB 0303978 (71) Applicant: ACER PRODUCTS LIMITED Upminster, Essex RM14 2SU (GB)	(72) Inventor: APPLEFORD, David Eric Epping,Essex SM16 7JD (GB) (74) Representative: Johnstone, Douglas Ian et al Baron & Warren, 19 South End, Kensington London W8 5BU London W8 5BU (GB)