(19)

(11)

EP 1 831 480 A1

(12)

(43) Date of publication: 12.09.2007 Bulletin 2007/37 (21) Application number: 05819189.1 (22) Date of filing: 16.12.2005

(51) International Patent Classification (IPC):  E04F 13/08(2006.01) (86) International application number: PCT/GB2005/004894 (87) International publication number: WO 2006/064268 (22.06.2006 Gazette 2006/25)

(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: 16.12.2004 GB 0427546 08.10.2005 GB 0520498 (71) Applicant: Ibstock Brick Limited Ibstock Leicestershire LE6 1HS (GB)	(72) Inventor: DOOLEY, Alfred Manchester M25 9QB (GB) (74) Representative: Chapple, Colin Richard et al Marks & Clerk 144 New Walk Leicester LE1 7JA Leicester LE1 7JA (GB)