(19)

(11)

EP 1 483 460 A1

(12)

(43) Date of publication: 08.12.2004 Bulletin 2004/50 (21) Application number: 03702232.4 (22) Date of filing: 14.02.2003

(51) International Patent Classification (IPC)7: E04C 3/00, E04C 3/06, E04G 11/50 (86) International application number: PCT/CA2003/000207 (87) International publication number: WO 2003/071046 (28.08.2003 Gazette 2003/35)

(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 SE SI SK TR (30) Priority: 20.02.2002 CA 2372358 (71) Applicant: Aluma Enterprises Inc. Downview, Ontario M3H 5S8 (CA)	(72) Inventors: BECKER, Allan, James Concord, Ontario L4K 5J4 (CA) DZIWAK, Zygmunt Mississauga, Ontario L5G 1N4 (CA) (74) Representative: Brooks, Nigel Samuel  Hill HamptonEast Meon PetersfieldHampshire GU32 1QN PetersfieldHampshire GU32 1QN (GB)