(19)

(11)

EP 1 255 899 A1

(12)

(43) Date of publication: 13.11.2002 Bulletin 2002/46 (21) Application number: 01951155.9 (22) Date of filing: 19.01.2001

(51) International Patent Classification (IPC)7: E04B 2/86 (86) International application number: PCT/CA0100/054 (87) International publication number: WO 0105/9227 (16.08.2001 Gazette 2001/33)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 11.02.2000 CA 2298170 22.06.2000 CA 2312158 (71) Applicant: Polyform A.G.P. Inc. Grandy,Québec J2G 3Z3 (CA)	(72) Inventor: BELIVEAU, Jean-Louis Magog, Québec J1X 3W4 (CA) (74) Representative: Hulse, Thomas Arnold et al Hulse & Co,St. James House, 8th Floor,Vicar Lane Sheffield S1 2EX Sheffield S1 2EX (GB)