(19)

(11)

EP 1 392 937 A1

(12)

(43) Date of publication: 03.03.2004 Bulletin 2004/10 (21) Application number: 02733678.3 (22) Date of filing: 14.05.2002

(51) International Patent Classification (IPC)7: E04D 13/072 (86) International application number: PCT/SE2002/000910 (87) International publication number: WO 2002/101173 (19.12.2002 Gazette 2002/51)

(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: 17.05.2001 SE 0101735 (71) Applicant: Plannja Siba AB 570 81 Järnforsen (SE)	(72) Inventor: STRÖMBERG, Jan S-974 51 Lule (SE) (74) Representative: Aslund, Roland  Plannja AB,Malmhamnen 971 88 Lulea 971 88 Lulea (SE)