(19)

(11)

EP 1 480 923 A1

(12)

(43) Date of publication: 01.12.2004 Bulletin 2004/49 (21) Application number: 03706662.8 (22) Date of filing: 05.03.2003

(51) International Patent Classification (IPC)7: C04B 35/01, F16L 59/00 (86) International application number: PCT/FI2003/000164 (87) International publication number: WO 2003/074444 (12.09.2003 Gazette 2003/37)

(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 RO (30) Priority: 06.03.2002 FI 20020434 (71) Applicant: Fläkt Woods AB 55184 Jönköping (SE)	(72) Inventor: TUOMI, Jouni FIN-20300 Turku (FI) (74) Representative: Valkeiskangas, Tapio Lassi Paavali  Oy Kolster Ab,Iso Roobertinkatu 23,P.O. Box 148 00121 Helsinki 00121 Helsinki (FI)