(19)

(11)

EP 1 994 337 A1

(12)

(43) Date of publication: 26.11.2008 Bulletin 2008/48 (21) Application number: 07730633.0 (22) Date of filing: 15.03.2007

(51) International Patent Classification (IPC):  F24J 3/08(2006.01) F24D 15/04(2006.01) (86) International application number: PCT/FI2007/050140 (87) International publication number: WO 2007/107629 (27.09.2007 Gazette 2007/39)

(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 MT NL PL PT RO SE SI SK TR (30) Priority: 16.03.2006 FI 20065172 (71) Applicant: Mateve OY 65280 Vaasa (FI)	(72) Inventors: PANULA, Erkki-Jussi 60200 Seinäjoki (FI) LIESKOSKI, Mauri 65100 Vaasa (FI) (74) Representative: Niemi, Hakan Henrik  Kolster Oy AB Iso Roobertinkatu 23 P.O. Box 148 00121 Helsinki 00121 Helsinki (FI)