(19)

(11)

EP 1 346 185 A1

(12)

(43) Date of publication: 24.09.2003 Bulletin 2003/39 (21) Application number: 01999779.0 (22) Date of filing: 04.12.2001

(51) International Patent Classification (IPC)7: F28F 13/12, F28D 9/00 (86) International application number: PCT/FI0101/053 (87) International publication number: WO 0204/6679 (13.06.2002 Gazette 2002/24)

(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: 04.12.2000 FI 20002648 (71) Applicant: OY LPM Group Ltd 79480 Leppävirta (FI)	(72) Inventors: KOPONEN, Hannu FIN-79480 Kangaslampi (FI) HYVÄRINEN, Jukka FIN-78210 Varkaus (FI) STRANDEN, Petri FIN-79100 Leppävirta (FI) (74) Representative: Pitkänen, Hannu Alpo Antero  Patent Agency Pitkänen Oy,P.O. Box 1188 70211 Kuopio 70211 Kuopio (FI)