(19)

(11)

EP 0 857 283 A1

(12)

(43) Date of publication: 12.08.1998 Bulletin 1998/33 (21) Application number: 97935989.0 (22) Date of filing: 25.08.1997

(51) International Patent Classification (IPC):  F24F 1/ 01( . ) F24F 13/ 072( . ) (86) International application number: PCT/SE1997/001396 (87) International publication number: WO 1998/009115 (05.03.1998 Gazette 1998/09)

(84) Designated Contracting States: BE CH DE DK FI FR GB LI LU NL PT SE (30) Priority: 26.08.1996 SE 19960003070 (71) Applicant: Stifab Farex AB 671 29 Arvika (SE)	(72) Inventor: BJÖRKLUND, Staffan S-670 35 Gunnarsberg (SE) (74) Representative: Lundin, Björn-Eric  Trelleborg AB Patents and Trade Marks Box 21024 100 31 Stockholm 100 31 Stockholm (SE)