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(11)

EP 0 254 733 A1

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(43) Date of publication: 03.02.1988 Bulletin 1988/05 (21) Application number: 87900820.0 (22) Date of filing: 21.01.1987

(51) International Patent Classification (IPC):  F24F( . ) F24F 13/ 075( . ) F24F 13/ 06( . ) (86) International application number: PCT/FI1987/000010 (87) International publication number: WO 1987/004507 (30.07.1987 Gazette 1987/17)

(84) Designated Contracting States: BE DE FR GB LU NL SE (30) Priority: 23.01.1986 FI 19860000333 (71) Applicant: HALTON OY SF-47400 Kausala (FI)	(72) Inventors: AALTO, Erkki SF-47400 Kausala (FI) RANTANEN, Pertti, A. SF-47400 Kausala (FI) KOHTANIEMI, Timo Ummeljoki 2pp. (FI) (74) Representative: Lyndon-Stanford, Edward Willoughby Brooke, et al  MARKS & CLERK, 57/60 Lincoln's Inn Fields London WC2A 3LS London WC2A 3LS (GB)