(19)

(11)

EP 0 389 605 A1

(12)

(43) Date of publication: 03.10.1990 Bulletin 1990/40 (21) Application number: 89910451.0 (22) Date of filing: 25.09.1989

(51) International Patent Classification (IPC):  F24F 7/ 08( . ) (86) International application number: PCT/FI1989/000178 (87) International publication number: WO 1990/003540 (05.04.1990 Gazette 1990/08)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 23.09.1988 FI 19880004383 (71) Applicant: HALTON OY SF-47400 Kausala (FI)	(72) Inventors: AALTO, Erkki SF-47400 Kausala (FI) PELLINEN, Teuvo SF-47400 Kausala (FI) LAURIKAINEN, Jouni SF-45150 Kouvola (FI) ASIKAINEN, Erkki SF-47400 Kausala (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)