(19)

(11)

EP 0 383 894 A1

(12)

(43) Date of publication: 29.08.1990 Bulletin 1990/35 (21) Application number: 89909770.0 (22) Date of filing: 25.08.1989

(51) International Patent Classification (IPC):  F24F 13/ 10( . ) (86) International application number: PCT/FI1989/000156 (87) International publication number: WO 1990/002296 (08.03.1990 Gazette 1990/06)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 30.08.1988 FI 19880003984 (71) Applicant: HALTON OY SF-47400 Kausala (FI)	(72) Inventor: PARKKILA, Raimo SF-47400 Kausala (FI) (74) Representative: Lyndon-Stanford, Edward Willoughby Brooke  MARKS & CLERK, 57/60 Lincoln's Inn Fields London WC2A 3LS London WC2A 3LS (GB)