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(11)

EP 0 379 552 A1

(12)

(43) Date of publication: 01.08.1990 Bulletin 1990/31 (21) Application number: 89907763.0 (22) Date of filing: 22.06.1989

(51) International Patent Classification (IPC):  F24F 7/ 08( . ) F24F 13/ 068( . ) (86) International application number: PCT/FI1989/000121 (87) International publication number: WO 1990/000241 (11.01.1990 Gazette 1990/02)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 30.06.1988 FI 19880003127 (71) Applicant: HALTON OY SF-47400 Kausala (FI)	(72) Inventors: VUORIMAA, Pekka SF-47400 Kausala (FI) VETOLA, Jari SF-45100 Kouvola (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)