(19)

(11)

EP 0 157 849 A1

(12)

(43) Date of publication: 16.10.1985 Bulletin 1985/42 (21) Application number: 84903672.0 (22) Date of filing: 28.09.1984

(51) International Patent Classification (IPC):  F28D 7/ 16( . ) F28F 3/ 04( . ) F28D 9/ 00( . ) (86) International application number: PCT/SE1984/000318 (87) International publication number: WO 1985/001570 (11.04.1985 Gazette 1985/09)

(84) Designated Contracting States: CH DE FR GB LI (30) Priority: 28.09.1983 SE 19830005270 (71) Applicant: FOLBEX AB S-795 00 Rättvik (SE)	(72) Inventor: BENGTSSON, Folke S-795 00 Rättvik (SE) (74) Representative: Billberg, Hans, et al  Axel Ehrners Patentbyra AB Box 10 316 S-100 55 Stockholm S-100 55 Stockholm (SE)