(19)

(11)

EP 0 055 737 A1

(12)

(43) Date of publication: 14.07.1982 Bulletin 1982/28 (21) Application number: 81901927.0 (22) Date of filing: 08.07.1981

(51) International Patent Classification (IPC):  F28D 7/ 02( . ) F28D 7/ 12( . ) (86) International application number: PCT/NO1981/000030 (87) International publication number: WO 1982/000343 (04.02.1982 Gazette 1982/04)

(84) Designated Contracting States: AT CH DE FR GB LI LU NL SE (30) Priority: 11.07.1980 NO 19800002084 (71) Applicants: BORG, Bjorn N-Oslo 9 (NO) HOLEN, Reidar N-Oslo 5 (NO)	(72) Inventors: BORG, Bjorn N-Oslo 9 (NO) HOLEN, Reidar N-Oslo 5 (NO)