(19)

(11)

EP 0 796 418 A1

(12)

(43) Date of publication: 24.09.1997 Bulletin 1997/39 (21) Application number: 95942787.0 (22) Date of filing: 20.12.1995

(51) International Patent Classification (IPC):  F28D 9/ 04( . ) (86) International application number: PCT/NL1995/000434 (87) International publication number: WO 1996/019706 (27.06.1996 Gazette 1996/29)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE (30) Priority: 22.12.1994 NL 19940002190 (71) Applicant: HELPMAN INTELLECTUAL PROPERTIES B.V. 1411 GM Naarden (NL)	(72) Inventor: BERTELS, Augustinus, Wilhelmus, Maria NL-6865 CL Doorwerth (NL) (74) Representative: Schumann, Bernard Herman Johan, et al  Arnold & Siedsma, Advocaten en Octrooigemachtigden, Sweelinckplein 1 2517 GK Den Haag 2517 GK Den Haag (NL)