(19)

(11)

EP 1 131 592 A1

(12)

(43) Date of publication: 12.09.2001 Bulletin 2001/37 (21) Application number: 99949257.2 (22) Date of filing: 20.10.1999

(51) International Patent Classification (IPC)7: F28D 9/00 (86) International application number: PCT/GB9903/456 (87) International publication number: WO 0028/271 (18.05.2000 Gazette 2000/20)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 10.11.1998 GB 9824648 22.01.1999 GB 9901482 (71) Applicant: CENTRAX LIMITED Newton AbbotDevon TQ12 4SQ (GB)	(72) Inventor: BARR, Richard, Henry, Howard Torquay,Devon TQ1 2HB (GB) (74) Representative: Giles, Ashley Simon et al Haseltine Lake & Co.,Imperial House,15-19 Kingsway London WC2B 6UD London WC2B 6UD (GB)