(19)

(11)

EP 0 555 322 A1

(12)

(43) Date of publication: 18.08.1993 Bulletin 1993/33 (21) Application number: 91919680.0 (22) Date of filing: 07.11.1991

(51) International Patent Classification (IPC):  F28G 9/ 00( . ) (86) International application number: PCT/GB1991/001959 (87) International publication number: WO 1992/008943 (29.05.1992 Gazette 1992/12)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 08.11.1990 GB 19900024315 (71) Applicants: SUTER ENVIRONMENTAL LTD. Fareham, Hants. PO14 1AR (GB) H.& M. DISINFECTION SYSTEMS LIMITED Northwich, Cheshire CW9 7TN (GB)	(72) Inventors: GILLAN, John, David Hampshire PO16 9DX (GB) HALL, Stephen, John 30 Mere Bank Davenham Cheshire CW9 8NL (GB) (74) Representative: Newby, John Ross  J.Y. & G.W. Johnson Furnival House 14/18 High Holborn London WC1V 6DE London WC1V 6DE (GB)