(19)

(11)

EP 1 041 916 A1

(12)

(43) Date of publication: 11.10.2000 Bulletin 2000/41 (21) Application number: 98962551.2 (22) Date of filing: 24.12.1998

(51) International Patent Classification (IPC)7: A47L 9/14, B01D 46/02, B01D 46/42, B01D 46/18 (86) International application number: PCT/GB9803/799 (87) International publication number: WO 9933/387 (08.07.1999 Gazette 1999/27)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE (30) Priority: 24.12.1997 GB 9727165 (71) Applicant: Carver plc Brownhills,West Midlands WS8 7ES (GB)	(72) Inventors: CARVER, Leonard, John Longhope,Gloucestershire GL17 0PA (GB) WRIGHT, Alan, Thomas Codsall Wood,Wolverhampton WV8 1RQ (GB) (74) Representative: Croft, Michael John et al Wilson Gunn Skerrett,Charles House,148/9 Great Charles Street Birmingham B3 3HT Birmingham B3 3HT (GB)