(19)

(11)

EP 1 088 260 A1

(12)

(43) Date of publication: 04.04.2001 Bulletin 2001/14 (21) Application number: 00907884.1 (22) Date of filing: 14.03.2000

(51) International Patent Classification (IPC)7: G05D 7/06, B01D 61/12, B01D 61/22 (86) International application number: PCT/IB0000/272 (87) International publication number: WO 0058/802 (05.10.2000 Gazette 2000/40)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 25.03.1999 ZA 9902313 (71) Applicant: Technology Finance Corporation (Proprietary) Limited 2196 Sandton (ZA)	(72) Inventors: FULS, Paul Fritz 0081 Pretoria (ZA) JOUBERT, André Keith,Synergetics (proprietary) 1260 Sabie (ZA) KAPP, Diederik Arnoldis 0250 Brits (ZA) (74) Representative: Barlow, Roy James  J.A. KEMP & CO.14, South SquareGray's Inn London WC1R 5LX London WC1R 5LX (GB)