(19)

(11)

EP 0 990 068 A1

(12)

(43) Date of publication: 05.04.2000 Bulletin 2000/14 (21) Application number: 99914644.2 (22) Date of filing: 09.04.1999

(51) International Patent Classification (IPC)7: D21F 3/10, D21F 3/08, D21F 5/18, B01D 39/00 (86) International application number: PCT/GB9900/931 (87) International publication number: WO 9953/136 (21.10.1999 Gazette 1999/42)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE (30) Priority: 09.04.1998 GB 9807703 (71) Applicant: SCAPA GROUP PLC Blackburn,Lancashire BB2 6AY (GB)	(72) Inventor: ASHWORTH, Timothy Noel Blackburn,Lancashire BB1 9PA (GB) (74) Representative: Middlemist, Ian Alastair et al Wilson Gunn M'Caw,41-51 Royal Exchange,Cross Street Manchester, M2 7BD Manchester, M2 7BD (GB)