(19)

(11)

EP 0 912 247 A1

(12)

(43) Date of publication: 06.05.1999 Bulletin 1999/18 (21) Application number: 97917357.0 (22) Date of filing: 18.04.1997

(51) International Patent Classification (IPC):  B02C 13/ 09( . ) B02C 13/ 282( . ) (86) International application number: PCT/GB1997/001079 (87) International publication number: WO 1997/039828 (30.10.1997 Gazette 1997/46)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 22.04.1996 GB 19960008283 (71) Applicant: Taylor Woolhouse Limited Rotherham, South Yorkshire S62 6EE (GB)	(72) Inventor: TAYLOR, Robert Wortley, Sheffield S35 7DL (GB) (74) Representative: Franks, Robert Benjamin  352 Omega Court, Cemetery Road Sheffield S11 8FT Sheffield S11 8FT (GB)