(19)

(11)

EP 0 874 922 A1

(12)

(43) Date of publication: 04.11.1998 Bulletin 1998/45 (21) Application number: 97900152.0 (22) Date of filing: 15.01.1997

(51) International Patent Classification (IPC):  D01B 3/ 06( . ) D06M 10/ 00( . ) D06L 1/ 16( . ) D06M 10/ 06( . ) (86) International application number: PCT/AU1997/000019 (87) International publication number: WO 1997/026394 (24.07.1997 Gazette 1997/32)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 16.01.1996 AU 1996PN07582 11.07.1996 AU 1996PO00963 (71) Applicant: Primary Technologies Pty. Limited Armidale, NSW 2351 (AU)	(72) Inventor: BEVEN, Peter, William Armidale, NSW 2350 (AU) (74) Representative: MacDougall, Donald Carmichael, et al  Cruikshank & Fairweather 19 Royal Exchange Square Glasgow G1 3AE, Scotland Glasgow G1 3AE, Scotland (GB)