(19)

(11)

EP 0 101 458 A1

(12)

(43) Date of publication: 29.02.1984 Bulletin 1984/09 (21) Application number: 83900613.0 (22) Date of filing: 14.02.1983

(51) International Patent Classification (IPC):  B01D 29/ 11( . ) (86) International application number: PCT/AU1983/000020 (87) International publication number: WO 1983/002732 (18.08.1983 Gazette 1983/19)

(84) Designated Contracting States: FR GB (30) Priority: 12.02.1982 AU 19820002687 (71) Applicant: RIS IRRIGATION SYSTEMS PTY.LTD. Elizabeth, S.A. 5112 (AU)	(72) Inventor: TUCKER, Alfred Denholm Kersbrook, S.A. 5231 (AU) (74) Representative: Allden, Thomas Stanley, et al  A.A. THORNTON & CO. Northumberland House 303-306 High Holborn London WC1V 7LE London WC1V 7LE (GB)