(19)

(11)

EP 0 157 774 A1

(12)

(43) Date of publication: 16.10.1985 Bulletin 1985/42 (21) Application number: 83903772.0 (22) Date of filing: 05.12.1983

(51) International Patent Classification (IPC):  F24F 7/ 06( . ) B01D 46/ 00( . ) B08B 15/ 02( . ) A61C 13/ 38( . ) B01D 53/ 04( . ) A61C 19/ 00( . ) (86) International application number: PCT/AU1983/000178 (87) International publication number: WO 1984/002293 (21.06.1984 Gazette 1984/15)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 06.12.1982 AU 19820007135 (71) Applicants: RIDLEY, Michael George Hampshire (GB) WILSON, John Nort Rocks, NSW 2151 (AU)	(72) Inventors: RIDLEY, Michael George Hampshire (GB) WILSON, John Nort Rocks, NSW 2151 (AU) (74) Representative: Brooks, Nigel Samuel  Hill Hampton East Meon Petersfield Hampshire GU32 1QN Petersfield Hampshire GU32 1QN (GB)