(19)

(11)

EP 0 233 876 A1

(12)

(43) Date of publication: 02.09.1987 Bulletin 1987/36 (21) Application number: 85905497.0 (22) Date of filing: 01.11.1985

(51) International Patent Classification (IPC):  A01B 45/ 00( . ) A01C 15/ 00( . ) A01C 3/ 06( . ) A01D 90/ 02( . ) (86) International application number: PCT/AU1985/000266 (87) International publication number: WO 1986/002520 (09.05.1986 Gazette 1986/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 01.11.1984 AU 19840007945 (71) Applicant: COLSON, Milton Miles Coomera, QLD 4120 (AU)	(72) Inventor: COLSON, Milton Miles Coomera, QLD 4120 (AU)