(19)

(11)

EP 0 231 289 A1

(12)

(43) Date of publication: 12.08.1987 Bulletin 1987/33 (21) Application number: 86904730.0 (22) Date of filing: 17.07.1986

(51) International Patent Classification (IPC):  A01K 1/ 03( . ) F16B 5/ 00( . ) E04B 1/ 61( . ) (86) International application number: PCT/AU1986/000198 (87) International publication number: WO 1987/000591 (29.01.1987 Gazette 1987/03)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 19.07.1985 AU 19850001554 (71) Applicant: NATIONAL COMMODITIES AUSTRALIA PTY. LTD. North Melbourne, VIC 3051 (AU)	(72) Inventor: BOOTH, Leslie, William Brighton, VIC 3186 (AU)