(19)

(11)

EP 0 031 342 A1

(12)

(43) Date of publication: 08.07.1981 Bulletin 1981/27 (21) Application number: 80901192.0 (22) Date of filing: 20.06.1980

(51) International Patent Classification (IPC):  E03F 1/ 00( . ) (86) International application number: PCT/AU1980/000024 (87) International publication number: WO 1980/002854 (24.12.1980 Gazette 1980/29)

(84) Designated Contracting States: AT DE FR NL (30) Priority: 20.06.1979 AU 19790009267 (71) Applicant: Luitjes, Gerrit Hendricus Loxton North, S.A. 5333 (AU)	(72) Inventor: Luitjes, Gerrit Hendricus Loxton North, S.A. 5333 (AU)