(19)

(11)

EP 0 159 327 A1

(12)

(43) Date of publication: 30.10.1985 Bulletin 1985/44 (21) Application number: 84903422.0 (22) Date of filing: 10.09.1984

(51) International Patent Classification (IPC):  F41A 33/ 00( . ) (86) International application number: PCT/AU1984/000175 (87) International publication number: WO 1985/001341 (28.03.1985 Gazette 1985/08)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 13.09.1983 AU 19830001386 (71) Applicant: THE COMMONWEALTH OF AUSTRALIA Canberra, Australian Capital Territory 2600 (AU)	(72) Inventor: THOMPSON, Ian, Lister Elizabeth East, S.A. 5112 (AU) (74) Representative: Opperman, Stuart Richard, et al  Haseltine Lake & Co. Hazlitt House 28 Southampton Buildings Chancery Lane London WC2A 1AT London WC2A 1AT (GB)