(19)

(11)

EP 0 557 394 A1

(12)

(43) Date of publication: 01.09.1993 Bulletin 1993/35 (21) Application number: 91920501.0 (22) Date of filing: 11.11.1991

(51) International Patent Classification (IPC):  B27N 3/ 04( . ) B27N 3/ 12( . ) B27N 3/ 06( . ) (86) International application number: PCT/AU1991/000515 (87) International publication number: WO 1992/008588 (29.05.1992 Gazette 1992/12)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 12.11.1990 AU 19900003298 17.04.1991 AU 19910005650 (71) Applicants: MAUDE, Derek Anthony Bayswater, VIC 3153 (AU) MAUDE, Aaltje Elisabeth Bayswater, VIC 3153 (AU)	(72) Inventors: MAUDE, Derek Anthony Bayswater, VIC 3153 (AU) MAUDE, Aaltje Elisabeth Bayswater, VIC 3153 (AU) (74) Representative: Brooke-Smith, Fred  Stevens, Hewlett & Perkins 1 Serjeants' Inn Fleet Street London EC4Y 1LL London EC4Y 1LL (GB)