(19)

(11)

EP 0 604 531 A1

(12)

(43) Date of publication: 06.07.1994 Bulletin 1994/27 (21) Application number: 92920069.0 (22) Date of filing: 16.09.1992

(51) International Patent Classification (IPC):  B31F 1/ 28( . ) (86) International application number: PCT/AU1992/000486 (87) International publication number: WO 1993/005957 (01.04.1993 Gazette 1993/09)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL SE (30) Priority: 17.09.1991 AU 19910008359 (71) Applicant: AMCOR LIMITED South Melbourne VIC 3205 (AU)	(72) Inventors: MCKINLAY, Peter, Robert Doncaster, VIC 3108 (AU) SHAW, Neil, William Ivanhoe, VIC 3079 (AU) (74) Representative: Brooke-Smith, Fred  Stevens, Hewlett & Perkins 1 Serjeants' Inn Fleet Street London EC4Y 1LL London EC4Y 1LL (GB)