(19)

(11)

EP 0 408 623 A1

(12)

(43) Date of publication: 23.01.1991 Bulletin 1991/04 (21) Application number: 89903961.0 (22) Date of filing: 29.03.1989

(51) International Patent Classification (IPC):  B31F 1/ 28( . ) (86) International application number: PCT/AU1989/000128 (87) International publication number: WO 1989/009127 (05.10.1989 Gazette 1989/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 31.03.1988 AU 19880007541 22.04.1988 AU 19880007878 (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: Marles, Alan David, et al  Stevens, Hewlett & Perkins 1 St Augustine's Place Bristol BS1 4UD Bristol BS1 4UD (GB)