(19)

(11)

EP 0 493 436 A1

(12)

(43) Date of publication: 08.07.1992 Bulletin 1992/28 (21) Application number: 90913775.0 (22) Date of filing: 20.09.1990

(51) International Patent Classification (IPC):  B32B 3/ 02( . ) G04F 1/ 06( . ) G07C 1/ 30( . ) G04F 1/ 00( . ) G04F 13/ 06( . ) (86) International application number: PCT/AU1990/000433 (87) International publication number: WO 1991/004520 (04.04.1991 Gazette 1991/08)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 20.09.1989 NZ 19160002307 (71) Applicant: TOTHILL, John, Compton Pullenvale, QLD (AU)	(72) Inventors: TOTHILL, Thomas, Webb Christchurch (NZ) COCKBURN, Harry, George Culverden (NZ) (74) Representative: Barlow, Roy James  J.A. KEMP & CO. 14, South Square, Gray's Inn London WC1R 5LX London WC1R 5LX (GB)