(19)
(11) EP 0 737 595 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.12.1996 Bulletin 1996/51

(43) Date of publication A2:
16.10.1996 Bulletin 1996/42

(21) Application number: 96108494.4

(22) Date of filing: 27.04.1990
(51) International Patent Classification (IPC)6: B42D 15/10
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB IT LI LU NL SE

(30) Priority: 27.04.1989 AU PJ3915/89
31.08.1989 AU PJ6067/89

(62) Application number of the earlier application in accordance with Art. 76 EPC:
90906739.9 / 0470131

(71) Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Saint Paul, Minnesota 55133-3427 (US)

(72) Inventor:
  • Radclyffe, Edward Stanley
    Ainslie, Australian Capital Terr. 2602 (AU)

(74) Representative: Jackson, David Spence et al
REDDIE & GROSE 16, Theobalds Road
London, WC1X 8PL
London, WC1X 8PL (GB)

 
Remarks:
This application was filed on 28 - 05 - 1996 as a divisional application to the application mentioned under INID code 62.
 


(54) Security document


(57) A component bearing an image is produced by printing the image (12) on a layer (11) of a high temperature glue which has been applied to a layer of a transparent medium (10). The image is printed on the glue layer using carbon or a carbon-containing compound that does not flow when applied to the glue surface. The component consisting of transparent medium, high temperature glue and image is then bonded to a substrate (13) using a thermal bonding process to produce a laminate of the transparent medium and the substrate. The image is not distorted by the thermal bonding process, but remains clearly visible through the transparent medium. Typically the transparent medium will be a polyester film or a sheet of glass beads dispersed in glue. One or more additional layers (27) may be bonded to the substrate (13) to increase the stiffness of the product laminate.






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