×

Method of marking for deterring fraud with valuable documents

  • US 4,627,642 A
  • Filed: 09/05/1985
  • Issued: 12/09/1986
  • Est. Priority Date: 09/07/1984
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for deterring fraud with documents having monetary value comprising a substrate (1) including a predetermined signature location, including the steps of:

  • depositing on the signature location a first supporting layer of ink (2) including a pigment having a predetermined porosity with respect to the substrate;

    depositing on selected zones of the first supporting layer (2) a porous varnish layer (3), including in solution a powder enabling a fluorescence of a desired color to be obtained under ultraviolet light;

    printing a filigree pattern on selected zones of the first supporting ink layer (2) and on the varnish layer (3) by silkscreening, using a second pigmented vinyl ink (4); and

    applying an identifying signature (5) to the card using a felt-tip pen having an indelible ink wherein the porosities of the first ink layer (2) and of the layer (3) are different, and the penetration of the vinyl ink is better on the first ink layer (2) than on the varnish layer (3); and

    the adherence of the indelible ink on the first ink layer (2) is better than the adherence of the varnish layer (3) on the first ink layer (2).

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×