Claims
- 1. A security document having a security element comprising a transparent carrier film, said transparent carrier film including at least one electrically conductive metal layer, the metal layer being provided with recesses in the form of indicia visually readable at least in transmitted light, and said transparent carrier film further including a magnetic substance disposed in selected partial areas having gaps therebetween on top of the metal layer with said indica being located in said gaps, wherein said magnetic substance is readable by machine and said indicia are readable by visual inspection.
- 2. The security document of claim 1, in which the security element is a thread and the visually readable indicia and the machine testable substance are disposed alternatingly in the longitudinal direction of the direction of the security element.
- 3. The security document of claim 1, in which the machine testable substance is disposed symmetrically on opposite sides of the visually readable indicia.
- 4. A security document having a security element comprising a transparent carrier film which is provided on a surface thereof with a machine magnetic substance and at least one electrically conductive metal layer which is disposed on top of the machine testable substance, the metal layer and the machine testable substance including congruent recesses formed therein in the form of indicia visually readable at least in transmitted light.
- 5. A security document of claim 4, in which a second metal layer is congruently disposed underneath the machine testable substance.
- 6. A security document having a security element comprising a transparent carrier film which is provided on a surface thereof with at least one machine testable magnetic substance being applied in mutually spaced regions, thus defining gaps between said mutually spaced regions, and at least one electrically conductive metal layer disposed on top of the machine testable substance and on said gaps, the metal layer being provided with recesses in the form of indicia, said indicia being disposed in the gaps and being visually readable at least in transmitted light.
- 7. The security document of claim 6, in which a second metal layer is congruently disposed underneath the machine testable substance.
- 8. The security document of claim 6, in which the machine testable substance is mixed with an electrically conductive material.
- 9. The security document of claim 8, in which the electrically conductive material comprises carbon black particles.
- 10. The security document of claim 6, in which the electrically conductive metal layer comprises a metallic printing ink.
- 11. A security document having a security element comprising a transparent carrier film which is provided on a surface thereof with a printing ink containing at least one electrically conductive substance and at least one machine testable magnetic substance , said ink being provided on the carrier film with recesses formed in said ink in the form of indicia visually readable at least in transmitted light.
- 12. The security document of claim 11, in which a partly permeable electrically conductive metallic or oxide layer is disposed underneath said one layer.
- 13. The security document of claim 11, in which the electrically conductive substance comprises carbon black particles.
- 14. The security document of claim 1, 4, 6, or 11, in which the metal layer is selected from a group consisting of bronze inks, imitation metal inks, or a vacuum metalized layer.
- 15. The security document of claim 1, 4, 6 or 11, in which the machine testable substance is a magnetic ink.
- 16. A security element to be incorporated into a security document comprising a transparent carrier film, said transparent carrier film including at least one electrically conductive metal layer, the metal layer being provided with recesses in the form of indicia visually readable at least in transmitted light, and said transparent carrier film further including a magnetic substance disposed in selected partial areas having gaps therebetween on top of the metal layer with said indicia being located in said gaps, wherein said magnetic substance is readable by machine and said indicia are readable by visual inspection.
- 17. A security element to be incorporated into a security document comprising a transparent carrier film which is provided on a surface thereof with at least one machine testable substance having magnetic properties and at least one electrically conductive metal layer disposed on top of the machine testable substance, the metal layer and the machine testable substance including congruent recesses formed therein in the form of indicia visually readable at least in transmitted light.
- 18. A security element to be incorporated into a security document comprising a transparent carrier film which is provided on a surface thereof with at least one machine testable magnetic substance being applied in mutually spaced regions, thus defining gaps between said mutually Spaced regions, and at least one electrically conductive metal layer being disposed on top of the machine testable substance and on said gaps, the metal layer being provided with recesses in the form of indicia, said indicia being disposed in the gaps and being visually readable at least in transmitted light.
- 19. A security element to be incorporated into a security document comprising a transparent carrier film which is provided on a surface thereof with a printing ink containing at least one electrically conductive substance and at least one machine testable magnetic substance, said ink being provided on the document with recesses in the form of indicia visually readable at least in transmitted light.
- 20. A method for producing a security element to be incorporated into a security document and provided with indicia that are readily visible, both in transmitted light and in incident light, and machine readable, comprising the steps of:
- printing on a surface of a transparent carrier film with an activatable ink in form of readable indicia,
- applying a metallic layer over the entire carrier film,
- activating the ink to produce recesses in the form of the indicia in the metallic layer,
- applying a magnetic substance over selected partial areas having gaps therebetween of the carrier film with said indicia being located in said gaps, and
- cutting the film into strips of suitable width.
- 21. The method of claim 20, in which the indicia are printed in the form of parallel lines and columns.
- 22. The method of claim 20, in which the indicia are applied in parallel columns and shifted by half a line.
- 23. The method of claim 22, in which the magnetic substance is applied in bars parallel to the columns.
- 24. The method of claim 20, in which the magnetic substance is applied in stripes parallel to the lines.
- 25. The method of claim 20, in which the magnetic substance is mixed with electrically conductive material.
- 26. The method of claim 25, in which the magnetic substance is mixed with carbon black particles.
- 27. The method of claim 20, in which the activatable ink is activated by chemical solvents.
- 28. A method for producing a security element to be incorporated into a security document and provided with indicia that are readily visible, both in transmitted light and in incident light, and machine readable, comprising the steps of:
- printing on a surface of a transparent carrier film with an activatable ink in form of the indicia later to be readily visual, both in transmitted light and in incident light, and machine readable,
- providing the side of the carrier film bearing the activatable ink with a layer of a machine testable magnetic substance over the entire carrier film,
- applying a metallic layer over the entire machine testable substance,
- then activating the activatable ink to remove all layers of the carrier film giving rise to congruent recesses in the form of the indicia in the metallic layer and the machine testable substance, and
- cutting the film in strips of suitable width.
- 29. The method of claim 28, in which the metallic layer comprises a vacuum metalized layer, a bronze ink or an imitation metal ink.
- 30. The method of claim 28, in which the machine testable substance is mixed with an electrically conductive material.
- 31. The method of claim 30, in which the machine testable substance is mixed with carbon black properties.
- 32. The method of claim 28, in which the machine testable substance is a magnetic ink.
- 33. The method of claim 28, in which the removal of the layers over the carrier film is supported by ultrasonics, brushing, or rubbing.
- 34. The method of claim 28, in which the activatable ink is selected from a group consisting of wax bearing emulsions or foamable additives.
- 35. The method of claim 34, in which the foamable additives are present in the ink in the form of microcapsules.
- 36. The method of claim 28, which comprises activating the activatable ink by a laser beam, use of heat, electron beam, a coolant or by pressure.
- 37. The method of claim 28, in which a further metallic layer is provided congruently underneath the magnetic substance and on top of the activatable ink.
- 38. The method of claim 28, which comprises applying a protective transparent layer of lacquer prior to the cutting step.
Priority Claims (1)
Number |
Date |
Country |
Kind |
40 41 025.0 |
Dec 1990 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/920,574, filed Sep. 30, 1992, is now U.S. Pat. No. 5,354,099.
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Continuations (1)
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Number |
Date |
Country |
Parent |
920574 |
Sep 1992 |
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