Security document and a method for producing it

• US 5,516,153 A
• Filed: 02/21/1995
• Issued: 05/14/1996
• Est. Priority Date: 01/17/1991
• Status: Expired due to Term

• Current Assignee: GAO Gesellschaft Fur Automation und Organisation mbH
• Original Assignee: GAO Gesellschaft Fur Automation und Organisation mbH
• Inventors: Kaule, Wittich
• Primary Examiner(s): Vo, Peter
• Assistant Examiner(s): NGUYEN, KHAN
• Application Number:
  US08/391,275
• Time in Patent Office: 448 Days
• Field of Search: 283/87, 283/70, 283/72, 283/82, 283/83, 283/85, 283/91, 283/901, 283/904, 428/915, 428/916, 428/208, 428/209, 162/106, 162/125, 162/140, 427/7
• US Class Current: 283/85
• CPC Class Codes: B42D 2033/16 Magnetic or magnetisable material
• CPC Class Codes: B42D 25/23 Identity cards
• CPC Class Codes: B42D 25/29 Securities; Bank notes
• CPC Class Codes: B42D 25/355 Security threads
• CPC Class Codes: B42D 25/369 Magnetised or magnetisable materials
• CPC Class Codes: G06K 19/12 the marking being sensed by magnetic means
• CPC Class Codes: G07D 7/04 Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint G07D7/01 takes precedence
• CPC Class Codes: G07D 7/12 Visible light, infrared or ultraviolet radiation
• CPC Class Codes: G07D 7/20 Testing patterns thereon G07D7/004, G07D7/005 take precedence
• CPC Class Codes: Y10S 283/901 Concealed data
• CPC Class Codes: Y10S 428/915 Fraud or tamper detecting

Abstract

A security element for use in a security document such as a bank note, identity card or the like includes at least a partial metallic coating on a substrate and wherein the metallic coating includes recesses in the forms of characters or patterns that are visually recognizable at least in transmitted light and a magnetic coating of soft-magnetic pigments disposed in overlying relationship with the metallic coating. A security document containing the security element is also described. Various arrangements of metallic and magnetic coatings and a method of producing the security element are also described,

Claims

1. In a security document having a security element in the form of a thread or film consisting of a substrate of plastic, said substrate including at least one electrically conductive metallic coating and at least one magnetic coating which is recognizable by machine, the improvement wherein said metallic coating includes recesses in the form of characters or patterns that are visually recognizable at least in transmitted light, and wherein said magnetic coating contains soft-magnetic pigments disposed at least in partial areas of said security element, and wherein said metallic and magnetic coatings are positioned one above the other.

2. The security document of claim 1, wherein said magnetic coating is disposed above said metallic coating in partial areas thereof, and wherein said metallic coating is provided with said visually recognizable characters in at least intermediate areas which are free of said magnetic coating.

3. The security document of claim 2 wherein said magnetic coating is arranged in strips along the length of said security element and symmetrically to both sides of said visually recognizable characters.

4. The security document of claim 1, wherein said magnetic coating is disposed above the entire surface of said metallic coating and provides sufficient transparency to enable recognition of said characters in transmitted light.

5. The security document of claim 1, wherein the magnetic coating comprises magnetic material consisting entirely of soft-magnetic pigments.

6. A security element for use within a security document, said security element comprising a substrate of plastic comprising at least one electrically conductive metallic coating and at least one magnetic coating which is recognizable by machine, the improvement wherein said metallic coating includes recesses in the form of characters or patterns which are visually recognizable at least in transmitted light, and wherein said magnetic coating contains soft-magnetic pigments disposed at least in partial areas of said security elements, and wherein said metallic and magnetic coatings are positioned one above the other.

7. The security element of claim 6 wherein said magnetic coating is disposed above said metallic coating in partial areas thereof, and wherein said metallic coating is provided with said visually recognizable characters in at least intermediate areas which are free of said magnetic coating.

8. The security element of claim 7 wherein said magnetic coating is arranged in strips along the length of said security element and symmetrically to both sides of said visually recognizable characters.

9. The security element of claim 6 wherein said magnetic coating being disposed above the entire surface of said metallic coating and provides sufficient transparency to enable recognition of said characters in transmitted light.

10. The security element as claimed in claim 6, wherein the magnetic coating comprises magnetic material consisting entirely of soft-magnetic pigments.

11. A method for producing a security document such as a banknote, identity card or the like, having a security element comprising a substrate of plastic having at least one electrically conductive metallic coating and at least one magnetic coating which is recognizable by machine, comprising the steps of:

a) providing a carrier film with at least a partial metallic coating comprising recesses in the form of characters or patterns that are visually recognizable at least in transmitted light;

b) applying above said metallic coating a magnetic coating in at least partial areas thereof, said magnetic coating containing soft-magnetic pigments;

c) cutting said film into a security element of predetermined form; and

d) embedding said security element in said security document.

12. A method according to claim 11, wherein said step (b) includes applying a magnetic coating comprising a magnetic material consisting entirely of soft-magnetic pigments.

13. A method for producing a security element for use within a security document, said security element comprising a substrate of plastic comprising at least one electrically conductive metallic coating and at least one magnetic coating which is recognizable by machine, comprising the steps of:

a) providing a carrier film with at least a partial metallic coating, said metallic coating being provided with recesses in the form of characters or patterns that are visually recognizable at least in transmitted light;

b) applying above said metallic coating a magnetic coating in at least partial areas thereof, said magnetic coating containing soft-magnetic pigments;

c) cutting said film into security elements of predetermined form.

14. A method according to claim 13, wherein said step (b) includes applying a magnetic coating comprising a magnetic material consisting entirely of soft-magnetic pigments.