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Laminated multi-layer card with an inlaid security element in the form of relief structure

A technology of anti-counterfeit elements and embossed lines, which is applied in the field of multi-layer cards, and can solve the problems of inability to reduce the degree of damage of anti-counterfeit elements, poor film adhesion, cracking, etc.

Inactive Publication Date: 2003-03-19
GIESECKE & DEVRIENT MOBILE SECURITY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as described in EP0013557, these measures do little to reduce the degree of damage to the security element
Conversely, poorer film adhesion on the less stressed areas of the card is visible visually and can cause the layers of the card to crack in these areas as a result of the bending stress

Method used

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  • Laminated multi-layer card with an inlaid security element in the form of relief structure
  • Laminated multi-layer card with an inlaid security element in the form of relief structure
  • Laminated multi-layer card with an inlaid security element in the form of relief structure

Examples

Experimental program
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Effect test

Embodiment Construction

[0032] figure 1A plan view is shown of a multilayer laminated card 1 (for example a credit card) in which a security element 2 with a relief structure, in particular a hologram, is embedded. In addition, the card has a double-sided printed image, and optionally has other elements and security features, such as chips, signature strips, etc. ( figure 1 not shown). According to requirements, the form of the anti-counterfeit element 2 can be a line, or a strip or designed as a label-like element (patch) with a definite shape.

[0033] figure 2 A cross-sectional view showing the region of the security element 2 of the card 1 according to the first embodiment of the invention. The cover layers 10 and 11 of the card can be seen, between which the security element 2 is embedded. The security element 2 comprises: a transparent relief layer 21 in which reliefs forming a holographic diffractive structure are embossed; a vapor-deposited metal layer 22 (optionally provided) enhancing ...

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PUM

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Abstract

A card, in particular credit card, identity card, bank card or the like is proposed that includes a plurality of laminated layers between which a security element with a relief structure, in particular holographic diffraction structures, is embedded. The materials are selected so that the softening temperature of the security element layer having the relief structure has a higher softening temperature than the card layers between which the security element is laminated. This permits the multilayer laminated card to be produced by conventional laminating methods without appreciably impairing the relief structure by the pressures and temperatures thereby occurring. Special combinations of materials and in particular suitable materials for the layer having the relief structure are proposed.

Description

technical field [0001] The present invention relates to a multi-layer card, especially a credit card, an ID card, a bank card, etc., having an anti-counterfeit element with a diffractive structure, especially a holographic embossed structure, and also relates to a method for producing the card. Background technique [0002] It is known to equip cards, in particular bank cards, credit cards or identity cards, with security elements in the form of full-scale pictures, film pictures or the like. The security element has very specific optical effects, which are dependent on the viewing angle and can be observed with the naked eye without tools, while the process for producing the security element is rather complex. The presence of this security element with a certain optical effect can be regarded as a sign of authenticity, that is, the presence of this security element means that the card is genuine. [0003] Usually, the security element with diffractive structures is glued o...

Claims

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Application Information

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IPC IPC(8): B42D25/00G03H1/18
CPCB42D25/00B32B2425/00B42D25/455B42D25/373B42D25/378B42D25/364B42D25/351B42D25/46B42D25/36B42D25/328B42D25/324B42D25/23G07F7/0813
Inventor 马里奥·凯勒冈特·恩德雷斯曼弗雷德·恩格尔
Owner GIESECKE & DEVRIENT MOBILE SECURITY GMBH
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