Interlaminar structure for security element
AssigneeGiesecke & Devrient GmbH
InventorTheo Burchard
Life of this patent
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Abstract
A multilayer security element with at least two security features exactly disposed to each other is produced by the security features being present on separate carrier foils (100, 200) and the carrier foils being laminated with each other in such a way that the security features in the layer compound are disposed to each other in register. As to achieve an exact register of the security features, each carrier foil has register marks, with the help of which the foils are controlled relative to each other. The controlling is effected by stretching that carrier foil, the security features of which are running behind relative to the security features of the respective other carrier foil.
Claims10
A method for producing a layer compound (6) with at least two security features disposed in register to each other, comprising the following steps:
- providing a first carrier foil (100) with at least one first security feature and first register marks,
- providing a second carrier foil (200) with at least one second security feature and second register marks,
- joining the first carrier foil to the second carrier foil, at least one of the two carrier foils being under tensile stress and at least one of the second or the first carrier foil being controlled in longitudinal direction and transverse direction with the help of the first and second register marks in such a way, that a layer compound is the result, in which the first and second security features are disposed in register to each other, whereas the controlling of at least one of the second carrier foil (200) or the first carrier foil (100) is effected by stretching the carrier foil in longitudinal direction of the carrier foil.
Dependencies are inferred from the claim text.