Windowed Security Strip Layout for Banknote Visibility and Strength
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Solution Overview
Problem
The integration of a security strip into security documents, such as banknotes, often results in a significant portion of its surface being concealed, reducing its effectiveness for first-level authentication and potentially weakening the document's mechanical performance.
Innovation Solution
A security document with a security strip partially integrated into its body, where the strip emerges at multiple places on the surface and is impregnated with a de-opacifying agent, allowing it to form visible windows and maintain mechanical integrity, while security elements are strategically positioned to enhance visibility and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the security strip is completely integrated into the body of the document, then the mechanical strength and integrity of the document are improved, but the visibility of the security strip and its authentication marks are significantly reduced
Solution Approach 1:
The patent divides the integration of the security strip into segments: the strip is integrated into the document body at certain sections (improving strength) while remaining emergent at other sections (maintaining visibility). This segmentation allows different parts of the strip to serve different functions - embedded portions provide mechanical reinforcement while emergent portions display authentication marks.
Solution Approach 2:
The patent applies different integration depths to different sections of the security strip. Specifically, the strip is completely integrated in some areas (where mechanical strength is prioritized) and partially emergent in other areas (where visibility and authentication are prioritized). This local variation in integration quality resolves the contradiction between strength and visibility.
2Illumination intensity
If the security strip emerges in many places on the surface, then the visibility and authentication capability are improved, but the mechanical performance and integrity of the document are weakened
Solution Approach 1:
The security strip is divided into multiple segments along its length, with alternating patterns of integration and emergence. This segmentation allows the document to maintain mechanical integrity in embedded sections while providing sufficient visibility in emergent sections for authentication purposes.
Solution Approach 2:
Rather than having the strip emerge continuously (excessive action that would weaken the document), the patent uses partial emergence at strategically selected locations. This partial action provides adequate visibility for authentication without compromising overall mechanical performance.
3Stability of the object's composition
If the security strip is completely buried in the document body, then the mechanical integrity is maintained, but the effectiveness for first-level authentication is reduced
Solution Approach 1:
The patent implements local variation in strip integration: completely buried sections maintain mechanical integrity while partially emergent sections preserve authentication information. This local quality differentiation ensures both mechanical stability and authentication effectiveness are achieved in their respective zones.
Solution Approach 2:
The security strip is segmented into buried and emergent portions, with each segment serving its specific function. The buried segments provide structural stability while the emergent segments display authentication marks, resolving the information loss problem without compromising overall mechanical integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach increases the visibility of the security strip without compromising its mechanical performance, enhancing authentication capabilities and security without increasing manufacturing complexity or costs.
Implementation Method 1
the body is impregnated with a deopacifying agent at least opposite a part of this strip
Data Source
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AI summary
The invention relates, in particular, to a security document (1) having front (11) and back (10) faces and of which the body (C) at least partially consists of fibres, a security strip (2) being at least partially incorporated into said body (C), said body (C) being impregnated with a de-opacifying agent at least facing a part of said strip (2), characterised by the fact that said strip (2) is partially incorporated into said body (C), such that said strip emerges at a plurality of locations at the surface of said body (C) on said front face (11), thus forming windows (F), two consecutive windows (F) being separated by a bridge (P) corresponding to a region in which the strip (2) is buried in said body (C), and such that said de-opacifying agent also impregnates the body (C) in the areas (3) located to either side of the longitudinal sides of said strip (2), at least facing one region forming a bridge (P).