Watermarking Wire Mesh Electrotype Element Integration
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Solution Overview
Problem
Existing methods for creating watermarked documents struggle with integrating electrotype elements at deformed regions of watermarking wire meshes, leading to difficulties in accurate welding and positioning, which complicates the production of anti-counterfeiting documents with both multitone watermarks and electrotype logos.
Innovation Solution
A method and apparatus that involve associating electrotype elements with preset regions of a watermarking wire mesh and deforming the mesh using a punch and die, followed by welding, allowing for the integration of electrotype elements at deformed regions, utilizing techniques like laser or resistance welding, and incorporating complementary recesses for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrotype elements are welded at pre-pressed (deformed) regions of the wire mesh, then watermarked logos can be integrated into the watermark region, but welding accuracy and reliability deteriorate due to the deformed geometry
Solution Approach 1:
The electrotype element is welded to the wire mesh **before** the pressing operation that creates the watermark deformation. This preliminary welding ensures that the element is securely attached to the original flat surface, avoiding the welding difficulties associated with deformed regions. The element is then positioned correctly in the final watermarked document through the subsequent pressing process.
2Ease of manufacture
If electrotype elements are punched to deform them for welding at pre-pressed regions, then welding can be performed, but positioning difficulty and manufacturing complexity increase
Solution Approach 1:
The electrotype element is welded to the wire mesh **before** the pressing operation. This eliminates the need for complex punching and positioning operations on deformed surfaces. The element is attached to the flat wire mesh in its original state, and the subsequent pressing process naturally positions it correctly in the final product.
3Reliability
If multitone watermarks are combined with electrotype logos, then document security is enhanced, but production complexity increases due to the integration challenges
Solution Approach 1:
The electrotype element is welded to the wire mesh **before** the pressing operation that creates the multitone watermark. This sequential approach simplifies the overall production process: first the element is attached to the flat mesh, then the pressing operation creates the watermark deformation while the element remains in its correct position. This eliminates the need for complex post-processing operations.
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
Enables the reliable production of security papers with integrated electrotype elements that can be decoded optically or tactilely, enhancing anti-counterfeiting measures by ensuring correct deformation and welding of the watermarking wire mesh, resulting in variable opacity patterns.
Implementation Method 1
a device for welding the electrotype element onto the respective preset region
Implementation Method 2
deforming plastically at least one predefined portion (4) of the watermarking wire mesh (1)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A method for providing a watermarking wire mesh (1), particularly for producing security paper and the like, comprising in sequence the following steps: - associating stably at least one electrotype element (2) or the like at a preset region (3) of a first working face (1a) of a watermarking wire mesh (1); - deforming plastically at least one predefined portion (4) of the watermarking wire mesh (1), which comprises at least partially the at least one electrotype element (2) or the like.