Security Document Edge Coating via Lamination
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Solution Overview
Problem
Existing security and value documents with edge security features are complex and time-consuming to produce, requiring specialized printing devices for the narrow edges, which complicates the manufacturing process.
Innovation Solution
A security document with a coating that extends up to the edge, integrated between the carrier and cover layers, featuring multiple security levels (detectable by eye, with tools, or requiring specialized equipment) and a magnetically readable 'magnetic code' for verification, allowing for simplified production without complex edge printing devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If security features are applied to the edge after lamination using special printing devices, then security features can be formed on the edge, but the production process becomes very complex and time-consuming
Solution Approach 1:
The coating for the security feature is applied to the intermediate layer before lamination, rather than after. This preliminary action integrates the security feature formation into the lamination process itself, eliminating the need for separate edge printing operations and special printing devices, thereby reducing production complexity while maintaining security feature reliability
Solution Approach 2:
The patent combines the coating application step with the lamination process by applying the coating to the intermediate layer before stacking and laminating the layers together. This merging of operations allows the security feature to be formed as part of the lamination structure, eliminating the need for subsequent separate printing steps on the edge
2Reliability
If special printing devices are used for printing on the narrow edge, then security features can be created, but production time increases significantly
Solution Approach 1:
By applying the coating to the intermediate layer before lamination, the security feature is formed in advance during the main production process rather than requiring a separate post-processing step. This eliminates the time-consuming edge printing operation while maintaining precise security feature formation through the controlled coating application and subsequent lamination
Solution Approach 2:
The coating application is integrated into the continuous lamination process flow, allowing production to proceed without interruption for separate edge printing. The coating is applied, layers are stacked, and lamination occurs in a continuous sequence, maintaining production momentum and eliminating idle time associated with specialized edge printing 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
Facilitates quicker production of secure documents with enhanced protection against forgery, as the security features are integrated during lamination, reducing the risk of delamination and enabling verification through various means, including X-ray and visible light.
Implementation Method 1
The coating that forms the at least one security feature is introduced between the carrier layer and the cover layer
Implementation Method 2
the coating comprises a magnetic or magnetizable material or is formed from such a material, which means that there is a magnetically readable security feature on the edge
Implementation Method 3
which can be excited and/or spectroscopically detected at least in sections. Detailed knowledge is required to detect the security feature formed as a 'Level 3' security feature, which means that it can only be recognized and checked with special laboratory equipment or sensors such as a microscope, a spectrometer or an X-ray device
Data Source
Figure 1~2
Figure 3~4b
Figure 5
AI summary
The invention relates to a security document (100) comprising a carrier layer (104) forming a bottom surface (102), a cover layer (108) forming a top surface (106), and at least one edge (112) formed by the layers (104, 108) stacked in a stacking direction (110), on which at least one security feature (500) is arranged or formed. The security feature (500) detectable at the edge (112) is formed by a coating (114) that extends at least partially to the edge (112) and is inserted between the carrier layer (104) and the cover layer (108). The invention also relates to a method for producing such a security document (100).