Metallized Embossed Film for Secure Value Documents
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Solution Overview
Problem
Current banknotes and value documents face challenges in combining film-based security elements with image-generated features while ensuring durability and preventing counterfeiting, with issues such as registration accuracy, foil detachment, and color retention during circulation.
Innovation Solution
A document of value entirely composed of a film body with fully surface-structured embossed structures, featuring varying profiling and metallization, which reproduces the representation in multiple diffraction orders and is designed to be robust and secure, eliminating the need for conventional printing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If foil-based security elements are applied to banknote paper, then counterfeit protection is improved, but registration accuracy with printed image and watermark deteriorates
Solution Approach 1:
The patent merges the foil-based security element with the banknote substrate by bonding the foil directly to the paper during the paper manufacturing process. This integration ensures that the security element and the printed image/watermark are produced in the same manufacturing stage, eliminating subsequent registration issues while maintaining counterfeit protection benefits.
2Reliability
If foil elements are applied to banknote paper, then security features are improved, but durability during circulation deteriorates due to detachment risk
Solution Approach 1:
The security foil is incorporated into the banknote paper during the paper manufacturing process before the banknote goes into circulation. This preliminary integration ensures that the bonding between foil and paper is established under controlled manufacturing conditions, preventing detachment during subsequent circulation and handling.
3Productivity
If conventional printing processes are used for banknotes, then production flexibility is maintained, but manufacturing complexity increases when combining with foil elements
Solution Approach 1:
The patent combines the foil application process with the paper manufacturing process into a single integrated operation. This merging eliminates the need for separate foil application and printing steps, reducing manufacturing complexity while maintaining production flexibility for different banknote designs.
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
The solution enhances security against counterfeiting, simplifies production, and ensures durability by providing a wide viewing angle range for the representation, while allowing for easy implementation of supervision and transparency effects, and individualization through metallization patterns.
Implementation Method 1
The embossed structure has a laterally, i.e. transversely to the plan view direction, varying profiling and/or metallization, wherein the first, at least partially metallized embossed structure is formed on a foil front side facing the front side
Data Source
Figure 1~2
Figure 3~5
AI summary
The invention relates to a value document, such as a banknote (1), a cheque, a credit card or other payment card, an identification card or the like, which has a front side (9) and a back side (10), displays an image (3) that is recognizable by the unaided eye in the top view at least from the front side (9), has specific dimensions (B, H) in the top view, and has a substrate body (2) which, in the top view, has the specific dimensions (B, H) and is structured by at least one transparent film (11, 12) which also has the specific dimensions (B, H) in the top view. According to the invention, the image (3) that is recognizable from the front side (9) is produced by a first embossed structure (14), which is metallized at least in sections and which is arranged on one side of the first film (9) and which has a lateral, i.e. crosswise to the top view direction, varying profiling and/or metallization, wherein the first embossed structure (14), which is metallized at least in sections, is formed on a front side of the film facing the front side, and a second embossed structure (14), which is metallized at least in sections, is formed on a back side of the film facing the back side (10), and at least one of the metallized embossed structures (14) is covered with a leveling cover layer (22).