Laminated Document End Face Identifier for Forgery Protection
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Solution Overview
Problem
Existing security documents lack effective forgery-proof identifiers that can be optically detected on the front side, making it difficult to authenticate them, especially when multiple documents are stacked and aligned by their front sides.
Innovation Solution
A document body with a laminated structure where an identification print is applied on one layer surface before lamination, extending to the end face, and covered by another layer, allowing optical detection only on the front side, using opaque layers to prevent detection in reflected light while enabling detection in transmitted light, ensuring the identifier is hidden from top and bottom views.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an identifier is printed on the front surface of a document body, then it can be optically detected for authentication, but it can also be easily forged or tampered with
Solution Approach 1:
The identifier is nested within the laminated document body structure by printing it on an inner layer that is subsequently covered by additional layers during lamination. This nesting protects the identifier from forgery while maintaining optical detectability through the transparent layers.
Solution Approach 2:
The identifier is positioned at the end face of the document body rather than on the front surface, changing its spatial dimension. This allows optical detection from the front side while preventing direct access for forgery, as the identifier extends to the end face where it is protected by the laminated structure.
2Ease of operation
If multiple document bodies are stacked with front sides aligned, then handling and processing is simplified, but optical detection of identifiers becomes difficult
Solution Approach 1:
The identifier is positioned at the end face of the document body, perpendicular to the front surface. This dimensional change allows identifiers to be optically detected even when documents are stacked with front sides aligned, as the end faces remain accessible for detection.
3Ease of operation
If the identifier is made visible from the top and bottom surfaces, then authentication is easier, but forgery becomes more possible
Solution Approach 1:
The laminated layers have different optical properties: some layers are transparent to allow optical detection of the identifier, while the outer layers are opaque to prevent access and forgery. This local quality differentiation enables both authentication and security.
Solution Approach 2:
The identifier is nested within the laminated structure on an inner layer, surrounded by protective layers. This nesting arrangement allows the identifier to be optically detected through transparent layers while being protected from forgery by opaque outer layers.
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 provides a secure, forgery-proof end face identifier that can be easily verified for authenticity, ensuring correct orientation and detection of document alignment without being recognizable from the top or bottom, thus preventing counterfeiting and ensuring reliable authentication.
Implementation Method 1
the identifier being formed inside the laminated body, so that it can be optically detected on the at least one end face
Implementation Method 2
using opaque layers to prevent detection in reflected light
Data Source
Figure 1~2
Figure 3~5
Figure 6a~9b
AI summary
The invention relates to a document body (1) with a forgery-proof front-end identifier (412, 423) and a method for its manufacture. The document body (1) comprises a flat lamination body (10) formed from several thin layers (20) laminated together with their surfaces, the lamination body having a top (11) and an opposite bottom (12), and wherein at least one end face (13, 14, 16, 17) is formed between the top (11) and the bottom (12), wherein an identifier is formed inside the lamination body such that it is optically detectable as an end face identifier on the at least one end face (13, 14, 16, 17), wherein the identifier is printed as an identifier print (100) on a layer surface (51) arranged inside the lamination body (10), and wherein the identifier print (100) extends to the at least one end face (13, 14, 16, 17).wherein at least one of the layers (20; 30, 40, 50, 60, 70) has sufficient opacity between the top (11) and the identification print (100) and between the bottom (12) and the identification print (100) such that the identification print (100) is not detectable during reflected light detection, where illumination with visible light and optical detection are performed from the same side of the lamination body (10), wherein the opacities of the layers (20) are selected such that during transmitted light detection with visible light, where the document body (1) is arranged between the illumination source (310) and the detection device (320), at least a contrast caused by the identification print (100) is detectable.