Embossing Device for Passport Grain Structure Integrity
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Solution Overview
Problem
Existing methods for producing book-like security documents, such as passports, often result in distorted surface structures and reduced security against forgery due to the sequential introduction of basic grain and design elements, which can compromise the authenticity verification process.
Innovation Solution
An embossing device with multiple pressure surfaces, where the first surface introduces a basic grain and the second surface introduces a design element, allowing for simultaneous embossing without distorting the grain structure, enabling a high-quality, forgery-proof surface structure in a single work step.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the design element is embossed after the grain structure is introduced, then the design element can be incorporated into the book cover, but the base grain structure becomes distorted and recognizable in the embossed area
Solution Approach 1:
The patent combines the embossing of the design element and the introduction of the grain structure into a single simultaneous operation using one embossing tool with multiple printing surfaces. This merging eliminates the sequential process that causes grain distortion, as both features are created together without interfering with each other's structural integrity.
Solution Approach 2:
The embossing tool is segmented into multiple printing surfaces (first printing surface for grain structure, second printing surface for design element) that operate simultaneously but independently. Each surface is responsible for a specific feature, allowing both to be created without mutual interference while maintaining the grain structure's integrity in the embossed area.
2Ease of manufacture
If the design element is embossed after graining, then the element can be added to the book cover, but the visual impression and counterfeit protection are reduced
Solution Approach 1:
By merging the embossing of design elements and grain structure introduction into a single simultaneous operation, the patent ensures that the grain structure remains undistorted and recognizable. This enhances authenticity verification because the grain pattern serves as a reliable security feature that cannot be easily replicated by counterfeiters who would need to reproduce both the grain and design element perfectly in one operation.
Solution Approach 2:
The patent changes the process parameter from sequential to simultaneous embossing, which fundamentally alters the outcome by preventing grain distortion. This parameter change ensures that the grain structure maintains its original characteristics, thereby improving the reliability of authenticity verification while still allowing design elements to be incorporated.
3Productivity
If a single embossing tool with multiple printing surfaces is used, then simultaneous embossing is achieved, but the device complexity increases
Solution Approach 1:
The embossing tool is designed as a universal device with multiple printing surfaces that can simultaneously create different features (grain structure and design elements). This multi-functional tool consolidates what would otherwise require multiple separate embossing operations and tools, increasing productivity while the modular design of the printing surfaces keeps the complexity manageable.
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 the visual impression and security against forgery by maintaining the integrity of the basic grain structure and allowing design elements to be recognizable, thereby increasing the document's authenticity verification capabilities.
Implementation Method 1
The embossing device is designed to emboss a basic grain and a design element jointly into a book-like security document
Implementation Method 2
the embossing device is heatable, in particular heated. In particular, it is provided that the embossing device is designed such that the first printing surface and/or the second printing surface are heatable
Data Source
AI summary
The invention relates to an embossing device (1) for producing a book-like security document, in particular a passport book, with a surface texture, as well as the production method itself and the book-like security document produced in this way. The embossing device (1) comprises a printing element (3) having a first printing surface (10). The first printing surface (10) has a first structure in a first extension plane (12). Furthermore, the printing element (3) comprises a second printing surface (20). This second printing surface borders at least partially on the first printing surface (10). The second printing surface (20) has a second structure different from the first structure and/or is arranged in a second extension plane (22) that is spaced (30) apart from the first extension plane (12).