Fabric Tab Security via Segmented Thread Embossing
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Solution Overview
Problem
Existing methods for producing tabs in book-like documents face challenges in enhancing security against forgery and manipulation, as the fabric-like band materials used for tabs often distort or obscure security features when applied, making them difficult to read or detect.
Innovation Solution
A method involving a fabric-shaped band material with individual polymer threads, where an embossing foil is heated to an embossing temperature and applied to the fabric using a stamp, allowing for precise printing and secure adhesion of security features onto the tab, ensuring the tab remains flexible and resistant to manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fabric-like band material is applied to the data carrier to form a flap, then the document gains aesthetic appeal and flexibility, but security features become distorted or obscured making them difficult to read or detect
Solution Approach 1:
The patent divides the flap into multiple individual polymer threads instead of using a continuous fabric material. This segmentation allows light to pass through the gaps between threads, making underlying security features visible while maintaining the flexible band-like appearance and feel of the flap.
Solution Approach 2:
The fabric-like band material is designed with a porous or open structure where individual polymer threads are spaced apart. This porosity allows optical penetration through the flap material, enabling security features on the data carrier to be detected and read through the flap without complete obscuration.
2Reliability
If printing is applied to the fabric-like strip material to add security features, then security against forgery is enhanced, but the fabric loses flexibility and becomes completely filled with ink
Solution Approach 1:
Instead of applying continuous ink printing that would saturate the fabric, the patent uses segmented application where individual surface sections are applied to specific thread bellies. This maintains the open structure and flexibility of the fabric while providing discrete security markings.
Solution Approach 2:
The printing or surface section application is localized to specific areas (thread bellies) rather than uniformly across the entire fabric surface. This local quality approach allows security features to be present where needed while leaving other areas open and flexible.
3Reliability
If the stamping surface is heated to embossing temperature to activate adhesive, then secure attachment is achieved, but the processing complexity and energy consumption increase
Solution Approach 1:
The patent changes the temperature parameter of the stamping surface to an embossing temperature that activates the adhesive layer. This parameter change enables secure attachment of the foil to the fabric without requiring complex additional bonding mechanisms.
Solution Approach 2:
The heating process induces a phase transition or softening of the adhesive layer, allowing it to bond effectively. The thermal energy causes the adhesive to transition from a non-adhesive state to an adhesive state, securing the foil attachment.
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
This method enables effective printing and secure attachment of security features onto the tab, enhancing the document's security by maintaining flexibility and clarity of the fabric while preventing manipulation, thus increasing the difficulty of counterfeiting.
Implementation Method 1
the at least one stamping surface is heated to an embossing temperature of the embossing foil or the embossing foil is heated to an embossing temperature
Implementation Method 2
activates an adhesive layer on the stamping foil in the area of the contact points in order to fix the surface section(s) of the stamping foil to the thread belly(s)
Data Source
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AI summary
The invention relates to a tab, a data page, a book block and a book-like document, and to a method for the production thereof, in which a fabric-like strip material is provided for forming the tab (23), is fed to a processing station (51) and applied as a printing (47) to one or more thread balloons (64) of the fabric-like strip material of an embossing film (58).