Multilayer Passport Data Page Insert with Metal Reinforcement
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Solution Overview
Problem
Existing data pages in passport booklets lack sufficient pull-out resistance and are difficult to produce economically, especially when incorporating metal layers for antenna functionality, and they are prone to forgery due to limited security features.
Innovation Solution
A multilayer insert structure with a metal reinforcing layer extending beyond the folding zone, combined with a plastic layer, provides enhanced pull-out and tear resistance, and allows for the integration of visible security elements, while being thinner and more economical to produce, using a single metal layer for both the antenna and hinge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a flexible data sheet with multiple plastic layers is used, then the data page can be assembled with the passport booklet, but the pull-out resistance remains low because all layers are made of plastic
Solution Approach 1:
The patent applies composite materials by combining a metal layer with plastic layers to form a multilayer insert. The metal layer (aluminum, stainless steel, or other non-ferrous metals) provides superior pull-out resistance compared to pure plastic constructions, while the plastic layers maintain flexibility and assembly capability. This composite structure resolves the contradiction by introducing metal reinforcement without completely abandoning the plastic assembly approach.
Solution Approach 2:
The metal layer serves multiple functions simultaneously: it acts as structural reinforcement to improve pull-out resistance, provides antenna functionality for electronic passports through RFID integration, and enables security marking capabilities. This multi-functionality reduces the need for separate components, thereby maintaining ease of manufacture while significantly improving strength.
2Strength
If a metal layer is added to improve mechanical resistance and form an antenna, then pull-out resistance improves, but the thickness and production complexity increase
Solution Approach 1:
The patent merges the antenna function and hinge function into a single integrated metal layer structure. The metal layer extends beyond the folding zone to serve as both the RFID antenna and the hinge reinforcement, eliminating the need for separate antenna components and complex multilayer constructions. This merging reduces device complexity while maintaining improved mechanical resistance.
Solution Approach 2:
The metal layer is strategically positioned and dimensioned to provide reinforcement only where needed - extending beyond the folding zone by a specific distance (typically 2-10mm) to improve pull-out resistance at the hinge area, while maintaining antenna functionality in the appropriate zones. This localized approach optimizes strength without unnecessarily increasing overall complexity.
3Strength
If the metal layer is extended beyond the folding zone to act as a hinge, then pull-out resistance and tear resistance improve, but the manufacturing cost increases
Solution Approach 1:
The extended metal layer serves dual purposes: it reinforces the hinge area to improve tear and pull-out resistance, and simultaneously functions as the RFID antenna. This multi-functionality means that the same metal extension provides both structural strength and electronic functionality, thereby reducing the need for additional components and offsetting the increased material usage through manufacturing efficiency.
Solution Approach 2:
The patent optimizes the extension distance of the metal layer beyond the folding zone to a specific range (2-10mm, preferably 3-5mm). This parameter optimization ensures sufficient tear and pull-out resistance while minimizing material consumption and manufacturing complexity. The extended metal layer is laminated to the plastic substrate using standard lamination techniques, maintaining ease of manufacture through established processes.
Data Source
AI summary
The invention relates to an insert for a passport booklet data sheet, formed by a multilayer complex having at least a first layer and a second layer having a hinge that has a folding zone where the insert is intended to be sewn or stapled into a passport booklet, said second layer having, in combination, at least one layer of plastics material and at least one metal reinforcing layer that together form an extension which extends a certain distance beyond said folding zone of the hinge, so as to reinforce the resistance of said data sheet to being ripped out and torn with respect to the passport booklet, characterized in that said layer of plastics material and said metal reinforcing layer extend over the entire surface area of the insert.