Security Booklet Page Sheet Adhesion Offset

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Solution Overview

Problem

Conventional paper-based security booklets, such as passports, are vulnerable to tampering as the stitched pages can be removed and replaced without detection, compromising the security of personalized data.

Innovation Solution

A page sheet is adhered laterally offset from the folding axis, with a second part folded freely, making it difficult to remove without damage, and incorporating security features like watermarks and electronic chips for enhanced security.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If page sheets are stitched together along the axis to form a book block, then the booklet can be folded about the axis, but the stitched pages can be removed and replaced without detection

Engineering Contradiction:

ImprovefoldabilityVSAvoidanti-tamper security

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The page sheet is divided into two distinct parts: a first part that is adhered to the cover at a location laterally offset from the axis, and a second part that forms a page of the booklet. This segmentation creates a dependency where removing the page sheet requires detaching the adhered portion, which would cause detectable damage or separation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first part of the page sheet is merged with the cover through adhesion at an offset location, creating a combined structure. This merging ensures that the page sheet cannot be removed without affecting the cover or the adhered portion, thereby providing tamper detection while maintaining foldability of the second part.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If the first part of the page sheet is adhered to the cover at a location laterally offset from the axis, then tamper detection is improved, but the structure becomes more complex

Engineering Contradiction:

Improveanti-tamper securityVSAvoidadhesion structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Adhesion is applied locally only to the first part of the page sheet at a specific offset location on the cover, rather than adhering the entire page sheet or using complex multi-point adhesion systems. This localized approach provides sufficient tamper detection while minimizing structural complexity.

Inventive Principle:

Principle #3Local quality

3Ease of manufacture

If end pages are adhered to the inner surface of the cover, then security elements can be hidden and a smooth surface provided, but tamper resistance is not significantly improved

Engineering Contradiction:

Improvecover finishingVSAvoidanti-tamper security

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

Instead of adhering a separate end page to the cover and then attaching the page sheet to the end page, the invention adheres the first part of the page sheet directly to the cover. This inversion of the traditional layering approach creates a direct mechanical connection between the page sheet and cover, making tamper detection more effective while still providing the benefits of end page functionality.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentEP3122568B2Security booklet

Publication Date: 2025.06.25 HID CID LTD

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AI summary

A security booklet comprising i)a cover foldable about an axis; ii)a set of page sheets stitched together along the axis about which they can be folded to define a set of pages, wherein each page sheet is formed of a single fibrous sheet; wherein iii)one part of one of the page sheets laterally offset from the axis is adhered to the cover, while another part of the said one page sheet can be folded separately from the cover and the other pages about the axis.