Multi-page Security Document Laser Personalization
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Solution Overview
Problem
Multi-page security documents, such as passports, lack effective security measures to prevent page swapping, making it difficult to determine if pages were originally bound together, thus vulnerable to counterfeiting.
Innovation Solution
A method involving a laser-alterable ink layer on the edges of pages to create a personalized pattern by exposing specific areas to a laser, ensuring that adjacent pages have matching personalization sections, which can be revealed through angle-cutting or bending, forming a two-dimensional multi-page personalization section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pages in a multi-page security document are bound together with standard binding methods, then the document can be produced and used, but the document is vulnerable to page swapping counterfeiting because there is no effective security measure to prevent or detect page substitution
Solution Approach 1:
The security feature is segmented across multiple pages of the document. Each page contains a portion of the laser-alterable ink layer with personalization elements, and when viewed together in sequence, these segments form a complete two-dimensional pattern that spans across all pages. This segmentation ensures that page swapping is detectable because the segmented pattern would be disrupted.
Solution Approach 2:
The patent utilizes laser-alterable ink layers that change their optical properties when exposed to laser light. The personalization elements are created by selectively altering the ink layer through laser exposure, which changes the reflectivity or absorption characteristics of the ink in specific patterns. This parameter change provides a reliable and detectable security feature.
2Reliability
If laser-alterable ink layers are applied to create two-dimensional multi-page personalization sections, then page swapping detection is enabled, but the manufacturing process becomes more complex
Solution Approach 1:
The laser-alterable ink layers are applied to the pages during the initial document production process, before the document is assembled and before any personalization takes place. This preliminary application of the ink layer ensures that the security feature is integrated into the document structure from the outset, simplifying the overall manufacturing process by combining security feature application with document production.
3Measurement precision
If the personalization area is revealed through angle-cutting or bending, then the two-dimensional pattern becomes visible for verification, but the document structure is modified
Solution Approach 1:
The patent transitions from two-dimensional personalization on individual pages to a three-dimensional multi-page personalization section. By stacking multiple pages with laser-alterable ink layers and revealing them through angle-cutting or bending, the personalization elements form a three-dimensional structure that can be viewed from multiple angles, enhancing verification capabilities while maintaining document integrity.
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 enhances security by creating a unique, visible pattern when pages are viewed simultaneously, making it easier to detect page swapping and thus preventing counterfeiting.
Implementation Method 1
altering the inked personalization area in the revealed portion of each page by exposing the revealed portions to a laser
Implementation Method 2
the exposure to laser bleaches the laser-alterable ink layer
Data Source
AI summary
Personalizing a multipage security document by placing a laser-alterable ink layer on a personalization area of an edge of each of the sequence of pages. The method includes revealing a portion of the personalization area of each of the sequence of pages relative to a pages above said each of the sequence of pages such that the personalization portion of each two consecutive pages in said sequence of pages are located adjacent to one another thereby producing a two-dimensional multi-page personalization section, and creating a pattern on the two-dimensional multi-page personalization section by altering the inked personalization area in the revealed portion of each page of said sequence of pages by exposing said revealed portions to a laser, such that a pattern is visible when the revealed portions of a sequence of pages are viewed simultaneously.