Security Ribbon Double Thread Optical Illusion
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Solution Overview
Problem
Existing security document technologies face challenges in creating complex optical effects that are difficult to counterfeit, particularly with the simultaneous and synchronized implementation of multiple threads, which results in deformation and complexity in manufacturing, as well as difficulties in pattern identification.
Innovation Solution
A security band with two zones creating the illusion of two different threads, featuring a transparent or translucent support material with a reflective coating and a longitudinal strip separating the zones, each with distinct optical effects and negative patterns in register, providing a unique visual effect that enhances authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If two parallel wires are introduced on separate tracks to increase visible regions, then the size and number of visible wire regions increase, but the manufacturing process becomes cumbersome and complex, and significant deformation of the support occurs
Solution Approach 1:
The security band is segmented into two distinct zones (first zone and second zone) separated by a longitudinal strip. Each zone contains its own rendering and optical effects, allowing them to be manufactured independently and then combined, thus reducing manufacturing complexity while maintaining multiple visible regions
Solution Approach 2:
Two zones that would traditionally require separate wires are merged into a single security band structure. The zones are positioned adjacent to each other and separated by a longitudinal strip, creating the appearance of multiple threads while using a unified manufacturing process
2Area of stationary object
If two parallel wires are introduced on separate tracks to increase visible regions, then the size and number of visible wire regions increase, but significant deformation of the support occurs
Solution Approach 1:
The security band is segmented into two distinct zones separated by a longitudinal strip. This segmentation allows each zone to be optimized independently and reduces the overall structural stress on the support, preventing deformation while maintaining multiple visible regions
Solution Approach 2:
Each zone has its own specific rendering and optical effects tailored to its function. The longitudinal strip acts as a local separator that maintains structural integrity while allowing optical differentiation between zones, preventing support deformation
3Reliability
If traditional embedded threads are used, then the threads are invisible in reflected light, but they are only visible in transmitted light which limits authentication ease for ordinary users
Solution Approach 1:
The coating on the security band includes optically variable materials that change appearance based on viewing angle and lighting conditions. This allows the thread to be visible both in reflected light (for immediate authentication) and in transmitted light (for verification), enhancing both reliability and ease of operation
Solution Approach 2:
The security band uses composite materials including transparent or translucent support material, reflective coatings, and optically variable inks. This composite structure enables the thread to exhibit multiple optical properties simultaneously, making it visible in both reflected and transmitted light
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 provides a visually distinct 'double thread' effect that is challenging to counterfeit, while simplifying the manufacturing process and improving pattern identification, thereby enhancing the security and usability of the security document.
Implementation Method 1
visible by reflection, and which comprises a longitudinal strip at least partially devoid of said coating
Implementation Method 2
transparent or translucent support material
Data Source
Figure 1
Figure 2~4
Figure 5
AI summary
The present invention relates in particular to a security strip (1) to be partially embedded into the structure of a security document (2) at least partially made of fibers, said strip being flush at the surface of the document in the form of a set of windows (F), and including a transparent or translucent support material which is coated on one so-called upper surface thereof with a coating that is visible by means of reflection, and which includes a longitudinal strip (3) which is at least partially free of said coating and which separates first and second thread-forming areas (4, 4') coated with said coating, characterized in that each of the thread-forming areas (4, 4') has two different optical renderings and/or patterns that are visible by means of reflection, respectively, and in that said thread-forming areas include negative patterns (M) referenced relative to one another, respectively, i.e. at least one pair of said referenced patterns always has the same spacing pitch along said areas.