Security Substrate with Segmented Elongate Elements
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Solution Overview
Problem
Existing methods for embedding wide security threads in paper substrates face limitations in thread width, leading to defects such as poor window definition and increased paper machine complexity, which restricts the visual impact and production efficiency.
Innovation Solution
Embedding two elongate security elements in close proximity within the substrate, each with a width of less than 6 mm, running substantially parallel to each other with a gap of no greater than 10 mm, to enhance visual impact and security features without increasing paper thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single wide security thread is embedded in the substrate, then the visual impact and security effectiveness are improved, but the paper thickness increases and production defects occur
Solution Approach 1:
The patent divides a single wide thread into multiple separate elongate security elements (e.g., two threads instead of one wide thread). Each element maintains a width of less than 6mm, preventing the thickness and defect problems associated with wide threads, while collectively providing equivalent or enhanced visual impact through their distributed arrangement and interaction with the substrate.
2Illumination intensity
If the thread width is increased to enhance visual impact, then the security effectiveness improves, but the paper machine complexity and production costs increase
Solution Approach 1:
The patent employs multiple thin elongate security elements (each <6mm wide) rather than attempting to process a single wide thread through the paper machine. This segmentation approach simplifies the paper machine requirements and reduces production complexity while achieving enhanced visual impact through the collective presence of multiple elements.
3Device complexity
If a single wide thread is used, then the security feature is simplified, but the quality control during paper inspection becomes more difficult
Solution Approach 1:
The patent segments the security feature into multiple discrete elongate elements, each maintaining a width of less than 6mm. This segmentation creates distinct, easily detectable features during paper inspection that are less likely to be missed or misidentified, improving quality control while maintaining reasonable feature complexity.
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 approach significantly increases the visual impact and security benefits by creating a larger perceived area, complexity, and unexpectedness, while reducing production costs and equipment complexity, and improving quality control during paper inspection.
Implementation Method 1
the shape of the bridges, which are formed between the windows, is modified to allow for improved water dispersion and to prevent the bridges splitting as the paper passes through the press section of the paper machine
Implementation Method 2
After the paper is fully formed and couched from the cylinder mould cover, the water is extracted from the wet fibre mat and the paper is passed through a drying process
Implementation Method 3
the water is extracted from the wet fibre mat and the paper is passed through a drying process
Data Source
AI summary
The present invention is concerned with providing security substrates, and documents made therefrom, such as banknotes, with features for visual inspection by members of the public. More specifically the invention relates to a novel security substrate containing at least two elongate security elements for the purposes of public and non-public verification. The security substrate comprises a substrate and at least two elongate security elements each having a width of less than or equal to 6 mm. The security elements are at least partially embedded within the substrate and running substantially parallel to each other with a gap therebetween of no greater than 10 mm. The total cross-directional width of a zone occupied by the two security elements and the gap is less than or equal to 18 mm.