Laser-Graved Container Substrates for Scanner-Readable Glass Marking
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Solution Overview
Problem
Conventional marking methods for containers, such as labels and ink-based codes, are inefficient, prone to fading, and difficult to read on complex or transparent surfaces like glass, leading to identification issues and potential health risks in the pharmaceutical industry.
Innovation Solution
A substrate with a marking element is created by controlling geometric and surface parameters, allowing for a high-contrast marking that can be read using conventional barcode scanners, even on transparent surfaces like glass, without additional coatings or materials, by varying the depth and surface roughness of graved portions within specific ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a label is glued on the container surface or a code is printed using ink, then the container can be identified with a unique identification code, but the process is slow and complicated, representing a bottleneck in the production line
Solution Approach 1:
The patent replaces mechanical labeling processes (gluing labels) and chemical printing processes (ink-based coding) with a laser-based marking system that directly modifies the container surface. This substitution eliminates the need for separate labeling equipment and processes, enabling direct integration into the production line and significantly improving productivity while maintaining identification accuracy.
Solution Approach 2:
The marking element is created during the container manufacturing process itself, before the container enters the main production line. By pre-forming the marking element as an integral part of the container structure, the patent eliminates subsequent labeling steps, thereby removing the production bottleneck while ensuring accurate identification from the outset.
2Area of stationary object
If the size of the printed code is reduced to fit small containers, then the code can be applied to smaller surfaces, but the code cannot be sufficiently reduced in size due to printing method limitations
Solution Approach 1:
The patent replaces ink-based printing with laser marking technology, which offers superior precision and scalability. The laser system can create extremely fine features and high-density patterns that are impossible with conventional printing methods, enabling code sizes to be reduced to fit even the smallest containers while maintaining manufacturing precision and readability.
Solution Approach 2:
The patent changes the fundamental parameters of the marking process by using laser energy density, pulse duration, and scanning speed instead of ink viscosity, print head speed, and dot matrix resolution. These parameter changes enable much finer feature sizes and higher information density, allowing codes to be scaled down to minimal areas without sacrificing manufacturing precision.
3Measurement precision
If a code is printed directly on the container using ink, then the identification can be provided on the container surface, but the code may vanish when the container is exposed to water or extreme conditions
Solution Approach 1:
The patent replaces chemical ink deposition with physical laser marking that modifies the container surface structure. The laser process creates permanent structural changes through ablation, melting, or recasting of the surface material, forming a marking element that is an integral part of the container. This eliminates the problem of ink fading or vanishing under extreme conditions, ensuring reliable identification accuracy throughout the container's lifecycle.
Solution Approach 2:
The marking element created by laser processing has a composite structure with different optical and physical properties compared to the base container material. The marked areas exhibit altered surface morphology, density, or crystalline structure that provides contrast for identification while maintaining the container's structural integrity and resistance to environmental factors, ensuring both durability and reliable detection.
4Reliability
If a marking element is graved into the glass surface using laser ablation, then the marking can be provided directly on the container with good durability, but the marking cannot be reliably read out with conventional barcode scanners due to glass transparency
Solution Approach 1:
The patent applies local quality changes to specific areas of the container surface through selective laser processing. Different regions of the container receive different treatments: some areas are ablated to create recesses, while others are recast or melted to create raised features. These localized structural variations create optical contrast that is detectable by conventional scanners, while the overall marking remains durable and integrated into the glass surface.
Solution Approach 2:
The patent transitions from two-dimensional surface markings to three-dimensional structural features. By creating raised and recessed areas through selective laser processing, the marking element gains depth and volumetric properties that interact with light in ways that create detectable contrast. This dimensional change allows conventional optical scanners to detect the marking despite the glass transparency, while maintaining the durability of laser-marked surfaces.
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 enables reliable, durable, and cost-effective identification of containers, resistant to environmental factors, without the need for additional infrastructure, ensuring accurate tracking and reducing the risk of incorrect identification.
Implementation Method 1
by laser ablation techniques or the like
Implementation Method 2
removing material from an area of a surface of the substrate using a material-removing-element, hence forming a cavity
Data Source
AI summary
A substrate includes a first surface area; and a second surface area with a second roughness value. In a height profile of the substrate along a cutting line crossing the first surface area and the second surface area, a height of the substrate along a first section of the height profile is larger than the height of the substrate along a second section of the height profile. In the height profile an absolute value of a height difference between a point of maximum height or an averaged height, respectively, of the second section and a point of minimal height or an averaged height, respectively, of the first section defines a depth value. A ratio of the depth value and the second roughness value is between 2 and 35. A marking element extends across the first surface area and the second surface area.