Nondestructive Paper Bobbin Inspection via Optical Diffusivity
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Solution Overview
Problem
There is a need for a nondestructive, automated, and cost-effective method to verify the physical properties of paper webs used in smoking articles, such as air permeability and gas diffusion, to ensure consistency and quality before they are used in manufacturing, while also being environmentally friendly.
Innovation Solution
An apparatus that includes a drive system, pattern detection device, and testing devices to nondestructively determine porosity and diffusivity of paper webs, allowing for the identification of defective sections and automatic removal or further testing, with the ability to handle large rolls of paper and provide regular evaluations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional destructive testing methods are used to verify paper web properties, then measurement accuracy is improved, but the paper web is damaged and cannot be used for manufacturing
Solution Approach 1:
The patent replaces destructive mechanical testing methods with nondestructive optical and electrical measurement systems. The apparatus uses light sources, detectors, and electrical circuits to measure paper web properties such as porosity, diffusivity, and other physical characteristics without physically damaging the material, thereby eliminating material loss while maintaining measurement accuracy.
Solution Approach 2:
The patent introduces intermediary measurement fields (optical and electrical) that interact with the paper web to extract property information without causing damage. These intermediary fields serve as mediators between the measurement system and the paper web, enabling indirect measurement of properties that traditionally required direct physical contact or destruction.
2Productivity
If manual inspection methods are used for paper webs, then equipment complexity is reduced, but productivity and consistency are worsened
Solution Approach 1:
The patent implements continuous inspection capabilities where the paper web moves through the measurement apparatus without interruption. The system continuously measures properties as the paper web passes through, eliminating the need to stop for manual sampling and providing real-time quality data, thereby significantly improving productivity and consistency.
Solution Approach 2:
The apparatus is designed to automatically measure and evaluate paper web properties without requiring manual intervention. The system self-regulates the measurement process, data collection, and quality assessment, reducing operational complexity while maintaining high throughput and consistent results through automated control mechanisms.
3Reliability
If comprehensive quality testing is performed on entire paper webs, then product quality is improved, but time consumption and cost increase
Solution Approach 1:
The patent performs preliminary quality assessment by measuring multiple properties simultaneously as the paper web passes through the apparatus once. By conducting porosity, diffusivity, and other measurements in a single pass before the paper web is used in manufacturing, the system ensures comprehensive quality verification without requiring multiple sequential testing steps, thereby reducing time consumption while maintaining reliability.
4Object-affected harmful factors
If environmental-friendly testing methods are used, then environmental impact is reduced, but measurement capability may be limited
Solution Approach 1:
The patent replaces environmental impactful testing methods with optical and electrical measurement techniques that do not consume or contaminate the paper web. The system uses light transmission, reflection, and electrical property measurements that leave no residue and generate minimal waste, maintaining full measurement precision while being environmentally friendly.
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
Enables efficient and consistent determination of paper web properties, ensuring quality and reducing waste by identifying and removing defective sections, thus improving the manufacturing process and product quality while being environmentally friendly.
Implementation Method 1
testing devices to nondestructively determine porosity and diffusivity of the paper web
Implementation Method 2
pattern detection device
Data Source
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AI summary
An apparatus adapted to examine a paper web includes a rotatable first bobbin, a rotatable second bobbin, and a first testing device. The first bobbin has a paper we wound thereabout that has transverse bands spaced apart along a length thereof. The second bobbin is arranged to receive the paper web from the first bobbin with a paper web path defined between the first and second bobbins. The first testing device is disposed along the paper web path and is arranged to nondestructively measure a diffusivity of one of the transverse bands of the paper web.