Hand Tool Edge Tester Diagonal Tape Cutting Profile
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for testing knife blade sharpness are either inaccurate, require manual skill, or are not suitable for industrial use, as they often rely on crude measurements or risk user safety, and there is a need for a reliable and efficient way to determine when a knife blade needs sharpening, especially in high-volume cutting environments like meat processing plants.
Innovation Solution
A hand tool edge tester that secures the knife handle stationary and uses a motorized tape carriage with a cuttable substrate to measure the cutting force along the blade's edge, providing a precise cutting profile through a load cell, allowing for accurate assessment of sharpness and smoothness by moving the tape diagonally to ensure uniform resistance and avoid tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual sharpening methods are used, then skill and expertise are required to achieve correct edge angles, but this increases device complexity and difficulty of operation
Solution Approach 1:
The patent replaces manual mechanical sharpening operations with an automated testing system that uses a load cell to measure cutting forces. Instead of requiring operators to manually grind blades at precise angles, the system objectively measures edge quality through force measurements, eliminating the need for complex manual sharpening devices and expert skill.
Solution Approach 2:
The testing system provides automated measurement and evaluation of blade sharpness without requiring operator intervention for skill-based judgments. The load cell automatically measures cutting forces and the system independently determines edge quality, replacing the need for human expertise in assessing blade condition.
2Measurement precision
If crude measurement methods are used, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent replaces crude visual or manual assessment methods with an instrumented testing system that uses a load cell to objectively measure cutting forces. This mechanical measurement system provides precise, quantifiable data about blade sharpness and edge quality, transforming subjective assessments into objective mechanical measurements.
Solution Approach 2:
The load cell acts as an intermediary between the blade and the measurement system, translating cutting actions into quantifiable force measurements. This intermediary device enables precise measurement of cutting forces without requiring complex direct observation or manual evaluation methods.
3Ease of operation
If manual cutting tests are used, then ease of operation is improved, but object-affected harmful factors increase due to user safety risks
Solution Approach 1:
The load cell serves as a safety intermediary by placing the testing media between the operator and the blade. This configuration allows the blade to cut the media while the load cell measures forces, eliminating the need for operators to manually handle sharp blades and thereby removing injury risks while maintaining operational simplicity.
Solution Approach 2:
The patent converts the potentially harmful interaction between a sharp blade and human skin into a beneficial measurement by having the blade cut a sacrificial testing media instead. The cutting action that would be dangerous to operators is redirected onto an inanimate substrate, transforming a safety hazard into a useful measurement opportunity.
4Productivity
If high-volume testing is required, then productivity increases, but device complexity increases to handle automation
Solution Approach 1:
The patent replaces manual testing operations with an automated system that uses a motorized carriage to move the testing media through the blade. This mechanical automation increases testing throughput by eliminating manual setup and measurement steps, allowing high-volume testing without requiring proportionally increased operator involvement.
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 enables quick and accurate evaluation of knife blade sharpness and smoothness, reducing the risk of user injury and improving cutting efficiency by providing a reliable profile of the cutting edge, ensuring knives are sharpened only when necessary, thus enhancing production quality and worker safety.
Implementation Method 1
A hand tool edge tester that secures the knife handle stationary and uses a motorized tape carriage with a cuttable substrate to measure the cutting force along the blade's edge, providing a precise cutting profile through a load cell
Data Source
AI summary
A hand tool edge tester for evaluating the sharpness and smoothness of the cutting edge of a blade for the hand tool like a knife is provided according to the invention. The knife blade is held stationary along a horizontal, longitudinal axis. A long piece of solid tape of the cuttable substrate material like Teflon moved within a reel-to-reel tape mechanism attached to a tape carriage travels simultaneously horizontally as the tape carriage moves along a longitudinal axis, and along an upwardly inclined, diagonal pathway defined by the reel-to-reel mechanism. The blade of the hand tool slices the upwardly, diagonally moving tape ribbon with the load cell measuring the cutting force exerted by the tape ribbon against the blade as it is moved along the distance of the cutting edge substantially between the hand tool handle and the blade tip. The diagonal axis for the path of the traveling cuttable substrate media tape allows the knife blade to cut the tape more easily without tearing, along with an approximate 90° angle between the blade tip and the cutting media pathway, thereby providing a more accurate measurement by the load cell of the tip portion of the blade as it slices the tape. The cutting force data produced by the load cell yields a cutting profile for the cutting edge along the hand tool blade to indicate the relative sharpness and smoothness of the cutting edge.