Razor Blade Testing Apparatus for Edge Damage Measurement
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Solution Overview
Problem
Current methods for testing razor blade tip bending resistance lack a standardized and repeatable simulation of shaving conditions, making it difficult to accurately determine the number of uses before a cartridge needs to be discarded.
Innovation Solution
A testing apparatus comprising a base, material support table, transport carriage, and blade retention assembly that simulates a shaving environment by moving a razor blade across a material sample, allowing for measurement of edge damage and tip bending resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current testing methods are used, then testing can be performed, but the testing lacks standardized and repeatable simulation of shaving conditions
Solution Approach 1:
The patent uses a material sample with synthetic fibers that copies the essential characteristics of human hair to create a standardized test medium. This synthetic material sample replicates the shaving conditions consistently across multiple tests, enabling reliable and repeatable measurement of edge damage without the variability inherent in testing on actual human hair.
2Measurement precision
If a standardized testing simulation is implemented, then measurement precision improves, but device complexity increases
Solution Approach 1:
The testing apparatus is divided into distinct functional modules: a material support table for holding the synthetic fiber sample, a transport carriage for moving the sample through the testing zone, and a blade retention assembly for securing the razor blade. This segmentation allows each component to perform its specific function independently, simplifying the overall design while maintaining standardized testing capabilities.
Solution Approach 2:
The material sample with synthetic fibers serves multiple functions: it provides a standardized testing surface, simulates hair resistance, and enables consistent edge damage measurement. The transport carriage simultaneously positions the sample and maintains it throughout the testing process, reducing the need for additional specialized components.
3Measurement precision
If repeatable shaving simulation is achieved, then testing accuracy improves, but time for testing increases
Solution Approach 1:
The transport carriage continuously moves the material sample through the testing zone during the shaving simulation, maintaining constant contact between the blade and sample without interruption. This continuous action eliminates idle time between measurement cycles and ensures consistent testing conditions throughout the entire testing process.
Data Source
AI summary
An apparatus for testing a razor blade comprises a base, a material support table, a material sample, a transport carriage, a blade retention assembly, and a razor blade. The material support table is supported by the base. The transport carriage is movably coupled with the base and is movable with respect to the material support table between a start position and an end position. The blade retention assembly is movably coupled with the transport carriage and is movable with respect to the material support table between a blade-engaged position and a blade disengaged position. The blade retention assembly is movable together with the transport carriage between the start position and the end position. The blade is releasably attached to the blade retention assembly. The razor blade contacts the material sample when the blade retention assembly is in the blade-engaged position. Methods are also provided.