Mascara Brush Bristle Configuration for Volume Separation
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Solution Overview
Problem
Current mascara brushes lack specifications for optimal bristle configuration, making it difficult to determine the best ratio of volume to separation, which is crucial for effective mascara application.
Innovation Solution
A mascara brush design featuring bristles with a solid round or oval cross-section, a twisted wire core holding 11 to 13 bristles per turn, and an average brush diameter between 7.4 mm to 8.2 mm, combined with specific manufacturing processes and materials like nylon or polyamide, to achieve a superior volume to separation ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If bristle configuration specifications are not standardized, then manufacturers have flexibility in design, but optimal volume to separation ratio cannot be achieved
Solution Approach 1:
The patent applies parameter changes by specifying precise bristle diameter (0.006 inches), wire diameter (0.050-0.063 inches), and bristles per turn (11-13). These standardized parameters transform the brush from a generic component to a precisely controlled device that achieves optimal volume to separation ratio through defined geometric characteristics.
Solution Approach 2:
The patent segments the brush structure into distinct standardized components: bristles of specific diameter, wire of specific thickness, and a defined number of turns (11-13 bristles per turn). This segmentation allows each parameter to be independently controlled and optimized, resolving the contradiction between precision and complexity.
2Quantity of substance
If bristle diameter is increased to maximize volume, then volume output improves, but separation capability deteriorates
Solution Approach 1:
The patent applies local quality by specifying that bristles have a solid round cross-section with a precise diameter of 0.006 inches. This uniform local characteristic ensures that each bristle provides consistent performance, achieving optimal balance between volume deposition and separation capability through standardized local geometry rather than varying sizes.
Solution Approach 2:
The patent resolves the volume-separation contradiction through parameter changes by defining the bristle diameter as exactly 0.006 inches and the wire diameter as 0.050-0.063 inches. These specific parameter values create the optimal balance point where sufficient volume is deposited while maintaining adequate separation, preventing both excessive bulk and excessive thinning.
3Quantity of substance
If the number of bristles per turn is increased to enhance volume, then mascara deposition improves, but brush diameter increases beyond optimal range
Solution Approach 1:
The patent applies asymmetry by specifying an odd number of bristles per turn (11-13), which creates an asymmetric distribution pattern around the wire core. This asymmetric configuration optimizes the spatial arrangement of bristles, allowing maximum deposition efficiency while maintaining a controlled brush diameter within the 0.250-0.313 inch range through non-uniform bristle positioning.
Solution Approach 2:
The patent resolves the deposition-diameter contradiction through parameter changes by defining the number of bristles per turn as 11-13 and the overall brush diameter as 0.250-0.313 inches. These specific parameters ensure that sufficient bristles are present for volume deposition while the brush remains compact enough for precise application, preventing excessive size increase.
Data Source
AI summary
A mascara brush includes from bristles, wherein the bristles have a solid round or oval cross section with a diameter of about 6 mil, a twisted wire core holding the bristles, the twisted wire core includes 11 to 13 bristles per turn (equivalent to 210˜270 bristles per standard size of 27 mm˜28 mm brush); and the brush has an average brush diameter between 7.4 mm to 8.2 mm.