Method of making a cleaning article having cutouts
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Solution Overview
Problem
Existing cleaning articles with tow fibers fail to effectively capture and retain a wide range of debris, including dense granular and low-density, voluminous debris, due to uniform tuft spacing that does not account for differences in debris size and density.
Innovation Solution
A method of creating cleaning articles with irregularly spaced tufts of tow fibers by cutting out spaces in a precursor sheet to unequally space tufts, allowing for differential tuft density and spacing that intercepts and retains various types of debris, including larger debris in the spaces between tufts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform tuft spacing is used in cleaning articles, then manufacturing simplicity is maintained, but debris capture effectiveness across different sizes and densities is reduced
Solution Approach 1:
The patent applies local quality by varying the spacing of tufts across different regions of the cleaning article. Specifically, the tufts are arranged with different spacing intervals in different zones to optimize capture of different types of debris. This allows the cleaning surface to have different properties in different locations, improving overall debris capture effectiveness while maintaining a relatively simple manufacturing process through patterned cutting or spacing during production.
Solution Approach 2:
The patent segments the cleaning article surface into different zones with different tuft spacing patterns. By dividing the uniform surface into segmented regions with varying tuft densities, the design can simultaneously address capture of both dense granular debris (in closer-spaced regions) and low-density voluminous debris (in wider-spaced regions), thereby improving overall reliability without completely redesigning the manufacturing process.
2Ease of manufacture
If regular tuft patterns are used, then manufacturing consistency is maintained, but adaptability to different debris types is reduced
Solution Approach 1:
The patent maintains manufacturing consistency through systematic production methods while incorporating varied tuft spacing patterns that provide adaptability to different debris types. The consistent element is the methodical application of different spacing patterns across zones, which can be implemented through standardized cutting or positioning processes, while the varied patterns themselves provide the adaptability needed for different debris characteristics.
Solution Approach 2:
The patent creates a multi-functional cleaning surface where different zones serve different functions based on their tuft spacing. This universal design allows a single cleaning article to effectively handle multiple types of debris (both dense granular and low-density voluminous) through its varied zones, thereby achieving adaptability while maintaining a consistent manufacturing approach for creating the patterned structure.
Data Source
AI summary
A method of making a cleaning article. The cleaning article has discrete tufts of tow fibers. The discrete tufts are unequally spaced from adjacent tufts, to provide improved collection and retention of debris from a target surface. The cleaning article may be made by cutting out spaces between tufts from a precursor sheet. Optionally the precursor sheet may be attached to a carrier sheet.