Slide Fastener Gap Width for Color Visibility
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Solution Overview
Problem
Conventional slide fasteners fail to adequately exhibit the color of fastener element rows when used in an overturned configuration, as the gap between the fastener tapes is minimized to make the elements less visible, thereby limiting the enhancement of coloring design properties.
Innovation Solution
A slide fastener design where the fastener tapes and element rows are colored differently, with a controlled gap width of 10 to 25% of the engaged element rows' width, allowing the element rows' color to be visible from the front side, and using a sewing method with a guide section to set the gap during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the gap between fastener tapes is minimized to make fastener element rows less visible, then the visibility of fastener element rows is reduced, but the coloring design properties cannot be adequately exhibited
Solution Approach 1:
The patent applies parameter changes by optimizing the gap width between fastener tapes to a specific range (10-25% of the width of engaged fastener element rows). This quantitative parameter adjustment allows the fastener element rows to remain visible enough to exhibit coloring design properties while maintaining the desired aesthetic effect of reduced visibility, thus resolving the contradiction between visibility reduction and design property exhibition.
2Ease of manufacture
If the gap between fastener tapes is increased to exhibit the color of fastener element rows, then the coloring design properties are enhanced, but the fastener element rows become too visible
Solution Approach 1:
The patent resolves this contradiction by establishing an optimal parameter range for the gap width (10-25% of the width of engaged fastener element rows). This parameter optimization ensures that the gap is wide enough to allow the color of fastener element rows to be visible and exhibit coloring design properties, while simultaneously keeping the visibility at an aesthetically acceptable level, thus balancing both requirements.
3Ease of manufacture
If the fastener tapes and element rows are colored differently to enhance contrast, then the coloring design properties are improved, but the color visibility through the gap is insufficient when used conventionally
Solution Approach 1:
The patent addresses this contradiction by changing the geometric parameter of the gap width to 10-25% of the width of engaged fastener element rows. This parameter adjustment ensures that sufficient light can pass through the gap to reveal the color of the fastener element rows, thereby enhancing color visibility and allowing the coloring design properties to be fully exhibited when the fastener is used in the overturned configuration.
Data Source
AI summary
There is provided a slide fastener. A pair of fastener element rows are respectively sewn to opposing tape side edge portions of a pair of fastener tapes with sewing threads. Each of the fastener element rows has a plurality of fastener elements. A slider is configured to engage and disengage the pair of fastener element rows. The pair of fastener tapes and the pair of fastener element rows are colored in different colors. The slide fastener is used such that the fastener element rows are at a back side. A width dimension of a gap between the pair of fastener tapes is set to be 10 to 25% of a width dimension of the pair of fastener element rows that are engaged with each other. The color of the fastener element rows is visible through the gap from a front side of the slide fastener.