Folded Fastener Tape with Thermal Bonding for Comfort Shielding

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Solution Overview

Problem

Existing slide fasteners often cause discomfort due to direct contact with hard metal or resin components, and previous solutions like sewing fabric tapes onto fastener tapes result in inferior fixation, appearance defects, and incomplete shielding of slider and fastener elements.

Innovation Solution

A fastener tape design where one side is folded to create a bent part, dividing the tape into two parts with a fixing holding part to maintain the folded state, preventing warping and effectively shielding the slider and fastener elements, and a manufacturing device to produce this tape without sewing, using thermal welding or adhesives for fixation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a fabric tape is sewn on the fastener tape to shield the slider and fastener element, then the shielding effect is improved, but the fixation ability deteriorates and sewing threads remain causing appearance defects

Engineering Contradiction:

Improveshielding effectVSAvoidfixation ability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent replaces the mechanical sewing system with a thermal bonding system. The fastener tape body is folded back and thermally bonded to itself, eliminating the need for separate fabric tapes and sewing threads. This substitution resolves the contradiction by providing both shielding effect and reliable fixation without appearance defects.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent merges the shielding function and the fixation function into a single integrated structure. The fastener tape body serves both as the base material and as the shielding cover by folding back onto itself. This merging eliminates the need for additional components and resolves the contradiction between shielding effect and fixation ability.

Inventive Principle:

Principle #5Merging (Combining)

2Object-affected harmful factors

If a fabric tape is sewn on the fastener tape to shield the slider and fastener element, then the shielding effect is improved, but the operation becomes troublesome and sewing threads remain causing appearance defects

Engineering Contradiction:

Improveshielding effectVSAvoidoperation convenience

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The patent replaces the complex sewing operation with a simple folding and thermal bonding operation. The fastener tape body is folded back and bonded to itself, eliminating the need for sewing machines and threads. This substitution resolves the contradiction by providing both shielding effect and operational simplicity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Object-affected harmful factors

If the fastener tape body is folded to shield the slider and fastener element, then the shielding effect is improved, but the folded state may warp without proper fixation

Engineering Contradiction:

Improveshielding effectVSAvoidfolded state stability

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent uses thermal bonding to replace mechanical sewing for fixing the folded state. The folded fastener tape body is thermally bonded to itself, creating a stable fixed point that prevents warping while maintaining the shielding effect.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the physical state of the fastener tape body at the folded point through thermal bonding. This parameter change (from mechanical to thermal fixation) ensures the folded state remains stable and prevents warping while maintaining the shielding function.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11140950B2Fastener tape, slide fastener and fastener tape manufacturing device

Publication Date: 2021.10.12 YKK CORP

AI summary

The disclosure discloses a fastener tape, a slide fastener and a fastener tape manufacturing device. The fastener tape includes a fastener tape body and a fastener element fixed to a first side of the fastener tape body. A second side of the fastener tape body is folded toward a back side of the fastener tape body, and a bent part extending along a length direction of the fastener tape is formed after the folding. The bent part divides the fastener tape body into a first fastener tape part and a second fastener tape part respectively located on a front surface and a back surface of the fastener tape body. Moreover, a fixing holding part is further disposed between the first fastener tape part and the second fastener tape part for maintaining the folded state of the fastener tape body.