Offset Seams in Protective Apparel Sleeve

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Solution Overview

Problem

Existing liquid-resistant protective apparel sleeves face challenges in providing enhanced liquid resistance without increasing manufacturing costs or compromising comfort, as traditional stitched seams allow liquid permeation and require additional seam sealants.

Innovation Solution

The use of membrane laminated or coated fabrics for both inner and outer plies in the sleeves, combined with offset stitching, enhances liquid resistance without the need for seam sealants, maintaining comfort and low production costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If traditional stitched seams are used in protective apparel sleeves, then manufacturing cost and ease of manufacture are improved, but liquid resistance deteriorates due to needle holes allowing liquid permeation

Engineering Contradiction:

Improveease of manufactureVSAvoidliquid resistance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The sleeve is divided into multiple plies (inner ply and outer ply) with offset seams, creating segmented stitching patterns that prevent liquid permeation through needle holes while maintaining the benefits of stitched-seam construction

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention uses composite fabric structures with multiple plies and offset seams to achieve both liquid resistance and ease of manufacture, combining the advantages of different construction approaches without requiring seam sealants

Inventive Principle:

Principle #40Composite materials

2Reliability

If seam sealants such as heat-applied tape or glue are applied to stitched seams, then liquid resistance is improved, but manufacturing cost and device complexity increase

Engineering Contradiction:

Improveliquid resistanceVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention extracts and eliminates the need for seam sealants by using offset seam construction alone, removing the disturbing element (sealants) while maintaining liquid resistance through clever seam positioning

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

By segmenting the seam locations into offset positions between inner and outer plies, the invention achieves liquid resistance without requiring additional sealant materials or application processes

Inventive Principle:

Principle #1Segmentation

3Reliability

If seam sealants are applied to enhance liquid resistance, then liquid resistance is improved, but comfort deteriorates due to reduced breathability and softness

Engineering Contradiction:

Improveliquid resistanceVSAvoidcomfort

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The invention removes seam sealants from the sleeve construction, eliminating the harmful effect on comfort while maintaining liquid resistance through offset seam positioning that prevents liquid permeation without compromising breathability or softness

Inventive Principle:

Principle #2Taking out (Extraction)

4Reliability

If membrane laminated or coated fabrics are used instead of traditional fabrics, then liquid resistance is improved, but weight and manufacturing cost increase

Engineering Contradiction:

Improveliquid resistanceVSAvoidweight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The invention uses offset seam construction between inner and outer plies to achieve liquid resistance without requiring heavy membrane laminated or coated fabrics, maintaining light weight through clever structural design rather than material substitution

Inventive Principle:

Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach provides enhanced liquid resistance while maintaining the comfort and affordability of conventional stitched-seam sleeves, meeting stringent liquid-resistance standards without significant weight or cost increases.

Implementation Method 1

utilizing a first membrane laminated or coated fabric instead of the inner ply, and a second membrane laminated or coated fabric instead of the outer ply

Methodology Applied

Scientific EffectMembrane lamination or coating:

Data Source

PatentUS7752680B2Protective-apparel sleeve and protective apparel incorporating same

Publication Date: 2010.07.13 STANDARD TEXTILE COMPANY

AI summary

A protective-apparel sleeve (10) includes a tubular inner piece (12) of membrane laminated or coated fabric and a tubular outer piece (14) of membrane laminated or coated fabric generally surrounding the tubular inner piece (12). In further detail, the tubular inner piece (12) includes a stitched seam (24) along its length, and the tubular outer piece (14) includes a stitched seam (26) along its length which is circumferentially offset from the seam (24) of the tubular inner piece (12). If desired, the stitched seams (24, 26) may be generally free of a seam sealant. The protective-apparel sleeve (10) and protective-apparel products incorporating the sleeve (10) have a significantly greater liquid-resistance than conventional stitched-seam protective-apparel sleeves and protective-apparel products incorporating such sleeves. This enhanced liquid-resistance is achieved without a significant increase in acquisition costs, processing costs, and sleeve weight, and without sacrificing the comfortable feel typically associated with stitched-seam protective-apparel sleeves and protective-apparel products incorporating such sleeves.