Twisted Pair Cable Identification via Physical Indicia
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Solution Overview
Problem
Conventional twisted pair communication cables rely on colorants for identification, which increase costs and environmental impact, prompting the need for cables that minimize or eliminate colorants while maintaining proper identification of twisted pairs and conductors.
Innovation Solution
The development of twisted pair communication cables that use minimal or no colorants by incorporating physical indicia, such as raised or indented portions, texturing, and limited colorant markings on insulation, separators, and shield layers to facilitate identification without the need for colored insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If colorants are used in cable insulation to identify twisted pairs and conductors, then identification is facilitated, but cost and environmental impact increase
Solution Approach 1:
The patent extracts and removes colorants from the cable insulation material, replacing them with physical indicia such as raised portions, indented portions, and texturing on the insulation surface. This eliminates the harmful chemical substances while maintaining identification capability through tactile and visual physical features.
Solution Approach 2:
The patent transitions from using color changes (colored insulation) to using physical surface variations (raised, indented, textured portions) for identification. This principle applies by changing the identification mechanism from chemical/optical (color) to physical/tactile (surface geometry), thereby eliminating colorants while preserving identification function.
2Object-generated harmful factors
If colorants are eliminated from cable insulation, then environmental impact and cost are reduced, but identification of twisted pairs and conductors becomes difficult
Solution Approach 1:
The patent introduces physical indicia (raised portions, indented portions, texturing) as an intermediary element between the insulation material and the identification function. These physical features serve as mediators that enable identification without requiring colorants, thus resolving the contradiction between eliminating harmful substances and maintaining identification capability.
Solution Approach 2:
The patent applies the principle of changing the identification mechanism from color-based to physical surface variation-based. By using raised, indented, and textured portions on the insulation surface, the patent provides tactile and visual identification cues that replace the function of colorants, thereby maintaining ease of operation while eliminating harmful chemicals.
3Object-generated harmful factors
If physical indicia are added to insulation to replace colorants, then colorant usage is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent merges the identification features directly into the insulation extrusion process itself. The raised portions, indented portions, and texturing are formed as integral parts of the insulation material during extrusion, rather than being added as separate post-processing steps. This integration reduces manufacturing complexity while achieving the goal of eliminating colorants.
Solution Approach 2:
The patent changes the physical parameters of the insulation surface during the extrusion process to create raised, indented, and textured portions. By modifying surface geometry parameters rather than adding separate identification components, the patent reduces manufacturing complexity while successfully replacing colorant-based identification systems.
Data Source
AI summary
Twisted pair communication cables that include reduced or minimal use of colorant may include a plurality of twisted pairs of individually insulated conductors, and the respective insulation formed around each conductor included in the plurality of twisted pairs may not be blended or compounded with any colorant. Physical indicia may be selectively formed on respective outer surfaces of the insulation of at least two of the plurality of twisted pairs. The physical indicia may include colorant that occupies less than 5.0% of a surface area of the insulation on which it is formed, and the physical indicia facilitate identification of the plurality of twisted pairs. A jacket may formed around the plurality of twisted pairs.