Outline void pattern tufting yarn interface

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Solution Overview

Problem

In the production of tufted textiles, hollow needle tufting machines tend to cause adjacent yarn colors to blur or lose sharp lines at interfaces, leading to undesirable sawtooth patterns or 'out-of-focus' designs, especially when intricate patterns are involved.

Innovation Solution

The implementation of a software algorithm in tufting machines that allows for the optional omission of the last stitch of a particular color, creating a no-sew position on the backside but maintaining clarity on the front face by reducing overlap or intermixing of adjacent yarns.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If hollow needle tufting machines are used to place yarns, then productivity and automation are improved, but manufacturing precision deteriorates due to yarn spread and blurred color interfaces

Engineering Contradiction:

Improvetufting production efficiencyVSAvoidcolor interface sharpness

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent extracts and removes the problematic half-stitch yarn placements at color transition points. By identifying and eliminating these specific yarn insertions that cause spread and blurring, the system maintains the benefits of automated hollow needle tufting while preventing the precision deterioration at color interfaces.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system performs preliminary analysis of the tufting pattern to identify color transition points before actual tufting occurs. This allows the control system to pre-determine which stitches should be omitted at interfaces, preventing yarn spread issues before they occur and maintaining sharp color boundaries.

Inventive Principle:

Principle #10Preliminary action

2Loss of information

If the tufting machine places every stitch according to the pattern, then completeness of the pattern is improved, but manufacturing precision deteriorates due to yarn overlap and intermixing at color interfaces

Engineering Contradiction:

Improvepattern completenessVSAvoidcolor transition sharpness

Core Design Contradiction:

Loss of informationVSManufacturing precision

Solution Approach 1:

The patent converts the potentially harmful effect of omitted stitches at color interfaces into a beneficial feature. By strategically removing half-stitches at transition points, the system creates clean separation between colors, transforming what could be seen as incomplete pattern coverage into a precision-enhancing feature that eliminates yarn intermixing.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The system applies different treatment to different locations in the pattern. At color transition points, stitches are selectively omitted to prevent spread, while in other areas all stitches are placed according to the pattern. This localized quality adjustment maintains pattern completeness where needed while achieving sharp color interfaces where required.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12203200B2Outline void pattern

Publication Date: 2025.01.21 TUFTCO CORP

AI summary

A method for automatedly inserting void stitches in the manufacture of pixel mapped patterns on tufting machines having an array of independent yarn feed devices feeding yarns to reciprocating needles employs an algorithm to determine if a stitch should have a void substituted for the stitch and then implemented.