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Warp crimp fabric

Inactive Publication Date: 2006-07-20
CHALLENGE SAILCLOTH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heretofore this distribution of crimp has been very difficult to control.
Furthermore the crimp in high beat up fabrics tends to go almost entirely into the warp yarns during the weaving process.
There is very little excess weft yarn available to do the crimping.
The amount of weft crimp which can come from this fabric narrowing is very limited because the loom will not weave if the fabric is substantially narrower than the reed width.
When the fabric narrows substantially the reed has trouble pushing the picks in and the warp yarns near the selvage are subject to severe abrasion where they go through the reed.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Warp crimp fabric
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Examples

Experimental program
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Embodiment Construction

[0012] Pre-crimped (or elastic) synthetic elastic yarn is used in the weft of the fabric when weaving. Non crimped yarn is used in the warp direction. The pre-crimped or elastic weft yarn contains extra length. This allows the weft yarns to take up the crimp during weaving allowing the warp yarns to remain predominately straight with very little crimp. During the weaving action the warp and weft yarns push against each other. Whichever can crimp more easily takes up the most crimp. With the elastic pre-crimped yarn the weft can and does take up most of the crimp. The warp yarns which do not contain the pre-crimping therefore tend to remain straighter and nearly crimp-free.

[0013] There are many ways to pre-crimp the yarn.

[0014] The crimp can be set in the yarn by passing the yarn over hot gears as in FIG. 4.

[0015] The yarn can be twisted then heat set to lock in the twist. The yarn is then untwisted The natural tendency for the yarn is to revert to its heat set twisted configurati...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

A method for weaving extremely low warp crimp fabrics is introduced. The weft yarns are allowed to take up the crimp in the fabric by weaving with pre-crimped weft yarn.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] This application claims priority to U.S. Application Ser. No. 60 / 640,188 and incorporating that provisional application by reference.FIELD OF THE INVENTION [0002] The present invention relates generally to weaving fabric on a loom. BACKGROUND OF THE INVENTION [0003] Textile fabrics woven on any type of loom are comprised of warp and weft yarns which cross over and under each other. The warp constitutes the yarns which run lengthwise in the fabric, and the weft constitutes the yarns which run in the direction of the fabric's width. The over and under interlacing involves crimping of the yarns as the weaving takes place. Crimp in a fabric is measured by first marking gage marks on the fabric with crayon or ink, for example exactly 1 meter apart on one of the yarns in the fabric. The marked yarn is then unraveled out of the fabric. The unraveled yarn is straightened out and its length is then measured. The excess length of the yarn over 1 m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D03D23/00
CPCD03D13/00D03D23/00
Inventor CRONBURG, TERRY L.
Owner CHALLENGE SAILCLOTH