Fabric containing a conductive yarn and apparatus for making the same

Abstract

A fabric and an apparatus for making the same are disclosed. A conductive yarn has a non-conductive core thread and a fine metal thread wound around the surface of the non-conductive core thread. The fine metal thread is guided by an apparatus to wind around the surface of the non-conductive core thread in a spiral form. The apparatus has a base station, an axle on the base station, and a spool set on the axle for twisting the fine metal thread. The core thread passes through the center of the axle, and the axle is driven by a power to drive the spool to rotate, thuds winding the fine metal thread around the surface of the non-conductive core thread so as to form an elastic and flexible conductive yarn.

What is claimed is: 
     
         1 . A fabric comprising:
 a plurality of conductive metal wires extending in a warp direction, which are limited to two sides of the fabric in  0 . 5  to  0 . 6  centimeters,   a plurality of non-conductive threads extending in the warp direction, which are limited to a central section part of the fabric, and:   a plurality of conductive yarns extending in a weft direction, whereby interlacing the fine metal threads of the conductive yarn with the conductive metal wires of the warp direction to form a conductive fabric.   
     
     
         2 . The fabric as recited in  claim 1  wherein the conductive yarn
 Includes: 
 a non-conductive core thread, made of a plurality of fibers; and; 
 a fine metal thread, wound around the surface of the non-conductive core thread, wherein the fine metal thread is wound around the surface of the core thread in a spiral form to form the conductive yarn. 
 
     
     
         3 . The fabric as recited in  claim 2 , wherein the diameter of the conductive metal wire ranges from 0.05 to 0.12 m/m. 
     
     
         4 . The fabric as recited in  claim 3 , wherein the diameter of the fine metal thread ranges from 0.02 to 0.12 m/m. 
     
     
         5 . The fabric as recited in  claim 4 , wherein the fine metal thread wound around the non-conductive core thread is wound at 70 to 125 coli per centimeter of the non-conductive core thread. 
     
     
         6 . The fabric as recited in  claim 5 , wherein a power supply unit provides 0 to 24 Volts direct current when the fabric is conducted.