Sewing machine and the method for closing open end of tubular knitted article

Abstract

A sewing machine and the method for closing open end of tubular knitted articles. The sewing machine is configured to knit and close the open end of a tubular knitted article, comprising a frame, a knitting head and a thread cutter. The knitting head and the thread cutter are disposed rotatably on the frame, the knitting head has a needle, a needle-shaped hook and a knot making peg to form thread knots, and the thread cutter is configured to cut the knitting thread, wherein the thread cutter is configured in a fashion of making a relative movement to the knitting head.

What is claimed is: 
     
         1 . A sewing machine for knitting an open end of a tubular knitted article, comprises a frame, a knitting head mounted on the frame, and a thread cutter movably mounted on the frame, wherein the knitting head has a needle, a needle-shaped hook and a knot making peg for forming thread knots, the thread cutter use to cut the thread knots; and the sewing machine being characterized in that: the thread cutter is configured in a fashion that enables its movement relative to the knitting head. 
     
     
         2 . The sewing machine as claimed in  claim 1 , wherein the knitting head is movably deployed on the frame, and the thread cutter is actuated by means of the knitting head or an independent actuator. 
     
     
         3 . The sewing machine as claimed in  claim 1 , wherein the thread cutter is equipped to move along a circular trace, a linear trace, or a trace on a general plane. 
     
     
         4 . The sewing machine as claimed in  claim 1 , wherein the thread cutter having a cutter arm rotatable connected to the frame. 
     
     
         5 . The sewing machine as claimed in  claim 4 , wherein a stopper is mounting between the thread cutter and the knitting head. 
     
     
         6 . The sewing machine as claimed in  claim 1 , wherein an air suction inlet connected with the thread cutter in an operational manner. 
     
     
         7 . The sewing machine as claimed in  claim 6 , wherein the thread cutter has a fixed blade and a movable blade, and the air suction inlet is disposed behind the movable blade. 
     
     
         8 . The sewing machine as claimed in  claim 1 , wherein the knitting head is pivoted onto the frame and driven by a knitting head cam. 
     
     
         9 . The sewing machine as claimed in  claim 1 , wherein a distance between a position where the knitting knot is formed and the thread cutter is varies between 3 to 30 mm. 
     
     
         10 . The sewing machine as claimed in  claim 9 , wherein the distance is varied between 20 to 30 mm. 
     
     
         11 . A sewing method for closing an open end of tubular knitted article compatible with a sewing machine as claimed in  claim 1 , and its steps comprises:
 a plural pairs of stitches at an open end of the tubular knitted article being arranged along a semicircle, a thread being feed in the knitting head of said sewing machine to form thread knots to connect the pairs of stitches, and   once the process of the pairs of stitches being all completed, a knitting head of the sewing machine forming an extra thread knots to be cut by a thread cutter of the sewing machine;   wherein the thread cutter being relatively movable to the knitting head.   
     
     
         12 . A sewing method as claimed in  claim 11 , when the knitting head leaves another extra thread knot as a starting point for connecting a plural pairs of stitches of another tubular knitted article, the thread cutter being adopted to process cutting the another extra thread knot. 
     
     
         13 . A sewing method as claimed in  claim 11 , wherein the tubular knitting article has one extra thread knots with preferable length between 8 to 10 mm after being cut, and another extra thread knots on the knitting head with preferable length between 20 to 30 mm after being cut. 
     
     
         14 . A stocking manufactured by using a sewing method as claimed in  claim 11 , comprises two thread knots of 8 mm to 10 mm long at both ends.