Machine and method for sewing, embroidering, quilting and/or the like employing curved sewing needles with corresponding movement of needle bars

Abstract

One embodiment of the present invention relates to a machine for sewing, embroidering, quilting and/or the like. Another embodiment of the present invention relates to a method for sewing, embroidering, quilting and/or the like. In one example, the present invention may be applied (e.g., as a machine and/or method) to a multi-needle machine or method.

What is claimed is: 
     
         1 . A machine for making stitches with thread, comprising:
 at least one needle bar, wherein the needle bar has attached thereto a plurality of needles;   a drive train; and   at least one arm, the arm having a first end and a second end, the first end of the arm being connected to the drive train and the second end of the arm having attached thereto the needle bar;   wherein the arm is moved by the drive train such that the second end of the arm moves along a path forming an arc; and   wherein each of the plurality of needles is elongated along a long axis and wherein each of the plurality of needles is curved along the long axis.   
     
     
         2 . The stitching machine of  claim 1 , wherein the machine performs one of: (a) sewing; (b) embroidering; and (c) quilting. 
     
     
         3 . The stitching machine of  claim 1 , wherein the machine stitches a double chain stitch. 
     
     
         4 . The stitching machine of  claim 1 , wherein the arc is a semi-circular arc. 
     
     
         5 . The stitching machine of  claim 1 , wherein the arm is moved by the drive train such that the second end of the arm reciprocates back and forth along the path forming the arc. 
     
     
         6 . The stitching machine of  claim 1 , wherein at least a plurality of the needles have the same radius of curvature along the long axis of each of the needles. 
     
     
         7 . The stitching machine of  claim 6 , wherein all of the needles have the same radius of curvature along the long axis of each of the needles. 
     
     
         8 . The stitching machine of  claim 1 , wherein the radius of curvature of at least a first one of the plurality of the needles is different along the long axis of the first one of the plurality of needles than the radius of curvature of at least a second one of the plurality of the needles along the long axis of the second one of the plurality of needles. 
     
     
         9 . The stitching machine of  claim 1 , further comprising a programmed computer. 
     
     
         10 . The stitching machine of  claim 1 , wherein the drive train comprises at least one motor. 
     
     
         11 . The stitching machine of  claim 10 , wherein the motor comprises an electric motor. 
     
     
         12 . A machine for making stitches with thread, comprising:
 a first needle bar having attached thereto a plurality of needles;   a second needle bar having attached thereto a plurality of needles;   a drive train;   a first arm, the first arm having a first and a second end, the first end of the first arm being selectively driven by the drive train and the second end of the first arm having attached thereto the first needle bar; and   a second arm, the second arm having a first and a second end, the first end of the second arm being selectively driven by the drive train and the second end of the second arm having attached thereto the second needle bar;   wherein, when the first end of the first arm is driven by the drive train, the first arm is moved by the drive train such that the second end of the first arm moves along a path forming a first arc;   wherein, when the first end of the second arm is driven by the drive train, the second arm is moved by the drive train such that the second end of the second arm moves along a path forming a second arc; and   wherein the driving of the first end of the first arm by the drive train is independent of the driving of the first end of the second arm by the drive train.   
     
     
         13 . The stitching machine of  claim 12 , wherein the machine performs one of: (a) sewing; (b) embroidering; and (c) quilting. 
     
     
         14 . The stitching machine of  claim 12 , wherein the machine stitches a double chain stitch. 
     
     
         15 . The stitching machine of  claim 12 , wherein:
 the drive train comprises a first connector element, a second connector element, a first rod and a second rod;   wherein the first end of the first arm is fixed to the first rod and the first rod is selectively rotated by engagement with the first connector element; and   wherein the first end of the second arm is fixed to the second rod and the second rod is selectively rotated by engagement with the second connector element.   
     
     
         16 . The stitching machine of  claim 15 , wherein:
 the first end of the first arm is fixed to the first rod and the first rod is selectively reciprocally rotated back and forth by engagement with the first connector element; and   the first end of the second arm is fixed to the second rod and the second rod is selectively reciprocally rotated back and forth by engagement with the second connector element.   
     
     
         17 . The stitching machine of  claim 16 , wherein the first connector element comprises a first clamp and the second connector element comprises a second clamp. 
     
     
         18 . The stitching machine of  claim 17 , wherein each of the first clamp and the second clamp comprises at least one of: (a) an electromagnet clamping element; (b) a hydraulic clamping element; and (c) a pneumatic clamping element. 
     
     
         19 . The stitching machine of  claim 1 $, wherein the drive train comprises at least one motor. 
     
     
         20 . The stitching machine of  claim 19 , wherein the motor comprises an electric motor.