A method of forming a craft yarn having unique properties and a wide variation of physical characteristics, and consisting of a selected plurality of parallel-laid yarns encased along their length by a zig-zag stitch of selected thread.
A process for edging a fabric which includes the steps of rolling the edge of the fabric loosely and then sewing the rolled edge with a tight zig-zag stitch which overlaps the outer fold of the rolled edge. In one arrangement, the zig-zag stitch is wider than the rolled portion and completely crosses over the rolled edge. A stiffener is added in one arrangement.
A sewing machine is provided which is capable of sewing reinforcing wire to tubular grafts in order to form stent grafts. A bobbin (which may be seated in a shuttle) carries a bottom thread through the bore of the tubular graft and forms a stitch in combination with a top thread carried on a needle which pierces the graft wall.
