Process and apparatus for making textured yarn

Claim 3

The method of claim 1 wherein the axis of the confined path of the air intersects the axis of the chamber at an angle of substantially 53*.

Claim 4

The method of claim 1 wherein two ends of yarn are separately but simultaneously textured and then interlaced together in said chamber.

Claim 5

The method of claim 2 wherein the ends are selected from the group consiting of nylon, polyester and combinations thereof.

Claim 6

Apparatus for preparing a yarn comprising a plurality of continuous synthetic thermoplastic filaments of a denier suitable for making fabrics, such as wovens or knits, said yarn being characterized by uniform repeating sections of about 1/8 -1 inch in length, each said uniform repeating section being composed of a relatively open bulky and lofty portion of false twisted multifilaments and a relatively short node portion where the multifilaments are closer together and are interlaced and encircled, comprising means for supporting a supply of at least one end of multifilament yarn to be textured, texturing means including heating means and false twisting means, means for continuously passing said yarn through said texturing means whereby said yarn is false twisted and heat set in the twisted condition, an air jet device having a cylindrical chamber of about one-eighth inch diameter formed therein, a coaxial yarn feed passage of a diameter smaller than said chamber leading into said chamber and an air inlet of a cross-section smaller than that of said chamber having an axis which converges with respect to the axis of the chamber in the direction of yarn movement and intersects therewith at an angle of between 45*-75* measured between said inlet and said passage, means for continuously withdrawing the yarn from said texturing means and continuously feeding the same through said yarn inlet and said chamber with an overfeed of from 2-10 percent and means for communicating a source of air under a pressure of between 15-30 psig with said air inlet.

Claim 7

Apparatus for preparing a yarn comprising a plurality of continuous synthetic thermoplastic filaments of a denier suitable for making fabrics, such as wovens or knits, said yarn being characterized by uniform repeating sections of about 1/8 -1 inch in length, each said uniform repeating section being composed of a relatively open bulky and lofty portion of false twisted multifilaments and a relatively short node portion where the multifilaments are closer together and are interlaced and encircled, comprising means for supporting a supply of at least one end of multifilament yarn to be textured, texturing means including heating means and false twisting means, means for continuously passing said yarn through said texturing means whereby said yarn is false twisted and heat set in the twisted condition, an air jet device having a cylindrical chamber of about one-eighth inch diameter formed therein, a coaxial yarn feed passage of a diameter smaller than said chamber leading into said chamber and an air inlet of a cross-section smaller than that of said chamber having an axis which converges with respect to the axis of the chamber in the direction of yarn movement and intersects therewith at an angle of between 45*-75* measured between said inlet and said passage, means for continuously withdrawing the yarn from said texturing means and continuously feeding the same through said yarn inlet and said chamber with an overfeed of from 2-10 percent and means for communicating a source of air under a pressure of between 15-30 psig with said air inlet.

Claim 8

The apparatus of claim 5 wherein said air jet device comprises a body having said cylindrical chamber formed in an intermediate section thereof, said yarn feed passage formed in a yarn inlet end section therEof, and a coaxial larger cylindrical chamber formed in a yarn discharge end section thereof, the chamber in said intermediate section having a diameter from 1.5-3 times larger than that of the passage in said yarn inlet end section and the chamber in said discharge end section having a diameter of about 1.5 -2 times larger than the diameter of the chamber in said intermediate section.

Claim 9

The apparatus of claim 5 wherein the axis of said air inlet intersects the axis of said cylindrical chamber at an angle of substantially 53*.