Method and apparatus for producing randomly variegated multiple strand yarn in twisting together at least two yarns and yarn and fabric made by said method

A method for producing randomly variegated multiple strand yarn in twisting together two or more yarns at a yarn twisting station, comprising:

• continuously feeding at least two yarns through a twisting head,
• twisting the at least two yarns in the twisting head;
• taking up the yarns from the twisting head over a traversing drum to form a yarn package;
• rotating said traversing drum by driving it with an electric motor powered by alternating electric current;
• and
• varying the electrical input to said electric motor according to a predetermined cycle including a variation of said electrical input sufficient to result in randomly unpredictable inertial resistance of the traversing drum to rotational speed variation, thereby creating randomly unpredictable take up of said yarns to produce non-uniform random twist in said yarns.

A method for producing randomly variegated multiple strand yarn in pneumatically twisting together at least two yarns at a plurality of yarn twisting stations, comprising:

• continuously feeding at least two yarns into a chamber in a plurality of pneumatic twisting heads, each yarn twisting station being one of said pneumatic twisting heads;
• delivering compressed air to a manifold through spaced inlets so as to create random air turbulence within said manifold;
• supplying said randomly turbulent air from said manifold through a plurality of outlets to said chambers for randomly twisting together the yarns therein, each said outlet communicating with one of said chambers, said outlets being disposed intermediate said spaced outlets;
• taking up the yarns from said twisting heads over a plurality of traversing drums, each drum being at one of said yarn twisting stations and taking up yarn from one of said pneumatic twisting heads;
• commonly driving said traversing drums by a shaft on which said traversing drums are commonly mounted, said shaft being driven by an electric motor powered by alternating electric current;
• varying the electrical input to said electric motor according to a predetermined cycle including a variation of said electrical input sufficient to result in randomly unpredictable inertial resistance of the traversing drum to rotational speed variation, thereby creating randomly unpredictable take-up of said yarns to produce non-uniform random twist in said yarns.

An apparatus for producing randomly variegated multiple strand yarn in pneumatically twisting together at least two yarns at a yarn twisting station, comprising:

• a pneumatic twisting head having a chamber therein;
• means for continuously feeding at least two yarns into said chamber in said pneumatic twisting head;
• a supply conduit having spaced inlets into which compressed air is delivered so as to create random air turbulence in said supply conduit, said supply conduit further having an outlet communicating with said chamber to supply said randomly turbulent air thereinto for randomly twisting together the yarns therein;
• and
• means for taking up said randomly twisted yarns to form a yarn package.

An apparatus for producing randomly variegated multiple strand yarn in twisting together two or more yarns at a yarn twisting station, comprising:

• means for continuously feeding at least two yarns through a twisting head;
• means for taking up said yarns from said twisting head over a traversing drum to form a yarn package;
• an electric motor powered by alternating electric current for rotatingly driving said traversing drum;
• electrical input means for supplying said motor with alternating electric current;
• and
• control means for varying said electrical input current according to a predetermined cycle including a variation of said electrical input sufficient to result in randomly unpredictable inertial resistance of the traversing drum to rotational speed variation, thereby creating randomly unpredictable take up of said yarns to produce non-uniform random twist in said yarns.

An apparatus for producing radomly variegated multiple strand yarn in pneumatically twisting together at least two yarns at a plurality of yarn twisting stations, comprising:

• a pneumatic twisting head having a chamber therein, each yarn twisting station having one of said pneumatic twisting heads;
• means for continuously feeding at least two yarns into each said chamber in each said pneumatic twisting head;
• a manifold having spaced inlets into which compressed air is delivered so as to create random air turbulence in said manifold, said manifold further having a plurality of outlets intermediate said spaced inlets, each outlet communicating with one of said chambers to supply said randomly turbulent air thereinto for randomly twisting together the yarns therein;
• a plurality of traversing drums mounted on a common shaft, each said drum being located at one of said yarn twisting stations;
• means for taking up said randomly twisted yarns from each said pneumatic twisting head over one of said traversing drums to form a yarn package;
• an electric motor for rotatingly driving said common shaft for rotating said traversing drums;
• electrical input means for supplying said motor with alternating electric current;
• and
• control means including a cam-actuated switch for varying said electrical input according to a predetermined cycle including a variation of said electrical input sufficient to result in randomly unpredictable inertial resistance of the traversing drum to rotational speed variation, thereby creating randomly unpredictable take up of said yarns to produce non-uniform random twist in said yarns.