Apparatus for false twisting yarn

A yarn false twisting apparatus comprising

• a pair of relatively thin circular discs, with each of said discs having opposite flat faces with one of said faces defining a yarn engaging friction surface, and with said discs each being readily flexible in a direction perpendicular to said faces,
• means mounting said discs for rotation about parallel, spaced apart axes such that portions of the respective yarn engaging friction surfaces are disposed in opposing, substantially non-contacting relationship and define a twisting zone therebetween,
• means for rotating each of said discs such that their respective yarn engaging friction surfaces run in different directions through said twisting zone, and
• means operatively mounted adjacent the face of each of said circular discs opposite the yarn engaging friction surface for biasing said discs toward each other at said twisting zone and during the rotation thereof,
• whereby a yarn may be continuously moved through said twisting zone while having twist imparted thereto by frictional contact between the yarn and the respective opposed friction surfaces resulting from the force exerted by the biasing means, and while the yarn engaging friction surfaces remain in substantially non-contacting relationship with respect to each other.

A yarn false twisting apparatus comprising

• a pair of twist imparting discs, with each disc having a yarn engaging friction surface on one face thereof,
• means mounting said discs for rotation about parallel, spaced apart axes and such that portions of the respective yarn engaging friction surfaces are disposed in opposing, substantially non-contacting relationship and define a twisting zone therebetween,
• means for rotating each of said discs in a common rotational direction and such that their respective yarn engaging friction surfaces run in different directions through said twisting zone, and
• yarn guide means for guiding a moving yarn through said twisting zone in a direction parallel to and laterally spaced from a line extending perpendicularly between said axes of rotation and so as to have twist imparted thereto by frictional contact between the yarn and the respective opposed friction surfaces.