Method and apparatus for false twisting yarn

Claim 3

The method of false twisting a continuously traveling yarn as recited in claim 1, wherein the yarn is displaced equally to opposite sides of the rectilinear path of travel.

Claim 4

The method of false twisting a continuously traveling yarn as recited in claim 1, wherein the yarn is guided and rotated at spaced intervals by frictionally engaging, driven cooperating rotary members forming at least one seat for the yarn.

Claim 5

The method of false twisting a continuously traveling yarn as recited in claim 3, wherein the yarn extends across the peripherAl surface of a rotating member at an angle with respect to the axis of rotation and the direction of rotation of the rotating member.

Claim 6

The method of false twisitng a continuously traveling yarn as recited in claim 1, wherein the guided, displaced yarn follows a tortuous course.

Claim 7

Apparatus for imparting a false twist to a continuously traveling yarn comprising; support means, a pair of parallel shafts mounted for rotation upon said support means, a plurality of axially spaced members mounted upon each shaft for rotation, each member having a cylindrical, peripheral yarn engaging surface guidably supporting a yarn rectilinearly, each member on one shaft cooperating in partial overlapping relation with a member on the other shaft to define yarn-receiving seats on opposite sides of a plane passing through the axes of said shafts, means for guiding the yarn prior to and upon emerging from said plurality of axially spaced members, said yarn guiding means having yarn guide surfaces aligned within the plane passing through the axes of said shafts, said guide means directing the yarn across the yarn engaging surfaces of selected members at an angle with respect to the direction of rotation and the axis of rotation of said selected members, each pair of cooperating members defining yarn seats being spaced apart sufficiently to permit the running yarn to alternate between yarn seats at opposite sides of the plane passing through the axes of said shafts, and means for rotating said members to impart twist to the yarn.

Claim 8

Apparatus for imparting a false twist to a continuously traveling yarn comprising; support means, a pair of parallel shafts mounted for rotation upon said support means, a plurality of axially spaced members mounted upon each shaft for rotation, each member having a cylindrical, peripheral yarn engaging surface guidably supporting a yarn rectilinearly, each member on one shaft cooperating in partial overlapping relation with a member on the other shaft to define yarn-receiving seats on opposite sides of a plane passing through the axes of said shafts, means for guiding the yarn prior to and upon emerging from said plurality of axially spaced members, said yarn guiding means having yarn guide surfaces aligned within the plane passing through the axes of said shafts, said guide means directing the yarn across the yarn engaging surfaces of selected members at an angle with respect to the direction of rotation and the axis of rotation of said selected members, each pair of cooperating members defining yarn seats being spaced apart sufficiently to permit the running yarn to alternate between yarn seats at opposite sides of the plane passing through the axes of said shafts, and means for rotating said members to impart twist to the yarn.

Claim 9

Apparatus for imparting a frictional false twist to a continuously traveling yarn as recited in claim 6, wherein the yarn-engaging peripheral surface of at least one member on each shaft is rectilinear and includes a yarn-engaging surface having a high coefficient of friction.

Claim 10

Apparatus for imparting a false twist to a continuously traveling yarn as recited in claim 6, wherein a rotatable yarn engaging surface of a member on one shaft is substantially wider than the yarn engaging surface of a cooperating member mounted upon the other shaft.

Claim 11

Apparatus for imparting a frictional false twist to a continuously traveling yarn as recited in claim 6, wherein the outer surface of a yarn-engaging member on one shaft is grooved to receive the yarn-engaging surface of a member on the other shaft.

Claim 12

Apparatus for imparting a false twist to a continuously traveling yarn as recited in claim 6, wherein the yarn-engaging peripheral surfaces of all members are rectilinear, and the yarn-engaging surfaces of each cooperating pair of members are of different widths.

Claim 13

Apparatus for imparting a false twist to a continuously traveling yarn as recited in claim 6, wherein said plurality of axially-spaced members rotate in the same direction and at the same speed.

Claim 14

Apparatus for imparting a false twist to a continuously traveling yarn comprising; support means, a shaft rotatably mounted on said support means, a yarn-engaging twist member mounted on said shaft for rotation therewith, said yarn-engaging twist member having a cylindrical, peripheral yarn-engaging surface, means for guidably supporting the continuously traveling yarn across the peripheral yarn-engaging surface of said twist member, and means for rotating said shaft.

Claim 15

Apparatus for imparting a false twist to a continuously traveling yarn comprising; support means, a shaft rotatably mounted on said support means, a yarn-engaging twist member mounted on said shaft for rotation therewith, said yarn-engaging twist member having a cylindrical, peripheral yarn-engaging surface, means for guidably supporting the continuously traveling yarn across the peripheral yarn-engaging surface of said twist member, and means for rotating said shaft.

Claim 16

Apparatus for imparting a false twist to a continuously traveling yarn as recited in claim 12, a second yarn-engaging twist member mounted on said shaft in spaced-axial relation to said other yarn-engaging twist member and having a cylindrical, peripheral yarn-engaging surface forming a yarn-receiving throat therebetwen, said yarn-engaging twist members straddling said means for guidably supporting the continuously traveling yarn whereby the yarn engages the cylindrical, peripheral yarn-engaging surfaces of both of said twist members when said yarn emerges from the yarn-receiving throat between said twist members.