False-twisting apparatus

Claim 2

Apparatus for false twisting yarn comprising a continuously moving member having a high friction surface, a stabilizer member adjacent said high friction surface and positioned so closely adjacent thereto that the yarn does not pass through between them, said two members forming a zone of convergence, and means for guiding said yarn through said zone of convergence at an angle to the path of movement of said high friction surface and in contact with both said high friction surface and said stabilizer surface, said high friction surface having a coefficient of friction that is greater than that of said stabilizer surface, whereby said continuously moving member applies false twist to the yarn.

Claim 3

Apparatus for false twisting yarn and the like, comprising a movable friction member having a high friction surface that moves along a predetermined path, stabilizing means having a low friction surface adjacent said high friction surface, said high friction surface having a coefficient of friction that is higher than that of said stabilizIng means, the respective surfaces being positioned so closely adjacent each other as to form a barrier through which said yarn does not pass, said high friction surface and said stabilizing surface forming a confined region where said surfaces diverge from each other, drive means for moving said high friction surface continuously in a direction such that it moves continuously toward and past and away from said stabilizing surface while said friction member remains adjacent said stabilizing means, guide means arranged for passing yarn under tension against said high friction surface at a location where said high friction surface is moving away from said stabilizing means, and yarn driving means continuously urging said yarn toward both said high friction surface and said low friction surface with the yarn arranged at an angle to the path of movement of said high friction surface to cause twisting by frictional engagement with said high friction surface while said yarn is also in pressure contact with said low friction surface.

Claim 4

Apparatus for false twisting yarn and the like, comprising a movable friction member having a high friction surface that moves along a predetermined path, stabilizing means having a low friction surface adjacent said high friction surface, said high friction surface having a coefficient of friction that is higher than that of said stabilizIng means, the respective surfaces being positioned so closely adjacent each other as to form a barrier through which said yarn does not pass, said high friction surface and said stabilizing surface forming a confined region where said surfaces diverge from each other, drive means for moving said high friction surface continuously in a direction such that it moves continuously toward and past and away from said stabilizing surface while said friction member remains adjacent said stabilizing means, guide means arranged for passing yarn under tension against said high friction surface at a location where said high friction surface is moving away from said stabilizing means, and yarn driving means continuously urging said yarn toward both said high friction surface and said low friction surface with the yarn arranged at an angle to the path of movement of said high friction surface to cause twisting by frictional engagement with said high friction surface while said yarn is also in pressure contact with said low friction surface.

Claim 5

A false twisting apparatus, as recited in claim 2, wherein said high friction surface is a rubbery material.

Claim 6

A false twisting apparatus, as recited in claim 2, wherein lubricating means are provided for applying a lubricant to said high friction surface.

Claim 7

A false twisting apparatus, as recited in claim 2, wherein a wet wick continuously moistens said high friction surface with an aqueous fluid in a manner to minimize wear thereof.

Claim 8

A false twisting apparatus, as recited in claim 2, wherein said low friction surface is chrome plated steel.

Claim 9

A false twisting apparatus, as recited in claim 2, wherein adjustable guide means are provided to regulate the angle at which said yarn engages said high friction surface.

Claim 10

A false twisting apparatus, as recited in claim 2, wherein a heating means is provided which comprises a heated tube with which said yarn is contacted prior to its engagement with said high friction surface.

Claim 11

A false twisting apparatus, as recited in claim 2, wherein said movable member having a friction surface is a generally cylindrical member which is also reciprocably movable longitudinally along its axis, and wherein said apparatus includes a means for reciprocably moving said generally cylindrical member along said axis.

Claim 12

A false twisting apparatus, as recited in claim 9, wherein said stabilizing means is mounted for rotation.

Claim 13

A false twisting apparatus, as recited in claim 10, wherein a cable, suspended under tension between members connected so as to follow the reciprocating movement of said generally cylindrical member, is wrapped about said stabilizing means thereby effecting turning movement of said stabilizing means back and forth.

Claim 16

A process for false twisting yarn comprising traversing said yarn angularly across and in pressure engagement against a high friction moving surface while also in pressure engagement against an adjacent low friction surface, said high friction surface having a coefficient of friction that is greater than that of said low friction surface, said surfaces diverging from each other, driving said high friction surface continuously toward, past and away from said barrier in said confined region, biasing said yarn toward and in frictional engagement with said adjacent surfaces, said yarn being so located where said surfaces diverge that the high friction Surface, when in twisting contact with the yarn, is moving in a direction away from said low friction surface.

Claim 17

A process for false twisting yarn comprising traversing said yarn angularly across and in pressure engagement against a high friction moving surface while also in pressure engagement against an adjacent low friction surface, said high friction surface having a coefficient of friction that is greater than that of said low friction surface, said surfaces diverging from each other, driving said high friction surface continuously toward, past and away from said barrier in said confined region, biasing said yarn toward and in frictional engagement with said adjacent surfaces, said yarn being so located where said surfaces diverge that the high friction Surface, when in twisting contact with the yarn, is moving in a direction away from said low friction surface.

Claim 18

A process as recited in claim 13, wherein said high friction and low friction surfaces are in substantial contact with one another.

Claim 19

A process, as recited in claim 13, wherein said surfaces are associated with counterrotating members.

Claim 20

A false twisting apparatus, as recited in claim 1, wherein said rotatable member having a high friction surface and said stabilizing member having a low friction surface are mounted for rotation in opposed directions.

Claim 21

A false twisting apparatus, as recited in claim 1, wherein means are provided for maintaining said high and said low friction surfaces in frictional engagement with one another, and wherein rotational movement is imparted to one of said surfaces by such engagement.

Claim 22

A false twisting apparatus, as recited in claim 17, wherein said movable member having a high friction surface is a generally cylindrical member which is also reciprocably movable longitudinally along its axis and wherein said apparatus includes a means for continuously and reciprocably moving said cylindrical member along its axis.

Claim 23

A false twisting apparatus, as recited in claim 18, wherein said low friction member is a cylindrical member curved away from the axis of said counter-rotating friction member at the ends thereof.

Claim 24

Apparatus for false twisting yarn of a predetermined diameter, comprising a rotatable member having a friction surface, means providing a stabilizer structure having a stabilizer surface adjacent said friction surface, said member and said means being positioned with their adjacent surfaces in an area of convergence closer together than a yarn diameter, whereby said yarn does not pass through between them, tension means for conveying said yarn into concurrent contact with both said friction surface and said stabilizer surface, and guide means arranged for bending said yarn around in pressure contact with both said friction surface and said stabilizer surface and for continuously urging said yarn against said friction surface and said stabilizer surface, and for continuously urging said yarn toward said area of convergence with the axis of said yarn arranged at an angle to the path of movement of said friction surface to cause twisting by frictional engagement of said friction surface with said yarn.

Claim 25

Apparatus for false twisting yarn of a predetermined diameter, comprising a rotatable member having a friction surface, means providing a stabilizer structure having a stabilizer surface adjacent said friction surface, said member and said means being positioned with their adjacent surfaces in an area of convergence closer together than a yarn diameter, whereby said yarn does not pass through between them, tension means for conveying said yarn into concurrent contact with both said friction surface and said stabilizer surface, and guide means arranged for bending said yarn around in pressure contact with both said friction surface and said stabilizer surface and for continuously urging said yarn against said friction surface and said stabilizer surface, and for continuously urging said yarn toward said area of convergence with the axis of said yarn arranged at an angle to the path of movement of said friction surface to cause twisting by frictional engagement of said friction surface with said yarn.