False twist process and apparatus

Claim 2

A process for imparting false-twist to textile yarns in which the yarn is passed through at least two rotating friction twist tubes each supported on a pair of rotating rollers, the pair of rollers having parallel axes of rotation, said twist tubes being so arranged that the sum total of the input angles and output angles between the directions of travel of the yarn and the rotational axes of the twist tubes amounts to between 300* and 600*.

Claim 3

Process according to claim 1, characterized in that the yarn is passed axially in the same direction through friction twist tubes rotating in the same sense.

Claim 4

Process according to claim 1, characterized in that the yarn is passed axially and in opposite directions through friction twist tubes rotating in the same sense.

Claim 5

Process according to claim 1, characterized in that the yarn is passed through friction twist tubes rotating in opposite senses in axially opposite direction.

Claim 6

Apparatus for producing false-twist in textile yarns comprising at least two friction twist tubes, at least two pairs of rollers rotatable about their axes and supported to form cuneate throats therebetween, means pressing said twist tubes in the throats between said rollers, and means for driving at least one of said rollers of each pair.

Claim 7

Apparatus for producing false-twist in textile yarns comprising at least two friction twist tubes, at least two pairs of rollers rotatable about their axes and supported to form cuneate throats therebetween, means pressing said twist tubes in the throats between said rollers, and means for driving at least one of said rollers of each pair.

Claim 8

Apparatus according to claim 5, characterized in that the pairs of rollers are arranged one behind the other and in that the rollers of each pair of rollers situated opposite one another, are fixed on the same shaft, one of which can be driven.

Claim 9

Apparatus according to claim 5, characterized in that the two pairs of rollers are arranged in axial parallelism.

Claim 10

Apparatus according to claim 5, characterized in that the means for driving said one of said rollers of each pair comprise a shaft upon which each said one of said rollers is mounted, And a further roller on each shaft over which a drive belt may be passed for rotating said further rollers.

Claim 11

Apparatus according to claim 5, characterized in that the friction twist tubes consist of metal oxyde ceramic material.

Claim 12

Apparatus according to claim 5, wherein said tubes so-arranged that the yarn to be texturized is passed sequentially through the tubes with entry and departure angles totalling between 300* and 600*.

Claim 13

Apparatus for producing false-twist in textile yarns comprising two friction twist tubes, two pairs of rollers rotatable about their axes and supported to form cuneate throats therebetween and magnetic means pressing each friction twist tube in the throats between the rollers of one of said pair of rollers, said pair of rollers being arranged one behind the other and the rollers of each pair of rollers situated opposite one another being fixed on the same shaft one of which is provided with a roller over which a drive belt is passed.

Claim 14

Apparatus for producing false-twist in textile yarns comprising two friction twist tubes, two pairs of rollers rotatable about their axes and supported to form cuneate throats therebetween and magnetic means pressing each friction twist tube in the throats between the rollers of one of said pair of rollers, said pair of rollers being arranged one behind the other and the rollers of each pair of rollers situated opposite one another being fixed on the same shaft one of which is provided with a roller over which a drive belt is passed.

Claim 15

Apparatus for producing false-twist in textile yarns comprising three friction twist tubes, two pairs of rollers rotatable about their axes and supported to form cuneate throats therebetween and magnetic means pressing two of the friction tubes in the throats of one of said pair of rollers and the third friction twist tube in one throat of the second pair of rollers both pair of rollers being arranged one behind the other and the rollers of each pair of rollers situated opposite one another being fixed on the same shaft one of which is provided with a roller over which a drive belt is passed.

Claim 16

Apparatus for producing false-twist in textile yarns comprising three friction twist tubes, two pairs of rollers rotatable about their axes and supported to form cuneate throats therebetween and magnetic means pressing two of the friction tubes in the throats of one of said pair of rollers and the third friction twist tube in one throat of the second pair of rollers both pair of rollers being arranged one behind the other and the rollers of each pair of rollers situated opposite one another being fixed on the same shaft one of which is provided with a roller over which a drive belt is passed.

Claim 17

Apparatus for producing false-twist in textile yarns comprising two friction twist tubes two pair of rollers rotatable about their axes and supported to form cuneate throats therebetween and magnetic means pressing each friction twist tube in the throat between the rollers of one of said pair of rollers said pair of rollers being arranged in axial parallelism and each of the shafts of one of the rollers of each pair of said rollers being provided with a further roller over which a drive belt is passed driving said further rollers with equal speeds in opposite directions.

Claim 18

Apparatus for producing false-twist in textile yarns comprising two friction twist tubes two pair of rollers rotatable about their axes and supported to form cuneate throats therebetween and magnetic means pressing each friction twist tube in the throat between the rollers of one of said pair of rollers said pair of rollers being arranged in axial parallelism and each of the shafts of one of the rollers of each pair of said rollers being provided with a further roller over which a drive belt is passed driving said further rollers with equal speeds in opposite directions.