False-twist device

Claim 2

A false-twist device of the class described comprising, a first rotatable shaft, a plurality of friction units placed at equal distances on said shaft, each unit consisting of a plurality of discs, the planes of the flat sides of which are perpendicular with respect to the longitudinal axis of said shaft, said discs being equally spaced from each other, the diameters of the discs in the central part of each friction unit being greater than the others whereas, on both sides, the disc diameters diminish successively towards the terminal discs, a second rotatable shaft, friction units on said second shaft each consisting of a plurality of discs arranged so as to extend into the spaces between adjacent discs of the friction units on said first shaft, the rims of the respective discs being so-shaped whereby in the cuneate throats between the discs of the friction bodies of the two shafts, the surfaces of the discs form vaulted supports for the textile yarn.

Claim 3

Apparatus according to claim 1, characterized in that the friction units are arranged on the two shafts at such distances that the textile yarn, after having passed over the vaulted surface in one cuneate throat, may be passeD over to the vaulted surface in another cuneate throat.

Claim 4

Apparatus according to claim 1, characterized in that at least two friction units are arranged on each of the two shafts.

Claim 5

Apparatus according to claim 1, characterized in that each of the friction units on the first shaft comprise at least three discs, and each of the friction units on the second shaft comprise at least two discs.

Claim 6

Apparatus according to claim 1, characterized in that the discs consist of metallic oxyde ceramic material.

Claim 7

Apparatus according to claim 1, characterized in that the discs consist of an aluminum basic element coated with oxyde.

Claim 8

A false-twist device of the class described comprising, a first rotatable shaft, a plurality of friction units placed at equal distances on said shaft, each unit consisting of a plurality of discs, the planes of the flat sides of which are perpendicular with respect to the longitudinal axis of said shaft, said discs being equally spaced from each other, the diameters of the discs in the central part of each friction unit being greater than the others whereas, on both sides, the disc diameters diminish successively towards the terminal discs, a second rotatable shaft, friction units on said second shaft each consisting of a plurality of discs arranged so as to extend into the spaces between adjacent discs of the friction units on said first shaft, the rims of the respective discs being so-shaped whereby in the cuneate throats between the discs of the friction bodies of the two shafts, the surfaces of the discs form vaulted supports for the textile yarn, and means carrying thread-guides on a level with the spaces between respective friction units and operable to shift the yarn from the thread-guides to the cuneate throats between discs.

Claim 9

A false-twist device of the class described comprising, a first rotatable shaft, a plurality of friction units placed at equal distances on said shaft, each unit consisting of a plurality of discs, the planes of the flat sides of which are perpendicular with respect to the longitudinal axis of said shaft, said discs being equally spaced from each other, the diameters of the discs in the central part of each friction unit being greater than the others whereas, on both sides, the disc diameters diminish successively towards the terminal discs, a second rotatable shaft, friction units on said second shaft each consisting of a plurality of discs arranged so as to extend into the spaces between adjacent discs of the friction units on said first shaft, the rims of the respective discs being so-shaped whereby in the cuneate throats between the discs of the friction bodies of the two shafts, the surfaces of the discs form vaulted supports for the textile yarn, and means carrying thread-guides on a level with the spaces between respective friction units and operable to shift the yarn from the thread-guides to the cuneate throats between discs.

Claim 10

Device according to claim 7, characterized in that the thread-guides are rods, the free ends of which are bent at obtuse angles.