Device for producing interlaced knots

Patent metadata

Field	Value
Publication number	US-9027214-B2
Application number	US-201313910541-A
Country	US
Kind code	B2
Filing date	Jun 5, 2013
Priority date	Dec 22, 2010
Publication date	May 12, 2015
Grant date	May 12, 2015

Abstract

A device for producing interlaced knots in a multifilament thread is described. The device includes a rotating nozzle ring having a circumferential guide groove and a plurality of nozzle bores opening radially into the base of the guide groove. A stationary pressure chamber, having a chamber opening and an air connection, is associated with the nozzle ring, wherein by rotation of the nozzle ring the nozzle bores can be connected in turn to the chamber opening of the pressure chamber. To permit an intensive air treatment of the thread, the dimension of the chamber opening in the pressure chamber and the spacing of adjacent nozzle bores on the nozzle ring are designed such that as the nozzle ring rotates a plurality of nozzle bores are simultaneously connected to the chamber opening.

First claim

The invention claimed is:

1. A device for producing interlaced knots in a multifilament thread comprising:
a. a nozzle ring, which includes a circumferential guide groove and a plurality of spaced apart nozzle bores opening radially onto a groove base of the guide groove;
b. a stationary pressure chamber associated with the nozzle ring and including an air connection; and,
c. a chamber aperture that extends radially over the stationary pressure chamber an amount defined by an aperture angle (α),
wherein the chamber aperture and the nozzle bores are configured such that, upon rotation of the nozzle ring, at least two nozzle bores are simultaneously fluidly connected with the chamber aperture.

2. The device according to claim 1 further comprising an input thread guide on a first side of the nozzle ring and an output thread guide on a second side of the nozzle ring, wherein the input thread guide and the output thread guide are configured to guide the thread into contact with the groove base of the guide groove of the nozzle ring such that a contact length of the thread in the groove base defines a contact wrap angle (β).

3. The device according to claim 2 , wherein the aperture angle (α) and the contact wrap angle (β) overlap one another.

4. The device according to claim 2 , wherein a space between adjacent nozzle bores defines an angular pitch (φ) and wherein the angular pitch (φ) is smaller than the contact wrap angle (β).

5. The device according to claim 3 , wherein a space between adjacent nozzle bores defines an angular pitch (φ) and wherein the angular pitch (φ) is smaller than the contact wrap angle (β).

6. The device according to claim 3 , wherein the input thread guide and the output thread guide are configured such that the contact wrap angle (β) is greater than the aperture angle (α).

7. The device according to claim 5 , wherein the input thread guide and the output thread guide are configured such that the contact wrap angle (β) is greater than the aperture angle (α).

8. The device according to claim 1 , further comprising a movable cover associated with the nozzle ring in a region where the thread contacts the guide groove such that the guide groove can be covered.

9. The device according to claim 8 , wherein the cover includes a cover surface having a shape complementary to the nozzle ring and extending at both sides of the guide groove.

10. The device according to claim 1 , wherein the nozzle ring has an annular design with an inner sliding surface, onto which the nozzle bores open radially, the pressure chamber is formed on a stator with a cylindrical sealing surface, onto which the chamber aperture opens, and the sliding surface of the nozzle ring acts together with the sealing surface of the stator for conveying air.

11. The device according to claim 1 , wherein the nozzle ring is designed in the shape of a disk with a front surface sliding surface, onto which the nozzle bores open axially, the pressure chamber is formed on a stator with a planar sealing surface, onto which the chamber aperture opens, and the sliding surface of the nozzle ring acts together with the sealing surface of the stator for conveying air.

12. The device according to claim 1 , wherein the guide groove includes a plurality of recesses distributed uniformly on the circumference in the groove base, wherein each one of the recesses is disposed between two adjacent nozzle bores.

13. The device according to claim 1 , wherein the nozzle ring is designed such that it can be powered, and is coupled to an electric motor.

Assignees

• Oerlikon Textile Gmbh & Co Kg

Inventors

• Kaulitzki Marco
• Stündl Mathias
• Matthies Claus

Classifications

• D02G1/161 Primary

  yarn crimping air jets · CPC title

• D02G1/162

  with provision for imparting irregular effects to the yarn · CPC title

• D02J1/08

  Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams · CPC title