Claims
- 1. A yarn false twist texturing apparatus comprisinga yarn heater, a yarn cooling device, and a yarn twisting unit serially arranged along a yarn path of travel, said yarn cooling device comprising a cooling tube which defines an upstream end adjacent the yarn heater and an opposite takeoff end, with the cooling tube being configured and positioned for having the advancing yarn spirally advance thereover from the upstream end to the takeoff end, and with said takeoff end of said cooling tube being closed, and wherein said yarn cooling device further comprises an inner tube positioned within the cooling tube so as to define a passage which extends between the inner tube and the cooling tube, with the inner tube having a discharge end with at least one opening therein which is located adjacent the closed takeoff end of the cooling tube and an opposite inlet end adjacent the upstream end of the cooling tube, and a source of cooling fluid connected with the inlet end of the inner tube so that the cooling fluid flows into the inlet end of the inner tube, through the inner tube, into the passage through the at least one opening in the discharge end of the inner tube, and then back through the passage toward the upstream end of the cooling tube so as to cool the cooling tube and cool the yarn as it advances along the cooling tube.
- 2. The yarn false twist texturing apparatus as defined in claim 1 wherein the upstream end of the cooling tube has an outlet which communicates with the passage and through which the cooling fluid exhausts.
- 3. The yarn false twist texturing apparatus as defined in claim 2 wherein the inner tube has an interior free flow cross section which is greater than the free flow cross of the passage.
- 4. The yarn false twist texturing apparatus as defined in claim 2 wherein the inner tube has an interior free flow cross section which is at least twice as large as the free flow cross section of the passage.
- 5. The yarn false twist texturing apparatus as defined in claim 2 wherein the source of cooling fluid comprises a source of air and a blower.
- 6. The yarn false twist texturing apparatus as defined in claim 5 wherein the source of cooling fluid further comprising an air conditioning unit.
- 7. The yarn false twist texturing apparatus as defined in claim 2 further comprises an inlet yarn guide positioned in the yarn path of travel adjacent the upstream end of the cooling tube and an outlet yarn guide positioned in the yarn path of travel adjacent the takeoff end of the cooling tube.
- 8. The yarn false twist texturing apparatus as defined in claim 7 wherein at least one of said inlet yarn guide and said outlet yarn guide is adjustably mounted for movement in the circumferential direction of the cooling tube.
- 9. The yarn false twist texturing apparatus as defined in claim 2 wherein the yarn heater and the yarn cooling device are arranged in a common, generally horizontal plane.
- 10. The yarn false twist texturing apparatus as defined in claim 1 wherein the inner tube is coaxially disposed within the cooling tube.
- 11. A yarn false twist texturing apparatus comprising a plurality of side by side processing stations, with each processing station comprisinga feed yarn package holder, a first yarn feed system, a yarn heater, a yarn cooling device, a yarn twisting unit, a second yarn feed device, and a yarn takeup device serially arranged along a yarn path of travel, each of said yarn cooling devices comprising a cooling tube which defines an upstream end adjacent the yarn heater and an opposite takeoff end, with the cooling tube being configured and positioned for having the advancing yarn spirally advance thereover from the upstream end to the takeoff end, and with said takeoff end of said cooling tube being closed, and wherein said yarn cooling device further comprises an inner tube positioned within the cooling tube so as to define a passage which extends between the inner tube and the cooling tube, with the inner tube having a discharge end with at least one opening therein which is located adjacent the closed takeoff end of the cooling tube and an opposite inlet end adjacent the upstream end of the cooling tube, and a source of cooling fluid connected with the inlet end of the inner tube of each yarn cooling device so that the cooling fluid flows into the inlet end of the inner tube, through the inner tube, into the passage through the at least one opening in the discharge end of the inner tube, and then back through the passage toward the upstream end of the cooling tube so as to cool the cooling tube and cool the yarn as it advances along the cooling tube.
- 12. The yarn false twist texturing apparatus as defined in claim 11 wherein the source of cooling fluid is connected via a common manifold to the inlet end of each of the inner tubes.
- 13. The yarn false twist texturing apparatus as defined in claim 12 wherein the upstream end of each cooling tube has an outlet which communicates with the passage and through which the cooling fluid exhausts.
- 14. The yarn false twist texturing apparatus as defined in claim 13 wherein the inner tube of each cooling tube has an interior free flow cross section which is greater than the free flow cross section of the passage.
- 15. The yarn false twist texturing apparatus as defined in claim 13 wherein the inner tube of each cooling device has an interior free flow cross section which is at least twice as large as the free flow cross section of the passage.
- 16. The yarn false twist texturing apparatus as defined in claim 11 wherein the inner tube is coaxially disposed within the cooling tube.
Priority Claims (1)
Number |
Date |
Country |
Kind |
199 24 282 |
May 1999 |
DE |
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CROSS REFERENCE TO RELATED APPLICATION
This is a continuation of international application No. PCT/EP00/04638, filed May 22, 2000, and designating the U.S.
US Referenced Citations (7)
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Continuations (1)
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Number |
Date |
Country |
Parent |
PCT/EP00/04638 |
May 2000 |
US |
Child |
09/771768 |
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US |