Claims
- 1. A method of twisting a textile strand to provide longitudinally spaced zones which are twisted in opposite directions, comprising the steps of
- moving the strand in a longitudinal direction,
- moving a first strand twisting device concurrently with the strand and operatively engaging a first location on the strand with said first strand twisting device,
- rotating the strand with said first strand twisting device to provide the strand with opposite twists on opposite sides of the first location, bringing the twisted strand into parallel adjacent relationship with a second strand, and
- releasing the twisted strand to permit it to untwist at least partially and to twist itself to said second strand.
- 2. The method of claim 1 including the steps of moving a second strand twisting device concurrently with the strand,
- operatively engaging a second location on the strand with said second strand twisting device, said second location being spaced from the first location, and
- rotating the strand at said second location with said second strand twisting device.
- 3. The method of claim 2 including the steps of holding the strand against rotation at a third location between the first and second locations, said rotating steps twisting the strand in a same direction at both said first and second locations whereby the strand will have opposite twists on opposite sides of said third location.
- 4. The method of claim 3 wherein the strand is held against rotation by joining it at said third location to said second strand.
- 5. The method of claim 3 wherein the strand is held against rotation at the third location by engaging it with a strand-clamping means.
- 6. The method of claim 5 wherein the second strand is subjected to the same steps as the first strand, said third location of said second strand being located adjacent to one of the first or second locations of said first strand.
- 7. The method of claim 1 including the step of moving a second strand twisting device concurrently with the strand, operatively engaging a second location on the strand with said second strand twisting device, said second location being spaced from the first location,
- moving a third strand twisting device concurrently with the strand, operatively engaging a third location on the strand with said third strand twisting device, said second location being located between said first and third locations on the strand,
- rotating the strand with said first and third strand twisting devices at said first and third locations in one direction and rotating the strand with said second strand twisting device at said second location in an opposite direction whereby the strand is twisted in one direction between the first and second locations and is twisted in an opposite direction between the second and third locations.
- 8. The method of claim 7 wherein the distance between said first and second locations is different from the distance between said second and third locations whereby the length of said strand twisted in one direction is different from the length of said strand twisted in the opposite direction.
- 9. The method of claim 7 including the steps of moving fourth and fifth strand twisting devices concurrently with the strand and operatively engaging fourth and fifth locations on the strand respectively with said fourth and fifth strand twisting device, said fourth location being located between said third and fifth locations, said method being performed by rotating the strand at the first and fifth locations in one direction while rotating the strand at the second and fourth locations in an opposite direction,
- holding the strands against rotation at the first, second, fourth and fifth locations and, while the strand is so held, rotating the strand with the third strand twisting device at the third location in said opposite direction whereby the strand is twisted in one direction between the first and second third locations and twisted in an opposite direction between the third and fifth locations.
- 10. The method of claim 1 wherein the twisting of the twisted strand to the second strand forms a plied yarn, including the further method of cabling and plied yarn to another plied yarn, said method including the steps of moving a first yarn twisting device concurrently with the plied yarn and operatively engaging a first point on the yarn with said first yarn twisting device, rotating the yarn at said first point to provide the yarn with opposite twists on opposite sides of said point, bringing the twisted yarn into parallel adjacent relationship with a second yarn, and
- releasing the twisted yarn to permit it to untwist at least partially and to twist itself to said second yarn to form a cabled yarn.
- 11. The method of claim 10 wherein the strand twisting devices and the yarn twisting devices are moved in circular paths, said method including the steps of removing the strands from the circular path of the strand twisting devices and feeding the yarn to the path of said yarn twisting devices.
- 12. The method of claim 11 wherein the centers of said circular paths are spaced from each other.
- 13. The method of claim 11 wherein said circular paths are concentric.
- 14. The method of claim 1 wherein the strand twisting device is moved in a circular path.
- 15. The method of claim 1 wherein the strand and said first strand twisting device move laterally relative to each other until said strand is operatively engaged by said first strand twisting device.
- 16. The method of claim 15 including the step of moving two strands laterally into a longitudinal bore of a strand-joining device, and joining the strands to each other by producing fluid turbulence in said bore to entangle the fibers of said strands.
- 17. The method of claim 16 including the step of holding said strand against rotation in said bore.
- 18. The method of claim 15 wherein said rotating step is performed by admitting fluid into a tangential inlet of a longitudinal strand-receiving bore, said relative lateral movement moving the strand through a slot which enters the said bore.
- 19. The method of claim 1 including the step of joining spaced locations on the strand to spaced locations on a second strand before releasing the twisted strand to permit it to twist itself to said second strand.
- 20. The method of claim 19 wherein the length of said first strand between a pair of said spaced locations is different from the length of said second strand between said pair of spaced locations.
- 21. The product produced by the method of claim 20.
- 22. The method of claim 1 wherein the rotating step twists a length of strand forwardly of the strand twisting device which has a length different from the length of strand twisted rearwardly of said strand twisting device.
- 23. The product produced by the method of claim 22.
- 24. The method of claim 1 including the step of moving the strand through a stationary fluid jet twister before engaging the strand with the first strand twisting device.
- 25. The method of claim 1 including the step of introducing into the strand a continuous thinner strand of greater tensile strength.
- 26. The method of claim 1 including the step of moving a strand holding device concurrently with the strand, engaging the strand with the strand holding device to hold the strand against rotation at the strand holding device, moving a strand joining device concurrently with the strand, engaging the strand with the strand joining device and joining the strand to the second strand at the strand joining device.
- 27. The method of claim 1 including the step of moving a strand holding device concurrently with the strand, and engaging the strand with the strand holding device to hold the strand against rotation at the strand holding device.
- 28. The method of claim 1 including the step of moving a strand joining device concurrently with the strand, engaging the strand with the strand joining device and joining the strand to the second strand at the strand joining device.
- 29. The method of claim 1 wherein the strand is a continuous bundle of filaments.
- 30. The method of claim 1 wherein the strand is an assembly in continuous form of discontinuous filaments.
- 31. The method of claim 1 wherein the strand is a drafted carded sliver made from fibers pretreated to increase its tensile strength.
- 32. The method of claim 1 wherein the strand is a drafted carded sliver.
- 33. The method of claim 1 wherein the strand is produced by a tow treatment process.
- 34. The method of claim 1 wherein the strand is a combination of staple fibers and one or more continuous filaments.
- 35. The method of claim 1 wherein the strand subjected to the method is a component of a plied yarn.
- 36. Apparatus for twisting a textile strand to provide longitudinally spaced zones which are twisted in opposite directions, comprising
- means for moving the strand in a longitudinal direction,
- means for moving a first strand twisting device concurrently with the strand and into operative engagement with a first location on the strand,
- said first strand twisting device including means for rotating the strand at the first location to provide the strand with opposite twists on opposite sides of the first location,
- means for bringing the twisted strand into parallel adjacent relationship with a second strand and releasing the twisted strand to permit it to untwist at least partially to twist itself to said second strand.
- 37. The apparatus of claim 36 including a second strand twisting device spaced from the first strand twisting device,
- means for moving said second strand twisting device concurrently with the strand into operative engagement with a second location on the strand,
- said second strand twisting device including means for rotating the strand at the second location to provide the strand with opposite twists on opposite sides of said second location.
- 38. The apparatus of claim 37 including means for holding the strand against rotation at a third location between the first and second twisting devices, said twisting devices rotating the strand in a same direction at both said first and second locations whereby the strand will have opposite twists on opposite sides of said third location.
- 39. The apparatus of claim 38 wherein the means for holding the strand against rotation includes means for joining it at said third location to said second strand.
- 40. The apparatus of claim 38 wherein the means for holding the strand against rotation is a strand-clamping means.
- 41. The apparatus of claim 40 having third and fourth strand twisting devices for rotating the second strand at spaced locations thereon to provide the second strand with opposite twists on opposite sides of the locations where twist is introduced, a second strand clamping means for holding said second strand against rotation at a location between the third and fourth strand twisting devices, said third and fourth strand twisting devices rotating the second strand in a same direction at their respective locations, said second strand-clamping means being located adjacent to one of the first or second strand twisting devices.
- 42. The apparatus of claim 36 including a second strand twisting device spaced from the first strand twisting device, means for moving the second strand twisting device concurrently with the strand into operative engagement with a second location on the strand, said second strand twisting device including means for rotating the strand at the second location to provide the strand with opposite twists on opposite sides of said second location,
- a third strand twisting device spaced from the first and second strand twisting devices, means for moving the third strand twisting device concurrently with the strand into operative engagement with a third location on the strand, said third strand twisting device including means for rotating the strand at the third location to provide the strand with opposite twists on opposite sides of the third location,
- said second strand twisting device being located between the first and third strand twisting devices, said twisting means of said first and third strand twisting devices being arranged to rotate the first and third locations in one direction which is opposite to the direction of rotation applied to the second location by the second strand twisting device, whereby the strand is twisted in one direction between the first and second locations and is twisted in an opposite direction between the second and third locations.
- 43. The apparatus of claim 42 wherein the distance between said first and second strand twisting device is different from the distance between said second and third strand twisting devices whereby the length of said strand twisted in one direction is different from the length of said strand twisted in the opposite directions.
- 44. The apparatus of claim 42 including spaced apart fourth and fifth strand twisting devices, means for moving said fourth and fifth strand twisting devices concurrently with the strand into operative engagement with the fourth and fifth locations of the strand, said fourth strand twisting device being located between said third and fifth strand twisting devices, said twisting means being arranged initially to rotate the strand at the first and fifth locations in one direction while rotating the strand at the second and fourth locations in an opposite direction,
- means operable subsequently to hold the strands against rotation at the first, second, fourth and fifth locations while said twisting means of the third strand twisting device rotates the strand in said opposite direction whereby the strand becomes twisted in one direction between the first and third locations and twisted in an opposite direction between the third and fifth locations.
- 45. The apparatus of claim 36 wherein the twisting of the twisted strand to the second strand forms a plied yarn, including apparatus for cabling the plied yarn to another plied yarn, said apparatus including a first yarn twisting device, means for moving said first yarn twisting device concurrently with the plied yarn and into operative engagement with a first point on the yarn, said yarn twisting device including means for rotating the yarn at said first point to provide the yarn with opposite twists on opposite sides of said first point, means for bringing the twisted yarn into parallel adjacent relationship with a second yarn and releasing the twisted yarn to permit it to untwist at least partially and to twist itself to said second yarn.
- 46. The apparatus of claim 45 wherein the moving means moves the strand twisting devices and the yarn twisting devices in circular paths, means for removing the strands from the circular path of the strand twisting devices and feeding the yarn to the path of said yarn twisting devices.
- 47. The apparatus of claim 46 wherein the centers of said circular paths are spaced from each other.
- 48. The apparatus of claim 46 wherein said circular paths are concentric.
- 49. The apparatus of claim 36 wherein the moving means moves the strand twisting device in a circular path.
- 50. The apparatus of claim 36 wherein the moving means move the strand and said first strand twisting device laterally relative to each other until said strand is operatively engaged by said first strand twisting device.
- 51. The apparatus of claim 50 including a strand-joining device, means for moving two strands laterally into a longitudinal bore of the strand-joining device, and means in the strand-joining device for producing fluid turbulence in said bore to join the strands by entangling their fibers.
- 52. The apparatus of claim 51 including means for holding said strand against rotation in said bore.
- 53. The apparatus of claim 50 wherein said twisting means includes a longitudinal strand-receiving bore, a slot leading into said bore for admitting a strand into the bore, and means for admitting fluid into a tangential inlet of said bore.
- 54. The apparatus of claim 36 including means for joining spaced locations on the strand to spaced locations on the second strand before the strand twists itself to the second strand.
- 55. The apparatus of claim 54 including means for providing a length of said first strand between a pair of said spaced locations, and means for providing a greater length of said second strand between said pair of spaced locations.
- 56. The apparatus of claim 36 including means for providing a unidirectionally twisted length of strand forwardly of the strand twisting device which has a length different from the unidirectionally twisted length of strand disposed rearwardly of said strand twisting device.
- 57. The apparatus of claim 36 including stationary fluid jet twister means for twisting the strand before the strand is engaged with the first strand twisting device.
- 58. The apparatus of claim 36 including a strand holding device, means for moving the strand holding device concurrently with the strand and into engagement with the strand, said strand holding device including means for holding the strand against rotation, a strand joining device, means for moving the strand joining device concurrently with the strand and into engagement with the strand, said strand joining device including means for joining the strand to the second strand at the strand joining device.
- 59. The apparatus of claim 36 including a strand holding device, means for moving the strand holding device concurrently with the strand and into engagement with the strand, said strand holding device including means for holding the strand against rotation at the strand holding device.
- 60. The apparatus of claim 36 including a strand joining device, means for moving the strand joining device concurrently with the strand and into engagement with the strand, said strand joining device including means for joining the strand to the second strand at the strand joining device.
REFERENCE TO RELATED U.S. APPLICATIONS
This is a continuation-in-part of U.S. application Ser. No. 913,674 filed June 8, 1978, now abandoned, and a continuation of U.S. application Ser. No. 916,567 filed June 19, 1978, now abandoned, the disclosures of which are incorporated herein by reference.
US Referenced Citations (8)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
913674 |
Jun 1978 |
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