Patent US4630043A successfully refreshed from Google Patents.
US3774384A
Expired / Lapsed
US
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Yarn processing post treatment
Assignee: Leesona Corp
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Filing: 1972-02-28
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Granted: 1973-11-27
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Expires: 1992-02-28
Abstract
Abstract Continuous process and apparatus for bulking textured yarn includes combining a plurality of strands of the textured yarn into a continuous tow, forming the tow into a continuous series of loops, moving the looped tow through a bulking zone, setting the bulked tow, separating the tow into individual bulked strands, and collecting the strands into packages. The bulking chamber includes a plurality of positively driven screw-like members, which advance the tow through the chamber under bulking conditions at a predetermined rate. In one embodiment the tow is delivered into the chamber through a course which includes forming the tow into relatively large loops which are permitted to shrink and thus bulk promptly upon introduction into the bulking zone. The bulking zone includes controlled conditions of temperature and humidity. In another embodiment the tow is first subjected to a preconditioning step within the bulking zone and thereafter is bulked while being relaxed under controlled conditions in the bulking zone. Subsequently, the bulk is set in a separate zone by dry heat.
Inventors
- 👤 H Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:53
CPC Classifications
D; D02; D02J; D02J13/00; D02J13/001; B; B65; B65H; B65H51/00; B65H51/20; B65H51/22; B65H54/00; B65H54/02; B65H54/10; B65H54/20; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/06; D02G1/20; D02G1/205; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
98 words
A continuous process for post treating textured yarn comprising the steps of, providing a zone for bulking the yarn, combining a plurality of strands of the textured yarn into a continuous tow, forming the tow into a continuous series of loops on support means, advancing the loops of tow by strand engaging means generally in the direction of the longitudinal axis of said loops while simultaneously moving said tow around the axis of said loops relative to said support means at a substantially uniform rate through the bulking zone, and thereafter separating the tow into individual bulked strands.
Claim 2
Dependent Claim
98 words
A continuous process for post treating textured yarn comprising the steps of, providing a zone for bulking the yarn, combining a plurality of strands of the textured yarn into a continuous tow, forming the tow into a continuous series of loops on support means, advancing the loops of tow by strand engaging means generally in the direction of the longitudinal axis of said loops while simultaneously moving said tow around the axis of said loops relative to said support means at a substantially uniform rate through the bulking zone, and thereafter separating the tow into individual bulked strands.
Claim 3
Dependent Claim
39 words
The process as set forth in claim 1 wherein the step of moving the tow includes transposing adjacent strands within the tow relatively to each other to provide substantially equal exposure of the plurality of strands to said zone.
Claim 4
Dependent Claim
47 words
The process as set forth in claim 1 wherein the step of moving the tow includes false twisting the tow generally about its longitudinal axis to transpose the strands within said tow relatively to each other to provide substantially equal exposure of the strands to said zone.
Claim 5
Dependent Claim
23 words
THe process as set forth in claim 1 including the step of relaxing the tow as it is moved through said bulking zone.
Claim 6
Dependent Claim
35 words
The process as set forth in claim 1 including the step of passing the tow through a setting zone after said tow has been bulked to thereby stabilize the bulk in each of said strands.
Claim 7
Dependent Claim
35 words
The process as set forth in claim 1 including the step of initially forming the tow into relatively large loops within said chamber, and thereafter releasing said relatively large loops for controlled shrinking and bulking.
Claim 8
Dependent Claim
53 words
The process as set forth in claim 1 including the steps of exposing the looped tow to said bulking zone for a predetermined interval while precluding substantial shrinking of the tow, and thereafter affording a controlled degree of relaxation in the tow to permit shrinking and bulking of the strands in said tow.
Claim 9
Dependent Claim
33 words
The process as set forth in claim 7 including the step of moving the tow through a setting zone having a higher temperature than said bulking zone to thereby stabilize the bulked strands.
Claim 10
Dependent Claim
17 words
The process as set forth in claim 8 wherein said bulking zone is heated by pressurized fluid.
Claim 11
Dependent Claim
99 words
Apparatus for post treating textured yarn comprising, means for combining a plurality of strands of the textured yarn into a continuous tow, a chamber for bulking of the tow therein, support means, means for forming the tow into a series of continuous loops on said support means, means for advancing the looped tow generally along its longitudinal axis while simultaneously moving said tow around the axis of said loops relative to said support means to move said tow through said chamber, and means for separating the tow into individual bulked strands after passage of the tow through said chamber.
Claim 12
Dependent Claim
99 words
Apparatus for post treating textured yarn comprising, means for combining a plurality of strands of the textured yarn into a continuous tow, a chamber for bulking of the tow therein, support means, means for forming the tow into a series of continuous loops on said support means, means for advancing the looped tow generally along its longitudinal axis while simultaneously moving said tow around the axis of said loops relative to said support means to move said tow through said chamber, and means for separating the tow into individual bulked strands after passage of the tow through said chamber.
Claim 13
Dependent Claim
44 words
Apparatus as set forth in claim 10 wherein said chamber has opposite ends; and the moving means includes rotating means extending between said ends for receiving said loops and moving the loops from a first of said ends toward a second of said ends.
Claim 14
Dependent Claim
39 words
Apparatus as set forth in claim 11 wherein said tow forming means includes a flyer adjacent said first end of said chamber for collecting the plurality of strands and delivering said strands in a tow to said moving means.
Claim 15
Dependent Claim
74 words
Apparatus as set forth in claim 10 wherein said moving means includes a plurality of spaced apart members engaging said tow, and elongated elements disposed between said members, said elongated elements including first areas cooperative to receive the tow and form the tow into relatively large loops within said chamber, and second areas inclined to said first areas along which the tow is slidable to permit shrinkage of the tow and concomitant bulking thereof.
Claim 16
Dependent Claim
61 words
Apparatus as set forth in claim 13 wherein said spaced apart members each include a first area of generally cylindrical shape disposed in the same plane as said first areas of said elongated elements, and said spaced apart members each include a tapered section defining a second area disposed in a common plane with the second areas of said elongated elements.
Claim 17
Dependent Claim
24 words
Apparatus as set forth in claim 13 wherein said elongated elements are adjustable to control the size of said loops of tow wound thereon.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |