US3769787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact multi-filament textile yarn and method of making the same
Assignee: Hartford Fibres Ltd
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Filing: 1971-10-26
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Granted: 1973-11-06
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Expires: 1991-10-26
Abstract
Abstract The filaments of multi-filament synthetic textile yarn are rendered and maintained sufficiently coherent and compact for high-speed fabricating purposes such as knitting, winding and weaving by continuously disposing special wrapper filaments in generally helical paths around the core filaments of the yarn, at least one such wrapper filament being disposed in a clockwise manner and another wrapper filament counter-clockwise. The wrapper filaments (drawn or undrawn) are continuously applied from over the ends of supply packages, or at the spinneret or otherwise, and if undrawn may be drawn concurrently with the core filaments.
Inventors
- 👤 N Rosenstein
- 👤 A Rosenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:34
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/38; D02G3/385
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
104 words
Compact yarn comprising a plurality of flexible continuous core filaments having substantially zero twist wrapped in coherent fashion under low tension by flexible wrapper filaments spirally arranged about and in contact with said core filaments, the number of core filaments being greater thAn the number of wrapper filaments, at least one of said wrapper filaments being arranged in a clockwise direction and at least another in a counterclockwise direction, said wrapper filaments being composed of continuous filament synthetic polymeric material, and one such wrapper filament being spiraled over the exterior of said core filaments and repeatedly and successively over another wrapper filament as well.
Claim 2
Dependent Claim
104 words
Compact yarn comprising a plurality of flexible continuous core filaments having substantially zero twist wrapped in coherent fashion under low tension by flexible wrapper filaments spirally arranged about and in contact with said core filaments, the number of core filaments being greater thAn the number of wrapper filaments, at least one of said wrapper filaments being arranged in a clockwise direction and at least another in a counterclockwise direction, said wrapper filaments being composed of continuous filament synthetic polymeric material, and one such wrapper filament being spiraled over the exterior of said core filaments and repeatedly and successively over another wrapper filament as well.
Claim 3
Dependent Claim
17 words
The yarn defined in claim 1 wherein said core filaments are continuous filaments of synthetic polymeric material.
Claim 4
Dependent Claim
33 words
The yarn defined in claim 2 wherein at least the majority of said core filaments and at least the majority of said wrapper filaments are composed of essentially the same synthetic polymeric material.
Claim 5
Dependent Claim
17 words
The yarn defined in claim 1 wherein said wrapper filaments are composed of undrawn synthetic organic material.
Claim 6
Dependent Claim
22 words
The yarn defined in claim 1 wherein both said wrapper filaments and said core filaments are composed of undrawn synthetic organic material.
Claim 7
Dependent Claim
17 words
The yarn defined in claim 1 wherein the yarn has a denier of about 10 to 10,000.
Claim 8
Dependent Claim
25 words
The yarn defined in claim 1 wherein the wrapper filaments comprise numerically about 1 percent - 20 percent of the total filaments of the yarn.
Claim 9
Dependent Claim
20 words
The yarn defined in claim 1 wherein the core filaments and the wrapper filaments are closely adjacent and randomly tangled.
Claim 10
Dependent Claim
20 words
The yarn defined in claim 1 wherein the core filaments and the wrapper filaments are twisted about the yarn axis.
Claim 11
Dependent Claim
13 words
The yarn defined in claim 5 wherein said core filaments are continuous filaments.
Claim 12
Dependent Claim
18 words
The yarn defined in claim 1, wherein the core filaments are crimped undrawn, and are subsequently heat set.
Claim 13
Dependent Claim
20 words
The yarn defined in claim 1, wherein the wrapper filaments are wrapped about said core filaments at substantially zero tension.
Claim 14
Dependent Claim
25 words
The yarn defined in claim 1, wherein the wrapper filaments comprise numerically about 2 percent to 10 percent of the total filaments of the yarn.
Claim 15
Dependent Claim
70 words
In a method of making a compact yarn, the steps which comprise continuously feeding a multiplicity of drawable continuous synthetic core filaments along a predetermined path, continuously applying a continuous synthetic drawable wrapper filament in a spiral manner around the core filaments, continuously applying another continuous synthetic drawable wrapper filament in a counter spiral manner around the core filaments plus the wrapper filament previously wrapped, and drawing the resulting yarn.
Claim 16
Dependent Claim
70 words
In a method of making a compact yarn, the steps which comprise continuously feeding a multiplicity of drawable continuous synthetic core filaments along a predetermined path, continuously applying a continuous synthetic drawable wrapper filament in a spiral manner around the core filaments, continuously applying another continuous synthetic drawable wrapper filament in a counter spiral manner around the core filaments plus the wrapper filament previously wrapped, and drawing the resulting yarn.
Claim 17
Dependent Claim
20 words
The method defined in claim 14, wherein the core filaments are crimped prior to the application of the wrapper filaments.
Claim 18
Dependent Claim
20 words
The method defined in claim 14, wherein the core filaments are dyed prior to the application of the wrapper filaments.
References Cited (Backward Citations)
US2217826A
Cited
US2427334A
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US2448782A
Cited
US3019592A
Cited
FR1412441A
Cited
US3438193A
Cited
US3675409A
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US3644866A
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |