US4145869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slub yarn and method of forming same
Assignee: EIDP Inc
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Filing: 1977-10-25
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Granted: 1979-03-27
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Expires: 1997-10-25
Abstract
Abstract There is disclosed a variable denier, multifilament yarn having a slub yarn plied with a carrier yarn and displaying high weaving performance. The yarn is characterized by a certain slub size distribution, a certain minimum number of slubs, a specified maximum number of large slubs, less than one tight spot per meter and a coherency factor of from about 4-14, said coherency factor increasing as the number of large slubs increases. A process for making the yarn is also disclosed and includes the features of feeding both feed yarn and carrier yarn to a supply jet, the feed yarn being overfed while the carrier yarn is maintained under zero net overfeed, forwarding the carrier yarn to a slub jet and forwarding the feed yarn to a foraminous surface where slubs are created and thereafter combining both yarns and passing them sequentially through a slub jet, at least one interlacing jet and, optionally, a torque jet.
Inventors
- 👤 William J. Duncan
- 👤 Michael H. Mainz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:29
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/34; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2976
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A variable denier, multifilament yarn having a slub yarn plied with a carrier yarn, said yarn having compact portions of substantially uniform denier and from about 120-800 slubs per 914 meters, said slubs being randomly distributed along said yarn; about 20-95% of said slubs having a segment with a denier ratio greater than about 7; and less than 1% of said slubs having a segment with a denier ratio greater than about 40; said yarn being further characterized by having no more than 30 slubs with a denier of 1500 or greater per 914 meters of yarn, less than one tight spot per meter, and a coherency factor for combined yarn between slubs of from about 4-14, said coherency factor increasing as the number of large slubs increases.
Claim 2
Dependent Claim
128 words
A variable denier, multifilament yarn having a slub yarn plied with a carrier yarn, said yarn having compact portions of substantially uniform denier and from about 120-800 slubs per 914 meters, said slubs being randomly distributed along said yarn; about 20-95% of said slubs having a segment with a denier ratio greater than about 7; and less than 1% of said slubs having a segment with a denier ratio greater than about 40; said yarn being further characterized by having no more than 30 slubs with a denier of 1500 or greater per 914 meters of yarn, less than one tight spot per meter, and a coherency factor for combined yarn between slubs of from about 4-14, said coherency factor increasing as the number of large slubs increases.
Claim 3
Dependent Claim
38 words
The yarn of claim 1 having no more than 20 slubs of a denier of 1500 or greater per 914 meters of yarn, a coherency factor of from about 5-10, and from about 150-500 slubs per 914 meters.
Claim 4
Dependent Claim
35 words
The yarn of claim 1 wherein the slub yarn filaments consist essentially of a fiber-forming polyamide prepared from bis(4-aminocyclohexyl) methane or ethane and a saturated dicarboxylic acid having 9-16 carbon atoms in a straight chain.
Claim 5
Dependent Claim
24 words
The yarn of claim 3 wherein the polyamide is prepared from bis(4-aminocyclohexyl) methane having 70-100% by weight of the trans-trans isomer and dodecanedioic acid.
Claim 6
Dependent Claim
68 words
The yarn of claim 3 wherein the slub yarn component is a mixed shrinkage yarn consisting essentially of homopolymer filaments prepared from bis(4-aminocyclohexyl) methane having a trans-trans isomer content of 70% by weight and dodecanedioic acid and copolymer filaments prepared from said bis(4-aminocyclohexyl)methane and a mixture of dodecanedioic acid and isophthalic acid, about 10 mol percent of the repeating units of the copolymer being due to isophthalic acid.
Claim 7
Dependent Claim
202 words
A process for producing a slub yarn plied with a carrier yarn consisting essentially of continuously feeding a carrier yarn and a multifilament feed yarn to a supply jet, said feed yarn being from about 3-70% overfed to said supply jet and said carrier yarn being under zero net overfeed; forwarding the carrier yarn directly to a slub jet and forwarding the feed yarn in a high velocity stream of compressible fluid onto a foraminous surface of substantially uniform porosity; directing a second high velocity stream of compressible fluid from the slub jet against the foraminous surface to provide a turbulent zone between the two streams adjacent to the foraminous surface; entangling slubs in the combined yarns by continuously withdrawing the feed yarn from the foraminous surface through the turbulent zone and by passing the combined yarns through the slub jet in a direction countercurrent to the stream coming therefrom; passing the combined yarns through at least one interlacing jet and entangling the yarn plies with a high velocity stream of compressible fluid directed at the axis of the yarn channel of said jet, the pressure of the fluid in said interlacing jet being from about 2.1-3.5 kg/cm 2 gage (30-50 psig).
Claim 8
Dependent Claim
202 words
A process for producing a slub yarn plied with a carrier yarn consisting essentially of continuously feeding a carrier yarn and a multifilament feed yarn to a supply jet, said feed yarn being from about 3-70% overfed to said supply jet and said carrier yarn being under zero net overfeed; forwarding the carrier yarn directly to a slub jet and forwarding the feed yarn in a high velocity stream of compressible fluid onto a foraminous surface of substantially uniform porosity; directing a second high velocity stream of compressible fluid from the slub jet against the foraminous surface to provide a turbulent zone between the two streams adjacent to the foraminous surface; entangling slubs in the combined yarns by continuously withdrawing the feed yarn from the foraminous surface through the turbulent zone and by passing the combined yarns through the slub jet in a direction countercurrent to the stream coming therefrom; passing the combined yarns through at least one interlacing jet and entangling the yarn plies with a high velocity stream of compressible fluid directed at the axis of the yarn channel of said jet, the pressure of the fluid in said interlacing jet being from about 2.1-3.5 kg/cm 2 gage (30-50 psig).
Claim 9
Dependent Claim
26 words
The process of claim 6 wherein the yarn plies are entangled by passing the combined yarns through two interlacing jets, each having a single fluid conduit.
Claim 10
Dependent Claim
24 words
The process of claim 7 wherein the feed yarn is withdrawn from the foraminous surface at a rate which provides from about 5-20% overfeed.
Claim 11
Dependent Claim
40 words
The process of claim 6 wherein the combined yarn is thereafter false twisted by passing the yarn through a torque jet in which a high velocity stream of compressed air is directed tangentially into the yarn channel of said jet.
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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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |