US3703753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a bulked yarn and apparatus therefor
Assignee: Celanese Corp
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Filing: 1971-05-05
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Granted: 1972-11-28
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Expires: 1991-05-05
Abstract
Abstract A method for producing a yarn having latent bulking characteristics and the apparatus therefor is described. The yarn is composed of multifilament synthetic fibers which have been crimped and subjected to a constant tensioning process. The process involves subjecting a drawn yarn, preferably freshly drawn, to a crimping process which can be any of a number of crimping methods including stuffer box crimping, gear crimping, steam jet crimping and the like. The yarn emerges from the crimping step under a low, substantially uniform tension, is tensioned under a higher constant tension to at least partially extend the crimps, is entangled or twisted and then taken up on a package. The bulk characteristics of the yarn are preferably developed after incorporation into the end product such as a carpet by subjection to heat and moisture.
Inventors
- 👤 Jack C Binford
- 👤 Frederick A Ethridge
- 👤 James R Talbot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:36
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/16; D02G1/168
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
134 words
A process for producing a crimped yarn which comprises feeding a multifilament yarn to a stream of superheated steam being jetted into a jet device so that the individual filaments of the yarn in said jet device are whipped in a turbulent stream of said superheated steam to impart a persistent, random threedimensional, curvilinear crimp to said filaments; exiting said crimped yarn from said jet device; cooling said yarn and tensioning said yarn at a first low, substantially constant tension prior to further processing and/or packaging, said yarn being overfed about 15 to 60 percent through said jet device, said overfeed being determined between a first yarn forwarding speed controllable device, feeding said yarn into said jet device and a second yarn forwarding speed controllable device at the downstream end of said tension zone.
Claim 2
Dependent Claim
134 words
A process for producing a crimped yarn which comprises feeding a multifilament yarn to a stream of superheated steam being jetted into a jet device so that the individual filaments of the yarn in said jet device are whipped in a turbulent stream of said superheated steam to impart a persistent, random threedimensional, curvilinear crimp to said filaments; exiting said crimped yarn from said jet device; cooling said yarn and tensioning said yarn at a first low, substantially constant tension prior to further processing and/or packaging, said yarn being overfed about 15 to 60 percent through said jet device, said overfeed being determined between a first yarn forwarding speed controllable device, feeding said yarn into said jet device and a second yarn forwarding speed controllable device at the downstream end of said tension zone.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said first low tension is in the range of about 0.003 to 0.2 grams per denier.
Claim 4
Dependent Claim
22 words
The process of claim 2 wherein said first low tension is in the range of about 0.01 to 0.2 gram per denier.
Claim 5
Dependent Claim
12 words
The process of claim 2 wherein said yarn is compacted after tensioning.
Claim 6
Dependent Claim
22 words
The process of claim 1 wherein said first low tension is applied by a tension jet impinging pressurized gas against said yarn.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein said tension jet quenches the yarn.
Claim 8
Dependent Claim
44 words
The process of claim 1 wherein after first tensioning the tension on said yarn is increased in a tension zone to a second substantially constant tension between about 0.03 and 1.0 grams per denier to at least partially reduce the amplitude of said crimps.
Claim 9
Dependent Claim
34 words
The process of claim 7 wherein said first tensioning includes a pretensioning to about 0.003 to 0.08 grams per denier said second tensioning increases yarn tension to about 0.001 to 0.5 grams per denier.
Claim 10
Dependent Claim
21 words
The process of claim 1 wherein the speed of the yarn is not additionally controlled between said first and second devices.
Claim 11
Dependent Claim
24 words
The process of claim 1 wherein the yarn mass per unit length of yarn remains constant between said first tensioning and said second tensioning.
Claim 12
Dependent Claim
13 words
The process of claim 1 wherein said yarn is formed of a polyamide.
Claim 13
Dependent Claim
22 words
The process of claim 1 wherein said yarn exits from said jet device into a yarn confining chamber prior to constant tensioning.
Claim 14
Dependent Claim
13 words
The process of claim 1 wherein said yarn is formed of a polyester.
Claim 15
Dependent Claim
18 words
The process of claim 1 wherein said yarn is overfed 20 to 40 percent through said jet device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |