US3653198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing a plied yarn
Assignee: JP Stevens and Co Inc
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Filing: 1969-12-04
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Granted: 1972-04-04
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Expires: 1989-12-04
Abstract
Abstract A method for plying continuous multifilament yarns with natural or synthetic yarn into a tow comprising the steps of differentially shrinking the multifilament yarn so as to form a multiplicity of yarn convolutions therein; merging the differentially shrunk filament yarn with a second yarn, and plying the merged yarns to thereby produce a plied bulk yarn having a uniform consistency along the length thereof.
Inventors
- 👤 John G Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:27
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/24; D02G1/00; D02G1/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
126 words
A method of plying a continuous multifilament thermoplastic yarn with a spun yarn comprising passing a continuous multifilament thermoplastic yarn over at least one heated surface while maintaining said multifilament yarn under a tension which permits shrinkage of individual filaments and controlling the temperature of each heated surface and the extent of contact of the multifilament yarn therewith so that shrinkage of only some of the filaments is effected and convolutions are formed in the other filaments; merging said multifilament yarn with a spun yarn; and twisting said merged yarns together, whereby a plied yarn is produced in which the spun yarn clings to the convolutions in the unshrunken filaments of the multifilament yarn resulting in a plied yarn having a uniform consistency along its length.
Claim 2
Independent Claim
126 words
A method of plying a continuous multifilament thermoplastic yarn with a spun yarn comprising passing a continuous multifilament thermoplastic yarn over at least one heated surface while maintaining said multifilament yarn under a tension which permits shrinkage of individual filaments and controlling the temperature of each heated surface and the extent of contact of the multifilament yarn therewith so that shrinkage of only some of the filaments is effected and convolutions are formed in the other filaments; merging said multifilament yarn with a spun yarn; and twisting said merged yarns together, whereby a plied yarn is produced in which the spun yarn clings to the convolutions in the unshrunken filaments of the multifilament yarn resulting in a plied yarn having a uniform consistency along its length.
Claim 3
Dependent Claim
26 words
A method according to claim 1 wherein said multifilament thermoplastic yarn is passed over two heated surfaces to effect shrinkage of only some of the filaments.
Claim 4
Dependent Claim
34 words
A method according to claim 2 wherein the temperature of the first heated surface ranges from 150* to 400* F. and the temperature of the second heated surface ranges from 300* to 600* F.
Claim 5
Dependent Claim
44 words
A method according to claim 1 wherein passage of said multifilament yarn over at least one heated surface is carried out at a yarn speed of 100 to 1,500 feet per minute while maintaining said yarn under a tension of 0.1 to 1.5 grams.
Claim 6
Dependent Claim
29 words
A method according to claim 1 wherein said multifilament thermoplastic yarn is comprised of a thermoplastic material selected from the group consisting of polyamides, acrylics, polyesters, polyolefins and tri-acetates.
Claim 7
Dependent Claim
26 words
A method according to claim 1 wherein said spun yarn is comprised of a material selected from the group consisting of cotton, flax, rayon and wool.
Claim 8
Dependent Claim
21 words
A method according to claim 1 wherein said multifilament thermoplastic yarn is polyester yarn and said spun yarn is cotton yarn.
Claim 9
Dependent Claim
18 words
A method according to claim 1 wherein said multifilament thermoplastic yarn is overfed prior to the merging step.
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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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |