US3874156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for simultaneously edge-crimping and false-twisting yarn and yarn produced thereby
Assignee: Deering Milliken Research Corp
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Filing: 1973-07-02
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Granted: 1975-04-01
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Expires: 1993-07-02
Abstract
Abstract A method and apparatus for texturing yarn is provided which combines the processes of edge-crimping and false-twisting. A continuous filament thermoplastic yarn is subjected to heat after which the heated yarn is drawn over an edge-crimping member at an acute angle. Immediately following the edge-crimping operation, the yarn is false-twisted so that the twist runs back in the yarn to the edge of the edge-crimping member. The yarn is then cooled, untwisted, and collected in a yarn package.
Inventors
- 👤 Charles H Hamby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:04
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/10; D02G1/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A method for texturing a thermoplastic yarn to produce a textured torque yarn product consisting essentially of the steps of a. heating a strand of the thermoplastic yarn; b. passing the heated yarn in an acute angle and under tension about a single sharp edge; c. inserting multiple turns of twist in the moving yarn downstream of the edge to a degree such that the twist applied to the yarn backs up in the yarn strand to the sharp edge; d. allowing the yarn to cool; e. removing the inserted twist from the yarn; and f. thereafter collecting the textured torque yarn product.
Claim 2
Independent Claim
103 words
A method for texturing a thermoplastic yarn to produce a textured torque yarn product consisting essentially of the steps of a. heating a strand of the thermoplastic yarn; b. passing the heated yarn in an acute angle and under tension about a single sharp edge; c. inserting multiple turns of twist in the moving yarn downstream of the edge to a degree such that the twist applied to the yarn backs up in the yarn strand to the sharp edge; d. allowing the yarn to cool; e. removing the inserted twist from the yarn; and f. thereafter collecting the textured torque yarn product.
Claim 3
Dependent Claim
14 words
A textured yarn which is produced according to the process described in claim 1.
Claim 4
Dependent Claim
50 words
A method for texturing Yarn as defined in claim 1 wherein raw yarn having a true twist in a specific direction is utilized and wherein the yarn is twisted in twisting step (c) in a direction which is opposite to the direction of the true twist of the raw yarn.
Claim 5
Dependent Claim
28 words
A method for texturing yarn as defined in claim 1 wherein twist is inserted in the yarn by passing the yarn at least one complete turn about itself.
Claim 6
Independent Claim
109 words
A method for texturing yarn comprising the steps of: a. heating yarn; b. passing the heated yarn in an acute angle and under tension about a sharp edge; c. passing the yarn at least one complete turn about itself with the directions of movement of the yarn as it passes about itself being substantially perpendicular to insert multiple turns of twist in the moving yarn downstream of the edge to a degree such that the twist applied to the yarn backs up in the yarn to the sharp edge; d. allowing the yarn to cool; e. removing the inserted twist from the yarn; and f. collecting the textured yarn.
Claim 7
Independent Claim
109 words
A method for texturing yarn comprising the steps of: a. heating yarn; b. passing the heated yarn in an acute angle and under tension about a sharp edge; c. passing the yarn at least one complete turn about itself with the directions of movement of the yarn as it passes about itself being substantially perpendicular to insert multiple turns of twist in the moving yarn downstream of the edge to a degree such that the twist applied to the yarn backs up in the yarn to the sharp edge; d. allowing the yarn to cool; e. removing the inserted twist from the yarn; and f. collecting the textured yarn.
Claim 8
Independent Claim
122 words
A method for texturing first and second strands of yarn comprising the steps of a. heating the yarn strands; b. passing the heated yarn strands in side-by-side relation in an acute angle and under tension about a sharp edge; c. passing the moving first strand one complete turn about the second strand and passing the moving second strand one complete turn about the first strand to insert multiple turns of twist in the moving yarns downstream of the edge to a degree such that the twists applied to the yarns backs up in the yarn strands to the sharp edge; d. allowing the yarn to cool; e. removing the inserted twist from the yarn strands; and f. collecting the textured yarn strands.
Claim 9
Independent Claim
122 words
A method for texturing first and second strands of yarn comprising the steps of a. heating the yarn strands; b. passing the heated yarn strands in side-by-side relation in an acute angle and under tension about a sharp edge; c. passing the moving first strand one complete turn about the second strand and passing the moving second strand one complete turn about the first strand to insert multiple turns of twist in the moving yarns downstream of the edge to a degree such that the twists applied to the yarns backs up in the yarn strands to the sharp edge; d. allowing the yarn to cool; e. removing the inserted twist from the yarn strands; and f. collecting the textured yarn strands.
Claim 10
Dependent Claim
29 words
A method for texturing yarn as defined in claim 6 wherein the directions of movement of the strands of yarn as they pass over each other are substantially perpendicular.
Claim 11
Dependent Claim
40 words
A method for texturing yarn as defined in claim 6 wherein yarns having true twist therein are employed in the texturing method and the twist inserted in the twisting step is in an opposite direction to the true twist therein.
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |