US3844098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for the manufacture of twisted and plied yarn
Assignee: Commonwealth Scientific and Industrial Research Organisation
•
Filing: 1973-04-06
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Granted: 1974-10-29
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Expires: 1993-04-06
Abstract
Abstract In a spinning operation in which two strands are fed from separate nip positions and are twisted together into a single ply at a convergence point, twist is incorporated into the single strands by intermittently blocking the twist at a position between the convergence point of the strands and the point of application of the twist. The operation can be performed by a standard spinning frame modified to incorporate a convergence guide and a twist blocking device.
Inventors
- 👤 D Plate
- 👤 J Feehan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:25
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/26; D02G3/28; D02G3/288
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
70 words
A process for producing a yarn, comprising at least two strands plied together, and wherein there is twist in each individual strand, which process comprises the steps of separately feeding each strand from a feeding point, converging the strands at a convergence point, twisting the strands together, and intermittently blocking the twist at a position between the convergence point of the strands and the point of application of the twist.
Claim 2
Dependent Claim
70 words
A process for producing a yarn, comprising at least two strands plied together, and wherein there is twist in each individual strand, which process comprises the steps of separately feeding each strand from a feeding point, converging the strands at a convergence point, twisting the strands together, and intermittently blocking the twist at a position between the convergence point of the strands and the point of application of the twist.
Claim 3
Dependent Claim
21 words
A process according to claim 1, wherein the twist is blocked by nipping the converged strands between two co-operating nipping members.
Claim 4
Dependent Claim
19 words
A process according to claim 1, wherein the feeding points are both disposed on a single conventional drafting unit.
Claim 5
Dependent Claim
22 words
A process according to claim 1, wherein the rates of feeding of the strands from their respective feeding points are substantially equal.
Claim 6
Dependent Claim
27 words
A process according to claim 1, wherein the feeding points are arranged so that the strands are disposed symmetrically about a plane passing through the convergence point.
Claim 7
Dependent Claim
89 words
A process for producing a yarn, comprising at least two strands plied together, and wherein there is twist in each individual strand, which process comprises the steps of separately feeding each strand from a feeding point, twisting the strands together, and, at a position between the convergence point of the strands and the point of application of the twist, intermittently nipping the converged strands between two co-operating nipping members said feeding points being arranged so that the strands are disposed symmetrically about a plane passing through the convergence point.
Claim 8
Dependent Claim
89 words
A process for producing a yarn, comprising at least two strands plied together, and wherein there is twist in each individual strand, which process comprises the steps of separately feeding each strand from a feeding point, twisting the strands together, and, at a position between the convergence point of the strands and the point of application of the twist, intermittently nipping the converged strands between two co-operating nipping members said feeding points being arranged so that the strands are disposed symmetrically about a plane passing through the convergence point.
Claim 9
Dependent Claim
82 words
Apparatus for producing a yarn comprising at least two strands plied together and wherein there is twist in each individual strand, which apparatus comprises means for separately feeding each strand from a feeding point, convergence means for converging the separate strands, twisting means for applying twist to the converged strands to twist them together, and intermittently operable twist blocking means for effecting intermittent blocking of the twist at a position between the convergence means and the point of application of the twist.
Claim 10
Dependent Claim
82 words
Apparatus for producing a yarn comprising at least two strands plied together and wherein there is twist in each individual strand, which apparatus comprises means for separately feeding each strand from a feeding point, convergence means for converging the separate strands, twisting means for applying twist to the converged strands to twist them together, and intermittently operable twist blocking means for effecting intermittent blocking of the twist at a position between the convergence means and the point of application of the twist.
Claim 11
Dependent Claim
25 words
Apparatus according to claim 7, wherein the twist blocking means comprises a pair of co-operating nipping members arranged to intermittently nip the converged strands therebetween.
Claim 12
Dependent Claim
53 words
Apparatus according to claim 8, wherein the nipping members comprise a pair of rollers arranged to form a nip between them, at least one of said rollers having a relieved portion on its circumference such that on rotation of the rollers the nipping of twisted strands is rendered intermittent by said relieved portion.
Claim 13
Dependent Claim
18 words
Apparatus according to claim 7 wherein the feeding points are both disposed on a single conventional drafting unit.
Claim 14
Dependent Claim
21 words
Apparatus according to claim 7 wherein the rates of feeding of the strands from their respective feeding points are substantially equal.
Claim 15
Dependent Claim
29 words
Apparatus according to claim 7, wherein the means for feeding each strand are so arranged that the strands are disposed symmetrically about a plane passing through the convergence point.
Claim 16
Dependent Claim
107 words
Apparatus for producing a yarn comprising at least two strands plied together and wherein there is twist in each individual strand, which apparatus comprises means for separately feeding each strand from a feeding point, convergence means for converging the separate strands, twisting means for applying twist to the converged strands to twist them together, and, at a position between the convergence means and the point of application of the twist, a pair of co-operating nipping members arranged to intermittently nip the converged strands therebetween, the means for feeding each strand being so arranged that the strands are disposed symmetrically about a plane passing through the convergence point.
Claim 17
Dependent Claim
107 words
Apparatus for producing a yarn comprising at least two strands plied together and wherein there is twist in each individual strand, which apparatus comprises means for separately feeding each strand from a feeding point, convergence means for converging the separate strands, twisting means for applying twist to the converged strands to twist them together, and, at a position between the convergence means and the point of application of the twist, a pair of co-operating nipping members arranged to intermittently nip the converged strands therebetween, the means for feeding each strand being so arranged that the strands are disposed symmetrically about a plane passing through the convergence point.
Claim 18
Dependent Claim
53 words
Apparatus according to claim 13, wherein the nipping members comprise a pair of rollers arranged to form a nip between them, at least one of said rollers having a relieved portion on its circumference such that on rotation of the rollers the nipping of twisted strands is rendered intermittent by said relieved portion.
Claim 19
Dependent Claim
19 words
Apparatus according to claim 13, wherein the the feeding points are both disposed on a single conventional drafting unit.
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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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |