US3831365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for applying a false twist to yarns
Assignee: Individual
•
Filing: 1973-10-26
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Granted: 1974-08-27
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Expires: 1993-10-26
Abstract
Abstract A false twist is applied to a continuously advancing yarn by tangential contact of a first run of the yarn with a series of yarn flights that intersect and rotate the first run of yarn by frictional contact therewith. The yarn passes around a plurality of freely rotatable rollers and forms a series of yarn flights which intersect and frictionally contact the first run of yarn to apply a false twist thereto.
Inventors
- 👤 J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:07
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/08; D02G1/085
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
70 words
The method of false twisting advancing yarns comprising; directing a first run of an advancing yarn longitudinally in a prescribed path, directing the advancing yarn downstream of the first run in a selected pattern to define a plurality of intersecting yarn flights in frictional engagement with the first run of yarn, and displacing the intersecting yarn flights in prescribed directions for imparting a rotational force to the first yarn run.
Claim 2
Independent Claim
70 words
The method of false twisting advancing yarns comprising; directing a first run of an advancing yarn longitudinally in a prescribed path, directing the advancing yarn downstream of the first run in a selected pattern to define a plurality of intersecting yarn flights in frictional engagement with the first run of yarn, and displacing the intersecting yarn flights in prescribed directions for imparting a rotational force to the first yarn run.
Claim 3
Dependent Claim
22 words
The method as recited in claim 1, wherein the intersecting yarn flights are substantially normal to the first run of advancing yarn.
Claim 4
Dependent Claim
22 words
The method of claim 1, wherein the yarn is directed in a selected pattern to form spaced series of intersecting yarn flights.
Claim 5
Dependent Claim
25 words
The method as recited in claim 1, wherein the yarn flights intersect to form a triangle and the first yarn run passes through the triangle.
Claim 6
Dependent Claim
24 words
The method of claim 3, wherein the spaced series of intersecting yarn flights apply rotational and longitudinal forces to the first run of yarn.
Claim 7
Dependent Claim
41 words
The method of claim 1, and further applying a force longitudinally of the yarn downstream of yarn forming the selected pattern for directing the yarn through the selected pattern to impart a unidirectional rotation to the yarn forming the first run.
Claim 8
Independent Claim
167 words
An apparatus for applying a false twist to an advancing textile yarn comprising, support means, a plurality of elongated elements mounted in spaced, generally parallel relation upon said support means and each element having a surface region for frictionally contacting the yarn, means for directing an advancing yarn in a first run in spaced relation to and generally parallel to the axes of said elongated elements and for guiding the yarn from the first run in a path into contact with the surface region of one of said elongated elements, said elongated elements being selectively positioned such that yarn is directed thereabout in a plurality of yarn flights with the yarn flights intersecting to define a channel for passage of the first run of yarn, said first run of yarn being substantially normal to the yarn flights, and at least a plurality of yarn flights frictionally engaging the first yarn run to impart unidirectional rotary movement thereto upon advancement of the yarn directed about the elongated elements.
Claim 9
Independent Claim
167 words
An apparatus for applying a false twist to an advancing textile yarn comprising, support means, a plurality of elongated elements mounted in spaced, generally parallel relation upon said support means and each element having a surface region for frictionally contacting the yarn, means for directing an advancing yarn in a first run in spaced relation to and generally parallel to the axes of said elongated elements and for guiding the yarn from the first run in a path into contact with the surface region of one of said elongated elements, said elongated elements being selectively positioned such that yarn is directed thereabout in a plurality of yarn flights with the yarn flights intersecting to define a channel for passage of the first run of yarn, said first run of yarn being substantially normal to the yarn flights, and at least a plurality of yarn flights frictionally engaging the first yarn run to impart unidirectional rotary movement thereto upon advancement of the yarn directed about the elongated elements.
Claim 10
Dependent Claim
23 words
An apparatus for applying a false twist to a yarn as recited in claim 7, wherein said elongated elements comprise freely rotatable rollers.
Claim 11
Dependent Claim
48 words
An apparatus for applying a false twist to a textile yarn as recited in claim 8, wherein the surface region of each roller is provided with a plurality of yarn receiving annular grooves, said yarn being wound around said rollers to form a series of intersecting yarn flights.
Claim 12
Dependent Claim
39 words
An apparatus for applying a false twist to a yarn as recited in claim 9, wherein the yarn progressively moves from the lowermost to the uppermost grooves of said rollers thereby facilitating longitudinal displacement of the yarn first run.
Claim 13
Dependent Claim
49 words
An apparatus for applying a false twist to a yarn as recited in claim 7, wherein a plurality of advancing yarns are directed in spaced parallel runs and around said elongated elements with the intersecting yarn flights defining a plurality of channels, the yarn being received in each channel.
Claim 14
Dependent Claim
47 words
An apparatus for applying a false twist to a yarn as recited in claim 11, wherein one yarn with a channel has an S twist applied by intersecting yarn flights and another yarn within a second channel has a Z twist applied thereto by intersecting yarn flights.
Claim 15
Dependent Claim
51 words
An apparatus for applying a false twist to an advancing textile yarn as recited in claim 7, and further including means for applying a longitudinal force to the yarn for drawing the yarn about the elongated elements to impart a torque to the first run of yarn by said yarn flights.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |