US3756005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for forming novelty effect yarns
Assignee: Chavanoz SA
•
Filing: 1972-03-24
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Granted: 1973-09-04
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Expires: 1992-03-24
Abstract
Abstract A process for producing a novelty effect yarn having stable protuberances along the length thereof including feeding core and effect yarns to a friction false twist assembly along spaced, substantially parallel paths, the effect yarn having an irregular undulation and undergoing a sudden change in direction from the spaced path to a junction point with the core yarn, the junction point being spaced upstream from the friction element of the friction false twist assembly and the distance between the junction point and the friction element varying. Apparatus for implementing the above process including a nozzle for projecting a fluid stream to move the effect yarn along a spaced, substantially parallel path relative to the core yarn.
Inventors
- 👤 P Seguin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:48
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/34; D02G3/343
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
140 words
A process for producing a novelty effect yarn having stable protuberances along the length thereof comprising the steps of feeding a core yarn to a friction false twist assembly through a supply zone along a first path; feeding at least one effect yarn to the friction false twist assembly under low tension at a rate in excess of the feed rate of the core yarn through the supply zone along a second path in spaced, substantially parallel relation to the first path; joining the core and effect yarns at a junction point upstream of the friction element of the friction false twist assembly such that the effect yarn undergoes a sudden change in direction from the second path to the junction point; and varying the distance between the junction point and the friction element of the friction false twist assembly.
Claim 2
Dependent Claim
140 words
A process for producing a novelty effect yarn having stable protuberances along the length thereof comprising the steps of feeding a core yarn to a friction false twist assembly through a supply zone along a first path; feeding at least one effect yarn to the friction false twist assembly under low tension at a rate in excess of the feed rate of the core yarn through the supply zone along a second path in spaced, substantially parallel relation to the first path; joining the core and effect yarns at a junction point upstream of the friction element of the friction false twist assembly such that the effect yarn undergoes a sudden change in direction from the second path to the junction point; and varying the distance between the junction point and the friction element of the friction false twist assembly.
Claim 3
Dependent Claim
42 words
The process as recited in claim 1 wherein said effect yarn feeding step includes feeding the effect yarn at a tension less than 5g. and at a rate greater than 150 percent in excess of the feeding rate of the core yarn.
Claim 4
Dependent Claim
25 words
The process as recited in claim 1 wherein the first and second paths diverge slightly before the sudden change in direction of the effect yarn.
Claim 5
Dependent Claim
27 words
The process as recited in claim 3 wherein the first and second paths in the supply zone are spaced by a distance on the order of 0.5cm.
Claim 6
Dependent Claim
25 words
The process as recited in claim 1 wherein the sudden change of direction of the effect yarn is through an angle from 60* to 120*.
Claim 7
Dependent Claim
48 words
The process as recited in claim 1 wherein the core and effect yarns are spaced in the supply zone along a distance of at least 10cm. and the distance between the junction point and the friction element of the friction false twist assembly is maintained greater than 1cm.
Claim 8
Dependent Claim
44 words
The process as recited in claim 1 wherein said core yarn feeding step includes moving the core yarn along the first path in a straight line and said effect yarn feeding step includes moving the effect yarn along the second path with irregular undulations.
Claim 9
Dependent Claim
26 words
The process as recited in claim 7 wherein said effect yarn feeding step includes carrying the effect yarn along the second path with a fluid stream.
Claim 10
Dependent Claim
27 words
The process as recited in claim 8 wherein the fluid stream is directed in parallel with the first path of the core yarn through the supply zone.
Claim 11
Dependent Claim
22 words
The process as recited in claim 8 wherein the fluid flow is directed at a slight angle away from the core yarn.
Claim 12
Dependent Claim
146 words
Apparatus for forming a novelty effect yarn having stable protuberances along the length thereof comprising a friction false twist assembly carrying a friction element; core yarn delivery means for supplying a core yarn at a first rate to said friction element of said friction false twist aSsembly; effect yarn delivery means for supplying at least one effect yarn at a second rate greater than said first rate to said friction element of said friction false twist assembly; and yarn supply means disposed between said effect and core yarn delivery means and said friction element of said friction false twist assembly for moving said effect and core yarns along substantially parallel, spaced paths through a supply zone to a parallel, spaced paths through a supply zone to a junction point for the core and effect yarns spaced from said friction element of said friction false twist assembly.
Claim 13
Dependent Claim
146 words
Apparatus for forming a novelty effect yarn having stable protuberances along the length thereof comprising a friction false twist assembly carrying a friction element; core yarn delivery means for supplying a core yarn at a first rate to said friction element of said friction false twist aSsembly; effect yarn delivery means for supplying at least one effect yarn at a second rate greater than said first rate to said friction element of said friction false twist assembly; and yarn supply means disposed between said effect and core yarn delivery means and said friction element of said friction false twist assembly for moving said effect and core yarns along substantially parallel, spaced paths through a supply zone to a parallel, spaced paths through a supply zone to a junction point for the core and effect yarns spaced from said friction element of said friction false twist assembly.
Claim 14
Dependent Claim
40 words
The apparatus as recited in claim 11 wherein said yarn supply means includes nozzle means directing a fluid stream along the path for said effect yarn to maintain said effect yarn spaced from said core yarn in the supply zone.
Claim 15
Dependent Claim
23 words
The apparatus as recited in claim 12 wherein said nozzle means has a bore extending therethrough and air is forced through said bore.
Claim 16
Dependent Claim
34 words
The apparatus as recited in claim 13 wherein said nozzle means has an aperture therein to receive said effect yarn and an outlet through which said fluid stream And said effect yarn are directed.
Claim 17
Dependent Claim
24 words
The apparatus as recited in claim 14 wherein said yarn supply means includes a guide for said core yarn connected with said nozzle means.
Claim 18
Dependent Claim
31 words
The apparatus as recited in claim 15 wherein said yarn supply means includes adjustable support means interconnecting said nozzle means and said guide for varying the spacing and rotational orientation therebetween.
Claim 19
Dependent Claim
49 words
The apparatus as recited in claim 11 wherein said friction false twist assembly has a longitudinal axis of rotation and said yarn supply means has a longitudinal axis disposed at an angle between 60* and 120* relative to said longitudinal axis of rotation of said friction false twist assembly.
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |