US3835638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing core yarn
Assignee: United States Department of Agriculture
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Filing: 1972-03-15
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Granted: 1974-09-17
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Expires: 1992-03-15
Abstract
Abstract This invention relates to a process for the continuous formation of various types of core yarn. Specifically this invention relates to the use of electrostatic, physical and chemical means for producing a core yarn. More specifically, this invention relates to a process for electrostatically, peripherally surfacing or plating a coring element with individual fibers to produce a core yarn. Still more specifically this invention relates to a process for electrostatically, peripherally surfacing or sheathing a coring element with individual fibers and means for treating the coring element with a crosslinking chemical formulation to permanently set the yarn configuration.
Inventors
- 👤 H Salaun
- 👤 R Brown
- 👤 M Mayer
- 👤 J Kotter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:22
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/36; D01; D01H; D01H4/00; D01H4/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A mechanically locked core yarn with peripherally spun fibers about a coring element, said fibers tightly held by the coring element and interlocked therewith, said interlocking effected by feeding a twisted coring element to a twisting element, rotating said twisting element in a direction to effect a false twist to at least partially untwist said coring element, attaching said peripheral fibers, releasing said false untwist to cause the normal twist of said coring element to tightly hold and interlock with said peripheral fibers.
Claim 2
Dependent Claim
83 words
A mechanically locked core yarn with peripherally spun fibers about a coring element, said fibers tightly held by the coring element and interlocked therewith, said interlocking effected by feeding a twisted coring element to a twisting element, rotating said twisting element in a direction to effect a false twist to at least partially untwist said coring element, attaching said peripheral fibers, releasing said false untwist to cause the normal twist of said coring element to tightly hold and interlock with said peripheral fibers.
References Cited (Backward Citations)
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US2208897A
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US2451881A
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US2841516A
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US2997837A
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US3285690A
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US3439491A
Cited
US3696603A
Cited
US3768243A
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |