US3846969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
False-twist texturing yarn of polyester filaments having multilobal cross sections
Assignee: EIDP Inc
•
Filing: 1973-08-30
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Granted: 1974-11-12
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Expires: 1993-08-30
Abstract
Abstract Multifilament polyester yarn, of multilobal filaments having specified cross-sectional characteristics, is false-twist textured into yarn which provides fabrics having improved visual aesthetics. The examples illustrate that freedom from objectionable glitter is obtained with 6 to 10-lobed filaments, having essentially symmetric lobes of equal length equispaced around a central axis of the filament, when the modification ratio is from 1.17 to 1.85, and the denier per filament is between 3.8 and a maximum value which is a function of the modification ratio and the number of lobes.
Inventors
- 👤 J Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:35
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/253; D02; D02G; D02G1/00; D02G1/02; D02G1/0286; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2978
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
61 words
AN IMPROVEMENT IN MULTIFILAMENT POLYESTER YARN FOR FALSE-TWIST TEXTURING AT A MAXIMUM RATIO (R) OF OUTPUT-TOINPUT OF UP TO 6:1, WHEREIN THE IMPROVEMENT COMPRISES YARN COMPOSED OF POLYESTER FILAMENTS OF MULTILOBAL CROSS SECTION CHARACTERIZED BY A TOTAL NUMBER (N) OF 6 TO 10 ESSENTIALLY SYMMETRIC LOBES OF SUBSTANTIALLY EQUAL LENGTH, EQUISPACED RADIALLY ABOUT THE CENTER OF THE FILAMENT, AND HAVING BETWEEN
Claim 2
Dependent Claim
61 words
AN IMPROVEMENT IN MULTIFILAMENT POLYESTER YARN FOR FALSE-TWIST TEXTURING AT A MAXIMUM RATIO (R) OF OUTPUT-TOINPUT OF UP TO 6:1, WHEREIN THE IMPROVEMENT COMPRISES YARN COMPOSED OF POLYESTER FILAMENTS OF MULTILOBAL CROSS SECTION CHARACTERIZED BY A TOTAL NUMBER (N) OF 6 TO 10 ESSENTIALLY SYMMETRIC LOBES OF SUBSTANTIALLY EQUAL LENGTH, EQUISPACED RADIALLY ABOUT THE CENTER OF THE FILAMENT, AND HAVING BETWEEN
Claim 3
Dependent Claim
21 words
17 AND 1.85 MODIFICATION RATIO (M), THE FILAMENTS HAVING A DENIER PER FILAMENT BETWEEN 3.8(R) AND (5.88M - 10 + N)(R).
Claim 4
Dependent Claim
21 words
17 AND 1.85 MODIFICATION RATIO (M), THE FILAMENTS HAVING A DENIER PER FILAMENT BETWEEN 3.8(R) AND (5.88M - 10 + N)(R).
Claim 5
Dependent Claim
12 words
Yarn as defined in claim 1 wherein said polyester is polyethylene terephthalate.
Claim 6
Dependent Claim
26 words
Yarn as defined in claim 1 wherein said polyester is an ethylene terephthalate copolyester containing about 2 mole percent of 5-sodium-sulfo-isophthalate units in the polymer chain.
Claim 7
Dependent Claim
14 words
Yarn as defined in claim 1 wherein said polyester filaments have octalobal cross sections.
Claim 8
Dependent Claim
14 words
Yarn as defined in claim 1 wherein said polyester filaments have positive lobe angles.
Claim 9
Dependent Claim
47 words
A false-twist textured yarn product of the polyester yarn defined in claim 1, wherein less than 12 percent of the filaments have a flattened cross-sectional periphery of greater than 10 microns and the filaments have a denier per filament between 3.8 and 5.88M - 10 + N.
Claim 10
Dependent Claim
15 words
Polyester yarn as defined in claim 6 wherein said polyester is an ethylene terephthalate polymer.
Claim 11
Dependent Claim
27 words
Polyester yarn as defined in claim 6 wherein said polyester is an ethylene terephthalate copolyester containing about 2 mole percent of 5-sodium-sulfo-isophthalate units in the polymer chain.
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US3156607A
Cited
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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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |