US3732684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product and process
Assignee: EIDP Inc
•
Filing: 1971-02-23
•
Granted: 1973-05-15
•
Expires: 1991-02-23
Abstract
Abstract Novel fasciated yarns for the production of crepe fabrics are prepared from a combination of fibers of which from 1 to 40 percent by weight have an average shrinkage that is at least 5 percent above that of the average of the remaining fibers. These yarns exhibit a yarn shrinkage differential, Delta Syarn, of at least 5 percent and a standard deviation, sigma , of at least 2.8 in short-term shrinkage variability.
Inventors
- 👤 T Csok
- 👤 K Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:45
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/18; D02G3/00; D02G3/22; D02G3/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
12 words
The yarn of claim 1 wherein the fibers are acrylonitrile polymer fibers.
Claim 2
Dependent Claim
17 words
The yarn of claim 1 wherein the fibers are blends of acrylonitrile fibers and polyethylene terephthalate fibers.
Claim 3
Dependent Claim
30 words
The yarn of claim 1 wherein the yarn shrinkage differential is at least 8 percent and the standard deviation, sigma , in short-term shriNkage variability is at least about 4.
Claim 4
Dependent Claim
130 words
A process of preparing a fasciated yarn suitable for the production of crepe fabrics comprising forming a strand of blended organic fibers of which from 1 to 40 percent by weight are high-shrinkage fibers having an average shrinkage that is at least 5 percent above that of the average of the remaining fibers, drafting said strand to form a ribbon-shaped bundle, said bundle comprising discontinuous fibers and being substantially free of twist, sucking said ribbon-shaped bundle from the front drafting rolls by means of an aspirating jet of fluid and false-twisting said bundle into a yarn by feeding through a torque jet wherein discontinuous fibers of the bundle are wrapped as irregular helices around discontinuous fibers of the bundle which constitutes the core of the yarn and collecting said yarn.
Claim 5
Dependent Claim
15 words
The process of claim 5 wherein the fibers comprising the yarn are acrylonitrile polymer fibers.
Claim 6
Dependent Claim
22 words
The process of claim 5 wherein the fibers comprising the yarn are a blend of acrylonitrile polymer fibers and polyethylene terephthalate fibers.
Claim 7
Dependent Claim
25 words
The process of claim 5 wherein the high-shrinkage fibers have an average shrinkage that is at least 10 percent above that of the remaining fibers.
Claim 8
Dependent Claim
20 words
The process of claim 5 wherein the high-shrinkage fibers comprise from 4 to 16 percent by weight of the yarn.
References Cited (Backward Citations)
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US3248771A
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US3079746A
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Cited
US3445995A
Cited
US3416302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |