Patent US4466237A successfully refreshed from Google Patents.
US4466237A
Expired / Lapsed
US
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Mixed fiber length yarn
Assignee: Invista North America LLC
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Filing: 1982-09-30
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Granted: 1984-08-21
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Expires: 2002-09-30
Abstract
Abstract A novel synthetic yarn is disclosed which comprises fibers of different lengths (as specified). At least three groups of synthetic fibers are present in the yarn, with the synthetic fibers within each group being substantially uniform in length. The substantially uniform length of each group of synthetic fibers present in the yarn differs from the substantially uniform length of the synthetic fibers in the other groups. The use of such mixtures of fiber lengths in a synthetic yarn enables the yarn to exhibit physical characteristics such as high bulk which more closely resemble the characteristics of natural fiber-containing yarns. Fabrics having improved physical characteristics may also be produced from the novel synthetic yarns disclosed.
Inventors
- 👤 Linda C. Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:51
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/298
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
220 words
In a yarn comprised of a blend of synthetic fibers of different length, the improvment wherein the synthetic fibers present in the yarn comprise at least about 50 percent by weight of the fibers within said yarn and consist of a mixture of at least three groups of synthetic fibers, each group consisting of synthetic fibers of a substantially uniform length such that the fiber lengths within each group differ by a factor of 5 percent or less, and which differs from the substantially uniform length of the synthetic fibers in the other groups by a factor of at least about 15 percent, and wherein the synthetic fibers contained within said at least three groups of synthetic fibers are distributed among each of the following ranges based upon the weight of the fibers present in said at least three groups: (a) up to about 75 percent by weight of fibers having a length of about X, wherein X represents the length of the longest synthetic fiber in said groups; (b) up to about 75 percent by weight of fibers having a length greater than about 1/2X up to but not including said length of about X; and (c) up to about 35 percent by weight of fibers having a length less than or equal to said length of about 1/2X.
Claim 2
Dependent Claim
220 words
In a yarn comprised of a blend of synthetic fibers of different length, the improvment wherein the synthetic fibers present in the yarn comprise at least about 50 percent by weight of the fibers within said yarn and consist of a mixture of at least three groups of synthetic fibers, each group consisting of synthetic fibers of a substantially uniform length such that the fiber lengths within each group differ by a factor of 5 percent or less, and which differs from the substantially uniform length of the synthetic fibers in the other groups by a factor of at least about 15 percent, and wherein the synthetic fibers contained within said at least three groups of synthetic fibers are distributed among each of the following ranges based upon the weight of the fibers present in said at least three groups: (a) up to about 75 percent by weight of fibers having a length of about X, wherein X represents the length of the longest synthetic fiber in said groups; (b) up to about 75 percent by weight of fibers having a length greater than about 1/2X up to but not including said length of about X; and (c) up to about 35 percent by weight of fibers having a length less than or equal to said length of about 1/2X.
Claim 3
Dependent Claim
35 words
The yarn of claim 1 wherein the synthetic fibers within said at least three groups are comprised of a polymeric material selected from the group consisting of linear terephthalate polyesters, cellulose acetate, acrylics, and polyamides.
Claim 4
Dependent Claim
12 words
The yarn of claim 2 wherein said polymeric material is polyethylene terephthalate.
Claim 5
Dependent Claim
15 words
The yarn of claim 1 wherein X ranges from about 1 to about 6 inches.
Claim 6
Dependent Claim
11 words
The yarn of claim 4 wherein X is about 6 inches.
Claim 7
Dependent Claim
11 words
The yarn of claim 4 wherein X is about 3 inches.
Claim 8
Dependent Claim
11 words
The yarn of claim 4 wherein X is about 11/2 inches.
Claim 9
Dependent Claim
22 words
The yarn of claim 1 wherein at least a portion of said synthetic fibers within said at least three groups are crimped.
Claim 10
Dependent Claim
26 words
The yarn of claim 1 wherein at least a portion of said synthetic fibers within said at least three groups have an irregularly-shaped or non-circular cross-section.
Claim 11
Dependent Claim
94 words
The yarn of claim 1 wherein the synthetic fibers within said at least three groups are distributed among each of the following ranges: (a) between about 25 and about 50 percent by weight of fibers having a length of about X; (b) between about 25 and about 50 percent by weight of fibers having a length greater than about 1/2X up to but not including said length of about X; and (c) up to about 30 percent by weight of fibers having a length less than or equal to said length of about 1/2X.
Claim 12
Dependent Claim
35 words
The yarn of claim 10 wherein said synthetic fibers having a length less than or equal to said length of about 1/2X are present in an amount of less than about 20 percent by weight.
Claim 13
Dependent Claim
122 words
The yarn of claim 1 wherein said length of about X is about 11/4 inches and the synthetic fibers within said at least three groups are distributed as follows: (a) about 20 percent by weight of fibers having a length of about 11/4 inches; (b) about 40 percent by weight of fibers having a length ranging from about 1 inch up to but not including said length of about 11/4 inches; (c) about 25 percent by weight of fibers having a length ranging from about 3/4 of an inch up to but not including said length of about 1 inch; and (d) about 15 percent by weight of fibers having a length less than said length of about 3/4 of an inch.
Claim 14
Dependent Claim
84 words
The yarn of claim 12 wherein the synthetic fibers within said at least three groups are distributed as follows: (a) about 20 percent by weight of fibers having a length of about 11/4 inches; (b) about 40 percent by weight of fibers having a length of about 1 inch; (c) about 25 percent by weight of fibers having a length of about 3/4 of an inch; and (d) about 15 percent by weight of fibers having a length of about 1/2 of an inch.
Claim 15
Dependent Claim
52 words
The yarn of claim 1 wherein the substantially uniform length of the synthetic fibers within each of the at least three groups present in the yarn differs from the substantially uniform length of the synthetic fibers in the other groups by a factor of between about 15 percent and about 30 percent.
Claim 16
Dependent Claim
12 words
The yarn of claim 1 wherein the yarn additionally comprises natural fibers.
Claim 17
Dependent Claim
21 words
The yarn of claim 15 wherein said natural fibers are selected from the group consisting of cotton fibers and wool fibers.
Claim 18
Dependent Claim
29 words
The yarn of claim 1 wherein the fibers within said at least three groups comprise at least about 65 percent by weight of the fibers present in the yarn.
Claim 19
Dependent Claim
28 words
The yarn of claim 17 wherein the fibers within said at least three groups of fibers comprise 100 percent by weight of the fibers present in the yarn.
Claim 20
Dependent Claim
8 words
A fabric containing the yarn of claim 1.
Claim 21
Dependent Claim
18 words
The yarn of claim 1 wherein the yarn additionally comprises natural fibers, other synthetic fibers or mixtures thereof.
Claim 22
Dependent Claim
38 words
The yarn of claim 20 wherein said natural fibers are selected from the group consisting of cotton fiber and wool fiber and said synthetic fibers are selected from the group consisting of cellulose acetate, rayon, acrylics and polyamides.
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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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |