US3710599A
Expired / Lapsed
US
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Warp knit combination elastic fabric having integrally knit two-way stretch and one-way stretch portions, and method of making such fabric
Assignee: INT STRETCH PROD Inc
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Filing: 1970-12-03
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Granted: 1973-01-16
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Expires: 1990-12-03
Abstract
Abstract The invention is directed to a combination elastic fabric of warp knit construction, as distinguished from circular knit, woven, etc., which is comprised of distinct but integrally knitted portions having two-way elasticity and one-way elasticity, respectively, and being characterized particularly by the ability of the fabric to lay flat in its relaxed condition for handling and cutting. In one of its most advantageous forms, the new combination elastic fabric is constructed in the form of a girdle fabric having a body portion of two-way elasticity and selvedge portions of one-way elasticity. One selvedge portion constitutes a waistband elastic, while the other selvedge portion constitutes a leg band elastic. The thus integrally knitted combination fabric may be conveniently handled, cut and sewn to construct a girdle or panty girdle, realizing significant economies relative to conventional manufacturing processes. The new combination fabric of the invention is characterized by the fact that the different component portions of the fabric can have significantly different characteristics of extensibility. For example, the selvedge portion may have a significantly greater extensibility than the body portion and one selvedge portion may have a significantly greater extensibility than the other, as may be desired in the construction of a garment having waistband and leg band selvedges, for example. The fabric of the invention incorporates elastic yarns in its construction. However, in each instance, the elastic yarn is laid in, rather than knitted in, to the fabric structure. In the oneway stretch portions of the fabric, the elastic yarns are laid in across one needle space; in the two-way stretch portions of the fabric, the elastic yarns are either laid in across more than one needle space, or a bidirectional stretch is derived from a ground stitch extending across more than one needle space. In addition, certain important relationships are maintained between yarn weights and knitting tensions, in order to achieve the desired different degrees of extensibility in the various component portions of the fabric, while, at the same time, retaining the critically important ability of the fabric to lay flat in its relaxed condition.
Inventors
- 👤 L Sarmiento
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:10
CPC Classifications
D; D04; D04B; D04B21/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
289 words
A warp knit combination elastic fabric comprising a. at least one unidirectionally elastic portion; b. said unidirectionally elastic portion comprising a ground stitch structure of chain stitch wales formed of nonelastomeric yarNs and non-elastomeric lateral running yarns laid into said stitch structure and interconnecting said wales; c. first elastomeric yarns laid in along the wales of said unidirectionally elastic portion; d. said first elastomeric yarns being laid in each of said wales; e. first elastomeric yarns, in the relaxed condition of the fabric, laying substantially in the wales in which they were laid; f. at least one bidirectionally elastic fabric portion integrally knitted together with said unidirectionally elastic portion; g. said bidirectionally elastic portion having a ground stitch structure of non-elastomeric yarns in which individual nonelastomeric yarns form stitches in more than one wale, laterally interconnecting said wales; h. the non-elastomeric yarns forming the ground stitch structure of the said unidirectionally elastic fabric portion being of at least about fifty percent higher denier and having a looser stitch construction than the non-elastomeric yarns forming the ground stitch structure of the said bidirectionally elastic portion; i. second elastomeric yarns, of lower denier than the first elastomeric yarns, laid in along the wales of the bidirectionally elastic portion under lower tension than said first elastomeric yarns; j. said second elastomeric yarns being laid in across a plurality of wales; k. said second elastomeric yarns, in the relaxed condition of the fabric, lying substantially in a single wale; l. the said lateral running yarns of said unidirectionally elastic portion extending across at least two stitches and being at least about twice the denier of the other nonelastomeric yarns of the fabric, to impart a substantial wall stiffness to said unidirectionally elastic portion.
Claim 2
Dependent Claim
289 words
A warp knit combination elastic fabric comprising a. at least one unidirectionally elastic portion; b. said unidirectionally elastic portion comprising a ground stitch structure of chain stitch wales formed of nonelastomeric yarNs and non-elastomeric lateral running yarns laid into said stitch structure and interconnecting said wales; c. first elastomeric yarns laid in along the wales of said unidirectionally elastic portion; d. said first elastomeric yarns being laid in each of said wales; e. first elastomeric yarns, in the relaxed condition of the fabric, laying substantially in the wales in which they were laid; f. at least one bidirectionally elastic fabric portion integrally knitted together with said unidirectionally elastic portion; g. said bidirectionally elastic portion having a ground stitch structure of non-elastomeric yarns in which individual nonelastomeric yarns form stitches in more than one wale, laterally interconnecting said wales; h. the non-elastomeric yarns forming the ground stitch structure of the said unidirectionally elastic fabric portion being of at least about fifty percent higher denier and having a looser stitch construction than the non-elastomeric yarns forming the ground stitch structure of the said bidirectionally elastic portion; i. second elastomeric yarns, of lower denier than the first elastomeric yarns, laid in along the wales of the bidirectionally elastic portion under lower tension than said first elastomeric yarns; j. said second elastomeric yarns being laid in across a plurality of wales; k. said second elastomeric yarns, in the relaxed condition of the fabric, lying substantially in a single wale; l. the said lateral running yarns of said unidirectionally elastic portion extending across at least two stitches and being at least about twice the denier of the other nonelastomeric yarns of the fabric, to impart a substantial wall stiffness to said unidirectionally elastic portion.
Claim 3
Dependent Claim
39 words
A warp knit combination elastic fabric according to claim 1, further characterized by a. said fabric comprising, principally, a single body fabric portion of bidirectionally elastic fabric bounded on both lateral edges by selvedge portions of unidirectionally elastic fabric.
Claim 4
Dependent Claim
27 words
A warp knit combination elastic fabric according to claim 1, further characterized by a. said lateral running yarns being on the order of 200 denier or heavier.
Claim 5
Dependent Claim
79 words
A warp knit combination elastic fabric according to claim 1, further characterized by a. said fabric having a second selvedge formed of unidirectionally elastic fabric and intended to function as a leg band elastic; b. the ground stitch structure for said leg band elastic having a looser stitch construction than the ground stitch for said body fabric portion; and c. the ground stitch stitch structure of said waistband elastic having a looser stitch construction than said leg band elastic.
Claim 6
Dependent Claim
53 words
A warp knit combination elastic fabric according to claim 4, further characterized by a. said waistband elastic incorporating a plurality of laid-in plush yarns having extended floats along the interior fabric surface; b. said leg band elastic incorporating a plurality of laid-in bare rubber yarns having extended floats along the interior fabric surface.
Claim 7
Independent Claim
268 words
The method of constructing a warp knit combination elastic fabric having at least one bidirectionally elastic portion and at least one unidirectionally elastic portion, in which said portions have different degrees of elastic extensibility, and where the fabric lays substantially flat in its relaxed condition, which comprises a. knitting first non-elastomeric yarns to form a ground structure for said unidirectionally elastic portion comprising a plurality of adjacent wales of chain stitches; b. laterally interconnecting said warp rows by laying in, across two or more needle spaces, one or more lateral running second non-elastomeric yarns in the lateral courses of chain stitches; c. incorporating first elastomeric yarns in said wales of chain stitches by laying in said first elastomeric yarns in a single needle space; d. Knitting third non-elastomeric yarns to form a grOund structure for said bidirectionally elastic portion comprising a plurality of rows of ground stitches; e. said first non-elastomeric yarns being of at least about fifty percent higher denier than, and being knitted under lower yarn tension than the third non-elastomeric yarns forming the said ground structure of said bidirectionally elastic portion; f. said third non-elastomeric yarns being constructed to form stitches in a plurality of wales and thereby effecting lateral interconnection of adjacent wales; and g. incorporating second elastomeric yarns in said bidirectionally elastic portion by laying said elastomeric yarns into the last mentioned ground stitches across a plurality of needle spaces; h. said second elastomeric yarns being of lower weight than the first and being laid in under lower tension than the laying in of said first elastomeric yarns forming said unidirectionally elastic portion.
Claim 8
Independent Claim
268 words
The method of constructing a warp knit combination elastic fabric having at least one bidirectionally elastic portion and at least one unidirectionally elastic portion, in which said portions have different degrees of elastic extensibility, and where the fabric lays substantially flat in its relaxed condition, which comprises a. knitting first non-elastomeric yarns to form a ground structure for said unidirectionally elastic portion comprising a plurality of adjacent wales of chain stitches; b. laterally interconnecting said warp rows by laying in, across two or more needle spaces, one or more lateral running second non-elastomeric yarns in the lateral courses of chain stitches; c. incorporating first elastomeric yarns in said wales of chain stitches by laying in said first elastomeric yarns in a single needle space; d. Knitting third non-elastomeric yarns to form a grOund structure for said bidirectionally elastic portion comprising a plurality of rows of ground stitches; e. said first non-elastomeric yarns being of at least about fifty percent higher denier than, and being knitted under lower yarn tension than the third non-elastomeric yarns forming the said ground structure of said bidirectionally elastic portion; f. said third non-elastomeric yarns being constructed to form stitches in a plurality of wales and thereby effecting lateral interconnection of adjacent wales; and g. incorporating second elastomeric yarns in said bidirectionally elastic portion by laying said elastomeric yarns into the last mentioned ground stitches across a plurality of needle spaces; h. said second elastomeric yarns being of lower weight than the first and being laid in under lower tension than the laying in of said first elastomeric yarns forming said unidirectionally elastic portion.
Claim 9
Dependent Claim
100 words
The method of claim 6, wherein the combination elastic fabric has a bidirectionally elastic body portion and unidirectionally elastic selvedge portions along each side of said body portion forming, respectively, waistband and leg band elastics, characterized by a. knitting the ground stitches for the waistband elastic under lower yarn tension than the ground stitches for the leg band elastic; b. knitting the ground stitches for the leg band elastic under lower yarn tension than the ground stitches for the body fabric portion, and c. laying in the elastomeric yarns for the leg and waistband elastics under substantially equal yarn tension.
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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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |