US4638648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Layered warp knits
Assignee: Invista North America LLC
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Filing: 1986-05-01
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Granted: 1987-01-27
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Expires: 2006-05-01
Abstract
Abstract Warp knit technology is applied to produce a multi-layered fabric using a four bar stitch construction with spandex yarn in the last guide bar with knit or laid in stitch.
Inventors
- 👤 Bharat J. Gajjar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:39
CPC Classifications
D; D04; D04B; D04B21/00; D04B21/14; D04B21/18; D10; D10B; D10B2403/00; D10B2403/01; D10B2403/011; D10B2403/0114; D10B2501/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
152 words
In a knitted fabric that includes four ( 4) sets of threads knitted in a stitch pattern from first, second, third and fourth guide bars of a warp knitting machine forming spaced wales of knitted loops, the improvement comprising: (a) first guide bar threads of continuous filament yarn partially threaded in the first guide bar with at least one end in and one end out and using a knit-in stitch pattern; (b) second guide bar threads of a yarn having a denier at least twice that of the first guide bar yarn partially threaded in said second guide bar to duplicate the threading of the first guide bar and laid-in; (c) third guide bar threads of continuous filament yarn fully threaded in said third guide bar using a knit-in stitch pattern; and (d) fourth guide bar threads of elastomeric yarn fully threaded in said fourth guide bar using a knit-in stitch pattern.
Claim 2
Dependent Claim
152 words
In a knitted fabric that includes four ( 4) sets of threads knitted in a stitch pattern from first, second, third and fourth guide bars of a warp knitting machine forming spaced wales of knitted loops, the improvement comprising: (a) first guide bar threads of continuous filament yarn partially threaded in the first guide bar with at least one end in and one end out and using a knit-in stitch pattern; (b) second guide bar threads of a yarn having a denier at least twice that of the first guide bar yarn partially threaded in said second guide bar to duplicate the threading of the first guide bar and laid-in; (c) third guide bar threads of continuous filament yarn fully threaded in said third guide bar using a knit-in stitch pattern; and (d) fourth guide bar threads of elastomeric yarn fully threaded in said fourth guide bar using a knit-in stitch pattern.
Claim 3
Dependent Claim
80 words
The knitted fabric of claim 1, said first guide bar threads being knit with a (1-0, 0-1) stitch pattern, second guide bar threads being laid in with a (0-0, 5-5) stitch pattern, said third guide bar threads being knit with a (2-3, 1-0) stitch pattern and said fourth guide bar threads being knit with a (1-0, 1-2) stitch pattern with said partially threaded guide bars having 2 ends in and 2 ends out, the remaining guide bars being fully threaded.
Claim 4
Dependent Claim
81 words
The knitted fabric of claim 1, said first guide bar threads being knit with a (0-1, 1-2, 2-3, 2-1) stitch pattern, said second guide bar threads being knit with a (0-0, 6-6, 2-2, 6-6) stitch pattern, said third guide bar threads being knit with a (2-3, 1-0) stitch pattern, said fourth guide bar threads being knit with a (1-0, 1-2) stitch pattern with said partially threaded guide bars having 2ends in and 2ends out, the remaining guide bars being fully threaded.
Claim 5
Dependent Claim
13 words
The knitted fabric of claim 1, said second guide bar yarn being hydrophilic.
Claim 6
Dependent Claim
34 words
The knitted fabric of claim 1, the first guide bar knitted with a chain stitch, said third guide bar knitted with a float stitch and said fourth guide bar knitted with a float stitch.
Claim 7
Dependent Claim
35 words
The knitted fabric of claim 1, the first guide bar knitted with a chain stitch, the third guide bar knitted with a float stitch, and said fourth guide bar knitted with a laid in stitch.
Claim 8
Dependent Claim
150 words
In a knitted fabric that includes four (4) sets of threads knitted in a stitch pattern from first, second, third and fourth guide bars of a warp knitting machine forming spaced wales of knitted loops, the improvement comprising: (a) first guide bar threads of continuous filament yarn partially threaded in the first guide bar with at least one end in and one end out and using a knit-in stitch pattern; (b) second guide bar threads of a yarn having a denier at twice that of the first guide bar yarn partially threaded in said second guide bar to duplicate the threading of the first guide bar and laid-in; (c) third guide bar threads of elastomeric yarn fully threaded in said third guide bar using a knit-in stitch pattern; and (d) fourth guide bar threads of continuous filament yarn fully threaded in said fourth guide bar using a knit-in stitch pattern.
Claim 9
Dependent Claim
150 words
In a knitted fabric that includes four (4) sets of threads knitted in a stitch pattern from first, second, third and fourth guide bars of a warp knitting machine forming spaced wales of knitted loops, the improvement comprising: (a) first guide bar threads of continuous filament yarn partially threaded in the first guide bar with at least one end in and one end out and using a knit-in stitch pattern; (b) second guide bar threads of a yarn having a denier at twice that of the first guide bar yarn partially threaded in said second guide bar to duplicate the threading of the first guide bar and laid-in; (c) third guide bar threads of elastomeric yarn fully threaded in said third guide bar using a knit-in stitch pattern; and (d) fourth guide bar threads of continuous filament yarn fully threaded in said fourth guide bar using a knit-in stitch pattern.
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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) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |