US4970109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knitted barrier fabric
Assignee: CONDUCTEX Inc A NC CORP
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Filing: 1989-05-05
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Granted: 1990-11-13
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Expires: 2009-05-05
Abstract
Abstract A launderable cloth-like product and a method for making same are provided wherein such product is a readily manufactured knitted fabric comprised of non-conductive yarn fibers that form a combined stitch construction providing a matrix that is liquid impermeable while remaining relatively gas permeable. In a preferred embodiment the present invention comprises nonconductive and conductive yarn fibers that form overlaps and underlaps to such an extent so as to form a combined stitch construction providing a matrix that is resistant to the build-up of a static charge, and the resulting grid pattern results in increased tear-resistance.
Inventors
- 👤 Kenneth G. Bryant
- 👤 Billy Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:47
CPC Classifications
D; D04; D04B; D04B21/00; D04B21/14; D04B21/16; H; H05; H05F; H05F3/00; H05F3/02; D10; D10B; D10B2401/00; D10B2401/16; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T442/00; Y10T442/40; Y10T442/425; Y10T442/438
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
A knitted barrier fabric comprised of a knit structure of fiber stitches forming courses and wales, said fibers being heat set in a dense construction and treated with a hydrophobic finish so that the fabric is substantially impermeable to liquid and gas permeable, and wherein the knit structure is comprised of stitches of nonconductive fibers knitted together with stitches of conductive fibers so as to form an electrically conductive matrix capable of dissipating a static charge in substantially any direction along the course and wale of the fabric.
Claim 2
Dependent Claim
88 words
A knitted barrier fabric comprised of a knit structure of fiber stitches forming courses and wales, said fibers being heat set in a dense construction and treated with a hydrophobic finish so that the fabric is substantially impermeable to liquid and gas permeable, and wherein the knit structure is comprised of stitches of nonconductive fibers knitted together with stitches of conductive fibers so as to form an electrically conductive matrix capable of dissipating a static charge in substantially any direction along the course and wale of the fabric.
Claim 3
Dependent Claim
37 words
The knitted barrier fabric of claim 1 wherein the conductive fibers are chosen from the group consisting of carbon suffused nylon; filamentary polymer substrates having finely divided, electrically-conductive particles embossed on the fiber surface; and graphite fibers.
Claim 4
Dependent Claim
20 words
The knitted barrier fabric of claim 1 wherein the conductive fibers consist of two or more conductive yarns plied together.
Claim 5
Dependent Claim
22 words
The knitted barrier fabric of claim 1 wherein the conductive fibers consist of a conductive yarn plied together with a nonconductive yarn.
Claim 6
Dependent Claim
266 words
A knitted barrier fabric fabricated by threading full the bottom bar of a three bar warp knit machine with 70/48 S.D. polyester stiched in the following sequence: 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5; the middle bar of the machine threaded 1 in 6 out with a 40 denier polyester and 21/denier carbon suffused nylon thread and stitched in the following sequence: 2-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 7-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9 with an intermediate let off set up for the middle bar on a ration of 1.21 with a chain sequence as follows: 0-0, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 0-0, 0-0, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3 3-3, 0-0 with a top thread 1 end out and 6 ends in with 40 denier polyester and stitched in the following sequence: 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2; said knitted structure being heat set in a dense construction; and treating said knitted structure with a hydrophobic finish so that the fabric is capable of sustantially dissipating an electric charge and is substantially impermeable to liquid and gas permeable.
Claim 7
Dependent Claim
266 words
A knitted barrier fabric fabricated by threading full the bottom bar of a three bar warp knit machine with 70/48 S.D. polyester stiched in the following sequence: 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5; the middle bar of the machine threaded 1 in 6 out with a 40 denier polyester and 21/denier carbon suffused nylon thread and stitched in the following sequence: 2-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 7-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9 with an intermediate let off set up for the middle bar on a ration of 1.21 with a chain sequence as follows: 0-0, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 0-0, 0-0, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3 3-3, 0-0 with a top thread 1 end out and 6 ends in with 40 denier polyester and stitched in the following sequence: 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2; said knitted structure being heat set in a dense construction; and treating said knitted structure with a hydrophobic finish so that the fabric is capable of sustantially dissipating an electric charge and is substantially impermeable to liquid and gas permeable.
Claim 8
Dependent Claim
135 words
A knitted barrier fabric fabricated by threading full the bottom bar of a warp knit machine with 70/48 S.D. polyester stitched in the following sequence: 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5 threading the top bar full with 40 denier polyester and stiched in the following sequence: 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2; said knitted structure being heat set in a dense construction; and treating said knitted structure with a hydrophobic finish so that the fabric is substantially impermeable to liquid and gas permeable.
Claim 9
Dependent Claim
135 words
A knitted barrier fabric fabricated by threading full the bottom bar of a warp knit machine with 70/48 S.D. polyester stitched in the following sequence: 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5 threading the top bar full with 40 denier polyester and stiched in the following sequence: 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2; said knitted structure being heat set in a dense construction; and treating said knitted structure with a hydrophobic finish so that the fabric is substantially impermeable to liquid and gas permeable.
Claim 10
Dependent Claim
270 words
A process for making a knitted barrier fabric comprising the steps of: threading full the bottom bar of a warp knit machine with 70/48 S.D. polyester stitched in the following sequence: 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5; threading the middle bar of the machine threaded 1in 6 out with a 40denier polyester and 21/denier carbon suffused nylon thread and stiched in the following sequence: 2-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 7-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9 with an intermediate let off set up for the middle bar on a ration of 1.21 with a chain sequence as follows: 0-0, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 0-0, 0-0, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3 3-3, 0-0 with a top bar thread 1 end out and 6 ends in with 40 denier polyester and stitched in the following sequence: 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2; heat setting said knitted structure in a dense construction; and treating said heat set structure with a hydrophobic finish so that the fabric is capable of sustantially dissipating an electric charge and is substantially impermeable to liquid and gas permeable.
Claim 11
Dependent Claim
270 words
A process for making a knitted barrier fabric comprising the steps of: threading full the bottom bar of a warp knit machine with 70/48 S.D. polyester stitched in the following sequence: 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5, 1-0, 4-5; threading the middle bar of the machine threaded 1in 6 out with a 40denier polyester and 21/denier carbon suffused nylon thread and stiched in the following sequence: 2-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 7-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9, 8-7, 8-9 with an intermediate let off set up for the middle bar on a ration of 1.21 with a chain sequence as follows: 0-0, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 0-0, 0-0, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3, 3-3 3-3, 0-0 with a top bar thread 1 end out and 6 ends in with 40 denier polyester and stitched in the following sequence: 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2, 1-0, 1-2; heat setting said knitted structure in a dense construction; and treating said heat set structure with a hydrophobic finish so that the fabric is capable of sustantially dissipating an electric charge and is substantially impermeable to liquid and gas permeable.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |