US4522876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral textile composite fabric
Assignee: Lydall Inc
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Filing: 1984-07-05
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Granted: 1985-06-11
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Expires: 2004-07-05
Abstract
Abstract There is provided an integral textile composite fabric of non-woven, needled textile fibers which comprises at least one organic textile fiber layer of laid and needled textile organic fibers, at least one glass fiber layer of laid and needled glass fibers, and a plurality of needled stitches composed essentially of the organic fibers from the organic fiber layer needled in and disposed substantially through the glass fiber layer. The layers are bound together at their inner surfaces, are substantially non-detachable from each other and form an integral textile composite fabric having substantially uniform and high physical properties. There are at least 700 stitches per square inch passing through the glass fiber layer, and the organic fiber layer is essentially free, at least on the outer surface thereof, of glass fibers displaced from the glass fiber layer.
Inventors
- 👤 John J. Hiers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:04
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; B32B5/06; B32B5/022; D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; B32B2250/00; B32B2250/20; B32B2262/00; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/30; B32B2307/304; B32B2307/70; B32B2307/718; Y; Y10; Y10S; Y10S55/00; Y10S55/35; Y10T; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/666; Y10T442/667
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
183 words
An integral textile composite fabric of non-woven, needled textile fibers comprising: (a) at least one organic textile fiber layer of laid and needled textile organic fibers, said layer having an inner and an outer surface; (b) at least one glass fiber layer of laid and needled glass fibers, said layer having an inner and outer surface; (c) a plurality of first needled stitches composed essentially of said organic fibers from said one organic fiber layer needled in and disposed substantially through said one glass fiber layer while the fibers of the said glass fiber layer are substantially undisturbed, whereby the said stitches bind the said layers together at their inner surfaces, the said layers are substantially non-detachable from each other and form an integral textile composite fabric having substantially uniform and high physical properties, and wherein there are at least 700 stitches per square inch of said binding stitches passing through said one glass fiber layer and wherein said one organic fiber layer is essentially free, at least on the outer surface thereof, of glass fibers displaced from said one glass fiber layer.
Claim 2
Dependent Claim
183 words
An integral textile composite fabric of non-woven, needled textile fibers comprising: (a) at least one organic textile fiber layer of laid and needled textile organic fibers, said layer having an inner and an outer surface; (b) at least one glass fiber layer of laid and needled glass fibers, said layer having an inner and outer surface; (c) a plurality of first needled stitches composed essentially of said organic fibers from said one organic fiber layer needled in and disposed substantially through said one glass fiber layer while the fibers of the said glass fiber layer are substantially undisturbed, whereby the said stitches bind the said layers together at their inner surfaces, the said layers are substantially non-detachable from each other and form an integral textile composite fabric having substantially uniform and high physical properties, and wherein there are at least 700 stitches per square inch of said binding stitches passing through said one glass fiber layer and wherein said one organic fiber layer is essentially free, at least on the outer surface thereof, of glass fibers displaced from said one glass fiber layer.
Claim 3
Dependent Claim
74 words
The fabric of claim 1 wherein an additional organic fiber layer of needled textile organic fibers having an inner and an outer surface is disposed with its inner surface adjacent the said outer surface of said one glass fiber layer, and the said stitches are also so disposed in said additional organic fiber layer so that said additional organic fiber layer is likewise bound to the outer surface of said one glass fiber layer.
Claim 4
Dependent Claim
160 words
The fabric of claim 2 where a plurality of additional stitches composed essentially of organic fibers from said additional organic fiber layer are needled in and disposed substantially through said one glass fiber layer so that said additional organic fiber layer is bound to said one glass fiber layer at the said outer surface of the said one glass fiber layer and said inner surface of said additional organic fiber layer, the said one glass fiber layer and the said additional fiber layer being substantially non-detachable from each other and form an integral textile composite with all of said layers having substantially uniform and high physical properties, and wherein said additional stitches constitute at least a significant portion of the said 700 stitches per square inches passing through said one glass fiber layer, and wherein said additional organic fiber layer is essentially free, at least on the outer surface thereof, of glass fibers displaced from said one glass fiber layer.
Claim 5
Dependent Claim
34 words
The fabric of claim 3 wherein the said first stiches pass at least substantially through said additional organic fiber layer and said additional stitches pass at least substantially through said one organic fiber layer.
Claim 6
Dependent Claim
40 words
The fabric of claim 1 wherein one or more further layers of glass fibers and/or organic fibers are disposed adjacent to the outer surface of the one glass fiber layer and said further layers likewise have said stitches passing therethrough.
Claim 7
Dependent Claim
38 words
The fabric of claim 2 wherein one or more further layers of glass fibers and/or organic fiber are disposed between said one organic fiber layer and said additional organic fiber layer and likewise have said stitches passing therethrough.
Claim 8
Dependent Claim
14 words
The fabric of claim 1 wherein the amount of stitches is at least 1000.
Claim 9
Dependent Claim
14 words
The fabric of claim 2 wherein the amount of stitches is at least 1000.
Claim 10
Dependent Claim
14 words
The fabric of claim 3 wherein the amount of stitches is at least 1000.
Claim 11
Dependent Claim
11 words
The fabric of claim 1 in the form of a filter.
Claim 12
Dependent Claim
19 words
The fabric of claim 10 wherein the weight ratio of organic fiber to glass fiber is 4:1 to 12:1.
Claim 13
Dependent Claim
13 words
The fabric of claim 11 in the form of a bag house filter.
Claim 14
Dependent Claim
11 words
The fabric of claim 1 in the form of an insulator.
Claim 15
Dependent Claim
19 words
The fabric of claim 13 wherein the weight ratio of organic fiber to glass fiber is 1:4 to 1:10.
Claim 16
Dependent Claim
12 words
The fabric of claim 14 in the form of a heat insulator.
Claim 17
Dependent Claim
19 words
The fabric of claim 10 wherein the weight ratio of organic fibers to glass fibers is 5:1 to 3:1.
Claim 18
Dependent Claim
12 words
The fabric of claim 16 in the form of a breathing filter.
Claim 19
Dependent Claim
25 words
The fabric of claim 1 which has one or more of a coating thereon, a sizing thereon, a filler therein and an impregnating resin therein.
Claim 20
Dependent Claim
10 words
The fabric of claim 1 attached to a carrier fabric.
Claim 21
Dependent Claim
9 words
The fabric of claim 1 having a surface finish.
Claim 22
Dependent Claim
145 words
A process for the production of the fabric of claim 1, comprising: (1) preparing a laid glass fiber batt of said glass fibers; (2) preparing a laid organic fiber batt of said organic fibers; (3) placing the said batts adjacent to each other to form a composite batt; (4) needling said composite batt at least from the organic fiber layer with at least 700 needle punches per square inch whereby stitches composed essentially of said organic fibers from said organic fiber layer are needled in and disposed substantially through said glass fiber layer while the fibers of the said glass fiber layer are substantially undisturbed, whereby the said stitches bind the said layers together at their inner surfaces; and wherein said needling is such that the organic fiber layer is needled and entangled into a strong layer but said glass fiber layer is substantially undisturbed.
Claim 23
Dependent Claim
14 words
The process of claim 21 wherein there are more than one organic fiber layers.
Claim 24
Dependent Claim
15 words
The process of claim 22 wherein the organic fiber layers sandwich the glass fiber layer.
Claim 25
Dependent Claim
14 words
The process of claim 23 wherein there are more than one glass fiber layer.
Claim 26
Dependent Claim
24 words
The process of claim 21 wherein the aggressiveness of the needling is such that said glass fiber layer is substantially undisturbed during said needling.
Claim 27
Dependent Claim
33 words
The process of claim 25 wherein the aggressiveness of the needling is provided by one of more of the needle barb size, depth, configuration and penetration and organic fiber length, denier and composition.
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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) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |