US4499134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion and high temperature resistant composite and method of making the same
Assignee: Lydall Inc
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Filing: 1983-10-24
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Granted: 1985-02-12
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Expires: 2003-10-24
Abstract
Abstract There is provided a composite having improved structural integrity and suitable for use in abrasive, high temperature environments. The composite comprises randomly laid and oriented heat resistant fibers interlocked together into the form of a shape sustaining paper having two lateral surfaces. The paper has a thickness of from about 0.01 to 0.50 inch. An abrasion-resistant, high temperature resistant scrim is disposed upon at least one of the lateral surfaces of the paper, and a network of abrasion-resistant, high temperature-resistant threads is stitched through the scrim and the paper such that the scrim is mechanically locked to the paper by said threads. The network of threads and the scrim substantially retain the structural integrity of the said paper in use in the abrasive, high temperature environments.
Inventors
- 👤 Elliot F. Whitely
- 👤 Richard A. Devoe
- 👤 Gerald W. Gadbois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:22
CPC Classifications
B; B32; B32B; B32B29/00; B32B29/02; B32B5/00; B32B5/02; B32B5/06; B32B5/022; B32B5/024; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4218; D04H1/70; D04H1/72; D04H5/00; D04H5/02; B32B2262/00; B32B2262/10; B32B2262/101; B32B2262/105; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/50; B32B2307/514; B32B2307/554; B32B2307/70; B32B2307/718; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24033; Y10T428/24058; Y10T428/24074; Y10T428/24091; Y10T428/24099; Y10T428/24107; Y10T428/27; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/133; Y10T442/143; Y10T442/184; Y10T442/197
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
145 words
A composite having improved structural integrity and suitable for use in abrasive, high temperature environments, comprising: (1) randomly laid and oriented heat resistant fibers interlocked together into the form of a shape sustaining paper having two lateral surfaces, said paper having a thickness of from about 0.01 to 0.50 inch. (2) an abrasion-resistant, high temperature resistant, flexible, woven or non-woven scrim having a weight of from 0.5 to 10 oz./yd 2 disposed upon at least one of the lateral surfaces of the said paper; and (3) a network of abrasion-resistant, high temperature-resistant threads stitched through said scrim and said paper in the form of stitching lines of a repeating enclosed pattern such that said scrim is mechanically locked to said paper by said threads; whereby, the said network of threads and said scrim substantially retain the structural integrity of the said paper under abrasion conditions.
Claim 2
Dependent Claim
145 words
A composite having improved structural integrity and suitable for use in abrasive, high temperature environments, comprising: (1) randomly laid and oriented heat resistant fibers interlocked together into the form of a shape sustaining paper having two lateral surfaces, said paper having a thickness of from about 0.01 to 0.50 inch. (2) an abrasion-resistant, high temperature resistant, flexible, woven or non-woven scrim having a weight of from 0.5 to 10 oz./yd 2 disposed upon at least one of the lateral surfaces of the said paper; and (3) a network of abrasion-resistant, high temperature-resistant threads stitched through said scrim and said paper in the form of stitching lines of a repeating enclosed pattern such that said scrim is mechanically locked to said paper by said threads; whereby, the said network of threads and said scrim substantially retain the structural integrity of the said paper under abrasion conditions.
Claim 3
Dependent Claim
19 words
The composite of claim 1 wherein the fibers of the paper, scrim and threads are made of inorganic fiber.
Claim 4
Dependent Claim
25 words
The composite of claim 2 wherein the fibers of the scrim and threads are glass fibers and the fibers of the paper are ceramic fibers.
Claim 5
Dependent Claim
18 words
The composite of claim 1 wherein the thickness of the paper is from 0.10 inch to 0.30 inch.
Claim 6
Dependent Claim
13 words
The composite of claim 1 wherein the paper has a binder disposed therein.
Claim 7
Dependent Claim
30 words
The composite of claim 5 wherein the binder is an organic polymeric binder and the polymer is selected from the group consisting of polyvinylchloride, polyvinyl-acetate/alcohol, phenolic, acrylic and epoxy polymers.
Claim 8
Dependent Claim
18 words
The composite of claim 6 wherein the add-on of binder to the paper is from 1% to 20%.
Claim 9
Dependent Claim
17 words
The composite of claim 1 wherein a scrim is disposed on both lateral surfaces of said paper.
Claim 10
Dependent Claim
16 words
The composite of claim 1 wherein the configuration is patterned and the stitching is by sewing.
Claim 11
Dependent Claim
13 words
The composite of claim 9 wherein the pattern is a repeating quilting pattern.
Claim 12
Dependent Claim
17 words
The composite of claim 10 wherein the pattern of the quilting repeats at least every four inches.
Claim 13
Dependent Claim
14 words
The composite of claim 11 wherein the pattern repeats at least every two inches.
Claim 14
Dependent Claim
16 words
The composite of claim 1 in the configuration of a back-up insulator for a rotary kiln.
Claim 15
Dependent Claim
11 words
The composite of claim 1 in the configuration of a filter.
Claim 16
Dependent Claim
12 words
The composite of claim 14 wherein the filter is a bag filter.
Claim 17
Dependent Claim
14 words
The composite of claim 1 is the configuration of an electrical cable tray liner.
Claim 18
Dependent Claim
98 words
A method for producing the composite of claim 1, comprising: (1) laying heat resistant fibers into a laid matt; (2) consolidating the laid matt into a paper of about 0.01 to 0.50 inch thick and having two lateral surfaces; (3) applying an abrasion-resistant, high temperature resistant, flexible, woven or non-woven scrim having a weight of from 0.5 to 10 oz./yd 2 to at least one lateral surface of the paper; and (4) stitching the scrim to the paper with a network of abrasion-resistant, high temperature resistant threads in the form of stitching lines of a repeating enclosed pattern.
Claim 19
Dependent Claim
19 words
The method of claim 17 wherein the fibers of the paper scrim and threads are made of inorganic fibers.
Claim 20
Dependent Claim
17 words
The method of claim 17 wherein a scrim is applied to both lateral surfaces of the paper.
Claim 21
Dependent Claim
11 words
The method of claim 17 wherein the stitching is by sewing.
Claim 22
Dependent Claim
13 words
The method of claim 17 wherein the pattern is a repeating quilting pattern.
Claim 23
Dependent Claim
17 words
The method of claim 21 wherein the pattern of the quilting repeats at least every four inches.
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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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |