US4025684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular fabric coated with plastics or synthetic rubbers
Assignee: Individual
•
Filing: 1975-05-27
•
Granted: 1977-05-24
•
Expires: 1995-05-27
Abstract
Abstract The disclosure embraces an inflatable flat tubular fabric which is coated on its outside surfaces with synthetic rubber or plastic and is constructed by weaving the fabric in tubular form with basic threads having a given tensile strength with the two layers of the fabric being joined together by auxiliary threads which have a substantially lower tensile strength than the basic threads so that, when the fabric is inflated, the auxiliary threads will be broken to permit expansion of the fabric to its full volume capacity.
Inventors
- 👤 Helmut Neidhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/08; A47C27/081; D; D03; D03D; D03D1/00; D03D1/0035; D03D1/0043; D03D1/02; D03D11/00; D03D11/02; D03D3/00; D03D3/02; F; F16; F16L; F16L11/00; F16L11/02; D10; D10B; D10B2403/00; D10B2403/02; D10B2403/021; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T442/00; Y10T442/30; Y10T442/3179; Y10T442/3195; Y10T442/3203; Y10T442/3211
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
157 words
In a flat, tubular fabric which is coated on both outside surfaces with a material that is substantially impervious to the passage of fluid therethrough, said flat fabric being woven in both the warp and weft directions with basic fibers to have two layers, said layers having, in the flat condition, side edges which are connected together so that said fabric is inflatable to include at least one hollow space, the improvement comprising said fabric including auxiliary threads, said auxiliary threads binding said two layers together in a close, tight woven formation extending over the total area of said fabric with the two layers fastened tightly and closely together to substantially temporarily prevent relative lateral movement between said two layers, said auxiliary threads having a tensile strength that is substantially lower than the tensile strength of said basic fibers so that, when said fabric is inflated to assume said tubular shape, said auxiliary threads will be broken.
Claim 2
Dependent Claim
157 words
In a flat, tubular fabric which is coated on both outside surfaces with a material that is substantially impervious to the passage of fluid therethrough, said flat fabric being woven in both the warp and weft directions with basic fibers to have two layers, said layers having, in the flat condition, side edges which are connected together so that said fabric is inflatable to include at least one hollow space, the improvement comprising said fabric including auxiliary threads, said auxiliary threads binding said two layers together in a close, tight woven formation extending over the total area of said fabric with the two layers fastened tightly and closely together to substantially temporarily prevent relative lateral movement between said two layers, said auxiliary threads having a tensile strength that is substantially lower than the tensile strength of said basic fibers so that, when said fabric is inflated to assume said tubular shape, said auxiliary threads will be broken.
Claim 3
Dependent Claim
58 words
The flat tubular fabric as claimed in claim 1 wherein said fabric comprises distance fibers woven into and extending between said two layers, said distance fibers permanently linking said two layers together at spaced apart points, said distance fibers determining the distance between said two layers when said two layers are separated by inflation of said tubular fabric.
Claim 4
Dependent Claim
23 words
A flat tubular fabric according to claim 1 wherein said auxiliary threads have said low tensile strength as a result of solvent treatment.
Claim 5
Dependent Claim
27 words
A flat tubular fabric according to claim 1 wherein said auxiliary threads are spaced at a distance of about 10-50 mm over the area of the fabric.
Claim 6
Dependent Claim
48 words
A flat tubular fabric according to claim 1 wherein the fabric comprises said basic fibers, connecting fibers permanently connecting predetermined parts of the areas of one of the two layers to the corresponding parts of the other of the two layers of the flat tubular fabric closely together.
Claim 7
Dependent Claim
27 words
A flat tubular fabric according to claim 2 also including other predetermined areas of the two layers which are permanently joined closely and tightly by connecting fibers.
Claim 8
Dependent Claim
20 words
A flat tubular fabric according to claim 1 wherein the basic fibers are at least mainly made of synthetic filaments.
Claim 9
Dependent Claim
27 words
A flat tubular fabric according to claim 1 wherein said auxiliary threads have said low tensile strength as a result of the application of heat applied thereto.
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US2435543A
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US2657716A
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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) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |