US3673295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for shaping textile articles using fluid thermoforming techniques
Assignee: Honeywell International Inc
•
Filing: 1970-10-30
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Granted: 1972-06-27
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Expires: 1990-10-30
Abstract
Abstract Articles are manufactured from textile material composed of filaments prepared from blended fiber-forming polymers having different chemical properties, at least one of the fiber-forming polymers being dispersed as fibrils in a lower melting point polymeric matrix. The article is produced by heating the material to a temperature above the melting point of the matrix-forming polymer but below the melting point of the dispersed fibrils to shrink said article thereby decreasing the porosity thereof and afterwards forming the heated material into a three-dimensional shape using vacuum or other fluid pressure.
Inventors
- 👤 Robert Charles Winchklhofer
- 👤 Gene Clyde Weedon
- 👤 George Howard Collingwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:50
CPC Classifications
D; D06; D06C; D06C29/00; B; B29; B29C; B29C51/00; B29C51/002; B29C51/004; B29C2791/00; B29C2791/004; B29C2791/006; B29C2791/007; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/31504; Y10T428/31725; Y10T428/31736; Y10T428/31786; Y10T442/00; Y10T442/60; Y10T442/69
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
54 words
A process as described in claim 1 wherein the layer of textile material is cooled after the heating step so that a heat-stabilized intermediate product of reduced porosity is achieved and then reheating said material to a temperature below the melting temperature of the dispersed component just prior to applying the differential fluid pressure.
Claim 2
Dependent Claim
31 words
A process as described in claim 1 wherein the matrix is composed of greater than 50 parts by weight polyamide and the dispersed component is composed of discontinuous fibrils of polyester.
Claim 3
Dependent Claim
18 words
A process as described in claim 3 wherein the polyamide is polycaproamide and the polyester is polyethylene terephthalate.
Claim 4
Dependent Claim
21 words
A process as described in claim 3 wherein the said material is heated to about 200* C. to about 250* C.
Claim 5
Dependent Claim
38 words
A process as described in claim 5 wherein the porosity of the starting material is reduced from an air permeability rate of about 15 cubic feet per minute per foot square to about 5 by said heat treating.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |