US4731283A
Expired / Lapsed
US
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Waterproof cloth and process for production thereof
Assignee: IST Corp Japan
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Filing: 1986-10-06
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Granted: 1988-03-15
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Expires: 2006-10-06
Abstract
Abstract A waterproof cloth comprising a base cloth made of heat-resistant fibers having a fluorine resin adhering to their surface and a film of a fluorine resin fused integrally to at least one surface of the base cloth. The waterproof cloth can be produced by laying the film on the base cloth and heating them under pressure.
Inventors
- 👤 Isamu Sakane
- 👤 Satuski Kawauchi
- 👤 Tsuneo Gemba
- 👤 Minoru Maekawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:29
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/04; D06N3/047; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/244; D06M15/256; D06N7/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/30; Y10T442/3179; Y10T442/3301; Y10T442/3309; Y10T442/3854; Y10T442/3878; Y10T442/40; Y10T442/419
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
63 words
A waterproof cloth comprising (1) a base cloth woven or knitted from treated yarns formed by impregnating yarns of heat-resistant fibers with a dispersion of fluorine resin, drying the impregnating yarns, and sintering the dryed yarns to adhere fluorine resin to the surfaces thereof and (2) a film of a fluorine resin fused integrally to at least one surface of the base cloth.
Claim 2
Dependent Claim
63 words
A waterproof cloth comprising (1) a base cloth woven or knitted from treated yarns formed by impregnating yarns of heat-resistant fibers with a dispersion of fluorine resin, drying the impregnating yarns, and sintering the dryed yarns to adhere fluorine resin to the surfaces thereof and (2) a film of a fluorine resin fused integrally to at least one surface of the base cloth.
Claim 3
Dependent Claim
25 words
The waterproof cloth of claim 1 wherein the base cloth is woven or knitted from yarns of the heat-resistant fibers coated with the fluorine resin.
Claim 4
Dependent Claim
13 words
The waterproof cloth of claim 1 wherein the heat-resistant fibers are glass fibers.
Claim 5
Dependent Claim
15 words
The waterproof cloth of claim 2 wherein the yarns are multifilament yarns of glass fibers.
Claim 6
Dependent Claim
22 words
The waterproof cloth of claim 3 wherein the amount of the fluorine resin adhering to the glass fibers is 5 to 40%.
Claim 7
Dependent Claim
35 words
The waterproof cloth of claim 1 wherein the fluorine resin is at least one resin selected from the group consisting of di-fluoroethylene resin, trifluoroethylene resin, tetrafluoroethylene resin, 4,6-fluoroethylene resin and tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer resins.
Claim 8
Dependent Claim
43 words
The waterproof cloth of claim 1 wherein a film of tetrafluoroethylene resin is fused to one surface of the base cloth, and a film of a 4,6-fluoroethylene resin or a tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer resin, to the other surface of the base cloth.
Claim 9
Dependent Claim
19 words
The waterproof cloth of claim 3 wherein the proportion of the glass fibers is at least 40% by weight.
Claim 10
Dependent Claim
84 words
A process for producing a waterproof cloth, which comprises impregnating yarns of heat-resistant fibers with a dispersion of a fluorine resin, drying the impregnated yarns and sintering them to form yarns having the fluorine resin adhering to their surface, weaving or knitting a base cloth from the resulting yarns, laying a film of a fluorine resin on one or both surfaces of the base cloth, and heating the assembly under pressure to fuse the film to one or both surfaces of the base cloth.
Claim 11
Dependent Claim
84 words
A process for producing a waterproof cloth, which comprises impregnating yarns of heat-resistant fibers with a dispersion of a fluorine resin, drying the impregnated yarns and sintering them to form yarns having the fluorine resin adhering to their surface, weaving or knitting a base cloth from the resulting yarns, laying a film of a fluorine resin on one or both surfaces of the base cloth, and heating the assembly under pressure to fuse the film to one or both surfaces of the base cloth.
Claim 12
Dependent Claim
12 words
The process of claim 9 wherein the heat-resistant fibers are glass fibers.
Claim 13
Dependent Claim
14 words
The process of claim 10 wherein the yarns are multifilament yarns of glass fibers.
Claim 14
Dependent Claim
34 words
The process of claim 9 wherein the fluorine resin is at least one resin selected from the group consisting of difluoroethylene resin, trifluoroethylene resin, tetrafluoroethylene ressin 4,6-fluoroethylene resin and tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer resins.
Claim 15
Dependent Claim
42 words
The process of claim 9 wherein a film of tetrafluoroethylene resin is fused to one surface of the base cloth, and a film of a 4,6-fluoroethylene resin or a tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer resin, to the other surface of the base cloth.
Claim 16
Dependent Claim
22 words
The waterproof cloth of claim 4 wherein the amount of the fluorine resin adhering to the glass fibers is 5 to 40%.
Claim 17
Dependent Claim
19 words
The waterproof cloth of claim 4 wherein the proportion of the glass fibers is at least 40% by weight.
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) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |