Patent US3770539A successfully refreshed from Google Patents.
US3770539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing resin-filament composites
Assignee: Hercules LLC
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Filing: 1969-08-11
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Granted: 1973-11-06
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Expires: 1989-08-11
Abstract
Abstract An improvement is provided in process for manufacture of resinfilament composites from one or more filamentary strands, which comprises impregnating the strand(s) with a solvent for the resin, thereafter laying out the solvent-impregnated strand on a film of the resin, and then removing the solvent to provide residual composite as product. Product, so produced, is also provided. Further, a system is provided for manufacture of the composite product, including mandrel winding means, a filament strand supply means, and means intermediate the filament strand supply and the mandrel for contacting the strand with solvent for the solvent-impregnation.
Inventors
- 👤 F Bullock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:05
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; D; D04; D04H; D04H3/00; D04H3/08; D04H3/12; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
75 words
In the manufacture of broad goods, or tape, by winding at least one strand of filaments onto a mandrel in contact with a resin supported on said mandrel, the improvement comprising impregnating said strand(s) with a solvent for said resin and then winding the resulting solvent-impregnated strand(s) onto a film of said resin supported as described, and thereafter removing said solvent from the resulting winding to form said broad goods, or tape, as residual product.
Claim 2
Dependent Claim
21 words
In a process of claim 2, dissolving in said solvent from about 65-95 weight percent of said resin during said winding.
Claim 3
Dependent Claim
15 words
A process of claim 2 wherein said strand(s) is a bundle of high modulus filaments.
Claim 4
Dependent Claim
13 words
A process of claim 4 wherein said resin is of the epoxy type.
Claim 5
Dependent Claim
25 words
A process of claim 4 wherein said solvent is at least one selected from the group consisting of methyl ethyl ketone, toluene, acetone, and ethanol.
Claim 6
Dependent Claim
67 words
In a process of claim 6, drawing a strand(s) of from about 1, 400 to 10,000 graphite filaments through a body of said solvent and then onto said resin film when formed from 0.015 to 0.040 pounds per square foot of an epoxy type resin, at a rate of from about 20 to 200 feet per minute, and under a tension of from 10 to 1,000 grams.
Claim 7
Dependent Claim
14 words
A process of claim 4 wherein said strand(s) is a bundle of carbon filaments.
Claim 8
Dependent Claim
14 words
A process of claim 8 wherein said strand(s) is a bundle of graphite filaments.
Claim 9
Dependent Claim
28 words
In a process of claim 9, extending said strand(s) under tension, from a supply source therefor through a body of said solvent and then onto said resin film.
Claim 10
Dependent Claim
11 words
A process of claim 10 wherein said strand(s) is a yarn.
Claim 11
Dependent Claim
13 words
A process of claim 10 wherein said strand(s) is a tow, or roving.
Claim 12
Dependent Claim
14 words
In a process of claim 10, level winding said strand(s) onto said resin film.
Claim 13
Dependent Claim
29 words
In a process of claim 13, supporting resulting broad goods, or tape, product under elevated temperature and pressure conditions for a sufficient period of time to increase tack thereof.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |