Patent US3653174A successfully refreshed from Google Patents.
US3653174A
Expired / Lapsed
US
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Method and apparatus for impregnating fabrics, more particularly glass cloths, with plastics
Assignee: SUD AVIAT SOC NATIONALE DE CON
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Filing: 1969-12-18
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Granted: 1972-04-04
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Expires: 1989-12-18
Abstract
Abstract A method for impregnating fabrics, more particularly but not exclusively glass cloths, with plastics such as synthetic resins still in the fluid state, wherein a roll of the fabric is first subjected to the action of a substance intended to enhance the intimacy of the bond between the fibers and the impregnating plastic, and is thereafter exposed to a vacuum together with said plastic, following which the plastic content of the fabric is calibrated and the impregnated fabric is finally packaged for storage.
Inventors
- 👤 Andre Violleau
- 👤 Rene Louis Coffy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:43
CPC Classifications
D; D06; D06N; D06N7/00; B; B29; B29B; B29B15/00; B29B15/08; B29B15/10; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/22; D06B; D06B21/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
35 words
A method as claimed in claim 1, wherein the intimacy of the bond between the glass fibers and the synthetic resin is improved by exposing a roll of cloth to carbon dioxide at controlled temperature.
Claim 2
Dependent Claim
21 words
A method as claimed in claim 1, wherein the calibration is effected, after drying, by controlled compression of the impregnated cloth.
Claim 3
Dependent Claim
38 words
A method as claimed in claim 1, wherein the packaging includes the step of applying against at least one side of the impregnated fabric a non-permeable sheet-material which is chemically incompatible with the constituents of the impregnated cloth.
Claim 4
Dependent Claim
28 words
A method as claimed in claim 4, wherein the cloth covered with at least one packaging sheet is reformed into a roll and then stored at controlled temperatures.
Claim 5
Dependent Claim
21 words
A method as claimed in claim 1, wherein the synthetic resin is maintained at a temperature corresponding to its optimum viscosity.
Claim 6
Dependent Claim
21 words
A method as claimed in claim 1, wherein, prior to impregnation, the resin undergoes debubbling by agitation under a negative pressure.
References Cited (Backward Citations)
US1842111A
Cited
US3449152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |