US3617437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of a composite material having aligned reinforcing fibers
Assignee: NAT RES DEV
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Filing: 1968-03-28
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Granted: 1971-11-02
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Expires: 1988-03-28
Abstract
Abstract A process for the manufacture of a composite material comprising a matrix containing aligned reinforcing fibers includes the steps of dispersing the fibers in a viscous liquid, passing the dispersion through an orifice so that the fibers are at least partially aligned, and laying the dispersion containing aligned fibers upon a permeable surface moving relative to the orifice at a velocity at least that at which the fiber dispersion leaves the orifice and withdrawing the viscous liquid through the permeable surface by suction sufficiently rapidly for the alignment of the fibers thereon to be maintained.
Inventors
- 👤 Greville Euan Gordon Bagg
- 👤 Leslie Ernest Dingle
- 👤 Ronald Hayden Jones
- 👤 Alexander William Harrow Pryde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:08
CPC Classifications
C; C22; C22C; C22C47/00; C22C47/02; C22C47/025; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; B29C70/14; C04; C04B; C04B30/00; C04B30/02; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4242; D04H1/58; D04H1/64; D04H1/645; D21; D21F; D21F11/00; D21F11/004; B22; B22F; B22F2998/00; B29K; B29K2307/00; B29K2709/00; B29K2709/02; B29K2709/04; B29K2709/12; C04B2111/00; C04B2111/00474; C04B2111/00905; C04B2111/00913
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
23 words
A process according to claim 1 wherein the permeable surface is the circumferential surface of a drum rotating about a substantially horizontal axis.
Claim 2
Dependent Claim
29 words
A process according to claim 2 wherein said aligned fibers are continuously formed as a felt upon and removed as a felt from the circumferential surface of the drum.
Claim 3
Dependent Claim
14 words
A process according to claim 6 wherein the permeable surface is a horizontal bed.
Claim 4
Dependent Claim
38 words
A process according to claim 1 wherein said orifice is in the form of a slit extending above the permeable surface in a direction transverse to the direction of relative movement of the orifice and the aligning surface.
Claim 5
Dependent Claim
19 words
A process according to claim 5 wherein said slit width at exit is between about 0.030 and 0.080 inches.
Claim 6
Dependent Claim
32 words
A process according to claim 1 wherein said velocity of relative movement between the orifice and the permeable surface is greater then the velocity at which the dispersion flows from the orifice.
Claim 7
Dependent Claim
39 words
A process according to claim 1 wherein said orifice is reciprocated longitudinal to the direction of relative movement of the permeable surface and above the permeable surface so that a sufficient thickness of aligned fiber sheet is built up.
Claim 8
Dependent Claim
63 words
A process according to claim 8 wherein said permeable surface beneath the reciprocating orifice moves unidirectionally and continuously at a velocity sufficient for each reciprocation of the orifice to deposit a layer of aligned fibers which overlaps and said movement is staggered from the layer deposited by the preceding reciprocation thereby producing a continuous sheet of aligned fiber of a sufficient multilayer thickness.
Claim 9
Dependent Claim
29 words
A process according to claim 1 in which the viscous liquid is selected from the group consisting of glycerine, glycerol, Aqueous solutions thereof, and aqueous solutions of cellulose ethers.
Claim 10
Dependent Claim
27 words
A process according to claim 1 wherein the reinforcing fibers are selected from the group of ceramic materials consisting of carbon, silicon carbide, silicon nitride and asbestos.
Claim 11
Dependent Claim
33 words
A process according to claim 1 wherein said aligned fiber on the permeable surface is washed free of viscous liquid while maintaining the fiber alignment and subsequently dried to give a handleable sheet.
References Cited (Backward Citations)
US2906660A
Cited
US3442997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |