Patent US3904344A successfully refreshed from Google Patents.
US3904344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the formation of discontinuous filaments directly from molten material
Assignee: Battelle Development Corp
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Filing: 1974-02-19
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Granted: 1975-09-09
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Expires: 1994-02-19
Abstract
Abstract An apparatus for producing controlled length discontinuous products having a small cross-sectional area such as filaments or wire directly from a pool-like source of molten metal or a molten inorganic compound having a surface tension and viscosity similar to that of a molten metal by the application of a rotating heatextracting member to the surface of the pool of molten material so as to form the material into the desired shape by extracting a filamentary form of material from the supply of molten material having a length equal the distance between indentations on the outer edge of the narrow circumferential edge of the heatextracting member.
Inventors
- 👤 Robert E Maringer
- 👤 Alfred Rudnick
- 👤 Carroll E Mobley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:20
CPC Classifications
C; C03; C03B; C03B37/00; B; B22; B22D; B22D11/00; B22D11/005; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
138 words
An apparatus for the production of solid filaments from molten material which is at a temperature within 25 percent of its equilibrium melting point in *K, said molten material having a viscosity of 0.001 to 1.0 poise and a surface tension of 10 to 2,500 dynes/cm at said temperature, which apparatus comprises: a. a pool-like source of said molten material; b. a heat-extracting disk having at least one circumferentially extending peripheral edge upon which said filaments at least partially solidify, with said edge tapering to a narrow peripheral surface; c. at least one indentation on said edge disposed to limit the length of said filaments to the distance between said indentations; d. means of rotating said disk about its axis of rotation; and e. means of raising and lowering said disk relative to said pool of molten material.
Claim 2
Independent Claim
138 words
An apparatus for the production of solid filaments from molten material which is at a temperature within 25 percent of its equilibrium melting point in *K, said molten material having a viscosity of 0.001 to 1.0 poise and a surface tension of 10 to 2,500 dynes/cm at said temperature, which apparatus comprises: a. a pool-like source of said molten material; b. a heat-extracting disk having at least one circumferentially extending peripheral edge upon which said filaments at least partially solidify, with said edge tapering to a narrow peripheral surface; c. at least one indentation on said edge disposed to limit the length of said filaments to the distance between said indentations; d. means of rotating said disk about its axis of rotation; and e. means of raising and lowering said disk relative to said pool of molten material.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 wherein said peripheral edge is substantially V-shaped in cross-section with the apex of said V being the outermost circumference of said disk.
Claim 4
Dependent Claim
42 words
The apparatus of claim 2 wherein the angle between the legs of said V-shape is in the range of 60* to 120* and the radius of curvature at the tip of said V is in the range from 0.001 to 0.10 inch.
Claim 5
Dependent Claim
21 words
The apparatus of claim 1 wherein the taper of said peripheral edge results solely from its having a radius of curvature.
Claim 6
Dependent Claim
19 words
The apparatus of claim 1 wherein said radius of curvature of said peripheral edge is less than 0.50 inch.
Claim 7
Dependent Claim
13 words
The apparatus of claim 3 wherein said heat-extracting member is comprised of copper.
Claim 8
Dependent Claim
22 words
The apparatus of claim 6 wherein said edge has a surface finish in the range of from 16 to 20 microinch CLA.
Claim 9
Dependent Claim
16 words
The apparatus of claim 1 including means for cooling the disk during the filament forming process.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |