US3896203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal method of forming filaments from an unconfined source of molten material
Assignee: Battelle Development Corp
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Filing: 1973-04-23
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Granted: 1975-07-22
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Expires: 1993-04-23
Abstract
Abstract A method of forming filamentary material by rotating the outer circumferential edge of a disk-like heat-extracting member in contact with an unconfined drop of molten material. An apparatus for carrying out the method comprising a disk-like heatextracting member having a V-shaped circumferential edge which contacts a drop of molten material produced by the local heating of an elongated solid member advanced toward the edge of the rotating member.
Inventors
- 👤 Robert E Maringer
- 👤 Jr Carroll E Mobley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:08
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/10; B22D; B22D11/00; B22D11/005; B22D11/06; B22D11/0611
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
78 words
A METHOD OF MAKING FILAMENTARY MATERIAL COMPRISING THE STEPS OF: A. HEATING A SOLID MATERIAL SO AS TO FORM AN ADHERENT PENDANT DROP. B. ROTATING A HEAT-EXTRACTING MEMBER AT A RATE SO AS YIELD A VELOCITY ON ITS CIRCUMFERENTIAL EDGE IN EXCESS OF 3 FEET PER SECOND, LIMITIN THE AREA ON SAID EDGE BY CONSTRUCTING SAID MEMBER WITH AT LEAST ONE CIRCUMFERENTIAL PROJECTION SAID MEMD. CONTRACTING THE SURFACE OF SAID PENDANT DROP OF MOLTEN MATERIAL WITH SAID EDGE.
Claim 2
Independent Claim
78 words
A METHOD OF MAKING FILAMENTARY MATERIAL COMPRISING THE STEPS OF: A. HEATING A SOLID MATERIAL SO AS TO FORM AN ADHERENT PENDANT DROP. B. ROTATING A HEAT-EXTRACTING MEMBER AT A RATE SO AS YIELD A VELOCITY ON ITS CIRCUMFERENTIAL EDGE IN EXCESS OF 3 FEET PER SECOND, LIMITIN THE AREA ON SAID EDGE BY CONSTRUCTING SAID MEMBER WITH AT LEAST ONE CIRCUMFERENTIAL PROJECTION SAID MEMD. CONTRACTING THE SURFACE OF SAID PENDANT DROP OF MOLTEN MATERIAL WITH SAID EDGE.
Claim 3
Dependent Claim
54 words
The method of claim 1 where said molten material has, at a temperature within 25 percent of its equilibrium melting point in degrees Kelvin; a surface tension in the range of 10 to 2,500 dynes per centimeter, a viscosity in the range of 10 3 to 1 poise and a reasonably discrete melting point.
Claim 4
Dependent Claim
11 words
The method of claim 2 where said material is a metal.
Claim 5
Dependent Claim
26 words
The method of claim 3 wherein said metal is an alloy having a base metal selected from the group consisting of: iron, aluminum, copper, and nickel.
Claim 6
Dependent Claim
38 words
The method of claim 3 wherein said molten metal is protected from oxidation and where said metal is an alloy having a base metal selected from the group consisting of: chromium, titanium, columbium, tantalum, zirconium, molybdenum and magnesium.
Claim 7
Dependent Claim
26 words
The method of claim 5 wherein the means of protecting said molten metal comprises an evacuated enclosure surrounding the molten metal and the rotating heat-extracting member.
Claim 8
Dependent Claim
13 words
The method of claim 2 wherein said molten material is an inorganic compound.
Claim 9
Dependent Claim
11 words
The method of claim 7 wherein said inorganic compound is Al2O3.
Claim 10
Dependent Claim
20 words
The method of claim 2 wherein said drop is formed by melting one end of a rod of solid material.
Claim 11
Dependent Claim
20 words
The method of claim 9 wherein said drop is positioned adjacent the upper 180* of a cylindrical rotating heat-extracting member.
Claim 12
Dependent Claim
47 words
The method of claim 1 wherein said projections are V-shaped and have a radus of curvature at the tip of said V in the range of from 0.0005 inch to 0.10 inch and said filament has a cross-sectional area less than 3 X 10 3 square inches.
Claim 13
Dependent Claim
39 words
The method of claim 11 where said V-shaped projections include a plurality of indentations disposed to attenuate said filament into discontinuous fiber having a length approximating the circumferential distance along the tip of said V-shaped projection between said indentations.
Claim 14
Independent Claim
111 words
A method of making filamentary material comprising the steps of: a. providing a pendant drop of molten material protruding from an orifice; said drop having a shape determined by the surface tension of said molten material; b. rotating a disk-like heat extracting member having at least one tapered circumferential projection at a rate so as to yield a velocity on its circumferential edge in excess of 3 feet per second; c. contacting the surface of said pendant drop of molten material with said projection; and d. withdrawing a solidifying filament from the drop on said projection while maintaining the form and stability of the pendant drop And without confining said drop.
Claim 15
Independent Claim
111 words
A method of making filamentary material comprising the steps of: a. providing a pendant drop of molten material protruding from an orifice; said drop having a shape determined by the surface tension of said molten material; b. rotating a disk-like heat extracting member having at least one tapered circumferential projection at a rate so as to yield a velocity on its circumferential edge in excess of 3 feet per second; c. contacting the surface of said pendant drop of molten material with said projection; and d. withdrawing a solidifying filament from the drop on said projection while maintaining the form and stability of the pendant drop And without confining said drop.
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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |