US3812901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing continuous filaments using a rotating heat-extracting member
Assignee: Battelle Development Corp
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Filing: 1973-01-30
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Granted: 1974-05-28
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Expires: 1993-01-30
Abstract
Abstract A method of stabilizing the release point of a filamentary product formed from the melt on a rotating heat-extracting member by applying a tension force to the filament subsequent to its release from the rotating member with the tension force of a magnitude to override variations in the adhesion of the filament to the rotating member. The filament is necessarily supported between the release point and the means used to generate the tension force in the filament.
Inventors
- 👤 C Mobley
- 👤 O Stewart
- 👤 R Maringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:58
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/005
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
70 words
In a method of forming filamentary material where said material solidifies in filament form adherent to a rotating heatextracting member the improvement of: stabilizing the release point of said filament from said rotating heat-extracting member by the application of a tension to said filament with said force drawing said filament into sliding contact with a support member positioned between said release point and the location of the tension exerting means.
Claim 2
Dependent Claim
70 words
In a method of forming filamentary material where said material solidifies in filament form adherent to a rotating heatextracting member the improvement of: stabilizing the release point of said filament from said rotating heat-extracting member by the application of a tension to said filament with said force drawing said filament into sliding contact with a support member positioned between said release point and the location of the tension exerting means.
Claim 3
Dependent Claim
148 words
The method of claim 1 wherein said release point is stabilized by the forces on said filament at its release point conform to the following relations FA + Delta < Fc + Fd + Fw + FT FT FTn + FTs Delta <<FTn where (in units of force) FA the minimum force of adhesion of said filament to said member Delta the deviation of the adhesion force above the value FA Fc the centrifugal force exerted on said filament while adherent to said member Fd the shear force exerted by differential thermal contraction at the interface of said filament and said member at the release point Fw the inherent normal force due to the unsupported weight of the continuous filament FT the tension force exerted on said filament FTn the component of FT normal to the forming surface FTs the component of FT parallel to the forming surface.
Claim 4
Dependent Claim
19 words
The method of claim 2 where said support member is below the free flight trajectory of the released filament.
Claim 5
Dependent Claim
54 words
The method of claim 1 where said filament is formed by forcing molten material through an orifice in the form of a free-standing stream of molten material and impinging said stream on the polished outer radial surface of a cylindrical rotating heat-extracting member before surface tension effects degrade said stream into a nonfilamentary form.
Claim 6
Dependent Claim
53 words
The method of claim 1 where said filament is formed by rotating the V-shaped outer radial surface of a disk-like heat-extracting member in contact with the surface of a pool of molten material at a rotational speed yielding a linear velocity at the circumference of said rotating member in excess of 3 ft/sec.
Claim 7
Dependent Claim
32 words
The method of claim 1 where the rate of heat removal from said filament subsequent to release from said rotating heat-extracting member is controlled by the thermal capacity of said support member.
Claim 8
Dependent Claim
21 words
The method of claim 6 where the rate of heat removal is lowered by providing a support with low thermal capacity.
Claim 9
Dependent Claim
21 words
The method of claim 6 where the rate of heat removal is accelerated by providing a support with high thermal capacity.
Claim 10
Dependent Claim
38 words
The method of claim 1 where said tension is exerted by directing said filament by means of said support member to the surface of a rotating horizontal turntable with said filament free to determine an equilibrium collection radius.
Claim 11
Dependent Claim
51 words
The method of claim 1 where said material has, at a temperature within 25 percent of its equilibrium melting point in *K, a viscosity in the range from 10 3 to 1 poise, a surface tension in the range of from 10 to 2000 dynes/cm, and a reasonably discrete melting point.
Claim 12
Dependent Claim
28 words
The method of claim 1 where said material is a metal selected from the group consisting of the alloys of: iron, aluminum, copper, zinc, tin, nickel, and cobalt.
Claim 13
Dependent Claim
30 words
The method of claim 1 where said material is a metal alloy selected from the group consisting of: 1100 aluminum, white cast iron, austenitic manganese steel, plain carbon mild steel.
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |