US3713477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing metallic short fibers
Assignee: Mitsui Kinzoku Co Ltd
•
Filing: 1971-02-26
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Granted: 1973-01-30
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Expires: 1991-02-26
Abstract
Abstract A method of manufacturing metallic short fibers comprising the steps: making the melt flow out through a small orifice under elevated pressure; and making the resulting solidified endless metallic fiber run against a slant cooling device to thereby break it into pieces of fixed length.
Inventors
- 👤 E Isobe
- 👤 K Someno
- 👤 Y Kuniyasu
- 👤 A Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:29
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/005; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
179 words
A method of manufacturing short metal fibers, which comprises: continuously extruding molten metal substantially vertically downwardly through a small orifice under elevated pressure to form a continuous, downwardly moving filament; immediately after the filament leaves the orifice, cooling the filament to solidify same without breaking same so that the solidified portion of the filament remains integral with the molten metal issuing from the nozzle, so that there is formed in the solidified portion of the filament a zone of increased brittleness at a position spaced downwardly from said orifice; continuing to move the filament substantially vertically downwardly and directing the lowermost tip of the solidified portion of the filament against the smooth upper surface of a target member, which surface is inclined with respect to the vertical, to bend the solidified filament and thereby to cause the filament to break substantially at said zone of increased brittleness to form a short fiber; and continuing to move said filament so that the lowermost tip thereof is repeatedly directed against said surface whereby said filament is repeatedly broken into short fibers.
Claim 2
Independent Claim
179 words
A method of manufacturing short metal fibers, which comprises: continuously extruding molten metal substantially vertically downwardly through a small orifice under elevated pressure to form a continuous, downwardly moving filament; immediately after the filament leaves the orifice, cooling the filament to solidify same without breaking same so that the solidified portion of the filament remains integral with the molten metal issuing from the nozzle, so that there is formed in the solidified portion of the filament a zone of increased brittleness at a position spaced downwardly from said orifice; continuing to move the filament substantially vertically downwardly and directing the lowermost tip of the solidified portion of the filament against the smooth upper surface of a target member, which surface is inclined with respect to the vertical, to bend the solidified filament and thereby to cause the filament to break substantially at said zone of increased brittleness to form a short fiber; and continuing to move said filament so that the lowermost tip thereof is repeatedly directed against said surface whereby said filament is repeatedly broken into short fibers.
Claim 3
Dependent Claim
21 words
A method according to claim 1, in which said member is made of metal and is maintained stationary during the method.
Claim 4
Dependent Claim
19 words
A method of manufacturing metallic short fibers according to claim 1, wherein said member is vertically and horizontally adjustable.
Claim 5
Dependent Claim
21 words
A method of manufacturing metallic short fibers according to claim 1, wherein said member is a hollow metalwork of water-cooled type.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |