US3746827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Profiled electrode for electro-erosive boring
Assignee: Glanzstoff AG
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Filing: 1970-10-15
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Granted: 1973-07-17
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Expires: 1990-10-15
Abstract
Abstract A finely profiled copper electrode for electro-erosive boring having a multi-lobal cross-section of a plurality of radially extending arms having a thickness of less than about 80 microns and terminating within an outer circumference of less than about 600 microns, the electrode being formed by cold rolling a calibrated hard drawn copper wire with the ends of the arms being cut to size and shape. Such electrodes are especially useful in boring the openings in a nozzle plate for spinning profiled filaments of a fibrous polymer.
Inventors
- 👤 W Martin
- 👤 W Rieger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:20
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/04; B21; B21B; B21B1/00; B21B1/16; B21C; B21C37/00; B21C37/04; B21C37/045; B23D; B23D1/00; B23D1/20; B23D1/26; B21B13/00; B21B13/08; B21B13/10; B21B13/103; B21B3/00; B21B2003/005; B21B15/00; B21B15/0007; B21B2015/0021; B21B2203/00; B21B2203/22; B21B31/00; B21B31/16; B21B31/20; B21B31/22; B21B31/24; B21B31/28; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/9335; Y10S428/934; Y10T; Y10T428/00; Y10T428/12; Y10T428/12375; Y10T428/12382; Y10T428/29; Y10T428/2913; Y10T428/2973
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
21 words
A profiled electrode as claimed in claim 1 wherein said arms have a thickness of between about 20 and 60 microns.
Claim 2
Dependent Claim
20 words
A profiled electrode as claimed in claim 1 wherein said elongated element is composed of a substantially pure electrolytic copper.
Claim 3
Dependent Claim
22 words
A profiled electrode as claimed in claim 1 wherein said elongated element has a tri-lobal cross-section defined by three radially projecting arms.
Claim 4
Dependent Claim
20 words
A profiled electrode as claimed in claim 4 wherein said arms have thickness of between about 15 and 40 microns.
Claim 5
Dependent Claim
25 words
A profiled electrode as claimed in claim 1 wherein said elongated element is composed of a copper-tungsten alloy containing at least about 95 percent copper.
Claim 6
Dependent Claim
20 words
A profiled electrode as claimed in claim 1 with a Vickers hardness value of about 75 up to 110 kg/mm2.
Claim 7
Dependent Claim
20 words
A profiled electrode as claimed in claim 7 wherein said elongated element is composed of a substantially pure electrolytic copper.
Claim 8
Dependent Claim
24 words
A profiled electrode as claimed in claim 7 wherein said elongated element is composed of a copper-tungsten alloy containing at least 95 percent copper.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |