US3597574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment for welding
Assignee: Continental Can Co Inc
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Filing: 1969-02-05
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Granted: 1971-08-03
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Expires: 1989-02-05
Abstract
Abstract This disclosure relates to electrical resistance welding and more particularly to the surface treatment of metal members along the faying and electrode engageable surfaces thereof. The faying surfaces are embossed or formed by a high energy rate method so as to be of a uniform finish whereby there will be a predetermined resistance between engaged faying surfaces thereby providing for a better control on the power required for forming a weld and the resultant metal weld.
Inventors
- 👤 Paul M Erlandson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:40
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/16; B23K11/163; B23K11/08; B23K11/087; B23K11/0873; B23K11/0876; B23K11/14; B23K11/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
In a process of providing uniform resistance welds between metal members which includes the steps of preparing faying surfaces of the members, bringing the faying surfaces together under a controlled pressure loading, and coupling the members to a source of electrical energy to resistance heat and weld together the members along the faying surfaces; the improvement residing in embossing the faying surface to an overall uniform roughness.
Claim 2
Dependent Claim
67 words
In a process of providing uniform resistance welds between metal members which includes the steps of preparing faying surfaces of the members, bringing the faying surfaces together under a controlled pressure loading, and coupling the members to a source of electrical energy to resistance heat and weld together the members along the faying surfaces; the improvement residing in embossing the faying surface to an overall uniform roughness.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the faying surfaces are prepared by high energy rate metal forming.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein the faying surfaces have a finish on the order of 1 micron and less centerline average.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein the faying surfaces have a finish on the order of 0.2 micron centerline average.
Claim 6
Dependent Claim
35 words
The process of claim 1 wherein electrode engageable surfaces of the members remote from the faying surfaces are also prepared to a uniform roughness of a greater roughness than the roughness of the faying surfaces.
Claim 7
Dependent Claim
22 words
The method of claim 5 wherein each faying surface and the associated electrode engageable surface are simultaneously formed in a single operation.
Claim 8
Dependent Claim
28 words
The proceSs of claim 1 wherein any protective coating existing on the metal members is removed prior to the preparing of the faying surfaces to a uniform roughness.
References Cited (Backward Citations)
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Cited
US2287540A
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US2897340A
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US2999146A
Cited
US3228103A
Cited
US3400449A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |