US4031268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for spraying metallic patterns on a substrate
Assignee: Sirius Corp
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Filing: 1976-01-05
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Granted: 1977-06-21
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Expires: 1996-01-05
Abstract
Abstract Metallic patterns such as electrically conductive pathways are sprayed onto a metallic surface of a substrate by a high temperature flame spray process which process also is used to spray an intermediate layer of ceramic insulation onto the substrate. The patterns are formed in a template through which powdered electrically conductive material is sprayed by a spray gun and a low amperage alternating current of high voltage is applied between the substrate and the spray gun.
Inventors
- 👤 Thomas E. Fairbairn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:54
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/14; C; C23; C23C; C23C4/00; C23C4/01; H05K2203/00; H05K2203/13; H05K2203/1333; H05K2203/1344
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
172 words
In a method of spraying metallic patterns such as conductors of an electrical circuit onto a metallic supporting surface of a supporting base including cleaning and roughening the supporting surface; spraying a powdered bonding material onto the supporting surface by means of the flame spray process; spraying a powdered ceramic insulation layer onto the supporting surface by means of the flame spray process; and applying a self-supporting template to the ceramic-coated supporting surface, said template conforming the desired configuration of the electrical circuit conductors; the improvement comprising: spraying a powdered electrically conductive material through said template and onto said ceramic-coated surface by means of the flame spray process with a spray gun having a powder feed orifice and simultaneously apply a low amperage high voltage A.C. signal between the powder feed orifice of said gun and said metallic supporting surface; whereby an electrical circuit corresponding to the configuration of said template is formed on top of said ceramic-coated surface, with said ceramic coating insulating said current conductors from said metallic supporting surface.
Claim 2
Dependent Claim
172 words
In a method of spraying metallic patterns such as conductors of an electrical circuit onto a metallic supporting surface of a supporting base including cleaning and roughening the supporting surface; spraying a powdered bonding material onto the supporting surface by means of the flame spray process; spraying a powdered ceramic insulation layer onto the supporting surface by means of the flame spray process; and applying a self-supporting template to the ceramic-coated supporting surface, said template conforming the desired configuration of the electrical circuit conductors; the improvement comprising: spraying a powdered electrically conductive material through said template and onto said ceramic-coated surface by means of the flame spray process with a spray gun having a powder feed orifice and simultaneously apply a low amperage high voltage A.C. signal between the powder feed orifice of said gun and said metallic supporting surface; whereby an electrical circuit corresponding to the configuration of said template is formed on top of said ceramic-coated surface, with said ceramic coating insulating said current conductors from said metallic supporting surface.
Claim 3
Dependent Claim
33 words
The method of claim 1, wherein the template is reusable high heat resistant ceramic fiber paper pre-treated on both sides by the aplication of a ceramic coating by means of the flame spray.
Claim 4
Dependent Claim
12 words
The method of claim 2 wherein the ceramic fiber paper is kaolin.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein said voltage is in the range of 3,000 to 10,000 volts.
Claim 6
Dependent Claim
15 words
The method of claim 1, wherein said current is in the range of ten-to-forty milliamps.
References Cited (Backward Citations)
US3347698A
Cited
US3607381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |