US3864798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of encapsulating end-contacted electrical components
Assignee: Siemens AG
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Filing: 1973-08-22
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Granted: 1975-02-11
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Expires: 1993-08-22
Abstract
Abstract A method of encapsulating an end contacted electrical component, provided with connecting wires, with a continuous layer of synthetic resin material serving as insulation and protection, by a vortex sintering process by attaching a metal foil to the component or wrapping the component with a metal foil or a metalized synthetic resin foil with the metalization facing outwardly, in such a manner that no electrical contact is formed between the end contacts and thereafter placing the wrapped component in a reservoir containing a suspended synthetic resin powder maintained in a turbulent motion and heating the component indirectly by inductance using high frequency current so as to fuse or sinter resin powder deposited on the component to form the synthetic resin layer, the heating being conducted only after the component has been placed in the reservoir.
Inventors
- 👤 Ferdinand Utner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:50
CPC Classifications
H; H01; H01G; H01G2/00; H01G2/12; H01G13/00; H01G13/003; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49092
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
87 words
A METHOD OF ENCAPSULATING AN ELECTRICAL COMPONENT WITH A CONTINUOUS LAYER OF SYNTHETIC RESIN MATERIAL WHICH SERVES AS INSULATION AND PROTECTION, THE COMPONENT INCLUDING END CONTACTS, COMPRISING THE STEPS OF: ATTACHING A METAL FOIL TO THE COMPONENT SO THAT THERE IS ELECTRICAL DISCONTINUITY BETWEEN THE END CONTACTS WHILE CONTEMPORANEOUSLY ELECTRICALLY INSULATING THE METAL FOIL FROM THE ENTIRE COMPONENT; PLACING THE COMPONENT IN AN ENVIRONMENT OF SYNTHETIC RESIN POWDER; AND HEATING THE COMONENT WHILE IN THE SYNTHETIC RESIN POWDER ENVIRONMENT TO SINTER RESIN POWDER ADHERING TO THE COMPONENT.
Claim 2
Independent Claim
87 words
A METHOD OF ENCAPSULATING AN ELECTRICAL COMPONENT WITH A CONTINUOUS LAYER OF SYNTHETIC RESIN MATERIAL WHICH SERVES AS INSULATION AND PROTECTION, THE COMPONENT INCLUDING END CONTACTS, COMPRISING THE STEPS OF: ATTACHING A METAL FOIL TO THE COMPONENT SO THAT THERE IS ELECTRICAL DISCONTINUITY BETWEEN THE END CONTACTS WHILE CONTEMPORANEOUSLY ELECTRICALLY INSULATING THE METAL FOIL FROM THE ENTIRE COMPONENT; PLACING THE COMPONENT IN AN ENVIRONMENT OF SYNTHETIC RESIN POWDER; AND HEATING THE COMONENT WHILE IN THE SYNTHETIC RESIN POWDER ENVIRONMENT TO SINTER RESIN POWDER ADHERING TO THE COMPONENT.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein the step of heating is more particularly defined as indirectly heating the component by induction heating with a high frequency current.
Claim 4
Dependent Claim
24 words
The method of claim 1, wherein the step of attaching a metal foil is further defined as wrapping a metal foil about the component.
Claim 5
Dependent Claim
31 words
The method of claim 1, wherein the step of attaching a metal foil is further defined as wrapping a metalized synthetic resin layer about the component with the metalization facing outwardly.
Claim 6
Dependent Claim
44 words
The method of claim 1, wherein the step of placing the component in an environment of synthetic resin powder is further defined by the steps of providing a turbulent suspension of synthetic resin powder in a reservoir and placing the component within the reservoir.
Claim 7
Dependent Claim
37 words
The method of claim 1, wherein the step of attaching a metal foil is further defined by the step of positioning a metal foil spaced from at least oNe of the end contacts to provide a gap.
Claim 8
Dependent Claim
34 words
The method of claim 1, wherein the step of attaching a metal foil is further defined by the step of positioning the metal foil between and spaced from the end contacts of the component.
Claim 9
Independent Claim
103 words
A method of encapsulating an electrical component with a continuous layer of synthetic resin material which serves as insulation and protection, the component including end contacts, comprising the steps of: wrapping the component with a metalized synthetic resin layer, while electrically insulating the entire component from the metalization by positioning the layer with the metalization facing outwardly and spaced from at least one of the end contacts; placing the wrapped component within a reservoir containing turbulently suspended synthetic resin powder; and heating the wrapped component only after the placement thereof within the reservoir to sinter on synthetic resin powder adhering to the component.
Claim 10
Independent Claim
103 words
A method of encapsulating an electrical component with a continuous layer of synthetic resin material which serves as insulation and protection, the component including end contacts, comprising the steps of: wrapping the component with a metalized synthetic resin layer, while electrically insulating the entire component from the metalization by positioning the layer with the metalization facing outwardly and spaced from at least one of the end contacts; placing the wrapped component within a reservoir containing turbulently suspended synthetic resin powder; and heating the wrapped component only after the placement thereof within the reservoir to sinter on synthetic resin powder adhering to the component.
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |