US3670378A
Expired / Lapsed
US
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Process for the production of capacitors
Assignee: Siemens AG
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Filing: 1969-06-18
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Granted: 1972-06-20
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Expires: 1989-06-18
Abstract
Abstract Capacitors are manufactured by winding a number of parent or master windings one upon another, coating the windings in common with metal on the face sides thereof by a metal spraying process and separating them one from the other. In one instance, the master windings are separated one from the other by the provision of inactive layers which project at the face sides or ends of the windings to prevent contacting of the layers of the windings during metal spraying. In another embodiment the interlayers are dimensioned as wide as the capacitively active layers and the face-side zones of the interlayers are masked during the application of the metallic layers. In yet another embodiment the inactive layers are completely metal coated and separation is provided by sawing or cutting in the zone of the interlayers. In this case, the interlayers remain on the finished partial capacitor as cover layers.
Inventors
- 👤 Reinhard Behn
- 👤 Heinrich Gottlob
- 👤 Hans Haid
- 👤 Gerhard Hoyler
- 👤 Hartmut Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:37
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/30; H01G4/304; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
48 words
The process according to claim 1, wherein the winding of the separating layers is further defined as disposing the separating layers beyond the edges of the elongate capacitor bodies to prevent contact of the metallic films of different elongate capacitor bodies upon the application of the metallic coating.
Claim 2
Dependent Claim
26 words
The process according to claim 1, comprising the step of tempering the parent winding on the drum to compensate for tensions arising during the winding process.
Claim 3
Dependent Claim
35 words
The process according to claim 1, wherein at least one separating layer between each elongate capacitor body is a metal band and the step of separating along the separating layers includes removing the metal bands.
Claim 4
Dependent Claim
42 words
The process according to claim 1, wherein the step of forming the elongate capacitor bodies includes winding a heat-shrinkable plastic material for the dielectric films, and comprising the step of applying heat to the parent winding to shrink the heat shrinkable material.
Claim 5
Dependent Claim
17 words
The process according to claim 5, comprising the step of applying pressure to the heated parent winding.
Claim 6
Dependent Claim
28 words
The process according to claim 5, comprising the step of strengthening the parent winding by providing separating layers having about 0.25 percent solvent residue to increase adherence therebetween.
Claim 7
Dependent Claim
23 words
The process according to claim 1, comprising the step of masking the separating layers prior to the step of applying a metallic coating.
Claim 8
Dependent Claim
106 words
A process for the production of capacitors comprising the steps of: forming a plurality of elongate capacitor bodies by winding for each body alternate metallic and dielectric films on a drum; contemporaneously winding separating layers of steel bands between the elongate capacitor bodies to form a parent winding of alternate layers of capacitor bodies and steel bands; applying a metallic coating to the edges of the parent winding to connect the metallic films of the individual elongate capacitor bodies; and severing the parent winding into a plurality of individual capacitor bodies by dividing the parent winding at the steel bands and perpendicular to the steel bands.
Claim 9
Dependent Claim
72 words
The process according to claim 1, wherein the step of winding separating layers is further defined as winding separating layers of equal width as that of the dielectric films, the step of applying a metallic coating is further defined as completely covering the edges of the parent winding with a metallic coating, and the step of severing the parent winding includes the step of sawing in the range of the separating layers.
Claim 10
Dependent Claim
74 words
The process according to claim 1, wherein the step of winding separating layers is further defined as winding separating layers of equal width as that of the dielectric films, the step of applying a metallic coating is further defined as completely covering the edges of the parent winding with a metallic coating, and the step of severing is further defined to include the step of manually separating the individual condensers along the separating layers.
Claim 11
Dependent Claim
87 words
A process according to claim 1, wherein the step of winding separating layers is further defined as winding for each separating layer a plurality of separating layers in a superposed configuration of first and second layers which are equal in width to the width of said dielectric films and inbetween said first and second layers winding a third layer of a width greater than that of the dielectric films to prevent contact of the metallic films of different capacitor bodies upon the application of the metallic coating.
Claim 12
Dependent Claim
36 words
A process according to claim 4, wherein the step of winding a separating layer as a metal band is further defined as winding a separating layer of unhardened band steel having a width of 0.05-0.1 mm.
Claim 13
Dependent Claim
34 words
A process according to claim 1, wherein the step of winding separating layers is further defined as winding separating layers and extending the same approximately 1.5 mm beyond the edges of the capacitor bodies.
Claim 14
Dependent Claim
42 words
A process according to claim 1, wherein the non-metallic layers are made of plastic material and further comprising the steps of heating the parent winding and pressing the parent winding on the drum at an increased temperature to firm the plastic layers.
Claim 15
Dependent Claim
19 words
A process according to claim 1, including the step of applying a bonding agent between the films and layers.
Claim 16
Dependent Claim
36 words
A process according to claim 1, wherein the steps of winding are further defined as winding the dielectric films and their superposed metallic films so that adjacent dielectric and metallic films are offset from each other.
Claim 17
Dependent Claim
41 words
The process according to claim 1, wherein the non-metallic layers and foils are provided from plastic material, and comprising the step of prior to winding cutting oblique edges on the plastic films and layers to provide an offset effect when wound.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |