US3783480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a capacitor
Assignee: US CAPACITORS Inc A CORP OF
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Filing: 1972-03-09
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Granted: 1974-01-08
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Expires: 1992-03-09
Abstract
Abstract Improved capacitors employing metal foil electrodes having polymeric dielectric coatings thereon are described for use at operating voltages up to moderately high values such as 1,0002,000V of either AC or DC. A bonding agent is used to bond together adjacent dielectric coatings, and an edge clearing technique is used to recess the edge of alternate electrodes on each side of the device.
Inventors
- 👤 J Booe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:54
CPC Classifications
H; H01; H01G; H01G13/00; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
16 words
A method according to claim 1, wherein the impregnated windings are radially pressed after step F.
Claim 2
Dependent Claim
13 words
A method according to claim 2, wherein the windings are heated during pressing.
Claim 3
Dependent Claim
23 words
A method according to claim 1, wherein a solventless liquid is used selected from the group consisting of solventless silicones and epoxy resins.
Claim 4
Independent Claim
115 words
A method for making capacitors comprising: applying a polymeric dielectric coating to a strip of electrode metal; allowing said coating to harden; slitting to expose at least one edge of the coated strip; edge clearing one exposed edge of said strip; applying a bonding agent in liquid form to at least one of two strips and said cleared edge; converting the bonding agent to a solid but fusible form; winding said strips upon a mandrel; heating said wound strips to fuse and cure the bonding agent; trimming the ends of said winding to expose the alternate uncleared edges of the electrodes; attaching a terminating coating to opposite ones of the exposed edges of said electrodes.
Claim 5
Dependent Claim
30 words
A method according to claim 5, wherein, after step G, the winding is removed from the mandrel, and is radially pressed and heated to fuse and/or cure the bonding agent.
Claim 6
Dependent Claim
31 words
A method according to claim 6, wherein, the bonding agent is a material which is fusible at a temperature below the softening point of said polymeric dielectric coating after step F.
Claim 7
Dependent Claim
33 words
A method according to claim 5, wherein the bonding agent is selected from the group consisting of silicone coating resins, ''''B stage'''' epoxy reins, ''''B stage'''' addition type polyimides, and thermoplastic bonding agents.
Claim 8
Independent Claim
106 words
A method for making capacitors comprising: applying a polymeric dielectric coating to a strip of electrode metal; allowing said coating to harden; slitting to expose at least one edge of the coated strip; edge clearing one exposed edge of said strip; applying a solventless bonding agent in liquid form to said strip and immediately thereafter winding a pair of said strips upon a mandrel; removing the winding from said mandrel and allowing said bonding agent to harden; trimming the ends of said winding to expose the alternate uncleared edges of the electrodes; attaching a terminating coating to opposite ones of the exposed edges of said electrodes.
Claim 9
Dependent Claim
11 words
A method according to claim 9, wherein winding is radially pressed.
Claim 10
Dependent Claim
13 words
A method according to claim 10, wherein the winding is heated during pressing.
Claim 11
Dependent Claim
26 words
A method according to claim 9, in which the bonding agent is a solventless liquid selected from the group consisting of solventless silicones and epoxy resins.
Claim 12
Independent Claim
153 words
A method of making a capacitor comprising the steps of providing means including a metal foil strip having an exposed metal edge With polymer dielectric means adhered to the metal foil strip, contacting the metal strip to a terminal of an electrical power source and contacting means for dissolving metal to another terminal of the electrical power source, dissolving exposed metal at one edge of the metal foil strip by exposing metal at the edge to the means for dissolving metal and electrical forces to provide a resulting metal foil edge recessed up to a small fraction of an inch from the edge of the polymer dielectric means, moving at least two of the resulting metal foil means together to provide a body including bonded together alternate layers having a recessed metal foil edge, and attaching electrode means to exposed metal foil edges at opposite ends of the body to provide a capacitor.
Claim 13
Dependent Claim
26 words
The method of claim 13, wherein the step of moving at least two of the means together includes winding means to provide a convolutely wound roll.
Claim 14
Dependent Claim
39 words
The method of claim 14, including the further step of, prior to attaching electrode means to the opposite ends of the body, radially pressing the wound roll and curing a bonding agent applied to the resulting metal foil means.
Claim 15
Dependent Claim
31 words
The method of claim 15, wherein the bonding agent is selected from the group including silicone coating resins, ''''B stage'''' epoxy resins; ''''B stage'''' addition type polyimides, and thermoplastic bonding agents.
Claim 16
Dependent Claim
14 words
The method of claim 13, wherein the layers of the body are substantially flat.
Claim 17
Dependent Claim
72 words
The method of claim 13, wherein the step of dissolving exposed metal of the metal foil strip includes exposing an edge of the metal foil strip to a solution in which the metal is at least partially soluble and in which the polymer dielectrical means is substantially insoluble, and maintaining the edge in contact with the solution for a length of time to dissolve the exposed edge of the metal foil strip.
Claim 18
Dependent Claim
19 words
The method of claim 13, wherein the polymer dielectric means is on opposite sides of the metal foil strip.
Claim 19
Dependent Claim
164 words
In a method of making a capacitor, the steps of contacting a polymer coated metal strip having an edge of exposed metal to a terminal of an electrical power source and contacting means in which metal of the polymer coated metal strip is at least partially soluble to another terminal of the electrical power source, exposing metal at the metal edge of the polymer coated metal strip to the means to cause removal of metal at the exposed edge in a controlled manner by the cooperative association of the means and electrical forces, removing the edge of the polymer coated strip from the means after a determined amount of metal is removed from the edge of the polymer coated metal strip, winding together two of the treated polymeric coated strips to provide a convolutely wound roll with removed metal edges at opposite ends of the wound roll, and impregnating the wound roll with a bonding agent to bond together adjacent polymer coated metal strips.
Claim 20
Dependent Claim
174 words
In a method of making a capacitor, the steps of contacting a polymer coated metal strip having an edge of exposed metal to a terminal of an electrical power source and contacting means in which metal of the polymer coated metal strip is at least partially soluble to another terminal of the electrical power source, exposing metal at the metal edge of the polymer coated metal strip to the means to cause removal of metal at the exposed edge in a controlled manner by the cooperative association of the means and electrical forces, removing the edge of the polymer coated strip from the means after a determined amount of metal is removed from the edge of the polymer coated metal strip, applying a bonding agent to a length of a treated polymer coated strip, and winding together the strip having bonding agent applied thereto and another treated polymer coated metal strip to provide a convolutely wound roll of bonding together treated polymer coated metal with removed edges at opposite ends of the wound roll.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |