US4876140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminate conducting plastic
Assignee: FBK INTERNATIONAL Corp A CORP OF ALABAMA
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Filing: 1987-06-24
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Granted: 1989-10-24
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Expires: 2007-06-24
Abstract
Abstract A layer of conductive plastic material can be made to exhibit relatively high conductivity with a relatively small amount of electrically conducting particles included in it if the layer is extruded in a lamellate form. Particularly, sublayers having thicknesses of the size of the conducting particles or less being the randomly distributed particles in one sublayer into close proximity with those in adjacent sublayers. Consequently, relatively short conducting paths through the layer are provided. The laminate layer is formed by an extrusion die with a plurality of dividers adapted to divide the extrudate into sublayer prior to recombination for the extrusion of the final layer. The laminate layer can be coextruded with electrically insulating layers to fabricate electrical components such as capacitors.
Inventors
- 👤 John Quackenbush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:54
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/18; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B29C48/36; B29C48/50; B29C48/695; B29C48/70; B29C70/00; B29C70/58; B29C70/64; B29C70/88; B29C70/882; B32B27/06; B32B27/08; B32B27/20; H; H01; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008; B29C48/08; B29K; B29K2995/00; B29K2995/0003; B29K2995/0005; B32B2264/00; B32B2264/10; B32B2264/107; B32B2264/108; B32B2307/00; B32B2307/20; B32B2307/202; B32B2307/208; B32B2307/21; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2535/00; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S428/92; Y10S428/921; Y10S428/922; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/25; Y10T428/30
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
An article of multi-layered structure comprising a plastic resin including a multitude of particles dispersed in it, said resin being formed into a plurality of sublayers, each having a thickness on the order of thousandths of an inch or less and the particle size being about equal to the thickness of said sublayer or less to position the particles dispersed in each sublayer therein in close proximity to those dispersed in adjacent sublayers to provide relatively high electrically conducting paths through the particles in said plurality of sublayers.
Claim 2
Dependent Claim
88 words
An article of multi-layered structure comprising a plastic resin including a multitude of particles dispersed in it, said resin being formed into a plurality of sublayers, each having a thickness on the order of thousandths of an inch or less and the particle size being about equal to the thickness of said sublayer or less to position the particles dispersed in each sublayer therein in close proximity to those dispersed in adjacent sublayers to provide relatively high electrically conducting paths through the particles in said plurality of sublayers.
Claim 3
Dependent Claim
25 words
An article in accordance with claim 1 wherein said particles are electrically conducting and constitute between about 25% and 90% of said article by volume.
Claim 4
Dependent Claim
36 words
An article in accordance with claim 2 wherein said particles are carbon and have sizes from 0.5 to 250 microns and said sublayers have thicknesses greater than the size of the smaller of said carbon particles.
Claim 5
Dependent Claim
19 words
An article in accordance with claim 2 wherein each of said sublayers has a thickness of about 0.001 inch.
Claim 6
Dependent Claim
91 words
A laminate structure including a plurality of sublayers each comprising a plastic resin having a multitude of particles dispersed in it, each of said sublayers having a thickness on the order of thousandths of an inch or less, the particle size being about equal to the thickness of said sublayer or less, said sublayers being extruded in a manner to position particles dispersed in each sublayer into close proximity to particles dispersed in adjacent sublayers so as to provide relatively high electrically-conducting paths through the particles in said plurality of sublayers.
Claim 7
Dependent Claim
91 words
A laminate structure including a plurality of sublayers each comprising a plastic resin having a multitude of particles dispersed in it, each of said sublayers having a thickness on the order of thousandths of an inch or less, the particle size being about equal to the thickness of said sublayer or less, said sublayers being extruded in a manner to position particles dispersed in each sublayer into close proximity to particles dispersed in adjacent sublayers so as to provide relatively high electrically-conducting paths through the particles in said plurality of sublayers.
Claim 8
Dependent Claim
21 words
A laminate structure in accordance with claim 5 wherein said particles are electrically conducting, said structure also including spaced-apart electrical connections.
Claim 9
Dependent Claim
15 words
A laminate structure in accordance with claim 6 including three or more of said sublayers.
Claim 10
Dependent Claim
13 words
A laminate structure in accordance with claims 5 wherein said particles are magnetic.
Claim 11
Dependent Claim
13 words
A laminate structure in accordance with claims 5 wherein said particles are colorants.
Claim 12
Dependent Claim
13 words
A laminate structure in accordance with claims 5 wherein said particles are antistatic.
Claim 13
Dependent Claim
13 words
A laminate structure in accordance with claims 5 wherein said particles are lubricants.
Claim 14
Dependent Claim
14 words
A laminate structure in accordance with claims 5 wherein said particles are flame retardants.
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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |