US4367398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact element and process for the manufacture thereof
Assignee: Thermaflex Ltd
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Filing: 1979-02-26
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Granted: 1983-01-04
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Expires: 1999-02-26
Abstract
Abstract This invention relates to a contact element comprising a flat body of electrically insulating plastic material, a firmly adhering layer of electrically conductive, non-metallic particles on at least one surface of said plastic material, a dielectric adhesive on at least a portion of the surface of said layer of electrically conductive, non-metallic particles, and metal strips secured to said adhesive. This invention also relates to a process for the manufacture of the contact element.
Inventors
- 👤 Harald Strube
- 👤 Karl-Eduard Helf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:20
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/145; H05B3/02; H05B3/06; H05B3/20; H05B3/22; H05B3/26; H05B3/267; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
An electrical resistance tape having two contacts comprising a flat body of electrically insulating plastic material, a layer consisting exclusively of carbon black particles, said layer being firmly adhered to the surface of said plastic material without the aid of additional adhesive means, a dielectric adhesive on at least a portion of the surface of said layer of electrically conductive, non-metallic particles, and spaced metal strips secured to said adhesive, whereby electric current may be conducted in said layer for heating.
Claim 2
Dependent Claim
81 words
An electrical resistance tape having two contacts comprising a flat body of electrically insulating plastic material, a layer consisting exclusively of carbon black particles, said layer being firmly adhered to the surface of said plastic material without the aid of additional adhesive means, a dielectric adhesive on at least a portion of the surface of said layer of electrically conductive, non-metallic particles, and spaced metal strips secured to said adhesive, whereby electric current may be conducted in said layer for heating.
Claim 3
Dependent Claim
19 words
An electrical resistance tape according to claim 1 in which said insulating plastic material is an oriented polyester film.
Claim 4
Dependent Claim
15 words
An electrical resistance tape according to claim 1 in which said adhesive is a polyurethane.
Claim 5
Dependent Claim
33 words
An electrical resistance tape according to claim 1 in which said metal strips are secured by said adhesive to two opposite edges of said layer of carbon black particles on said flat body.
References Cited (Backward Citations)
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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) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |