US4430385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositely insulated conductor having a layer of irradiation cross-linked polymeric plastic material
Assignee: AT&T Inc
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Filing: 1982-02-18
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Granted: 1984-02-07
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Expires: 2002-02-18
Abstract
Abstract An elongated metallic conductor is insulated with an inner layer of a plasticized polyvinyl chloride composition and an outer layer of a plasticized, irradiation cross-linked polyvinyl chloride composition. The outer layer has a low coefficient of friction to facilitate pulling in central office racks, has mechanical properties which are required for installation and use and, in a preferred embodiment, has a thickness which is substantially less than that of the inner layer. The layers are extruded in the same extruder crosshead that seemingly causes the outer layer to bond to the inner layer to facilitate stripping of the composite insulation from the conductor.
Inventors
- 👤 Harry M. Dillow
- 👤 Anthony E. Sansone
- 👤 Raymond K. Swartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:12
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/443; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/298
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A compositely insulated conductor, which comprises: an elongated metallic conductor; an inner layer of insulation which covers said conductor and which comprises a plasticized polyvinyl chloride composition; and an outer layer of insulation being disposed about said inner layer and having a thickness which is substantially less than that of said inner layer, said outer layer comprising an irradiation cross-linked, plasticized polyvinyl chloride composition and having an adhesion to said inner layer which is substantially greater than that of said inner layer to said elongated metallic conductor and which is sufficient to cause any elongation of the adhered inner and outer layers to be substantially unitary.
Claim 2
Dependent Claim
106 words
A compositely insulated conductor, which comprises: an elongated metallic conductor; an inner layer of insulation which covers said conductor and which comprises a plasticized polyvinyl chloride composition; and an outer layer of insulation being disposed about said inner layer and having a thickness which is substantially less than that of said inner layer, said outer layer comprising an irradiation cross-linked, plasticized polyvinyl chloride composition and having an adhesion to said inner layer which is substantially greater than that of said inner layer to said elongated metallic conductor and which is sufficient to cause any elongation of the adhered inner and outer layers to be substantially unitary.
Claim 3
Dependent Claim
31 words
The insulated conductor of claim 1, wherein said inner layer has a thickness in the range of about 0.015 cm and said outer layer has a thickness of about 0.005 cm.
Claim 4
Dependent Claim
34 words
The insulated conductor of claim 1, wherein said inner layer has a thickness in the range of about 0.033 cm and said outer layer has a thickness in the range of about 0.013 cm.
Claim 5
Dependent Claim
28 words
The insulated conductor of claim 1, wherein said irradiation cross-linked composition of said outer layer has an irradiation dose history that is substantially constant throughout said outer layer.
Claim 6
Dependent Claim
23 words
The insulated conductor of claim 1, wherein said outer layer has a thickness which is substantially equal to that of said inner layer.
Claim 7
Dependent Claim
23 words
The insulated conductor of claim 1, wherein said inner and said outer layers of insulation have a composite percent elongation of about 200%.
Claim 8
Dependent Claim
16 words
The insulated conductor of claim 1, wherein said elongated metallic conductor is a tinned copper conductor.
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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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |