US4010315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shielding tape for cables
Assignee: Dow Chemical Co
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Filing: 1975-04-25
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Granted: 1977-03-01
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Expires: 1995-04-25
Abstract
Abstract A cable shielding tape comprising a first layer of substantially pure aluminum bonded to a second layer of aluminum alloy which can beneficially be used in cable constructions designed for the transmission of electric power or communications. The cable shielding tape may be formed as a strip having one or both sides coated with or laminated to an adhesive thermoplastic resinous polymer. The tape is disposed within a cable at the desired location to provide good mechanical and electrical properties therein. In addition to providing good mechanical and electrical properties for a cable, the aluminum/aluminum alloy shielding tape substantially reduces the problem of bi-metallic galvanic corrosion caused as a result of interfacing metals having widely differing electrolytic potentials.
Inventors
- 👤 Raymond C. Mildner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:57
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/18; H01B7/20; H01B7/205; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12556; Y10T428/12569; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
75 words
A cable shielding tape comprising a first layer of substantially pure aluminum bonded to a second layer of aluminum alloy, said aluminum alloy having an elongation to break of at least about 15 percent, a yield strength of at least about 13,000 pounds per square inch, a brinell hardness of at least about 30 and an electrolytic solution potential within about 0.05 volts of the substantially pure aluminum on the basis of N/10 calomel electrodes.
Claim 2
Dependent Claim
75 words
A cable shielding tape comprising a first layer of substantially pure aluminum bonded to a second layer of aluminum alloy, said aluminum alloy having an elongation to break of at least about 15 percent, a yield strength of at least about 13,000 pounds per square inch, a brinell hardness of at least about 30 and an electrolytic solution potential within about 0.05 volts of the substantially pure aluminum on the basis of N/10 calomel electrodes.
Claim 3
Dependent Claim
24 words
The cable shielding tape of claim 1 wherein a first layer of thermoplastic resinous polymeric material is adhered to one side of said tape.
Claim 4
Dependent Claim
37 words
The cable shielding tape of claim 2 wherein a second layer of thermoplastic resinous polymeric material is adhered to the opposite side of said tape, said tape being disposed between said layers of thermoplastic resinous polymeric material.
Claim 5
Dependent Claim
22 words
The cable shielding tape of claim 2 wherein said polymeric material is a copolymer of ethylene and an ethylenically unsaturated carboxylic acid.
Claim 6
Dependent Claim
15 words
The cable shielding tape of claim 4 wherein said unsaturated carboxylic acid is acrylic acid.
Claim 7
Dependent Claim
43 words
The cable shielding tape of claim 1 wherein a third layer of substantially pure aluminum is bonded to the opposite side of said second layer of aluminum alloy, said second layer of aluminum alloy being disposed between said layers of substantially pure aluminum.
Claim 8
Dependent Claim
24 words
The cable shielding tape of claim 6 wherein a first layer of thermoplastic resinous polymeric material is adhered to one side of said tape.
Claim 9
Dependent Claim
37 words
The cable shielding tape of claim 7 wherein a second layer of thermoplastic resinous polymeric material is adhered to the opposite side of said tape, said tape being disposed between said layers of thermoplastic resinous polymeric material.
Claim 10
Dependent Claim
22 words
The cable shielding tape of claim 7 wherein said polymeric material is a copolymer of ethylene and an ethylenically unsaturated carboxylic acid.
Claim 11
Dependent Claim
15 words
The cable shielding tape of claim 9 wherein said unsaturated carboxylic acid is acrylic acid.
Claim 12
Dependent Claim
132 words
A cable shielding tape comprising at least one layer of aluminum which is at least about 99 weight percent pure aluminum bonded to at least one layer of aluminum alloy, said alloy comprising aluminum having a weight of less than 99 percent and a component selected from the group consisting essentially of magnesium having a weight percent from about 0.2 to about 6, manganese having a weight percent from about 0.1 to about 2, chromium having a weight percent from about 0.1 to about 0.5, copper having a weight percent from about 0.1 to about 1, zinc having a weight percent from about 0.05 to about 2.5, silicon having a weight percent from about 0.1 to about 2, iron having a weight percent from about 0.1 to about 1 and mixtures thereof.
Claim 13
Dependent Claim
132 words
A cable shielding tape comprising at least one layer of aluminum which is at least about 99 weight percent pure aluminum bonded to at least one layer of aluminum alloy, said alloy comprising aluminum having a weight of less than 99 percent and a component selected from the group consisting essentially of magnesium having a weight percent from about 0.2 to about 6, manganese having a weight percent from about 0.1 to about 2, chromium having a weight percent from about 0.1 to about 0.5, copper having a weight percent from about 0.1 to about 1, zinc having a weight percent from about 0.05 to about 2.5, silicon having a weight percent from about 0.1 to about 2, iron having a weight percent from about 0.1 to about 1 and mixtures thereof.
Claim 14
Dependent Claim
24 words
The cable shielding tape of claim 11 wherein a first layer of thermoplastic resinous polymeric material is adhered to one side of said tape.
Claim 15
Dependent Claim
37 words
The cable shielding tape of claim 12 wherein a second layer of thermoplastic resinous polymeric material is adhered to the opposite side of said tape, said tape being disposed between said layers of thermoplastic resinous polymeric material.
Claim 16
Dependent Claim
22 words
The cable shielding tape of claim 12 wherein said polymeric material is a copolymer of ethylene and an ethylenically unsaturated carboxylic acid.
Claim 17
Dependent Claim
15 words
The cable shielding tape of claim 14 wherein said unsaturated carboxylic acid is acrylic acid.
Claim 18
Dependent Claim
47 words
The cable shielding tape of claim 11 wherein a second layer of aluminum which is at least about 99 weight percent pure aluminum is bonded to the opposite side of said layer of aluminum alloy, said layer of aluminum alloy being disposed between said layers of aluminum.
Claim 19
Dependent Claim
23 words
The cable shielding tape of claim 16 wherein a layer of thermoplastic resinous polymeric material is adhered to one side of said tape.
Claim 20
Dependent Claim
37 words
The cable shielding tape of claim 17 wherein a second layer of thermoplastic resinous polymeric material is adhered to the opposite side of said tape, said tape being disposed between said layers of thermoplastic resinous polymeric material.
Claim 21
Dependent Claim
22 words
The cable shielding tape of claim 17 wherein said polymeric material is a copolymer of ethylene and an ethylenically unsaturated carboxylic acid.
Claim 22
Dependent Claim
15 words
The cable shielding tape of claim 19 wherein said unsaturated carboxylic acid is acrylic acid.
Claim 23
Dependent Claim
114 words
A cable for the transmission of electric power or communications comprising a core including insulated conductor means, a shield completely surrounding the circumference of said core and an outer jacket of insulation over the outside of said shields, said shield comprising a tape having a first layer of substantially pure aluminum bonded to a second layer of aluminum alloy, said aluminum alloy having an elongation to break of at least about 15 percent, a yield strength of at least about 13,000 pounds per square inch, a brinell hardness of at least about 30 and an electrolytic solution potential within about 0.05 volts of the substantially pure aluminum on the basis of N/10 calomel electrodes.
Claim 24
Dependent Claim
114 words
A cable for the transmission of electric power or communications comprising a core including insulated conductor means, a shield completely surrounding the circumference of said core and an outer jacket of insulation over the outside of said shields, said shield comprising a tape having a first layer of substantially pure aluminum bonded to a second layer of aluminum alloy, said aluminum alloy having an elongation to break of at least about 15 percent, a yield strength of at least about 13,000 pounds per square inch, a brinell hardness of at least about 30 and an electrolytic solution potential within about 0.05 volts of the substantially pure aluminum on the basis of N/10 calomel electrodes.
Claim 25
Dependent Claim
22 words
The cable of claim 21 wherein a first layer of thermoplastic resinous polymeric material is adhered to one side of said tape.
Claim 26
Dependent Claim
35 words
The cable of claim 22 wherein a second layer of thermoplastic resinous polymeric material is adhered to the opposite side of said tape, said tape being disposed between said layers of thermoplastic resinous polymeric material.
Claim 27
Dependent Claim
20 words
The cable of claim 22 wherein said polymeric material is a copolymer of ethylene and an ethylenically unsaturated carboxylic acid.
Claim 28
Dependent Claim
13 words
The cable of claim 24 wherein said unsaturated carboxylic acid is acrylic acid.
Claim 29
Dependent Claim
41 words
The cable of claim 21 wherein a third layer of substantially pure aluminum is bonded to the opposite side of said second layer of aluminum alloy, said second layer of aluminum alloy being disposed between said layers of substantially pure aluminum.
Claim 30
Dependent Claim
22 words
The cable of claim 26 wherein a first layer of thermoplastic resinous polymeric material is adhered to one side of said tape.
Claim 31
Dependent Claim
35 words
The cable of claim 27 wherein a second layer of thermoplastic resinous polymeric material is adhered to the opposite side of said tape, said tape being disposed between said layers of thermoplastic resinous polymeric material.
Claim 32
Dependent Claim
20 words
The cable of claim 27 wherein said polymeric material is a copolymer of ethylene and an ethylenically unsaturated carboxylic acid.
Claim 33
Dependent Claim
13 words
The cable of claim 29 wherein said unsaturated carboxylic acid is acrylic acid.
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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |