US3710440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of coaxial cable
Assignee: Phelps Dodge Copper Products Corp
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Filing: 1970-01-16
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Granted: 1973-01-16
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Expires: 1990-01-16
Abstract
Abstract A metal tape is advanced through a zone where it is formed into a tube surrounding the cable core passing through this zone, the core comprising the inner conductor and longitudinally spaced turns of solid insulation for spacing this conductor from the tube constituting the outer conductor. A foam-forming composition is coated on at least one of said core and tape in advance of the tube-forming zone and is expanded in the formed tube to provide an insulating foam filling the spaces between the turns of the solid insulation.
Inventors
- 👤 J Nevin
- 👤 L Dumire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:53
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/322; B29C44/324; H; H01; H01B; H01B11/00; H01B11/18; H01B11/1834; H01B11/1839; H01B13/00; H01B13/06; H01B13/067; H01B13/16; H01B13/165; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49123; Y10T29/53; Y10T29/53126; Y10T29/5313; Y10T29/532; Y10T29/53243
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
In the manufacture of a coaxial cable having a tubular outer conductor surrounding a core which includes an inner conductor and longitudinally spaced turns of substantially solid insulation on the inner conductor for spacing said conductors from each other, the method comprising the stePs of advancing said core and a metal tape through a tube-forming zone and there forming the tape into a tube surrounding the core, to provide said tubular outer conductor, said tape having an inner surface forming the inside of said tube, coating a foam-forming composition on substantially the entire area of at least one of said core and tape surface in advance of said tube-forming zone, and expanding said composition in the formed tube to provide a foam filling the spaces between said turns of the core.
Claim 2
Dependent Claim
131 words
In the manufacture of a coaxial cable having a tubular outer conductor surrounding a core which includes an inner conductor and longitudinally spaced turns of substantially solid insulation on the inner conductor for spacing said conductors from each other, the method comprising the stePs of advancing said core and a metal tape through a tube-forming zone and there forming the tape into a tube surrounding the core, to provide said tubular outer conductor, said tape having an inner surface forming the inside of said tube, coating a foam-forming composition on substantially the entire area of at least one of said core and tape surface in advance of said tube-forming zone, and expanding said composition in the formed tube to provide a foam filling the spaces between said turns of the core.
Claim 3
Dependent Claim
16 words
The method as in claim 1, in which said foam-forming composition is coated on the core.
Claim 4
Dependent Claim
23 words
The method as in claim 2, in which said coating is effected by passing the core through a mist of the foam-forming composition.
Claim 5
Dependent Claim
29 words
The method as in claim 1, in which said foam-forming composition is coated on that surface of the tape which becomes the inner surface of said tubular outer conductor.
Claim 6
Dependent Claim
56 words
The method as in claim 4, in which said composition prior to said coating includes a volatile liquid blowing agent and is maintained under pressure sufficient to prevent vaporization of said agent, said coating being effected by releasing said pressure and depositing the composition in the form of a froth on said surface of the tape.
Claim 7
Dependent Claim
42 words
The method as in claim 1, in which said core prior to the coating step is provided with a thin layer of substantially solid insulation integral with said turns and forming a dielectric barrier completely covering the inner conductor between said turns.
References Cited (Backward Citations)
GB149184A
Cited
US3118800A
Cited
US3344228A
Cited
US3309458A
Cited
US3452434A
Cited
US3411182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |