US3703605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communications cables with sealed metallic moisture barriers
Assignee: AT&T Inc
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Filing: 1971-03-17
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Granted: 1972-11-21
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Expires: 1991-03-17
Abstract
Abstract Successive portions of an aluminum tape having one major surface thereof coated with an adhesive copolymer across the entire transverse width thereof and the other major surface precoated with a stripe of adhesive material along an edge portion are folded longitudinally about successive sections of a cable core which are being advanced along a predetermined path to form an overlapped seam so that the adhesive copolymer on an edge portion of the one major surface of the tape overlaps the stripe. Subsequently, the adhesive materials on the major surfaces along the overlapped seam develop an adhesive bond by the application of heat and pressure prior to or during the extrusion of a plastic jacket over the tape. The adhesive material on the other, now inwardly facing, major surface is substantially restricted in location and is adhesively bonded to the portion of the inwardly facing major surface of the tape which forms the overlapped seam with a portion of the one, now outwardly facing, major surface. The remaining portion of the inwardly facing major surface of the aluminum tape is bare and facilitates grounding the cable at a splice location.
Inventors
- 👤 Matthew R Dembiak
- 👤 George H Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:17
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/02; H01B11/06; H01B11/10; H01B11/1016; H01B9/00; H01B9/02; H01B9/022
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
252 words
An electrical cable, comprising a core; and a metallic tape having inwardly and outwardly facing major surfaces, and surrounding the core with at least one overlapped seam formed between portions of the major surfaces of the tape with the radius of curvature of the tape being substantially equal to the radius of curvature of the core; the tape having a first adhesive material precoated on at least part of an edge portion of one of the major surfaces of the tape forming the overlapped seam; further, the tape having a second adhesive material precoated on the other major surface of the metallic tape along an edge portion thereof with the adhesive material on the other major surface being adhesively bonded to portions of the other major surface of the tape which forms the overlapped seam with a portion of the one major surface, the remaining portion of the other major surface of the tape being at least partially bare; an adhesive bond occurring between the fIrst and the second adhesive materials precoated on the portions of the major surfaces forming the overlapped seam; the adhesive materials on the major surfaces being capable of developing an adhesive bond at a predetermined temperature along the overlapped seam; the first and the second adhesive materials composed essentially of ethylene acrylic acid copolymers; the second adhesive copolymer material having a melt index and an acrylic acid content which are substantially greater than the melt index and the acrylic acid content, respectively, of the first adhesive material.
Claim 2
Dependent Claim
252 words
An electrical cable, comprising a core; and a metallic tape having inwardly and outwardly facing major surfaces, and surrounding the core with at least one overlapped seam formed between portions of the major surfaces of the tape with the radius of curvature of the tape being substantially equal to the radius of curvature of the core; the tape having a first adhesive material precoated on at least part of an edge portion of one of the major surfaces of the tape forming the overlapped seam; further, the tape having a second adhesive material precoated on the other major surface of the metallic tape along an edge portion thereof with the adhesive material on the other major surface being adhesively bonded to portions of the other major surface of the tape which forms the overlapped seam with a portion of the one major surface, the remaining portion of the other major surface of the tape being at least partially bare; an adhesive bond occurring between the fIrst and the second adhesive materials precoated on the portions of the major surfaces forming the overlapped seam; the adhesive materials on the major surfaces being capable of developing an adhesive bond at a predetermined temperature along the overlapped seam; the first and the second adhesive materials composed essentially of ethylene acrylic acid copolymers; the second adhesive copolymer material having a melt index and an acrylic acid content which are substantially greater than the melt index and the acrylic acid content, respectively, of the first adhesive material.
Claim 3
Dependent Claim
242 words
An electrical cable, comprising: a core; and a metallic tape having inwardly and outwardly facing major surfaces, and surrounding the core with at least one overlapped seam formed between portions of the major surfaces of the tape with the radius of curvature of the tape being substantially equal to the radius of curvature of the core; the tape having a first adhesive material precoated on one of the major surfaces of the tape across the entire transverse width thereof; further, the tape having a second adhesive material precoated on the other major surface of the metallic tape along an edge portion thereof and being substantially restricted in location to and adhesively bonded to portions of the other major surface of the tape which forms the overlapped seam with a portion of the one major surface, the remaining portion of the other major surface of the tape being bare; an adhesive bond occurring between the first and the second adhesive materials precoated on the portions of the major surfaces forming the overlapped seam; the adhesive materials on the major surfaces being capable of developing an adhesive bond at a predetermined temperature along the overlapped seam; the first and the second adhesive materials being composed essentially of ethylene acrylic acid copolymers; the second adhesive copolymer material having a melt index and an acrylic acid content which are substantially greater than the melt index and the acrylic acid content, respectively, of the first adhesive material.
Claim 4
Dependent Claim
242 words
An electrical cable, comprising: a core; and a metallic tape having inwardly and outwardly facing major surfaces, and surrounding the core with at least one overlapped seam formed between portions of the major surfaces of the tape with the radius of curvature of the tape being substantially equal to the radius of curvature of the core; the tape having a first adhesive material precoated on one of the major surfaces of the tape across the entire transverse width thereof; further, the tape having a second adhesive material precoated on the other major surface of the metallic tape along an edge portion thereof and being substantially restricted in location to and adhesively bonded to portions of the other major surface of the tape which forms the overlapped seam with a portion of the one major surface, the remaining portion of the other major surface of the tape being bare; an adhesive bond occurring between the first and the second adhesive materials precoated on the portions of the major surfaces forming the overlapped seam; the adhesive materials on the major surfaces being capable of developing an adhesive bond at a predetermined temperature along the overlapped seam; the first and the second adhesive materials being composed essentially of ethylene acrylic acid copolymers; the second adhesive copolymer material having a melt index and an acrylic acid content which are substantially greater than the melt index and the acrylic acid content, respectively, of the first adhesive material.
Claim 5
Dependent Claim
27 words
The cable of claim 2, wherein the thickness of the precoating of first adhesive material is substantially greater in thickness than the precoating of second adhesive material.
Claim 6
Dependent Claim
28 words
The cable as set forth in claim 2, wherein the second adhesive material is capable of being applied in the form of a solution to the metallic tape.
Claim 7
Dependent Claim
35 words
The cable of claim 4, wherein the copolymer solution is a high melt index ethylene acrylic acid copolymer of greater than 15 per cent by weight acrylic acid in water solution which contains ammonium hydroxide.
Claim 8
Dependent Claim
241 words
An electrical cable, comprising: a core; a metallic tape having inwardly and outwardly facing major surfaces, the metallic tape surrounding the core and having an overlapped seam with the radius of curvature of the tape being substantially equal to the radius of curvature of the core; an extruded jacket of polymeric material surrounding the core and the metallic tape; a first adhesive material precoated on the outwardly facing major surface of the metallic tape across the entire transverse width thereof; a second adhesive material precoated on the inwardly facing major surface of the metallic tape along an edge portion thereof and being substantially restricted in location to and adhesively bonded to portions of the inwardly facing major surface of the tape which forms the overlapped seam with a portion of the outwardly facing major surface, the remaining portion of the inwardly facing major surface of the tape being bare; and an adhesive bond existing between the contiguous adjacent first and second adhesive materials along the overlapping seam; the adhesive materials on the major surfaces capable of developing a bond at a predetermined temperature less than the temperature at which the jacket is extruded; the first and the second adhesive materials being composed essenTially of ethylene acrylic acid copolymers; the second adhesive copolymer material having a melt index and an acrylic acid content which are substantially greater than the melt index and the acrylic acid content, respectively, of the first adhesive material.
Claim 9
Dependent Claim
241 words
An electrical cable, comprising: a core; a metallic tape having inwardly and outwardly facing major surfaces, the metallic tape surrounding the core and having an overlapped seam with the radius of curvature of the tape being substantially equal to the radius of curvature of the core; an extruded jacket of polymeric material surrounding the core and the metallic tape; a first adhesive material precoated on the outwardly facing major surface of the metallic tape across the entire transverse width thereof; a second adhesive material precoated on the inwardly facing major surface of the metallic tape along an edge portion thereof and being substantially restricted in location to and adhesively bonded to portions of the inwardly facing major surface of the tape which forms the overlapped seam with a portion of the outwardly facing major surface, the remaining portion of the inwardly facing major surface of the tape being bare; and an adhesive bond existing between the contiguous adjacent first and second adhesive materials along the overlapping seam; the adhesive materials on the major surfaces capable of developing a bond at a predetermined temperature less than the temperature at which the jacket is extruded; the first and the second adhesive materials being composed essenTially of ethylene acrylic acid copolymers; the second adhesive copolymer material having a melt index and an acrylic acid content which are substantially greater than the melt index and the acrylic acid content, respectively, of the first adhesive material.
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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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |