US3685147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making coaxial cable
Assignee: Phelps Dodge Copper Products Corp
•
Filing: 1970-05-27
•
Granted: 1972-08-22
•
Expires: 1990-05-27
Abstract
Abstract An air dielectric coaxial cable includes a thin cylindrical center conductor supported by a concentric plastic insulating layer having a plastic helical web thereabout. In fabricating the cable, a tubular center conductor is formed from a thin metallic foil or tape and is passed continuously from the tube former through a stationary annular confining zone into a rotary die where the requisite insulating layer and web are extruded around this conductor.
Inventors
- 👤 John J Nevin
- 👤 Leo G Dumire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:15
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/06; H01B13/18; H01B13/20; H01B13/206; B; B29; B29C; B29C48/00; B29C48/15; H01B13/14; B29C48/03; B29C48/09; B29C48/11; B29C48/12; B29C48/13; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49123
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
185 words
In the fabrication of an air dielectriC coaxial cable, the method comprising the steps of passing a thin metallic tape through a forming die to render said tape tubular in cross section, continuously passing the tubular tape from said die to an extruding zone while adjacent overlapping edge portions of the tubular tape are detached from each other and while maintaining the tubular tape under confinement between inner and outer concentric stationary members to inhibit distortion of the tape from its tubular form, continuously passing the tubular tape from said outer confinement member into and through an extruding die in said zone while extruding insulating material around the tubular tape as it emerges from said outer member into the extruding die and while rotating the extruding die in the direction defined by the outermost of said overlapping edge portions, to form said material into a continuous layer and a helical web surrounding the tubular tape, and supporting the tubular tape internally in said extruding zone, whereby the tape emerging from the extruding zone is mechanically supported in tubular form by said layer and helical web.
Claim 2
Dependent Claim
185 words
In the fabrication of an air dielectriC coaxial cable, the method comprising the steps of passing a thin metallic tape through a forming die to render said tape tubular in cross section, continuously passing the tubular tape from said die to an extruding zone while adjacent overlapping edge portions of the tubular tape are detached from each other and while maintaining the tubular tape under confinement between inner and outer concentric stationary members to inhibit distortion of the tape from its tubular form, continuously passing the tubular tape from said outer confinement member into and through an extruding die in said zone while extruding insulating material around the tubular tape as it emerges from said outer member into the extruding die and while rotating the extruding die in the direction defined by the outermost of said overlapping edge portions, to form said material into a continuous layer and a helical web surrounding the tubular tape, and supporting the tubular tape internally in said extruding zone, whereby the tape emerging from the extruding zone is mechanically supported in tubular form by said layer and helical web.
Claim 3
Dependent Claim
186 words
In the fabrication of an air dielectric coaxial cable, the method comprising the steps of passing a thin metallic tape through a forming die to render said tape tubular in cross section, continuously passing the tubular tape from said die to an extruding zone while adjacent overlapping edge portions of the tubular tape are detached from each other and while maintaining the tubular tape under confinement between inner and outer concentric stationary members to inhibit distortion of the tape from its tubular form, continuously passing the tubular tape from said outer confinement member into and through an extruding die in said zone while continuously forcing insulating material into the die in an annular stream surrounding said outer confining member and tapering in the direction in which the tubular tape emerges from said outer member, continuously rotating the die to extrude the material from said stream into a continuous layer and a helical web surrounding the tubular tape, and supporting the tubular tape internally in said extruding zone, whereby the tape emerging from said zone is mechanically supported in tubular form by said layer and helical web.
Claim 4
Dependent Claim
186 words
In the fabrication of an air dielectric coaxial cable, the method comprising the steps of passing a thin metallic tape through a forming die to render said tape tubular in cross section, continuously passing the tubular tape from said die to an extruding zone while adjacent overlapping edge portions of the tubular tape are detached from each other and while maintaining the tubular tape under confinement between inner and outer concentric stationary members to inhibit distortion of the tape from its tubular form, continuously passing the tubular tape from said outer confinement member into and through an extruding die in said zone while continuously forcing insulating material into the die in an annular stream surrounding said outer confining member and tapering in the direction in which the tubular tape emerges from said outer member, continuously rotating the die to extrude the material from said stream into a continuous layer and a helical web surrounding the tubular tape, and supporting the tubular tape internally in said extruding zone, whereby the tape emerging from said zone is mechanically supported in tubular form by said layer and helical web.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |