Patent US3769697A successfully refreshed from Google Patents.
US3769697A
Expired / Lapsed
US
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Method and apparatus for the continuous manufacture of a flexible waveguide
Assignee: Pirelli and C SpA
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Filing: 1971-05-03
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Granted: 1973-11-06
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Expires: 1991-05-03
Abstract
Abstract Method and apparatus for manufacturing long lengths of flexible waveguides which have an inner wall of a helically wound insulated conductor covered by insulating or metal tape over which a thermoplastic sheath is extruded, in which the insulated conductor is wound in a helix and advanced successively through tape winding and sheath extruding machines at a rate which permits each operation to be continuous. Subsequent to the extrusion of the sheath it is cooled and the waveguide is wound on a bobbin. Armoring and protective layers may be added to the waveguide prior to or subsequent to winding of the waveguide on the bobbin.
Inventors
- 👤 P Priaroggia
- 👤 A Portinari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:04
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/12; H01P3/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016; Y10T29/4902; Y10T29/49071; Y10T29/53; Y10T29/53126; Y10T29/5313; Y10T29/532
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
A method for continuously manufacturing a flexible waveguide having an inner wall formed by a helically wound conductor and a tubular sheath of synthetic resin therearound, said method comprising winding a helical conductor into a helix with contacting turns around a support at a first position while simultaneously advancing said helix in the direction of its axis, removing said helix from said support in a direction axially thereof as the helix is formed and advancing and guiding said helix as it is formed to a second position located in said direction with respect to said support while maintaining the turns of the helix in the relation in which they were wound, said advancing, guiding and maintaining being performed by roller means located between said first and second positions, extruding a sheath of synthetic resin around said helix at said second position as it is advanced and synchronizing the rate of winding and advance of said helix as well as the rate of extrusion of the resin of said sheath so that the waveguide is formed continuously with the desired sheath therearound.
Claim 2
Independent Claim
181 words
A method for continuously manufacturing a flexible waveguide having an inner wall formed by a helically wound conductor and a tubular sheath of synthetic resin therearound, said method comprising winding a helical conductor into a helix with contacting turns around a support at a first position while simultaneously advancing said helix in the direction of its axis, removing said helix from said support in a direction axially thereof as the helix is formed and advancing and guiding said helix as it is formed to a second position located in said direction with respect to said support while maintaining the turns of the helix in the relation in which they were wound, said advancing, guiding and maintaining being performed by roller means located between said first and second positions, extruding a sheath of synthetic resin around said helix at said second position as it is advanced and synchronizing the rate of winding and advance of said helix as well as the rate of extrusion of the resin of said sheath so that the waveguide is formed continuously with the desired sheath therearound.
Claim 3
Dependent Claim
89 words
A method as set forth in claim 1 wherein said waveguide has a layer of plastic tape intermediate said helix and said sheath, said tape having a width greater than the distance between corresponding points on adjacent turns of said helix, said method further comprising wrapping said tape over the turns of said helix intermediate the point of formation of said helix and the extrusion of said sheath therearound, the wrapping of said tape being synchronized with the advance of said helix so that the waveguide is formed continuously.
Claim 4
Dependent Claim
147 words
Apparatus for continuously manufacturing a flexible waveguide having an inner wall formed by a helically wound conductor and a tubular sheath of synthetic resin therearound, said apparatus comprising a support for said helix, a wire-distributor head for winding said conductor in a helix with contacting turns around said support, means for feeding said helix from said support in a direction axially of said helix, means in said direction with respect to said head for receiving said helix from said support, for maintaining the turns of said helix in the desired relative positions and for advancing said helix in the direction of the axis thereof at a speed synchronized with the rate at which said helix is formed, and an extrusion head in said direction with respect to said advancing means for receiving said helix and extruding said sheath thereover as said helix is continuously formed and advanced.
Claim 5
Dependent Claim
147 words
Apparatus for continuously manufacturing a flexible waveguide having an inner wall formed by a helically wound conductor and a tubular sheath of synthetic resin therearound, said apparatus comprising a support for said helix, a wire-distributor head for winding said conductor in a helix with contacting turns around said support, means for feeding said helix from said support in a direction axially of said helix, means in said direction with respect to said head for receiving said helix from said support, for maintaining the turns of said helix in the desired relative positions and for advancing said helix in the direction of the axis thereof at a speed synchronized with the rate at which said helix is formed, and an extrusion head in said direction with respect to said advancing means for receiving said helix and extruding said sheath thereover as said helix is continuously formed and advanced.
Claim 6
Dependent Claim
28 words
Apparatus as set forth in claim 3 further comprising a tape lapping head for wrapping tape on said helix disposed intermediate said advancing means and said extrusion head.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |