Patent US4247280A successfully refreshed from Google Patents.
US4247280A
Expired / Lapsed
US
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Cable insulation cross-linking apparatus with catenary and rectilinear cross-linking tubes
Assignee: Pirelli and C SpA
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Filing: 1979-12-13
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Granted: 1981-01-27
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Expires: 1999-12-13
Abstract
Abstract Apparatus for the continuous cross-linking or vulcanizing of material on a conductor comprising a tube with a vulcanizing section in the shape of a catenary arc with the convex portion facing downwardly and with its ends at substantially the same level and a rectilinear cooling section extending upwardly and with its axis tangent to the axis of the catenary arc at the end of the vulcanizing section which adjoins the cooling section. Hot, non-aqueous liquid is circulated in the vulcanizing section and an inert cooling gas under pressure is circulated in the cooling section, the liquid being exposed to the gas where the sections meet. Inert gas also contacts the liquid at the end of the vulcanizing section remote from the cooling section, and a tank containing the liquid is disposed so that the level of the liquid in the tank is the same as the level of the liquid in the vulcanizing section. In the absence of liquid in the tube, inert gas may be circulated in both sections.
Inventors
- 👤 Marcello Sarracino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:21
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/04; B29C35/06; B29C35/065; H; H01; H01B; H01B13/00; H01B13/06; H01B13/14; H01B13/145; B29C48/00; B29C48/03; B29C48/05; B29K; B29K2021/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
251 words
Continuous vulcanizing apparatus comprising a tube having a vulcanizing section and a cooling section in series with each other, the vulcanizing section having the shape of catenary arc with the convex side thereof facing downwardly and with portions thereof on opposite sides of the apex of the arc at the same level and the cooling section being rectilinear and disposed with its axis as an extension of the axis of the vulcanization section where the cooling section joins the vulcanizing section, said axis of said cooling section thereby extending upwardly, means for supplying a non-aqueous, heating liquid to said vulcanizing section, means connected to spaced portions of the vulcanizing section for circulating said liquid in said vulcanizing section, means for supplying a cooling, inert gas to said cooling section, means connected to spaced portions of the cooling section for circulating said gas in said cooling section, said vulcanizing section being open at its one end to the adjacent cooling section to permit said gas to contact said liquid, means for closing said vulcanizing section at its opposite end and means for closing said cooling section at its end remote from the vulcanizing section to permit said liquid and said gas to be under pressure within said tube, means for supplying a conductor with unvulcanized material thereon into said tube at said opposite end of said vulcanizing section, and means for withdrawing said conductor with the material thereon after vulcanization from said end of said cooling section remote from said vulcanizing section.
Claim 2
Dependent Claim
251 words
Continuous vulcanizing apparatus comprising a tube having a vulcanizing section and a cooling section in series with each other, the vulcanizing section having the shape of catenary arc with the convex side thereof facing downwardly and with portions thereof on opposite sides of the apex of the arc at the same level and the cooling section being rectilinear and disposed with its axis as an extension of the axis of the vulcanization section where the cooling section joins the vulcanizing section, said axis of said cooling section thereby extending upwardly, means for supplying a non-aqueous, heating liquid to said vulcanizing section, means connected to spaced portions of the vulcanizing section for circulating said liquid in said vulcanizing section, means for supplying a cooling, inert gas to said cooling section, means connected to spaced portions of the cooling section for circulating said gas in said cooling section, said vulcanizing section being open at its one end to the adjacent cooling section to permit said gas to contact said liquid, means for closing said vulcanizing section at its opposite end and means for closing said cooling section at its end remote from the vulcanizing section to permit said liquid and said gas to be under pressure within said tube, means for supplying a conductor with unvulcanized material thereon into said tube at said opposite end of said vulcanizing section, and means for withdrawing said conductor with the material thereon after vulcanization from said end of said cooling section remote from said vulcanizing section.
Claim 3
Dependent Claim
39 words
Continuous vulcanizing apparatus as set forth in claim 1 further comprising means for supplying an inert gas to said tube at said opposite end thereof to provide a pocket of said gas intermediate said opposite end and said liquid.
Claim 4
Dependent Claim
31 words
Continuous vulcanizing apparatus as set forth in claim 2 wherein the inert gas supplied to said opposite end of said tube is the same as the gas in said cooling section.
Claim 5
Dependent Claim
112 words
Continuous vulcanizing apparatus as set forth in claim 1, 2 or 3 further comprising means for maintaining the liquid level in said vulcanizing section at a predetermined level comprising a tank for receiving said liquid and disposed with a portion thereof below said opposite end of said vulcanizing section, liquid supplying means for supplying said liquid to said tank, means responsive to the level of said liquid in said tank and connected to said liquid supplying means for controlling the supply of said liquid to said tank and means connecting said tank to said tube at said opposite end of said vulcanizing section for liquid flow between said tank and said tube.
Claim 6
Dependent Claim
55 words
Continuous vulcanizing apparatus as set forth in claim 1, 2 or 3 further comprising means for optionally interconnecting said means for circulating said liquid and said means for circulating said gas whereby in the absence of liquid in said vulcanizing section, said gas can be circulated through both said vulcanizing section and said cooling section.
Claim 7
Dependent Claim
22 words
Continuous vulcanizing apparatus as set forth in claim 1 or 2 further comprising means for heating the vulcanizing section of said tube.
Claim 8
Dependent Claim
242 words
Continuous vulcanizing apparatus comprising a closed tube having a vulcanizing section in series with a cooling section, the vulcanizing section having the shape of a catenary arc with the convex side thereof facing downwardly and with portions on opposite sides of the peak of the arc at the same level and the cooling section being rectilinear and disposed with its axis extending upwardly and tangent to the axis of the vulcanizing section at the one end of the latter adjoining the cooling section, said vulcanizing section having a heated, non-aqueous liquid under pressure therein and the surface of the liquid at said one end of the vulcanizing section being substantially the same as the surface level of the liquid at the opposite end of said vulcanizing section, a cooling, inert pressurized gas in said cooling section, said one end of said vulcanizing section being open to said cooling section to permit said gas to contact the surface of said liquid at said one end of said vulcanizing section, means connected to said vulcanizing section for circulating said liquid in said vulcanizing section, means connected to said cooling section for circulating said gas in said cooling section, means for supplying a conductor with material thereon to be vulcanized into said tube at said opposite end thereof, and means for removing said conductor from said tube at the end of said cooling section remote from said vulcanizing section after said material has been vulcanized.
Claim 9
Dependent Claim
242 words
Continuous vulcanizing apparatus comprising a closed tube having a vulcanizing section in series with a cooling section, the vulcanizing section having the shape of a catenary arc with the convex side thereof facing downwardly and with portions on opposite sides of the peak of the arc at the same level and the cooling section being rectilinear and disposed with its axis extending upwardly and tangent to the axis of the vulcanizing section at the one end of the latter adjoining the cooling section, said vulcanizing section having a heated, non-aqueous liquid under pressure therein and the surface of the liquid at said one end of the vulcanizing section being substantially the same as the surface level of the liquid at the opposite end of said vulcanizing section, a cooling, inert pressurized gas in said cooling section, said one end of said vulcanizing section being open to said cooling section to permit said gas to contact the surface of said liquid at said one end of said vulcanizing section, means connected to said vulcanizing section for circulating said liquid in said vulcanizing section, means connected to said cooling section for circulating said gas in said cooling section, means for supplying a conductor with material thereon to be vulcanized into said tube at said opposite end thereof, and means for removing said conductor from said tube at the end of said cooling section remote from said vulcanizing section after said material has been vulcanized.
Claim 10
Dependent Claim
30 words
Continuous vulcanizing apparatus as set forth in claim 7 further comprising a pressurized inert gas in said tube at said opposite end of said vulcanizing section and contacting said liquid.
Claim 11
Dependent Claim
32 words
Continuous vulcanizing apparatus as set forth in claim 8 further comprising means connected to the vulcanizing section of said tube for maintaining the liquid in said vulcanizing section at a predetermined level.
Claim 12
Dependent Claim
30 words
Continuous vulcanizing apparatus as set forth in claim 7 or 8 further comprising means for circulating a cooling gas in said vulcanizing section in the absence of said liquid therein.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |