US3901633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuously vulcanizing materials in the presence of hydrogen or helium
Assignee: ANACONDA ACQUISITION Co
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Filing: 1974-05-03
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Granted: 1975-08-26
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Expires: 1994-05-03
Abstract
Abstract Method and apparatus are disclosed for continuously vulcanizing a polymeric strand such as a covering on an electrical conductor by passing the strand through a vulcanizing chamber containing helium or hydrogen under pressure and transmitting vulcanizing heat to the strand by conduction through such gas.
Inventors
- 👤 Willis L Chrisman
- 👤 John D Stauffer
- 👤 Jr Edwin H Arnaudin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:51
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/04; B29C35/06; B29C35/065; B29C48/00; B29C48/15; H; H01; H01B; H01B13/00; H01B13/06; H01B13/14; B29C48/03; B29C48/05; B29C48/06; B29K; B29K2021/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
APPARATUS FOR VULCANIZING POLYMERIC COVERINGS AND THE LIKE ON AN ELECTRIC CABLE COMPRISING A TUBE FORMING A VULCANIZING CHAMBER, A PRESSURIZED SOURCE OF A GAS SELECTED FROM THE GROUP CONSISTING OF HELIUM AND HYDROGEN, A GAS INLET TO SAID CHAMBER CONNECTED TO SAID SOURCE OF GAS, SAID CHAMBER BEING MAINTAINED FILLED WITH SAID GAS UNDER PRESSURE, AN EXTRUDER HEAD IN SEALED RELATION TO AND AT ONE END OF SAID CHAMBER FOR CONTINUOUSLY EXTRUDING A COVERING ON SAID CABLE AND FOR CONTINUOUSLY FEEDING THE COVERED CABLE INTO SAID GAS-FILLED CHAMBER, HEATING MEANS EXTERIOR TO AND SUBSTANTIALLY SURROUNDING SAID CHAMBER FOR HEATING SAID COVERED CABLE BY CONDUCTION THROUGH SAID GAS AND MEANS DOWNSTREAM OF SAID CHAMBER TO PERMIT EGRESS OF SAID CABLE CONTINUOUSLY THEREFROM WHILE SEALING THE CHAMBER.
Claim 2
Dependent Claim
126 words
APPARATUS FOR VULCANIZING POLYMERIC COVERINGS AND THE LIKE ON AN ELECTRIC CABLE COMPRISING A TUBE FORMING A VULCANIZING CHAMBER, A PRESSURIZED SOURCE OF A GAS SELECTED FROM THE GROUP CONSISTING OF HELIUM AND HYDROGEN, A GAS INLET TO SAID CHAMBER CONNECTED TO SAID SOURCE OF GAS, SAID CHAMBER BEING MAINTAINED FILLED WITH SAID GAS UNDER PRESSURE, AN EXTRUDER HEAD IN SEALED RELATION TO AND AT ONE END OF SAID CHAMBER FOR CONTINUOUSLY EXTRUDING A COVERING ON SAID CABLE AND FOR CONTINUOUSLY FEEDING THE COVERED CABLE INTO SAID GAS-FILLED CHAMBER, HEATING MEANS EXTERIOR TO AND SUBSTANTIALLY SURROUNDING SAID CHAMBER FOR HEATING SAID COVERED CABLE BY CONDUCTION THROUGH SAID GAS AND MEANS DOWNSTREAM OF SAID CHAMBER TO PERMIT EGRESS OF SAID CABLE CONTINUOUSLY THEREFROM WHILE SEALING THE CHAMBER.
Claim 3
Dependent Claim
105 words
Apparatus for continuously extruding and curing an advancing polymeric strand comprising an extrusion head for said strand, a tube extending downstream directly from said head, a substantially unchanging body of gas selected from the group consisting of helium and hydrogen filling said tube around said strand, means for maintaining said gas at superatmospheric pressure, a heating jacket surrounding said tube, means continuously circulating a heating fluid through said jacket at essentially ambient pressure, and means external to said jacket heating said fluid to a temperature sufficient for rapidly curing said strand, said gas conveying heat by conduction through said body of gas to said strand.
Claim 4
Dependent Claim
105 words
Apparatus for continuously extruding and curing an advancing polymeric strand comprising an extrusion head for said strand, a tube extending downstream directly from said head, a substantially unchanging body of gas selected from the group consisting of helium and hydrogen filling said tube around said strand, means for maintaining said gas at superatmospheric pressure, a heating jacket surrounding said tube, means continuously circulating a heating fluid through said jacket at essentially ambient pressure, and means external to said jacket heating said fluid to a temperature sufficient for rapidly curing said strand, said gas conveying heat by conduction through said body of gas to said strand.
Claim 5
Dependent Claim
81 words
Apparatus for vulcanizing a polymeric covering on an electric cable comprising a tube forming a vulcanizing chamber, means for maintaining a gas selected from the group consisting of helium and hydrogen under relatively high pressure in said chamber, jacket means exterior to and surrounding said chamber, means for circulating a hot fluid through said jacket to heat said gas, and means for passing a cable having a polymeric covering through said chamber while maintaining said gas in an essentially stagnant condition.
Claim 6
Dependent Claim
81 words
Apparatus for vulcanizing a polymeric covering on an electric cable comprising a tube forming a vulcanizing chamber, means for maintaining a gas selected from the group consisting of helium and hydrogen under relatively high pressure in said chamber, jacket means exterior to and surrounding said chamber, means for circulating a hot fluid through said jacket to heat said gas, and means for passing a cable having a polymeric covering through said chamber while maintaining said gas in an essentially stagnant condition.
Claim 7
Dependent Claim
10 words
Apparatus according to claim 3 wherein said gas is helium.
References Cited (Backward Citations)
US3130447A
Cited
US3513228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |