Patent US4594766A successfully refreshed from Google Patents.
US4594766A
Expired / Lapsed
US
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Optical fiber cables having improved hermeticity
Assignee: Olin Corp
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Filing: 1985-02-25
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Granted: 1986-06-17
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Expires: 2005-02-25
Abstract
Abstract The present invention relates to a process and apparatus for fabricating optical fiber cables having improved hermeticity. The optical fiber cables are formed by first reducing the water content of the buffer material surrounding each optical fiber. Thereafter, the dried optical fiber(s) are encapsulated into a metal or metal alloy tube. After fiber encapsulation, the tube may be sealed to prevent the ingress of moisture and/or water from the surrounding environment.
Inventors
- 👤 Warren F. Smith, Jr.
- 👤 Eugene Shapiro
- 👤 Joseph Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:43
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4479; G02B6/4486; G02B6/4488; G02B6/4401; G02B6/4415; G02B6/4427; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49888
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
53 words
A process for fabricating an optical fiber communication cable, said process comprising: providing at least one optical fiber having a buffer material; drying each said optical fiber so as to reduce the water content of said buffer material; and encapsulating said at least one optical fiber in a metal or metal alloy tube.
Claim 2
Dependent Claim
53 words
A process for fabricating an optical fiber communication cable, said process comprising: providing at least one optical fiber having a buffer material; drying each said optical fiber so as to reduce the water content of said buffer material; and encapsulating said at least one optical fiber in a metal or metal alloy tube.
Claim 3
Dependent Claim
50 words
The process of claim 1 wherein said encapsulating step comprises: providing a continuous length metal or metal alloy strip and at least one tube forming die; pulling said strip through said at least one die to form said tube; and inserting said at least one fiber into said forming tube.
Claim 4
Dependent Claim
15 words
The process of claim 2 further comprising: sealing said tube to provide a hermetic assembly.
Claim 5
Dependent Claim
35 words
The process of claim 3 wherein said sealing step comprises: passing said tube and said at least one encapsulated fiber through a molten sealing material to form a thin, substantially uniform coating about said tube.
Claim 6
Dependent Claim
20 words
The process of claim 3 further comprising: forming at least one non-metallic layer about said tube after said sealing step.
Claim 7
Dependent Claim
82 words
A process for fabricating an optical fiber communication cable, said process comprising: providing at least one optical fiber having a buffer material; drying each said optical fiber in an atmosphere having a dew point less than about 0° F. at a temperature in the range of about 20° C. to about 100° C. for a time in the range of about 3 hours to about 60 hours; and encapsulating said at least one optical fiber in a metal or metal alloy tube.
Claim 8
Dependent Claim
82 words
A process for fabricating an optical fiber communication cable, said process comprising: providing at least one optical fiber having a buffer material; drying each said optical fiber in an atmosphere having a dew point less than about 0° F. at a temperature in the range of about 20° C. to about 100° C. for a time in the range of about 3 hours to about 60 hours; and encapsulating said at least one optical fiber in a metal or metal alloy tube.
Claim 9
Dependent Claim
73 words
A process for fabricating an optical fiber communication cable, said process comprising: providing at least one optical fiber having a buffer material; drying each said optical fiber in a vacuum at a temperature in the range of about 20° C. to about 100° C. for a time in the range of about 3 hours to about 100 hours; and encapsulating said at least one optical fiber in a metal or metal alloy tube.
Claim 10
Dependent Claim
73 words
A process for fabricating an optical fiber communication cable, said process comprising: providing at least one optical fiber having a buffer material; drying each said optical fiber in a vacuum at a temperature in the range of about 20° C. to about 100° C. for a time in the range of about 3 hours to about 100 hours; and encapsulating said at least one optical fiber in a metal or metal alloy tube.
Claim 11
Dependent Claim
77 words
A process for fabricating an optical fiber communication cable, said process comprising: providing at least one optical fiber having a buffer material; drying each said optical fiber in a furnace having a vacuum at a temperature in the range of about 20° C. to about 60° C. for a time period in the range of about 5 hours to about 50 hours; and encapsulating said at least one optical fiber in a metal or metal alloy tube.
Claim 12
Dependent Claim
77 words
A process for fabricating an optical fiber communication cable, said process comprising: providing at least one optical fiber having a buffer material; drying each said optical fiber in a furnace having a vacuum at a temperature in the range of about 20° C. to about 60° C. for a time period in the range of about 5 hours to about 50 hours; and encapsulating said at least one optical fiber in a metal or metal alloy tube.
Claim 13
Dependent Claim
78 words
A process for fabricating an optical fiber communication cable, said process comprising: providing at least one optical fiber having a buffer material; drying each said optical fiber in a furnace having an atmosphere with a dewpoint less than about -50° F. at a temperature in the range of about 30° C. to about 60° C. for about 5 hours to about 50 hours; and encapsulating said at least one optical fiber in a metal or metal alloy tube.
Claim 14
Dependent Claim
78 words
A process for fabricating an optical fiber communication cable, said process comprising: providing at least one optical fiber having a buffer material; drying each said optical fiber in a furnace having an atmosphere with a dewpoint less than about -50° F. at a temperature in the range of about 30° C. to about 60° C. for about 5 hours to about 50 hours; and encapsulating said at least one optical fiber in a metal or metal alloy tube.
Claim 15
Independent Claim
57 words
An apparatus for fabricating an optical fiber communication cable, said apparatus comprising: means for subjecting at least one optical fiber having a buffer material to a drying treatment for reducing the water content of said buffer material; and means for encapsulating said at least one optical fiber into a metal or metal alloy tube after said treatment.
Claim 16
Independent Claim
57 words
An apparatus for fabricating an optical fiber communication cable, said apparatus comprising: means for subjecting at least one optical fiber having a buffer material to a drying treatment for reducing the water content of said buffer material; and means for encapsulating said at least one optical fiber into a metal or metal alloy tube after said treatment.
Claim 17
Dependent Claim
44 words
The apparatus of claim 10 further comprising: said encapsulating means including at least one die for forming a continuous length of metal or metal alloy strip into said tube; and means for inserting said at least one dried optical fiber into said forming tube.
Claim 18
Dependent Claim
17 words
The apparatus of claim 11 further comprising: means for sealing said tube to provide a hermetic assembly.
Claim 19
Dependent Claim
29 words
The apparatus of claim 12 wherein said sealing means comprises a bath of molten sealing material through which said tube and said at least one encapsulated fiber are drawn.
Claim 20
Dependent Claim
14 words
The apparatus of claim 12 wherein said sealing means comprises a wave soldering apparatus.
Claim 21
Dependent Claim
18 words
The apparatus of claim 12 further comprising: means for fabricating at least one external layer about said tube.
Claim 22
Dependent Claim
42 words
The apparatus of claim 12 wherein said encapsulating means further comprises: means for applying a tensile force to said strip and said at least one fiber to pull said strip and said at least one fiber through said at least one die.
Claim 23
Dependent Claim
16 words
The apparatus of claim 10 wherein said water content reducing means comprises a fiber drying device.
Claim 24
Dependent Claim
12 words
The apparatus of claim 17 wherein said drying device comprises a furnace.
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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) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |