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US4583929A
Expired / Lapsed
US
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Apparatus for manufacturing an optical cable element
Assignee: US Philips Corp
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Filing: 1984-02-22
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Granted: 1986-04-22
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Expires: 2004-02-22
Abstract
Abstract A method of manufacturing an optical cable element in which a synthetic resin envelope is extruded around one or more optical fibers at elevated temperature. The element is then cooled and wound on a reel in which, after cooling, the element is again heated and maintained (tempered) at the heating temperature to irreversibly shrink the synthetic resin envelope.
Inventors
- 👤 Johann A. Becker
- 👤 Werner Zell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:12
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4479; B; B29; B29C; B29C48/00; B29C48/03; B29C48/06; B29C48/25; B29C48/88; B29C48/885; B29C48/91; B29C48/919; B29C53/00; B29C53/02; B29C53/12; B29C71/00; B29C71/02; B29D; B29D11/00; B29D11/00865; B29D11/00875; G02B6/4439; G02B6/4457; G02B6/4484; B29C48/05; B29L; B29L2011/00; B29L2011/0075
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A device for manufacturing an optical cable element, said device comprising: an extruder for extruding a synthetic resin envelope around an optical fiber, said extruder extruding the envelope at an elevated temperature and at an extrusion velocity; a cooling bath for cooling the extruded synthetic resin envelope; a furnace having a heating zone for heating the fiber and cooled envelope to a tempering temperature; and means for passing the fiber and envelope through the heating zone at a tempering velocity which is substantially less than the extrusion velocity; characterized in that the means for passing the fiber and envelope through the heating zone comprises: a drum having an axis; means for winding the fiber and envelope on the drum around the drum axis; and means for moving the drum through the heating zone in the direction of the drum axis.
Claim 2
Independent Claim
140 words
A device for manufacturing an optical cable element, said device comprising: an extruder for extruding a synthetic resin envelope around an optical fiber, said extruder extruding the envelope at an elevated temperature and at an extrusion velocity; a cooling bath for cooling the extruded synthetic resin envelope; a furnace having a heating zone for heating the fiber and cooled envelope to a tempering temperature; and means for passing the fiber and envelope through the heating zone at a tempering velocity which is substantially less than the extrusion velocity; characterized in that the means for passing the fiber and envelope through the heating zone comprises: a drum having an axis; means for winding the fiber and envelope on the drum around the drum axis; and means for moving the drum through the heating zone in the direction of the drum axis.
Claim 3
Dependent Claim
25 words
A device as claimed in claim 1, characterized in that the ratio of the extrusion velocity to the tempering velocity is from 100 to 1000.
Claim 4
Dependent Claim
31 words
A device as claimed in claim 2, characterized in that the synthetic resin has a softening temperature, and the tempering temperature is just below the softening temperature of the synthetic resin.
Claim 5
Dependent Claim
26 words
A device as claimed in claim 2, characterized in that the drum comprises a layer of compressible material on which the fiber and envelope are wound.
Claim 6
Dependent Claim
23 words
A device as claimed in claim 4, characterized in that compressible material is provided between layers of enveloped fiber wound on the drum.
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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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |