US4155963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In-line manufacture of optical fibres cables with sequential laying
Assignee: Lignes Telegraphiques et Telephoniques LTT SA
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Filing: 1978-04-19
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Granted: 1979-05-22
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Expires: 1998-04-19
Abstract
Abstract A cable comprising a central armour, a dielectric helically grooved core and optical fibres housed in said grooves which are formed with a lip protruding from one edge is produced by extrusion of the profiled core on the armour heating of the core, laying of one fibre within one groove with the aid of a fibre guide controlled by a positioning slot in said core, bending the lip to close the groove outwardly and repeating said heating, laying, etc. . . for each fibre and taping the structure.
Inventors
- 👤 Michel DE Vecchis
- 👤 Maurice Arnaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:50
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4479; G02B6/449; G02B6/4491; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/12; B29C48/25; B29C48/30; B29C48/304; B29C70/00; B29C70/68; B29C70/82; G02B6/4489; B29C48/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
Process for in-line production of cable elements comprising optical fibres, consisting of a rigid armour surrounded by a helically grooved core with optical fibres laid lengthwise in the grooves, characterized by the following steps: (1) slowly rotating and taking off the rigid armour (2) extruding around the armour a plastic material core with a grooved profile, of which at least some of the edges are prolonged by a lip, (3) cooling the extruded core (4) heating the extruded core (5) laying an optical fibre into a groove through a movable fibre guide (6) heating ofthe lip of the edge or edges of the groove according to step 5 (7) turning down of the lip or lips at the periphery of the groove occupied by the fibre for the purpose of closing the access thereto (8) repetition of steps 4, 5, 6 and 7 on the successive grooves (9) winding on to a take-up reel.
Claim 2
Dependent Claim
154 words
Process for in-line production of cable elements comprising optical fibres, consisting of a rigid armour surrounded by a helically grooved core with optical fibres laid lengthwise in the grooves, characterized by the following steps: (1) slowly rotating and taking off the rigid armour (2) extruding around the armour a plastic material core with a grooved profile, of which at least some of the edges are prolonged by a lip, (3) cooling the extruded core (4) heating the extruded core (5) laying an optical fibre into a groove through a movable fibre guide (6) heating ofthe lip of the edge or edges of the groove according to step 5 (7) turning down of the lip or lips at the periphery of the groove occupied by the fibre for the purpose of closing the access thereto (8) repetition of steps 4, 5, 6 and 7 on the successive grooves (9) winding on to a take-up reel.
Claim 3
Dependent Claim
18 words
Process according to claim 1, wherein a single lip is heated after the laying of an optical fibre.
Claim 4
Dependent Claim
25 words
Process according to claim 1, wherein two lips adjacent to the groove receiving the optical fibre are simultaneously heated after the laying of the fibre.
Claim 5
Dependent Claim
16 words
Process according to claim 1, wherein units for the laying of the optical fibre are equidistant.
Claim 6
Dependent Claim
34 words
Process according to claim 1, wherein the heating of the lips and the turning down thereof are effected by means of a heating disc which has a recess over a part of its height.
Claim 7
Dependent Claim
30 words
Process according to claim 1, wherein the movable fibre guide is a capillary tube disposed in the groove and extending beyond the beginning of the turned down lip or lips.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |