← Back to Patent Explorer
EP0034286A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process and device for manufacturing a waterproof fibre-optical cable

Assignee: Lyonnaise de Transmissions Optiques Cie
•
Filing: 1981-01-30
•
Granted: —
•
Expires: 2001-01-30
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Translated from French Procédé de fabrication d'un câble à fibres optiques comprenant au moins une structure cylindrique (2, 3, 4 --) dans laquelle les fibres (8) sont logées dans des alvéoles (9) entourés par une gaine en matériau plastique et remplis d'un matériau visqueux. On introduit des fibres optiques dans des tubes interrompus sur une certaine longueur, on injecte un matériau visqueux sous pression dans lesdits tubes, de façon que ledit matériau visqueux vienne remplir les tubes autour des fibres optiques, on fait sortir les fibres optiques entourées de matériau visqueux à l'extrémité desdits tubes, on extrude simultanément autour de celles-ci par un orifice annulaire un matériau thermoplastique sous une pression suffisante pour noyer complètement lesdites fibres entourées de matériau visqueux, et on refroidit rapidement la structure cylindrique ainsi obtenue. Method for manufacturing a fiber optic cable comprising at least one cylindrical structure (2, 3, 4 -) in which the fibers (8) are housed in cells (9) surrounded by a sheath of plastic material and filled with 'a viscous material. Optical fibers are introduced into tubes interrupted over a certain length, a viscous material is injected under pressure into said tubes, so that said viscous material comes to fill the tubes around the optical fibers, the optical fibers surrounded by viscous material are taken out at the end of said tubes, a thermoplastic material is simultaneously extruded around them by an annular orifice under a pressure sufficient to completely drown said fibers surrounded by viscous material, and the cylindrical structure thus obtained is rapidly cooled.

Inventors

  • 👤 Bernard Grenat

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 22:35
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4479; G02B6/4483; B; B29; B29C; B29C48/00; B29C48/03; B29C48/06; B29C48/15; B29C48/156; B29C48/25; B29C48/30; B29C48/32; B29C48/34; G02B6/4486

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

DE2604307A1 Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag