FI872792A - SECONDARY TABLE CONSTRUCTION FOER OPTICAL CABLE SAMT FOERFARANDE FOER TILLVERKNING AV DENSAMMA. - Google Patents

SECONDARY TABLE CONSTRUCTION FOER OPTICAL CABLE SAMT FOERFARANDE FOER TILLVERKNING AV DENSAMMA. Download PDF

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Publication number
FI872792A
FI872792A FI872792A FI872792A FI872792A FI 872792 A FI872792 A FI 872792A FI 872792 A FI872792 A FI 872792A FI 872792 A FI872792 A FI 872792A FI 872792 A FI872792 A FI 872792A
Authority
FI
Finland
Prior art keywords
tube
foer
fibres
secondary casing
densamma
Prior art date
Application number
FI872792A
Other languages
Finnish (fi)
Other versions
FI872792A0 (en
FI86481C (en
FI86481B (en
Inventor
Timo Raesaenen
Martti Puoskari
Teuvo Paeivinen
Jussi Ravela
Original Assignee
Nokia Oy Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Oy Ab filed Critical Nokia Oy Ab
Priority to FI872792A priority Critical patent/FI86481C/en
Publication of FI872792A0 publication Critical patent/FI872792A0/en
Publication of FI872792A publication Critical patent/FI872792A/en
Application granted granted Critical
Publication of FI86481B publication Critical patent/FI86481B/en
Publication of FI86481C publication Critical patent/FI86481C/en

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  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

The invention concerns a secondary casing construction for optical cables. The secondary casing construction comprises a secondary casing tube 1 within which lie optical fibres 3 in fibre channels 2.1 - 2.5, whereby the tube encloses the fibres with room to spare to allow for axial movement between the fibres and the tube. One problem with the present design of secondary casings is that, in this connection, it is not possible to achieve a reliable, simple method of producing the cable and, at the same time, ensure a construction which would provide plenty of room for the optical fibres to move within the tube without risk of compression, or of failing to reach their minimum bend radii. This problem has, in the secondary casing construction according to the invention, been solved such that at least one of the fibre channels 2.1 - 2.5 passing through the tube 1 twists forwards spiral fashion in the tube's longitudinal direction, and at any given tube cross section will lie assymetrically in relation to the tube's central axis A. <IMAGE>
FI872792A 1987-06-23 1987-06-23 SECONDARY CABLE STRUCTURE FOER OPTICAL CABLE SAMT FOERFARANDE FOER TILLVERKNING AV DENSAMMA. FI86481C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI872792A FI86481C (en) 1987-06-23 1987-06-23 SECONDARY CABLE STRUCTURE FOER OPTICAL CABLE SAMT FOERFARANDE FOER TILLVERKNING AV DENSAMMA.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI872792A FI86481C (en) 1987-06-23 1987-06-23 SECONDARY CABLE STRUCTURE FOER OPTICAL CABLE SAMT FOERFARANDE FOER TILLVERKNING AV DENSAMMA.
FI872792 1987-06-23

Publications (4)

Publication Number Publication Date
FI872792A0 FI872792A0 (en) 1987-06-23
FI872792A true FI872792A (en) 1989-04-14
FI86481B FI86481B (en) 1992-05-15
FI86481C FI86481C (en) 1992-08-25

Family

ID=8524716

Family Applications (1)

Application Number Title Priority Date Filing Date
FI872792A FI86481C (en) 1987-06-23 1987-06-23 SECONDARY CABLE STRUCTURE FOER OPTICAL CABLE SAMT FOERFARANDE FOER TILLVERKNING AV DENSAMMA.

Country Status (1)

Country Link
FI (1) FI86481C (en)

Also Published As

Publication number Publication date
FI872792A0 (en) 1987-06-23
FI86481C (en) 1992-08-25
FI86481B (en) 1992-05-15

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Legal Events

Date Code Title Description
FG Patent granted

Owner name: OY NOKIA AB

MA Patent expired