GB2139779A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Optical fibre cables
Assignee: STC PLC
•
Filing: 1983-05-10
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Granted: —
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Expires: 2003-05-10
Abstract
Abstract An optical fibre cable element comprises two optical fibres (1), each having a double-layer on-line coating and is suitable for high temperature, up to 100 DEG C, applications if the coating material comprises, for example, UV epoxy acrylate resin. The innermost layer is of a softer grade than the outer layer; the two layers being applied in tandem. The coated optical fibres are stranded round, or otherwise assembled relative to, a central member (4) together with filler elements (2) and the unit thus produced held together by a heat-resistant tape (4) wrapping. A sheath (6) with or without a strength member layer (5) may be disposed over the tape (4). The fillers (2) may also comprise double-layer on-line coated optical fibres if required. <IMAGE>
Inventors
- 👤 Mahesh Kumar Ramniklal Vyas
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-25 16:53
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/4436
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
14 words
An optical fibre cable element comprising an optical fibre having a double-layer on-line coating.
Claim 2
Dependent Claim
14 words
An optical fibre cable element comprising an optical fibre having a double-layer on-line coating.
Claim 3
Dependent Claim
20 words
A cable element as claimed in claim 1,wherein one layer of the double layer is softer than the other layer.
Claim 4
Dependent Claim
28 words
A cable element as claimed in claim 2, wherein the coating is comprised of a UV epoxy acrylate resin, the inner layer being softer than the outer layer.
Claim 5
Dependent Claim
35 words
A cable element as claimed in claim 2, wherein the one layer is comprised of silicone rubber or silicone resin and the other layer is comprised of UV epoxy acrylate resin, or a thermosetting material.
Claim 6
Dependent Claim
25 words
A cable comprising a cable element as claimed in any one of the preceding claims assembled together with other members relative to a central member.
Claim 7
Dependent Claim
22 words
A cable as claimed in claim 5 wherein said cable element is stranded together with said other members around said central member.
Claim 8
Dependent Claim
27 words
A cable as claimed in claim 5 wherein said cable element and said other members are substantially parallel laid in loose form relative to said central member.
Claim 9
Dependent Claim
24 words
A cable as claimed in any one of claims 5 to 7 wherein the element and members are wrapped with a heat stabilised tape.
Claim 10
Dependent Claim
25 words
A cable as claimed in claim 8, wherein the heat stabilised tape is comprised of polyether-ether ketone, polyether sulphone orfluorinated ethene propene coated Kapton polyamide.
Claim 11
Dependent Claim
18 words
A cable as claimed in claim 8 or claim 9, including a sheath over the heat stabilised tape.
Claim 12
Dependent Claim
16 words
A cable as claimed in claim 10, wherein the sheath comprises or includes a strength member.
Claim 13
Dependent Claim
20 words
A cable as claimed in any one of claims 5 to 11, wherein the central member comprises a strength member.
Claim 14
Dependent Claim
24 words
A cable as claimed in any one of claims 5 to 12, wherein the other members comprise optical fibres having a double-layer on-line coating.
Claim 15
Independent Claim
32 words
A method of manufacturing an optical fibre cable element comprising on-line coating a bare optical fibre in two coating operations in tandem whereby to provide a double layer on-line coated optical fibre.
Claim 16
Independent Claim
32 words
A method of manufacturing an optical fibre cable element comprising on-line coating a bare optical fibre in two coating operations in tandem whereby to provide a double layer on-line coated optical fibre.
Claim 17
Dependent Claim
57 words
A method as claimed in claim 14, wherein in a first coating operation the bare optical fibre is coated with a first layer comprising a relatively soft grade of a polymeric resin and wherein in a second coating operation the first layer is coated with a second layer comprising a relatively hard grade of a polymeric resin.
Claim 18
Dependent Claim
21 words
A method as claimed in claim 15, wherein the first and second layers are comprised of a UV epoxy acrylate resin.
Claim 19
Dependent Claim
22 words
A method as claimed in claim 14, wherein one layer is comprised of a UV epoxy acrylate resin or a thermosetting material.
Claim 20
Independent Claim
38 words
A method of manufacturing a cable comprising assembling at least optical fibre cable element as claimed in any one of claims 1 to 4 with other members relative to a central member whereby to form a core unit.
Claim 21
Dependent Claim
20 words
A method as claimed in claim 18, including the step of wrapping the core unit with a heat stabilised tape.
Claim 22
Dependent Claim
19 words
A method as claimed in claim 19, including the step of providing a sheath over the heat stabilised tape.
Claim 23
Dependent Claim
31 words
A method as claimed in claim 20, wherein the sheath providing step includes providing a strength member layer on the tape and extruding a plastics sheath over the strength member layer.
Claim 24
Dependent Claim
63 words
An optical fibre cable for operation at high temperatures, e.g. above 50"C, comprising at least one optical fibre assembled together with other members to form a unit, the unit being arranged within an outer sheath, and including a layer, disposed between the optical fibre and the outer sheath, which serves to minimise the effects of stress on the fibre due to temperature change.
Claim 25
Dependent Claim
63 words
An optical fibre cable for operation at high temperatures, e.g. above 50"C, comprising at least one optical fibre assembled together with other members to form a unit, the unit being arranged within an outer sheath, and including a layer, disposed between the optical fibre and the outer sheath, which serves to minimise the effects of stress on the fibre due to temperature change.
Claim 26
Dependent Claim
20 words
A cable as claimed in claim 22, wherein the unit is wrapped with a heat stabilised tape comprising said layer.
Claim 27
Dependent Claim
26 words
A cable as claimed in claim 23, wherein the heat stabilised tape is comprised of polyether-ether ketone, polyether sulphone or fluorinated ethene propene coated kapton polyamide.
Claim 28
Dependent Claim
22 words
A cable as claimed in claim 22, wherein the optical fibre is provided with a double layer on-line coating comprising said layer.
Claim 29
Dependent Claim
20 words
A cable as claimed in claim 25, wherein one layer of the double layer is softer than the other layer.
Claim 30
Dependent Claim
30 words
A cable as claimed in claim 25 or claim 26, wherein the coating is comprised of a UV epoxy acrylate resin, the inner layer being softer than the outer layer.
Claim 31
Dependent Claim
16 words
An optical fibre element or cable substantially as herein described with reference to the accompanying drawing.
Claim 32
Dependent Claim
16 words
An optical fibre element or cable substantially as herein described with reference to the accompanying drawing.
Claim 33
Independent Claim
20 words
A method of manufacturing an optical fibre cable or element substantially as herein described with reference to the accompanying drawing.
Claim 34
Independent Claim
20 words
A method of manufacturing an optical fibre cable or element substantially as herein described with reference to the accompanying drawing.
References Cited (Backward Citations)
GB1569905A
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GB2016731A
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GB2065324A
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EP0034670A1
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GB2086607A
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GB2109581A
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