CA2027369C - Aerial optical fibre cable - Google Patents
Aerial optical fibre cableInfo
- Publication number
- CA2027369C CA2027369C CA002027369A CA2027369A CA2027369C CA 2027369 C CA2027369 C CA 2027369C CA 002027369 A CA002027369 A CA 002027369A CA 2027369 A CA2027369 A CA 2027369A CA 2027369 C CA2027369 C CA 2027369C
- Authority
- CA
- Canada
- Prior art keywords
- rod
- strength member
- cable
- optical fibre
- imprint
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 239000004020 conductor Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 12
- 229920005989 resin Polymers 0.000 description 12
- 239000011521 glass Substances 0.000 description 10
- 230000000903 blocking effect Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 239000003000 extruded plastic Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
- G02B6/4422—Heterogeneous cables of the overhead type
Abstract
An all-dielectric optical fibre cable comprises a strength member rod (1) having a roughened surface (1A) formed by a moulding process during manufacture of the rod using a woven tape imprint, which serves to improve adhesion between an extruded outer sheath (7) and the surface (1A) of the rod (1). The cable is suitable as an all dielectric aerial cable for large unsupported spans eg 500M, alongside a high voltage electricity distribution system.
Description
W J ~ 3 ~
AERIAL OPTICAL FIBRE CABLE
This invention relates to an aerial optical fibre cable, particularly but not exclusively one that has no metallic components.
Our published European patent application No 0216548 discloses an all-dielectric aerial optical fibre cable in which the strength member comprises a rod-like member of pultruded glass reinforced plastics material and having a slot accommodating the optical fibres.
.
This strength member is tightly surrounded by an extruded plastic sheath and there may be an intermediate winding of tape or cord around the strength member prior to eXtrusion of the sheath.
In use, this cable is supported from pylons along with but spaced from the high tension electrical conductors for the purpose of providing a telecommunications link. The cable has the advantage of being able to be installed without the need for shutting down the high tension transmission because it is an all-dielectric cable.
Our European Application 0278648 discloses an all dlelectric aerial optical fibre cable similar to our earlier patent discussed above and wherein the slot is filled with a water blocking compound and a slot cap is applied over the slot after it has been filled with water blocking compound, to close the slot, and the excess of water blocking compound is wiped cleanly away from the surface of the pultruded glass reinforced plastics rod.
:~:
AERIAL OPTICAL FIBRE CABLE
This invention relates to an aerial optical fibre cable, particularly but not exclusively one that has no metallic components.
Our published European patent application No 0216548 discloses an all-dielectric aerial optical fibre cable in which the strength member comprises a rod-like member of pultruded glass reinforced plastics material and having a slot accommodating the optical fibres.
.
This strength member is tightly surrounded by an extruded plastic sheath and there may be an intermediate winding of tape or cord around the strength member prior to eXtrusion of the sheath.
In use, this cable is supported from pylons along with but spaced from the high tension electrical conductors for the purpose of providing a telecommunications link. The cable has the advantage of being able to be installed without the need for shutting down the high tension transmission because it is an all-dielectric cable.
Our European Application 0278648 discloses an all dlelectric aerial optical fibre cable similar to our earlier patent discussed above and wherein the slot is filled with a water blocking compound and a slot cap is applied over the slot after it has been filled with water blocking compound, to close the slot, and the excess of water blocking compound is wiped cleanly away from the surface of the pultruded glass reinforced plastics rod.
:~:
- 2 - ~J'~
We have found it is important to remo~e as far as possible any excess water blocking compound as this tends to prevent the outer sheath firmly gripping the rod-like strength member. As shown in this patent specification we have provided a binding around the strength member and the slot cap both to hold the slot cap in position and also to provide a frictional interface between the sheath and the strength member.
However we have experienced a certain amount of decoupling between the strength member and the sheath.
A known arrangement for providing adhesion between an extruded covering and an electrical conductor is shown in US patent 4610909. Here unplasticised particles of PVC resin are coated onto the conductors and the portions of the particles contacting the surfaces of the conductor are melted and degraded and adhere to the surfaces of the conductors, forming a discontinuous coating of adhesion sites. A plasticised PVC resin is extruded over the conductors and a controlled degree of adhesion to the adhesion sites is claimed to occur.
In this arrangement the conductor and strength member are the same component, made of copper-coated steel and therefore very robust. ~owever the dielectric cable of the above-mentioned European patent applications has a dielectric strength member which houses the optical conductors and which would be damaged by the process of degrading particles on the surface.
It is an object of the present invention to provide an alternative solution to this problem, without degrading the strength member.
~ J~
We have found it is important to remo~e as far as possible any excess water blocking compound as this tends to prevent the outer sheath firmly gripping the rod-like strength member. As shown in this patent specification we have provided a binding around the strength member and the slot cap both to hold the slot cap in position and also to provide a frictional interface between the sheath and the strength member.
However we have experienced a certain amount of decoupling between the strength member and the sheath.
A known arrangement for providing adhesion between an extruded covering and an electrical conductor is shown in US patent 4610909. Here unplasticised particles of PVC resin are coated onto the conductors and the portions of the particles contacting the surfaces of the conductor are melted and degraded and adhere to the surfaces of the conductors, forming a discontinuous coating of adhesion sites. A plasticised PVC resin is extruded over the conductors and a controlled degree of adhesion to the adhesion sites is claimed to occur.
In this arrangement the conductor and strength member are the same component, made of copper-coated steel and therefore very robust. ~owever the dielectric cable of the above-mentioned European patent applications has a dielectric strength member which houses the optical conductors and which would be damaged by the process of degrading particles on the surface.
It is an object of the present invention to provide an alternative solution to this problem, without degrading the strength member.
~ J~
- 3 -According to the present invention there is provided an optical fibre cable comprising a dielectric rod-like strength member having a channel which contains an optical conductor, said conductor being protected against longitudinal and transverse stress applied to the strength member, said strength member being encased in an extruded sheath in contact with the surface of the strength member and wherein the surface of the strength member is roughened by moulding an imprint in the surface of the strength member in order to improve the grip between the sheath and the strength member.
Preferably the roughened surface of the strength member is produced during manufacture of the strength member while the strength member is in a soft condition, by impressing a rough surface mould onto the soft strength member so that when the strength member hardens~ the rough surface contour becomes imprinted upon the surface of the strength member. Preferably this is provided by laying a woven tape around the outside of the strength member during manufacture and removing it after the strength member has hardened.
Preferably the strength member comprises glass rovings impregnated with resin to produce a glass reinforced resin strength member with an imprinted roughened surface.
According to another aspect of the invention there is provided a method of mak.ing an optical fibre cable comprising a strength member rod closely embraced by an extruded sheath, the method comprising moulding the surface of the rod while the rod is soft and subse~uently hardening the rod so that the moulded surface configuration remains imprinted in the hardened rod, and extruding a sheath into surface contact with the rod.
: , ~ ~ ~d d~ 3 According to a further aspect of the invention there is provided a strength member for an optical fibre cable, comprising a dielectric rod having an open channel for housing an optical fibre and comprising fibre~reinforded-plastics material, the outer surface of said rod having a roughened surface formed by a moulded imprint in the surface~
Where the strength member is made by a glass reinforced resin rod by a pultrusion process, the surface is effectively "abraded n without damaging the glass rovings. If the glass rovings were damaged, this would seriously impair the strength of the glass reinforced resin rodO
In order that the invention can be clearly understood reference will now be made to the accompanying drawings in which:-Fig 1 shows in cross-section an all dielectric optical fibre aerial cable according to an embodiment of the present invention;
and Fig 2 shows a method of making the strength member of the cable shown in Fig 1.
Referring to Fig 1, a non-electrically conductive rod 1 of homogenous material made from glass-fibre reinforced resin by a poltrusion or similar process, has a rectangular slot 2 with convexly radiused edges 2A and 2B, containing an optical fibre ribbon element 3 in the slot 2. The rod 1 acts as the cable stxength member and the cable armour (having high tensile strength and being highly crush-resistant) and is resilient with a modulus of at least 40,000Nmm2.
~ ~ h ~ ë~ 73 ~3 The slot 2 runs straight along the rod 1 and is relatively shallow, that is to say it is always located to one side of the neutral axis of the cable which is at or close to the geometric centre referenced lA.
The slot 2 is closed by a cap 5 made of extruded plastics material and having concavely radiused edges 5A
and 5B which exactly ~it onto the edges 2A and 2B of the slot 2.
~ The slot 2 is filled with a grease-like : material 8, for example one sold under the brand name SYNTEC Type FCC210S and which is a soft thixotropic water blocking material.
Around the rod 1 and the cap 5 is a binder 6 which is helically wound around and serves to locate the cap 5 in place on the slot Z prior to extrusion of an ' outer sheath 7 and during the induction of an excess length of fibre around a capstan as described in our published patent application 8703255, 8522796 and 8611177.
The rod 1 has a roughened surface lA which improves the adhesion between the sheath 7 and the rod l. It is pointed out that Fig l is not to scale and the binder 6 is helically applied so that most of the surface lA of the rod 1 is in direct contact with the sheath 7.
The configuration of the roughened surface lA
is in the form of moulded dimples produced by a woven tape which has been laid against the outside of the rod during manufacture and while the rod is in its soft state and removing the woven tape after the glass/resin rod substrate has been cured, thereby leaving a :
: , . :: ~: . . .
~ a~
roughened surface produced by a ~moulding~ process. The shape and configuration of the woven tape becomes imprinted in the surface of the rod.
Fig 2 shows in detail how this is achieved.
Referring to Fig 2 the strength member rod 1 is produced by glass rovings 10 carried on bobbins 11 which are drawn into a resin bath 12 beneath a guide roller 13.
The rovings 10, coated with resin~ are drawn through a die 14 together with a peel-ply tape 15 drawn from a supply reel 16.
The tape is applied longitudinally around the impregnated glass rovings as they pass througb the die 14 and into a curing oven 17 where the resin impregnating the glass rovings is cured.
The rod 1 thus produced emerges from the oven covered with the peel-ply tape 15 and is wound onto a take up drum 18. The peel-ply tape can either be removed prior to winding onto the take up drum 18 or alternatively can be left on the rod to be removed when the aerial optical fibre cable shown in Fig 1 is manufactured. It is thus possible to draw the rod from the take up drum 18 during manufacture of the cable and peel off the peel ply tape 15 before the optical fibres and the water blocking compound are introduced into the slot 2.
The mesh size of the peel-ply tape which moulds the roughened surface onto the rod is preferably about O.lmm. However a range of sizes would be suitable from O.Olmm up to l.Omm for a rod having a diameter of around 8 to lOmm as in the present embodiment.
The peel-ply tape 15 is so constructed that it does not adhere strongly to the outer surface of the rod 1 and can therefore be easily peeled away from it~ This is accomplished by making the tape of woven or non-woven mono filament which does not have interstices into ~ .
which the resin could penetrate and form a strong adhesive bond.
We have found that the roughened surface lA on the rod 1 significantly improves adhesion between the extruded sheath 7 and the rod 1 so that during use and over long spans, eg SOOM between pylons, relative longitudinal movement between the rod and the sheath is substantially eliminated.
,.
,~ :
Preferably the roughened surface of the strength member is produced during manufacture of the strength member while the strength member is in a soft condition, by impressing a rough surface mould onto the soft strength member so that when the strength member hardens~ the rough surface contour becomes imprinted upon the surface of the strength member. Preferably this is provided by laying a woven tape around the outside of the strength member during manufacture and removing it after the strength member has hardened.
Preferably the strength member comprises glass rovings impregnated with resin to produce a glass reinforced resin strength member with an imprinted roughened surface.
According to another aspect of the invention there is provided a method of mak.ing an optical fibre cable comprising a strength member rod closely embraced by an extruded sheath, the method comprising moulding the surface of the rod while the rod is soft and subse~uently hardening the rod so that the moulded surface configuration remains imprinted in the hardened rod, and extruding a sheath into surface contact with the rod.
: , ~ ~ ~d d~ 3 According to a further aspect of the invention there is provided a strength member for an optical fibre cable, comprising a dielectric rod having an open channel for housing an optical fibre and comprising fibre~reinforded-plastics material, the outer surface of said rod having a roughened surface formed by a moulded imprint in the surface~
Where the strength member is made by a glass reinforced resin rod by a pultrusion process, the surface is effectively "abraded n without damaging the glass rovings. If the glass rovings were damaged, this would seriously impair the strength of the glass reinforced resin rodO
In order that the invention can be clearly understood reference will now be made to the accompanying drawings in which:-Fig 1 shows in cross-section an all dielectric optical fibre aerial cable according to an embodiment of the present invention;
and Fig 2 shows a method of making the strength member of the cable shown in Fig 1.
Referring to Fig 1, a non-electrically conductive rod 1 of homogenous material made from glass-fibre reinforced resin by a poltrusion or similar process, has a rectangular slot 2 with convexly radiused edges 2A and 2B, containing an optical fibre ribbon element 3 in the slot 2. The rod 1 acts as the cable stxength member and the cable armour (having high tensile strength and being highly crush-resistant) and is resilient with a modulus of at least 40,000Nmm2.
~ ~ h ~ ë~ 73 ~3 The slot 2 runs straight along the rod 1 and is relatively shallow, that is to say it is always located to one side of the neutral axis of the cable which is at or close to the geometric centre referenced lA.
The slot 2 is closed by a cap 5 made of extruded plastics material and having concavely radiused edges 5A
and 5B which exactly ~it onto the edges 2A and 2B of the slot 2.
~ The slot 2 is filled with a grease-like : material 8, for example one sold under the brand name SYNTEC Type FCC210S and which is a soft thixotropic water blocking material.
Around the rod 1 and the cap 5 is a binder 6 which is helically wound around and serves to locate the cap 5 in place on the slot Z prior to extrusion of an ' outer sheath 7 and during the induction of an excess length of fibre around a capstan as described in our published patent application 8703255, 8522796 and 8611177.
The rod 1 has a roughened surface lA which improves the adhesion between the sheath 7 and the rod l. It is pointed out that Fig l is not to scale and the binder 6 is helically applied so that most of the surface lA of the rod 1 is in direct contact with the sheath 7.
The configuration of the roughened surface lA
is in the form of moulded dimples produced by a woven tape which has been laid against the outside of the rod during manufacture and while the rod is in its soft state and removing the woven tape after the glass/resin rod substrate has been cured, thereby leaving a :
: , . :: ~: . . .
~ a~
roughened surface produced by a ~moulding~ process. The shape and configuration of the woven tape becomes imprinted in the surface of the rod.
Fig 2 shows in detail how this is achieved.
Referring to Fig 2 the strength member rod 1 is produced by glass rovings 10 carried on bobbins 11 which are drawn into a resin bath 12 beneath a guide roller 13.
The rovings 10, coated with resin~ are drawn through a die 14 together with a peel-ply tape 15 drawn from a supply reel 16.
The tape is applied longitudinally around the impregnated glass rovings as they pass througb the die 14 and into a curing oven 17 where the resin impregnating the glass rovings is cured.
The rod 1 thus produced emerges from the oven covered with the peel-ply tape 15 and is wound onto a take up drum 18. The peel-ply tape can either be removed prior to winding onto the take up drum 18 or alternatively can be left on the rod to be removed when the aerial optical fibre cable shown in Fig 1 is manufactured. It is thus possible to draw the rod from the take up drum 18 during manufacture of the cable and peel off the peel ply tape 15 before the optical fibres and the water blocking compound are introduced into the slot 2.
The mesh size of the peel-ply tape which moulds the roughened surface onto the rod is preferably about O.lmm. However a range of sizes would be suitable from O.Olmm up to l.Omm for a rod having a diameter of around 8 to lOmm as in the present embodiment.
The peel-ply tape 15 is so constructed that it does not adhere strongly to the outer surface of the rod 1 and can therefore be easily peeled away from it~ This is accomplished by making the tape of woven or non-woven mono filament which does not have interstices into ~ .
which the resin could penetrate and form a strong adhesive bond.
We have found that the roughened surface lA on the rod 1 significantly improves adhesion between the extruded sheath 7 and the rod 1 so that during use and over long spans, eg SOOM between pylons, relative longitudinal movement between the rod and the sheath is substantially eliminated.
,.
,~ :
Claims (7)
1. An optical fibre cable comprising a dielectric rod-like strength member having a channel which contains an optical conductor, said conductor being protected against longitudinal and transverse stress applied to the strength member, said strength member being encassed in an extruded sheath in contact with the surface of the strength member and wherein the surface of the strength member is roughened by moulding an imprint in the surface of the strength member in order to improve the grip between the sheath and the strength member.
2. A cable as claimed in claim 1, wherein the roughened surface comprises a moulded imprint formed during manufacture of the rod.
3. A cable as claimed in claim 2, wherein the moulded imprint has a mesh size in the range 0.01mm to 1.0mm.
4. A cable as claimed in claim 3, wherein the moulded imprint has a mesh size of approximately 1mm.
5. A method of making an optical fibre cable comprising a strength member rod closely embraced by an extruded sheath, the method comprising moulding the surface of the rod while the rod is soft and subsequently hardening the rod so that the moulded surface configuration remains imprinted in the hardened rod, and extruding a sheath into surface contact with the rod.
6. A method as claimed in claim 5, comprising applying a woven tape against the surface of the rod during manufacture.
7. A strength member for an optical fibre cable, comprising a dielectric rod having an open channel for housing an optical fibre and comprising fibre-reinforded-plastics material, the outer surface of said rod having a roughened surface formed by a moulded imprint in the surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8922964.5 | 1989-10-12 | ||
| GB8922964A GB2237655B (en) | 1989-10-12 | 1989-10-12 | Aerial optical fibre cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2027369A1 CA2027369A1 (en) | 1991-04-13 |
| CA2027369C true CA2027369C (en) | 1998-01-20 |
Family
ID=10664441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002027369A Expired - Fee Related CA2027369C (en) | 1989-10-12 | 1990-10-11 | Aerial optical fibre cable |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US5050960A (en) |
| EP (1) | EP0422863B1 (en) |
| JP (1) | JP3025294B2 (en) |
| AT (1) | ATE94655T1 (en) |
| AU (1) | AU631016B2 (en) |
| CA (1) | CA2027369C (en) |
| DE (1) | DE69003343T2 (en) |
| DK (1) | DK0422863T3 (en) |
| ES (1) | ES2045822T3 (en) |
| GB (1) | GB2237655B (en) |
| IN (1) | IN178292B (en) |
| NZ (1) | NZ235601A (en) |
| ZA (1) | ZA908112B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2233779B (en) * | 1989-07-01 | 1993-05-05 | Stc Plc | Optical fibre cable |
| GB2255836B (en) * | 1991-05-11 | 1995-11-08 | Northern Telecom Ltd | Fibre optic cable |
| JP2680943B2 (en) * | 1991-06-03 | 1997-11-19 | 住友電気工業株式会社 | Optical cable |
| GB2258319B (en) * | 1991-07-30 | 1995-01-18 | Northern Telecom Europ Ltd | Optical fibre cabler comprising optical fibre ribbon |
| GB2308752B (en) * | 1995-12-22 | 1999-12-29 | Pirelli General Plc | Suspended line for an optical fibre unit |
| IT1284536B1 (en) * | 1996-09-16 | 1998-05-21 | Pirelli Cavi S P A Ora Pirelli | OPTICAL CABLE FOR DATA TRANSMISSION IN LOCAL NETWORKS |
| US6178278B1 (en) | 1997-11-13 | 2001-01-23 | Alcatel | Indoor/outdoor dry optical fiber cable |
| US6169834B1 (en) | 1998-05-13 | 2001-01-02 | Alcatel | Slotted composite cable having a cable housing with a tubular opening for copper pairs and a slot for an optical fiber |
| US6253012B1 (en) | 1998-11-12 | 2001-06-26 | Alcatel | Cycled fiber lock for cross-functional totally dry optical fiber loose tube cable |
| US6714708B2 (en) | 2001-03-30 | 2004-03-30 | Corning Cable Systems Llc | Fiber optic with high strength component |
| US6748147B2 (en) | 2001-03-30 | 2004-06-08 | Corning Cable Systems Llc | High strength fiber optic cable |
| US6621964B2 (en) | 2001-05-21 | 2003-09-16 | Corning Cable Systems Llc | Non-stranded high strength fiber optic cable |
| JP5329108B2 (en) | 2008-03-07 | 2013-10-30 | 株式会社フジクラ | Fiber optic cable |
| JP5351503B2 (en) * | 2008-03-07 | 2013-11-27 | 株式会社フジクラ | Optical fiber cable and lead-out method in optical fiber cable |
| JP6196167B2 (en) * | 2014-01-31 | 2017-09-13 | モレックス エルエルシー | Waveguide |
| CN109073845A (en) * | 2016-03-31 | 2018-12-21 | 成都康宁光缆有限公司 | Optical fibre drop cables |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2025650B (en) * | 1978-07-18 | 1982-08-18 | Standard Telephones Cables Ltd | Fibre-optic cable joints |
| US4217028A (en) * | 1978-07-24 | 1980-08-12 | International Telephone And Telegraph Corporation | Fiber optic electromechanical submarine cable termination |
| US4460159A (en) * | 1981-10-09 | 1984-07-17 | Northern Telecom Limited | Optical cable and cable pulling attachment assemblies |
| US4610909A (en) * | 1984-01-09 | 1986-09-09 | At&T Technologies, Inc. | Plastic-coated metallic member |
| US4786138A (en) * | 1985-02-19 | 1988-11-22 | Sea-Log Corporation | Optical-fiber cable construction |
| US4661406A (en) * | 1985-07-02 | 1987-04-28 | Neptco Incorporated | Strength element for fiber optic cables |
| ATE119681T1 (en) * | 1985-09-14 | 1995-03-15 | Northern Telecom Ltd | OPTICAL CABLE. |
| IT1185951B (en) * | 1985-09-27 | 1987-11-18 | Pirelli Cavi Spa | PROCEDURE AND LINE FOR THE PRODUCTION OF CABLES |
| GB8600294D0 (en) * | 1986-01-07 | 1986-02-12 | Bicc Plc | Optical cable |
| GB2201008B (en) * | 1987-02-12 | 1991-10-23 | Stc Plc | Optical fibre cables |
| US4944570A (en) * | 1987-02-18 | 1990-07-31 | Alcatel Na, Inc. | Fiber optic cable having an extended elongation window |
| JPS63132909U (en) * | 1987-02-20 | 1988-08-31 | ||
| JPH0511611Y2 (en) * | 1988-07-26 | 1993-03-23 | ||
| GB8908446D0 (en) * | 1989-04-14 | 1989-06-01 | Bicc Plc | Optical cable |
-
1989
- 1989-10-12 GB GB8922964A patent/GB2237655B/en not_active Revoked
-
1990
- 1990-10-08 NZ NZ235601A patent/NZ235601A/en unknown
- 1990-10-08 AT AT90310987T patent/ATE94655T1/en not_active IP Right Cessation
- 1990-10-08 ES ES90310987T patent/ES2045822T3/en not_active Expired - Lifetime
- 1990-10-08 DE DE90310987T patent/DE69003343T2/en not_active Expired - Fee Related
- 1990-10-08 EP EP90310987A patent/EP0422863B1/en not_active Expired - Lifetime
- 1990-10-08 DK DK90310987.4T patent/DK0422863T3/en active
- 1990-10-09 IN IN984DE1990 patent/IN178292B/en unknown
- 1990-10-09 JP JP02272069A patent/JP3025294B2/en not_active Expired - Lifetime
- 1990-10-10 AU AU63992/90A patent/AU631016B2/en not_active Ceased
- 1990-10-11 ZA ZA908112A patent/ZA908112B/en unknown
- 1990-10-11 CA CA002027369A patent/CA2027369C/en not_active Expired - Fee Related
- 1990-10-12 US US07/596,381 patent/US5050960A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US5050960A (en) | 1991-09-24 |
| DE69003343D1 (en) | 1993-10-21 |
| IN178292B (en) | 1997-03-22 |
| CA2027369A1 (en) | 1991-04-13 |
| DE69003343T2 (en) | 1994-01-13 |
| EP0422863A1 (en) | 1991-04-17 |
| JPH03209408A (en) | 1991-09-12 |
| ES2045822T3 (en) | 1994-01-16 |
| GB2237655A (en) | 1991-05-08 |
| JP3025294B2 (en) | 2000-03-27 |
| ZA908112B (en) | 1991-08-28 |
| NZ235601A (en) | 1992-09-25 |
| ATE94655T1 (en) | 1993-10-15 |
| AU6399290A (en) | 1991-04-18 |
| GB8922964D0 (en) | 1989-11-29 |
| DK0422863T3 (en) | 1994-02-21 |
| GB2237655B (en) | 1993-04-28 |
| EP0422863B1 (en) | 1993-09-15 |
| AU631016B2 (en) | 1992-11-12 |
Similar Documents
| Publication | Publication Date | Title |
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