WO1989002420A1 - A method of and an apparatus for cooling an optical fibre - Google Patents

A method of and an apparatus for cooling an optical fibre Download PDF

Info

Publication number
WO1989002420A1
WO1989002420A1 PCT/FI1988/000130 FI8800130W WO8902420A1 WO 1989002420 A1 WO1989002420 A1 WO 1989002420A1 FI 8800130 W FI8800130 W FI 8800130W WO 8902420 A1 WO8902420 A1 WO 8902420A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
fibre
space
gas
inlet
Prior art date
Application number
PCT/FI1988/000130
Other languages
French (fr)
Inventor
Antti Linden
Risto Pennanen
Lena Stormbom
Original Assignee
Oy Nokia 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 Oy Nokia Ab filed Critical Oy Nokia Ab
Priority to KR1019890700760A priority Critical patent/KR960013525B1/en
Priority to DE8888907326T priority patent/DE3867461D1/en
Priority to AT88907326T priority patent/ATE71070T1/en
Publication of WO1989002420A1 publication Critical patent/WO1989002420A1/en
Priority to DK221089A priority patent/DK168118B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/10—Non-chemical treatment
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C03B37/02718—Thermal treatment of the fibre during the drawing process, e.g. cooling
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/50—Cooling the drawn fibre using liquid coolant prior to coating, e.g. indirect cooling via cooling jacket

Definitions

  • This invention relates to a method of cooling an optical fibre when the fibre is being drawn from a heated glass blank, in which method
  • a gaseous cooling medium is supplied in the axial direction of the fibre around the fibre through the cooling space.
  • a fibre drawn from a glass blank has to be coated with a primary coating after the heating apparatus so as to protect the surface of the fibre and to in ⁇ crease the strength of the fibre.
  • the fibre In order to cool a hot fibre to a suitable temperature prior to coating, the fibre is passed through a cooling apparatus, in which the fibre is brought into heat transfer contact with a cooling medium.
  • a fibre is cooled by passing it through a cooling apparatus in which a gaseous cooling medium, preferably dry nitrogen gas, is blown towards the fibre through a tubular wall of a porous material.
  • a gaseous cooling medium preferably dry nitrogen gas
  • the cooling gas is distributed evenly and the fibre is not exposed to the effects of disadvanta ⁇ geous transverse forces.
  • the use of this kind of cool- ing arrangement makes it difficult to circulate the cooling medium axially through the cool ⁇ ing space against the direction of movement of the fibre, which would be preferable in view of the trans ⁇ fer of heat.
  • Method for cooling and bubble- free coating of optical fibres at high drawing rates C. Jochem and I.
  • Van der Ligt Electronics Letters, 29th August 1985, Vol. 21, No. 18, p. 786, it is sug ⁇ gested to cool a fibre by passing it through a water- cooled cooling pipe which is filled with helium gas circulated axially through a cooling space formed by the cooling pipe.
  • Helium gas has a good coefficient of heat transfer, which ensures that the fibre is cooled sufficiently even at high fibre drawing rates.
  • a dis- advantage is that large quantities of expen ⁇ sive helium gas are required for cooling the fibre.
  • the object of the present invention is to pro ⁇ vide a method of cooling an optical fibre, which method avoids the above-mentioned disadvantages and enables the achievement of a high cooling efficiency with a relatively small cooling medium flow.
  • This ob ⁇ ject is achieved by means of a method according to the invention, which is characterized in that the cooling gas is caused to flow turbulently around the fibre at least at one point in the cooling space.
  • the invention is based on the idea that the turbulence of the cooling medium breaks up the laminar flow of the cooling medium occurring around the fibre to be cooled; consequently, the heat transfer contact between the cooling medium and the surface of the fibre is improved.
  • the flow of the cool ⁇ ing medium through throttle points provided therefor causes pressure losses, so that the cooling space is divided into compartments in which the medium is pressurized, which improves the heat transfer.
  • the invention thus provides a high cooling efficiency with a smaller consumption of cooling medium, without any risk that the axial flow of the cooling medium causes a disadvantageous laminar flow around the fibre.
  • the invention is also concerned with a cooling apparatus for effecting the method according to the invention.
  • the apparatus comprises a cooling pipe de ⁇ fining a tubular cooling space, and an inlet and an outlet for passing the fibre axially through the cool- ing space, and means for supplying a gaseous cooling medium axially through the cooling space.
  • the cooling apparatus is characterized in that the cooling space comprises at least one partition wall positioned be ⁇ tween the fibre inlet and the fibre outlet, the parti- tion wall comprising a common opening for the fibre and the cooling gas to pass through, which opening is such in size that the cooling gas flows turbulently therethrough.
  • the means to be add- ed to the cooling pipe for achieving turbulence are very simple in structure, because the partition wall forming the throttle point may be formed by a ring- shaped plate comprising a central opening through which the fibre to be cooled and the gaseous cooling medium are passed.
  • the number of partition walls and their mutual spacing in the cooling space are chosen according to the requirements in each particular case so that the turbulent points prevent the formation of disadvantageous laminar flow around the fibre during the cooling step.
  • the ring-shaped partition plate comprises not only an opening common to the fibre and the gas but also a number of flow-through holes for the cooling gas between the compartments divided by the partition plates. This kind of flow-through holes provide more contact area between the gaseous medium and the partition plate cooled by the cooling water space, which further improves the cooling of the fibre.
  • Figure 1 is a schematical view of the drawing step of an optical fibre
  • FIG. 2 is a schematical view of the operating principle of a cooling apparatus according to the invention.
  • Figure 3 is a detailed axial sectional view of a partition plate of the cooling apparatus.
  • the reference n - meral 1 indicates a glass blank which is heated in a furnace 2 and which forms a fibre 3 which is drawn continuously from the furnace by means of a drawing means 4.
  • the reference numeral 5 indicates a device for measuring the diameter of the fibre. After the furnace the fibre passes through a cooling apparatus 6 into a coating apparatus 7 for a primary layer and f rther into a hardening unit 8.
  • the cooling apparatus 6 comprises a metal cool ⁇ ing pipe 9 which defines a cooling space 10 through which the fibre to be cooled passes.
  • An inlet 11 and an outlet 12 for the fibre are provided at the top and at the bottom of the cooling pipe, respectively.
  • the inlet 11 and the outlet 12 are sealed with seals 11a and 12a.
  • At the bottom of the cooling pipe is provided an inlet 13 and at the top an outlet 14 for a cooling gas, such as helium.
  • the cooling pipe is surrounded by a jacket 15, so that a cooling water space 16 is de ⁇ fined between the jacket and the pipe.
  • a water inlet is indicated with the reference numeral 17 and a water outlet with the reference numeral 18.
  • a number of transverse ring-shaped partition plates 19 axially spaced from each other are mounted within the cooling pipe.
  • Each partition plate com ⁇ prises a central opening 20 and a number of parallel flow-through holes 21.
  • the openings of the partition plates are positioned concentrically with each other and with the inlet and the outlet for the fibre.
  • the cooling gas A flows upwards in the cooling space 10, through which the fibre to be cooled passes at a high rate.
  • the openings 20 of the partition plates are so dimensioned that the cooling gas flows turbulently through the opening from a compartment 22 separated by the partition plate to the following com ⁇ partment 23, Figure 3.
  • the turbulence B of the cooling gas efficiently breaks up any laminar cooling gas flow, which otherwise tends to be formed around the fibre. This, in turn, improves the transfer of heat between the cooling gas and the fibre, even with a small flow of the cooling gas, thus reducing the con- sumption of gas.
  • Part of the cooling gas flows through the flow-through holes 21 of the partition plates, which increases the contact area between the gas and the cooling water space.
  • the partition plates cause pressure losses in the cooling gas flow, which increases the pressure difference between the inlet and the outlet of the cooling gas, so that the heat transfer capacity of the cooling gas contained in the cooling pipe is im ⁇ proved.
  • the drawing and the description related thereto are only intended to illustrate the idea of the inven ⁇ tion. In its details, the method and the apparatus ac ⁇ cording to the invention may vary within the scope of the claims. Therefore the cooling apparatus is shown only schematically in the drawings. If, for instance, a cooling gas is used which can be- released into the atmosphere, the seal 11a and the outlet 14 can be omitted, whereby the cooling gas is discharged through the fibre inlet 11 into the surrounding space.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Continuous Casting (AREA)

Abstract

A method of and an apparatus for cooling an optical fibre drawn from a heated glass blank by passing the fibre (3) through a cooling pipe (9) in which a cooling gas (A) flows in the axial direction of the fibre around it. In order to reduce the consumption of cooling gas, the cooling gas is caused to flow turbulently (B) around the fibre by means of a throttle point (20) formed by a partition wall (19) in the cooling pipe, so that a laminar flow of cooling gas around the fibre is prevented and the transfer of heat between the cooling gas and the fibre is improved.

Description

A method of and an apparatus for cooling an optical fibre
This invention relates to a method of cooling an optical fibre when the fibre is being drawn from a heated glass blank, in which method
- the drawn fibre is passed through a cooling space, and
- a gaseous cooling medium is supplied in the axial direction of the fibre around the fibre through the cooling space.
In the manufacture of optical fibres, a fibre drawn from a glass blank (preform) has to be coated with a primary coating after the heating apparatus so as to protect the surface of the fibre and to in¬ crease the strength of the fibre. In order to cool a hot fibre to a suitable temperature prior to coating, the fibre is passed through a cooling apparatus, in which the fibre is brought into heat transfer contact with a cooling medium.
U.S. Patent Specification 4,388,093 suggests cooling a fibre by passing it through a cooling vessel filled with a liquid cooling medium. The cooling liquid, however, causes considerable sealing problems at the high drawing rates aimed at in modern fibre drawing processes.
According to the teachings of Swedish Patent Specification 433,605, a fibre is cooled by passing it through a cooling apparatus in which a gaseous cooling medium, preferably dry nitrogen gas, is blown towards the fibre through a tubular wall of a porous material. In this way the cooling gas is distributed evenly and the fibre is not exposed to the effects of disadvanta¬ geous transverse forces. The use of this kind of cool- ing arrangement, however, makes it difficult to circulate the cooling medium axially through the cool¬ ing space against the direction of movement of the fibre, which would be preferable in view of the trans¬ fer of heat. In an article "Method for cooling and bubble- free coating of optical fibres at high drawing rates", C. Jochem and I. Van der Ligt, Electronics Letters, 29th August 1985, Vol. 21, No. 18, p. 786, it is sug¬ gested to cool a fibre by passing it through a water- cooled cooling pipe which is filled with helium gas circulated axially through a cooling space formed by the cooling pipe. Helium gas has a good coefficient of heat transfer, which ensures that the fibre is cooled sufficiently even at high fibre drawing rates. A dis- advantage, however, is that large quantities of expen¬ sive helium gas are required for cooling the fibre.
The object of the present invention is to pro¬ vide a method of cooling an optical fibre, which method avoids the above-mentioned disadvantages and enables the achievement of a high cooling efficiency with a relatively small cooling medium flow. This ob¬ ject is achieved by means of a method according to the invention, which is characterized in that the cooling gas is caused to flow turbulently around the fibre at least at one point in the cooling space.
The invention is based on the idea that the turbulence of the cooling medium breaks up the laminar flow of the cooling medium occurring around the fibre to be cooled; consequently, the heat transfer contact between the cooling medium and the surface of the fibre is improved. In addition, the flow of the cool¬ ing medium through throttle points provided therefor causes pressure losses, so that the cooling space is divided into compartments in which the medium is pressurized, which improves the heat transfer. The invention thus provides a high cooling efficiency with a smaller consumption of cooling medium, without any risk that the axial flow of the cooling medium causes a disadvantageous laminar flow around the fibre. The invention is also concerned with a cooling apparatus for effecting the method according to the invention. The apparatus comprises a cooling pipe de¬ fining a tubular cooling space, and an inlet and an outlet for passing the fibre axially through the cool- ing space, and means for supplying a gaseous cooling medium axially through the cooling space. The cooling apparatus is characterized in that the cooling space comprises at least one partition wall positioned be¬ tween the fibre inlet and the fibre outlet, the parti- tion wall comprising a common opening for the fibre and the cooling gas to pass through, which opening is such in size that the cooling gas flows turbulently therethrough.
According to the invention the means to be add- ed to the cooling pipe for achieving turbulence are very simple in structure, because the partition wall forming the throttle point may be formed by a ring- shaped plate comprising a central opening through which the fibre to be cooled and the gaseous cooling medium are passed. The number of partition walls and their mutual spacing in the cooling space are chosen according to the requirements in each particular case so that the turbulent points prevent the formation of disadvantageous laminar flow around the fibre during the cooling step.
In a cooling apparatus in which the cooling pipe is surrounded by a jacket defining a cooling water space between the jacket and the cooling pipe, it is preferable that the ring-shaped partition plate comprises not only an opening common to the fibre and the gas but also a number of flow-through holes for the cooling gas between the compartments divided by the partition plates. This kind of flow-through holes provide more contact area between the gaseous medium and the partition plate cooled by the cooling water space, which further improves the cooling of the fibre.
Tests carried out with a cooling apparatus ac¬ cording to the invention have shown that the gas con- ouraption of the apparatus according to the invention is only 1/15 of the gas consumption" of a cooling pipe having no partition plates but with the same cooling efficiency.
In the following the invention will be de- scribed in more detail with reference to the attached drawing, wherein
Figure 1 is a schematical view of the drawing step of an optical fibre;
Figure 2 is a schematical view of the operating principle of a cooling apparatus according to the invention; and
Figure 3 is a detailed axial sectional view of a partition plate of the cooling apparatus.
In Figure 1 of the drawing, the reference n - meral 1 indicates a glass blank which is heated in a furnace 2 and which forms a fibre 3 which is drawn continuously from the furnace by means of a drawing means 4. The reference numeral 5 indicates a device for measuring the diameter of the fibre. After the furnace the fibre passes through a cooling apparatus 6 into a coating apparatus 7 for a primary layer and f rther into a hardening unit 8.
The cooling apparatus 6 comprises a metal cool¬ ing pipe 9 which defines a cooling space 10 through which the fibre to be cooled passes. An inlet 11 and an outlet 12 for the fibre are provided at the top and at the bottom of the cooling pipe, respectively. The inlet 11 and the outlet 12 are sealed with seals 11a and 12a. At the bottom of the cooling pipe is provided an inlet 13 and at the top an outlet 14 for a cooling gas, such as helium. The cooling pipe is surrounded by a jacket 15, so that a cooling water space 16 is de¬ fined between the jacket and the pipe. A water inlet is indicated with the reference numeral 17 and a water outlet with the reference numeral 18.
A number of transverse ring-shaped partition plates 19 axially spaced from each other are mounted within the cooling pipe. Each partition plate com¬ prises a central opening 20 and a number of parallel flow-through holes 21. The openings of the partition plates are positioned concentrically with each other and with the inlet and the outlet for the fibre.
The cooling gas A flows upwards in the cooling space 10, through which the fibre to be cooled passes at a high rate. The openings 20 of the partition plates are so dimensioned that the cooling gas flows turbulently through the opening from a compartment 22 separated by the partition plate to the following com¬ partment 23, Figure 3. The turbulence B of the cooling gas efficiently breaks up any laminar cooling gas flow, which otherwise tends to be formed around the fibre. This, in turn, improves the transfer of heat between the cooling gas and the fibre, even with a small flow of the cooling gas, thus reducing the con- sumption of gas. Part of the cooling gas flows through the flow-through holes 21 of the partition plates, which increases the contact area between the gas and the cooling water space.
The partition plates cause pressure losses in the cooling gas flow, which increases the pressure difference between the inlet and the outlet of the cooling gas, so that the heat transfer capacity of the cooling gas contained in the cooling pipe is im¬ proved. The drawing and the description related thereto are only intended to illustrate the idea of the inven¬ tion. In its details, the method and the apparatus ac¬ cording to the invention may vary within the scope of the claims. Therefore the cooling apparatus is shown only schematically in the drawings. If, for instance, a cooling gas is used which can be- released into the atmosphere, the seal 11a and the outlet 14 can be omitted, whereby the cooling gas is discharged through the fibre inlet 11 into the surrounding space.

Claims

Claims :
1. A method of cooling an optical fibre (3) when the fibre is being drawn from a heated glass blank (1), in which method
- the drawn fibre is passed through a cooling space (10); and
- a gaseous cooling medium (A) is supplied in the axial direction of the fibre around the fibre through the cooling space, c h a r a c t e r i z e d in that the cooling gas (A) is caused to flow turbu¬ lently (B) around the fibre (3) at least at one point in the cooling space (10).
2. A method according to claim 1, c h a r a c- t e r i z e d in that the cooling (A) gas is passed through a flow throttle point (20) in the cooling space (10), the fibre (3) moving through the same point.
3. A method according to claim 2, c h a r a c- t e r i z e d in that the cooling gas (A) is passed through the cooling space (10) in a direction opposite to the direction of movement of the fibre (3) .
4. An apparatus for cooling an optical fibre (3) drawn from a heated glass blank (1) prior to applying a primary coating to the fibre, comprising
- a cooling pipe (9) defining a tubular cooling space (10) and an inlet (11) and an outlet (12) for passing the fibre axially through the cooling space; and - means (11, 13, 14) for supplying a gaseous cooling medium (A) axially through the cooling space, c h a r a c t e r i z e d in that the cooling space (10) comprises at least one partition wall (19) posi¬ tioned between the inlet (11) and the outlet (12) of the fibre (3), the partition wall comprising a common opening (20) for the fibre and the cooling gas to pass through, whereby the size of the opening is such that the cooling gas flows turbulently (B) therethrough.
5. An apparatus according to claim 4, c h a r- a c t e r i z e d in that the cooling space (10) com¬ prises several partition walls (19) axially spaced from each other, each partition wall comprising a sep¬ arate opening (20) positioned concentrically with the other openings and with the inlet and outlet (11, 12) of the fibre.
6. An apparatus according to claim 4 or 5, com¬ prising a cooling pipe (9) surrounded with a jacket .(15) defining a cooling water space (16) between the jacket and the cooling pipe, c h a r a c t e r i z e d in that the partition wall (19) is formed by a ring- shaped partition plate attached to the cooling pipe and dividing the cooling space (10) into separate com¬ partments (22, 23).
7. An apparatus according to claim 6, c h a r- a c t e r i z e d in that in addition to an opening
(20) for the fibre the ring-shaped partition plate comprises a number of flow-through holes (21) for the cooling gas (A) between the compartments (22, 23).
8. An apparatus according to claim 4 or 5, c h a r a c t e r i z e d in that an inlet and an outlet (13, 14) for the cooling gas (A) are positioned in the cooling pipe (9) so that the cooling gas flows through the opening (20) against the direction of movement of the fibre (3) .
9. An apparatus according to claim 4 or 5, c h a r a c t e r i z e d in that the fibre inlet (11) acts as an outlet for the cooling gas (A).
PCT/FI1988/000130 1987-09-08 1988-08-15 A method of and an apparatus for cooling an optical fibre WO1989002420A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1019890700760A KR960013525B1 (en) 1987-09-08 1988-08-15 Method and apparatus for cooling optical fibre
DE8888907326T DE3867461D1 (en) 1987-09-08 1988-08-15 DEVICE AND METHOD FOR COOLING AN OPTICAL DRUM.
AT88907326T ATE71070T1 (en) 1987-09-08 1988-08-15 DEVICE AND METHOD FOR COOLING AN OPTICAL FIBER.
DK221089A DK168118B1 (en) 1987-09-08 1989-05-05 Process and appliance for cooling an optical fibre

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI873873 1987-09-08
FI873873A FI78893C (en) 1987-09-08 1987-09-08 Method and apparatus for cooling an optical fiber.

Publications (1)

Publication Number Publication Date
WO1989002420A1 true WO1989002420A1 (en) 1989-03-23

Family

ID=8525017

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1988/000130 WO1989002420A1 (en) 1987-09-08 1988-08-15 A method of and an apparatus for cooling an optical fibre

Country Status (12)

Country Link
US (1) US4966615A (en)
EP (1) EP0331691B1 (en)
JP (1) JPH02500908A (en)
KR (1) KR960013525B1 (en)
AT (1) ATE71070T1 (en)
AU (1) AU601308B2 (en)
CA (1) CA1315534C (en)
DE (2) DE3867461D1 (en)
DK (1) DK168118B1 (en)
ES (1) ES2010357A6 (en)
FI (1) FI78893C (en)
WO (1) WO1989002420A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0579388A1 (en) * 1992-06-24 1994-01-19 The Furukawa Electric Co., Ltd. Optical fiber production method and production apparatus thereof
WO2000006813A1 (en) * 1998-07-29 2000-02-10 Kimberly-Clark Worldwide, Inc. Method and apparatus for quenching of nonwoven filaments
KR100493085B1 (en) * 2002-07-18 2005-06-03 삼성전자주식회사 Cooling device for high-speed drawing
US7322122B2 (en) 1997-01-15 2008-01-29 Draka Comteq B.V. Method and apparatus for curing a fiber having at least two fiber coating curing stages

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4894078A (en) * 1987-10-14 1990-01-16 Sumitomo Electric Industries, Ltd. Method and apparatus for producing optical fiber
JPH03187944A (en) * 1989-12-15 1991-08-15 Sumitomo Electric Ind Ltd Heat-treatment of glass material
DE4022131A1 (en) * 1990-07-11 1992-01-16 Kabelmetal Electro Gmbh METHOD AND DEVICE FOR DRAWING AN OPTICAL FIBER FROM A SOLID PREFORM
US5377491A (en) * 1992-12-11 1995-01-03 Praxair Technology, Inc. Coolant recovery process
DE4339077C2 (en) * 1993-11-16 1997-03-06 Rheydt Kabelwerk Ag Method of drawing an optical fiber and device for carrying it out
GB2287244B (en) * 1994-03-05 1997-07-23 Northern Telecom Ltd Filament cooler
GB2305663B (en) * 1995-09-29 1998-12-02 Samsung Electronics Co Ltd Optical fibre spinning apparatus and method
EP0854121B1 (en) * 1997-01-15 2004-09-29 Alcatel Apparatus for curing a fiber having at least two fiber coating curing stages separated by a cooling stage
US6715323B1 (en) 1997-11-21 2004-04-06 Pirelli Cavi E Sistemi S.P.A. Method and apparatus for cooling optical fibers
KR100248066B1 (en) * 1998-01-13 2000-03-15 윤종용 Cooler of optical fiber draw tower
DE19849431A1 (en) * 1998-10-27 2000-05-04 Zeiss Carl Jena Gmbh Arrangement for cooling optical conductor bundles and optic guide arrays has coolant which fills housing chambers with unenclosed conductor and has lower refractive index than conductor core
US6546758B1 (en) * 2000-08-16 2003-04-15 Alcatel Multi-chamber fiber cooling apparatus
US20020129622A1 (en) * 2001-03-15 2002-09-19 American Air Liquide, Inc. Heat transfer fluids and methods of making and using same
US20020134530A1 (en) * 2001-03-20 2002-09-26 American Air Liquide, Inc. Heat transfer fluids and methods of making and using same
US6668582B2 (en) 2001-04-20 2003-12-30 American Air Liquide Apparatus and methods for low pressure cryogenic cooling
US6574972B2 (en) 2001-04-30 2003-06-10 L'air Liquide - Societe' Anonyme A' Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Low temperature heat transfer methods
US6651358B2 (en) 2001-04-30 2003-11-25 American Air Liquide, Inc. Heat transfer fluids and methods of making and using same comprising hydrogen, helium and combinations thereof
US20030205066A1 (en) * 2002-03-25 2003-11-06 Ghani M. Usman Method and apparatus for efficient cooling of optical fiber during its manufacture
FR2838182B1 (en) * 2002-04-08 2006-09-29 Cit Alcatel FIBER OPTIC COOLING TUBE
US20040251006A1 (en) * 2003-04-03 2004-12-16 Ovidiu Marin Heat exchanger system for cooling optical fibers
US20040194513A1 (en) * 2003-04-04 2004-10-07 Giacobbe Frederick W Fiber coolant system including improved gas seals
US20070113589A1 (en) * 2005-11-18 2007-05-24 Paganessi Joseph E Gas Control Device and Corresponding Method for Recovering Coolant Gases in a Fiber Coolant System
EP3282023A1 (en) * 2016-08-11 2018-02-14 Linde Aktiengesellschaft Cooling device and method for cooling continuous elements
DE102017108549A1 (en) 2017-04-21 2018-10-25 Schott Ag Apparatus and method for cooling a glass strand fabricated by means of tube drawing
CN109836053B (en) * 2018-12-18 2024-05-07 中天科技光纤有限公司 Cooling system and method of use thereof
CN109608057B (en) * 2018-12-25 2023-11-03 通鼎互联信息股份有限公司 Optical fiber cooling device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437870A (en) * 1981-11-05 1984-03-20 Corning Glass Works Optical waveguide fiber cooler
SE433605B (en) * 1981-12-29 1984-06-04 Ericsson Telefon Ab L M DEVICE FOR A GLASS FIBER TREATMENT EQUIPMENT FOR FIBER COOLING

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540870A (en) * 1968-05-07 1970-11-17 Us Air Force Apparatus for drawing and coating quartz glass fibers
US4146377A (en) * 1977-08-17 1979-03-27 Ppg Industries, Inc. Method of using bushing environmental control in glass fiber forming
SU678255A1 (en) * 1978-01-25 1979-08-05 Предприятие П/Я В-2289 Straightening grid
US4174842A (en) * 1978-03-31 1979-11-20 Western Electric Company, Incorporated Non-contacting seal for treating chamber through which elongated material is moved
SU731256A1 (en) * 1978-09-15 1980-04-30 Всесоюзный научно-исследовательский институт гелиевой техники Tube-in-tube-type heat exchanger
US4400190A (en) * 1981-09-28 1983-08-23 Gte Laboratories Incorporated Graphite element for use in a furnace for drawing optical fiber
US4514205A (en) * 1981-11-05 1985-04-30 Corning Glass Works Fiber cooling apparatus
CA1213441A (en) * 1981-11-05 1986-11-04 Charles M. Darcangelo Optical waveguide fiber cooler
NL8203843A (en) * 1982-10-04 1984-05-01 Philips Nv METHOD AND APPARATUS FOR PULLING AN OPTICAL FIBER FROM A FIXED FORM CONSISTING IN MAIN CASE OF SIO2 AND Doped SIO2.
JPS5997490A (en) * 1982-11-27 1984-06-05 Matsushita Electric Ind Co Ltd Heat exchanger
FR2537608B2 (en) * 1982-12-10 1985-12-27 Thomson Csf DEVICE FOR MANUFACTURING AN OBJECT WITH A CHIRAL STRUCTURE FROM A SOURCE OF FORMABLE MATERIAL
NL8402799A (en) * 1984-09-13 1986-04-01 Philips Nv METHOD AND APPARATUS FOR MANUFACTURING AN OPTICAL FIBER WITH A PLASTIC COATING
US4778501A (en) * 1985-11-15 1988-10-18 Incom, Inc. Process and furnace for heat application
US4664689A (en) * 1986-02-27 1987-05-12 Union Carbide Corporation Method and apparatus for rapidly cooling optical fiber
US4761168A (en) * 1986-09-22 1988-08-02 American Telephone And Telegraph Company, At&T Bell Laboratories Optical fiber manufacturing technique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437870A (en) * 1981-11-05 1984-03-20 Corning Glass Works Optical waveguide fiber cooler
SE433605B (en) * 1981-12-29 1984-06-04 Ericsson Telefon Ab L M DEVICE FOR A GLASS FIBER TREATMENT EQUIPMENT FOR FIBER COOLING

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0579388A1 (en) * 1992-06-24 1994-01-19 The Furukawa Electric Co., Ltd. Optical fiber production method and production apparatus thereof
US7322122B2 (en) 1997-01-15 2008-01-29 Draka Comteq B.V. Method and apparatus for curing a fiber having at least two fiber coating curing stages
WO2000006813A1 (en) * 1998-07-29 2000-02-10 Kimberly-Clark Worldwide, Inc. Method and apparatus for quenching of nonwoven filaments
US6117379A (en) * 1998-07-29 2000-09-12 Kimberly-Clark Worldwide, Inc. Method and apparatus for improved quenching of nonwoven filaments
KR100493085B1 (en) * 2002-07-18 2005-06-03 삼성전자주식회사 Cooling device for high-speed drawing

Also Published As

Publication number Publication date
EP0331691B1 (en) 1992-01-02
EP0331691A1 (en) 1989-09-13
FI873873A0 (en) 1987-09-08
DK221089D0 (en) 1989-05-05
KR960013525B1 (en) 1996-10-07
DK168118B1 (en) 1994-02-14
ATE71070T1 (en) 1992-01-15
DE3867461D1 (en) 1992-02-13
JPH02500908A (en) 1990-03-29
AU2263888A (en) 1989-04-17
DE8811384U1 (en) 1988-10-27
KR890701486A (en) 1989-12-20
DK221089A (en) 1989-05-05
FI78893C (en) 1989-10-10
ES2010357A6 (en) 1989-11-01
AU601308B2 (en) 1990-09-06
US4966615A (en) 1990-10-30
FI873873A (en) 1989-03-09
CA1315534C (en) 1993-04-06
FI78893B (en) 1989-06-30

Similar Documents

Publication Publication Date Title
WO1989002420A1 (en) A method of and an apparatus for cooling an optical fibre
US2269060A (en) Tempering of hollow glass articles
US5876118A (en) Calorimeter having rapid cooling of a heating vessel therein
EP1032541B1 (en) Method and apparatus for cooling optical fibers
EP2023749A2 (en) Systems apparatuses and methods for processing the contents of containers and tanks and methods for modifying the processing capabilities of tanks and containers
CA1322275C (en) Method and apparatus for controlling thermal environment in a glass fiber forming process
EP0079186B1 (en) Apparatus for drawing optical fibers
US3248192A (en) Method and apparatus for the manufacture of fibers from glass or other thermoplasticmaterials
EP1180500A2 (en) Method and apparatus for cooling an optical fibre during drawing using a multi-chamber cooler
CA1207534A (en) Glass melting furnaces
US3623857A (en) Glass melting pot
US4351664A (en) Furnace delivery system
US3970442A (en) Method of introducing protective atmosphere gases into a glass forming chamber
US5340091A (en) Batch coil annealing furnace
US4059429A (en) Glass pressing plunger cooling
US3813260A (en) Method for purging dip forming crucible environment
JPS61174133A (en) Production of optical fiber
GB2273980A (en) Concentric tube heat exchanger
US3475148A (en) Method and apparatus for production of glass filaments
US3466186A (en) Dip forming method
US3685568A (en) Method of quenching metal filament in froth
US3645713A (en) Process for the treatment or production of floating flat glass
GB1107142A (en) Improvements in or relating to apparatus for manufacturing flat glass
JP3029505B2 (en) How to blow gas into molten metal
US3864210A (en) Apparatus for cooling liquid metals in atomic reactors

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU DK JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1988907326

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1988907326

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1988907326

Country of ref document: EP