JPS5645846A - Heating furnace for optical fiber - Google Patents

Heating furnace for optical fiber

Info

Publication number
JPS5645846A
JPS5645846A JP12247579A JP12247579A JPS5645846A JP S5645846 A JPS5645846 A JP S5645846A JP 12247579 A JP12247579 A JP 12247579A JP 12247579 A JP12247579 A JP 12247579A JP S5645846 A JPS5645846 A JP S5645846A
Authority
JP
Japan
Prior art keywords
sintered body
heating element
shielding cylinders
hermetic vessel
clearance
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.)
Granted
Application number
JP12247579A
Other languages
Japanese (ja)
Other versions
JPS5737537B2 (en
Inventor
Motohiro Nakahara
Fumiaki Hanawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP12247579A priority Critical patent/JPS5645846A/en
Publication of JPS5645846A publication Critical patent/JPS5645846A/en
Publication of JPS5737537B2 publication Critical patent/JPS5737537B2/ja
Granted legal-status Critical Current

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
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
    • C03B37/0146—Furnaces therefor, e.g. muffle tubes, furnace linings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Thermal Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

PURPOSE:To prevent consumption owing to oxidation of a heating element by diving the shielding cylinders covering the part of a porous glass sintered body having been made transparent to upper and lower to form a clearance, heating the sintered body from here and feeding the nonoxidative gas existing in the surroundings into the shielding cylinders. CONSTITUTION:An annular heating element 14 is placed within a hermetic vessel 12 into which a nonoxidative gas is fed. A bar-shaped porous glass sintered body 15 is passed in its inside. This sintered body 15 is connected to the bottom end of a supporting bar 18 and is moved upward while being slewed so that its top end is projected from the hermetic vessel. On ther other hand, the shielding cylinders 16, 17 divided to upper and lower are so provided as to cover the sintered body 15 and are fixed to the hermetic vessel 12. Through the clearance between these upper and lower shielding cylinders 16, 17, the nonoxidative gas existing around the heating element 14 is continously fed into the shielding cylinders 16, 17 and at the same time the sintered body is heated thereby. Because of this, the heating element is prevented from being consumed by oxidation.
JP12247579A 1979-09-22 1979-09-22 Heating furnace for optical fiber Granted JPS5645846A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12247579A JPS5645846A (en) 1979-09-22 1979-09-22 Heating furnace for optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12247579A JPS5645846A (en) 1979-09-22 1979-09-22 Heating furnace for optical fiber

Publications (2)

Publication Number Publication Date
JPS5645846A true JPS5645846A (en) 1981-04-25
JPS5737537B2 JPS5737537B2 (en) 1982-08-10

Family

ID=14836760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12247579A Granted JPS5645846A (en) 1979-09-22 1979-09-22 Heating furnace for optical fiber

Country Status (1)

Country Link
JP (1) JPS5645846A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1110918A2 (en) * 1999-12-22 2001-06-27 Samsung Electronics Co., Ltd. Apparatus and method for sintering an over-jacketing sol-gel derived glass tube for an optical fiber preform

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58134235U (en) * 1982-03-05 1983-09-09 日立造船株式会社 Conveying device in press
JPS5977529U (en) * 1982-11-15 1984-05-25 株式会社小松製作所 Blank material supply device
JPS59165738U (en) * 1983-04-25 1984-11-07 日立造船株式会社 Product loading device
JPS605731U (en) * 1983-06-24 1985-01-16 福井機械株式会社 Transfer press blank feeding device
JPS623231U (en) * 1985-06-22 1987-01-10

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1110918A2 (en) * 1999-12-22 2001-06-27 Samsung Electronics Co., Ltd. Apparatus and method for sintering an over-jacketing sol-gel derived glass tube for an optical fiber preform
EP1110918A3 (en) * 1999-12-22 2002-06-05 Samsung Electronics Co., Ltd. Apparatus and method for sintering an over-jacketing sol-gel derived glass tube for an optical fiber preform
US6510711B2 (en) 1999-12-22 2003-01-28 Samsung Electronics Co., Ltd Apparatus and method for sintering a sol-gel tube using a furnace having a rotating cap

Also Published As

Publication number Publication date
JPS5737537B2 (en) 1982-08-10

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