JPS57128438A - Manufacture of circular fluorescent lamp - Google Patents

Manufacture of circular fluorescent lamp

Info

Publication number
JPS57128438A
JPS57128438A JP1315281A JP1315281A JPS57128438A JP S57128438 A JPS57128438 A JP S57128438A JP 1315281 A JP1315281 A JP 1315281A JP 1315281 A JP1315281 A JP 1315281A JP S57128438 A JPS57128438 A JP S57128438A
Authority
JP
Japan
Prior art keywords
bulb
glass
nodal
sealing part
mold
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
JP1315281A
Other languages
Japanese (ja)
Other versions
JPH0122700B2 (en
Inventor
Toshiteru Tomita
Tsutomu Maeda
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 DENKI SYLVANIA KK
NEC Home Electronics Ltd
Original Assignee
NIPPON DENKI SYLVANIA KK
NEC Home Electronics Ltd
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 DENKI SYLVANIA KK, NEC Home Electronics Ltd filed Critical NIPPON DENKI SYLVANIA KK
Priority to JP1315281A priority Critical patent/JPS57128438A/en
Publication of JPS57128438A publication Critical patent/JPS57128438A/en
Publication of JPH0122700B2 publication Critical patent/JPH0122700B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

PURPOSE:To prevent any breakdown of the bulb, which might be caused during the time when a straight glass bulb is shaped into a circular shape, by making the thickness of the part near the sealing part between the glass bulb and a stem larger, inserting the sealing part into a mold so as to form a nodal part, and shaping the glass bulb into circular form by holding the said nodal part. CONSTITUTION:A sealing part 5 is formed by heating with burner 4, a flare part 16 of a stem 1 made of lead glass and a bulb 3 made of soda glass, and the thickness of the part near the sealing part 5 is made larger owing to glass flowing down. After that, the part 5 is placed in a mold 6, and the glass bulb 3 is pushed down along the axial direction. At the same time, air or the like is charged with pressure into the bulb 3 so as to make a nodal part 9 to be formed near the sealing part 5 owing to the protruding part 7 of the mold 6. As a result, the thickness of the nodal part 9 can be made even owing to the thick part of the sealing part 5, and the breakdown which is caused when a heated and softened glass bulb 3 is shaped into circular form by holding the part 9 can be extremely minimized.
JP1315281A 1981-01-30 1981-01-30 Manufacture of circular fluorescent lamp Granted JPS57128438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1315281A JPS57128438A (en) 1981-01-30 1981-01-30 Manufacture of circular fluorescent lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1315281A JPS57128438A (en) 1981-01-30 1981-01-30 Manufacture of circular fluorescent lamp

Publications (2)

Publication Number Publication Date
JPS57128438A true JPS57128438A (en) 1982-08-10
JPH0122700B2 JPH0122700B2 (en) 1989-04-27

Family

ID=11825186

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1315281A Granted JPS57128438A (en) 1981-01-30 1981-01-30 Manufacture of circular fluorescent lamp

Country Status (1)

Country Link
JP (1) JPS57128438A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0810623A2 (en) * 1996-05-28 1997-12-03 Schott Glaswerke Lamp manufacturing procedure and lamp manufactured by said procedure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5327592A (en) * 1976-08-21 1978-03-14 Seiya Yanase Process for producing artificial aegagropila sauteri

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5327592A (en) * 1976-08-21 1978-03-14 Seiya Yanase Process for producing artificial aegagropila sauteri

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0810623A2 (en) * 1996-05-28 1997-12-03 Schott Glaswerke Lamp manufacturing procedure and lamp manufactured by said procedure
EP0810623A3 (en) * 1996-05-28 1998-03-04 Schott Glaswerke Lamp manufacturing procedure and lamp manufactured by said procedure

Also Published As

Publication number Publication date
JPH0122700B2 (en) 1989-04-27

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