JPS57141841A - Manufacture of circular bulb - Google Patents
Manufacture of circular bulbInfo
- Publication number
- JPS57141841A JPS57141841A JP2490581A JP2490581A JPS57141841A JP S57141841 A JPS57141841 A JP S57141841A JP 2490581 A JP2490581 A JP 2490581A JP 2490581 A JP2490581 A JP 2490581A JP S57141841 A JPS57141841 A JP S57141841A
- Authority
- JP
- Japan
- Prior art keywords
- end part
- glass bulb
- concave groove
- bulb
- sealing process
- 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.)
- Pending
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 reduce the heating work of the sealing process of a circular bulb by forming a concave groove near the end part of a glass bulb prior to the thrusting and sealing process of the glass bulb, and bending and forming the glass bulb after the thrusting and sealing process by holding the concave groove. CONSTITUTION:A drawn part 10 is formed at an end part 9 of a glass bulb 7, the inner wall of which is coated with a phosphor film 8, by heat molding. At the same time, a concave groove 11 is formed above the drawn part 10, near the end part 9. Following that, an electrode structure 12 is inserted from the mouth of the end part 9 of the bulb 7 so as to make the edge of a flare part 13 of a stem 14 to thrust the end part 9, and the edge of the part 13 is fused to the end part 9 to make a fused part 19. Next, the glass bulb 7, after being heated by holding the groove 11 by means of the chuck of a bending equipment, is curved by winding it around a drum, and is cooled to be formed into a circular shape. Consequently, since a concave groove formation work is not carried out in the thrusting and sealing process, the heating work of this process can be reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2490581A JPS57141841A (en) | 1981-02-24 | 1981-02-24 | Manufacture of circular bulb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2490581A JPS57141841A (en) | 1981-02-24 | 1981-02-24 | Manufacture of circular bulb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57141841A true JPS57141841A (en) | 1982-09-02 |
Family
ID=12151186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2490581A Pending JPS57141841A (en) | 1981-02-24 | 1981-02-24 | Manufacture of circular bulb |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57141841A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6177230A (en) * | 1984-09-20 | 1986-04-19 | Ckd Corp | Manufacture of bulb for ring-shaped fluorescent lamp |
-
1981
- 1981-02-24 JP JP2490581A patent/JPS57141841A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6177230A (en) * | 1984-09-20 | 1986-04-19 | Ckd Corp | Manufacture of bulb for ring-shaped fluorescent lamp |
| JPH0418413B2 (en) * | 1984-09-20 | 1992-03-27 | Ckd Corp |
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