JPS57202623A - Manufacture of circular fluorescent lamp - Google Patents
Manufacture of circular fluorescent lampInfo
- Publication number
- JPS57202623A JPS57202623A JP8855681A JP8855681A JPS57202623A JP S57202623 A JPS57202623 A JP S57202623A JP 8855681 A JP8855681 A JP 8855681A JP 8855681 A JP8855681 A JP 8855681A JP S57202623 A JPS57202623 A JP S57202623A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- oven
- bending
- moving member
- surrounded
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/04—Re-forming tubes or rods
- C03B23/06—Re-forming tubes or rods by bending
- C03B23/065—Re-forming tubes or rods by bending in only one plane, e.g. for making circular neon tubes
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
PURPOSE:To control easily to the temperature distribution suitable for the bending and to reduce the occurring rate of the defective form, by performing the final heating for the bending of the valve sequentially by means of a gas oven and an electric oven. CONSTITUTION:At the stopping position of a moving member rotating intermittently, the upper end of a linear valve 3 made of the soda glass or low lead glass is secured by a chuck provided on the moving member 1. Then said valve 3 is gradually softened thermally by means of an oven 4 due to the rotation of the moving member 1. Thereafter at the position of III, it is surrounded by the gas oven 5 and heated to the proper temperature reliably. Furthermore at the position IV, it is surrounded by the electric oven 7 and heated finally to produce the optimal temperature distribution for the bending. When the valve 3 is carried to the position V, the lower end of the valve is held by the chuck provided on the forming roller 8 thus to bend into the circle. Consequently the occurrence of the defective form can be reduced considerably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8855681A JPS57202623A (en) | 1981-06-08 | 1981-06-08 | Manufacture of circular fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8855681A JPS57202623A (en) | 1981-06-08 | 1981-06-08 | Manufacture of circular fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57202623A true JPS57202623A (en) | 1982-12-11 |
Family
ID=13946137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8855681A Pending JPS57202623A (en) | 1981-06-08 | 1981-06-08 | Manufacture of circular fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57202623A (en) |
-
1981
- 1981-06-08 JP JP8855681A patent/JPS57202623A/en active Pending
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