JPS54142882A - Method of evacuating bulb - Google Patents
Method of evacuating bulbInfo
- Publication number
- JPS54142882A JPS54142882A JP4930778A JP4930778A JPS54142882A JP S54142882 A JPS54142882 A JP S54142882A JP 4930778 A JP4930778 A JP 4930778A JP 4930778 A JP4930778 A JP 4930778A JP S54142882 A JPS54142882 A JP S54142882A
- Authority
- JP
- Japan
- Prior art keywords
- bulb
- filament
- evacuating
- gas
- approx
- 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
Abstract
PURPOSE: To prevent absorbed gas or vapor of organic adhesive from being adhered to filament of a bulb by holding the filament temperature during evacuating step higher than the bulb temperature.
CONSTITUTION: An evaculating tube 12 of a bulb 1 is inserted into an evacuating head 4 to be airtightly held so as to thus evacuate the bulb 2. Lead wires 11a, 11b and 9a, 9b are contacted to close a switch 8 of a power supply 7 to thereby energize a filament 13 so as to heat it at approx. 600°C. The bulb 2 is evacuated while heating it to approx. 380°C via a heating furnace 6 to discharge absorbed gas from bulb inner wall, sealer, mount 3, etc. to discharge the gas out of the bulb 2. After degassing, the bulb 1 is exhausted from the furnace 6. The filament 13 is then deenergized to fill gas in the bulb 2 and to then seal the tube 12 so as to thus complete the evacuating work. Thus, it can prevent embrittlement of the filament 13 to thereby obtain a bulb of long life.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4930778A JPS54142882A (en) | 1978-04-27 | 1978-04-27 | Method of evacuating bulb |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4930778A JPS54142882A (en) | 1978-04-27 | 1978-04-27 | Method of evacuating bulb |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54142882A true JPS54142882A (en) | 1979-11-07 |
Family
ID=12827279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4930778A Pending JPS54142882A (en) | 1978-04-27 | 1978-04-27 | Method of evacuating bulb |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54142882A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5766054A (en) * | 1995-08-23 | 1998-06-16 | Nec Corporation | Method of manufacturing cathode ray tube |
-
1978
- 1978-04-27 JP JP4930778A patent/JPS54142882A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5766054A (en) * | 1995-08-23 | 1998-06-16 | Nec Corporation | Method of manufacturing cathode ray tube |
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