NEW METHOD FOR MAKING CORE COLUMN IN COMMON BULB
This invention relates to a method for making a stem in ordinary lamp bulb whose power is less than 100 W. It features that white or lead material is used to make up a glass tube or glass stalk which is then made into a stem of aerated bulb, or vacuum bulb, or aerated bulb and vacuum bulb by combine...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | This invention relates to a method for making a stem in ordinary lamp bulb whose power is less than 100 W. It features that white or lead material is used to make up a glass tube or glass stalk which is then made into a stem of aerated bulb, or vacuum bulb, or aerated bulb and vacuum bulb by combined flattening. Such stem has a longer service life beyond the ministry's standard and a lower rate of rejects than that of lead material one. Its productive cost is greatly decreased. |
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