Title: Method for making core colum in common bulb
Application Number: 89105811 Application Date: 1989.12.14
Publication Number: 1045198 Publication Date: 1990.09.05
Approval Pub. Date: Granted Pub. Date: 1992.07.08
International Classifi-cation: H01K3/08,H01K3/10
Applicant(s) Name: Hnyang Electric Bulbs Factory Address:
Inventor(s) Name: Deng Zhengqing
Attorney & Agent: PAN GUIYING
Abstract:
     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.
Time: 14