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Hitachi Ltd
Original Assignee
Hitachi Ltd
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Publication date
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP4244076ApriorityCriticalpatent/JPS52131781A/en
Publication of JPS52131781ApublicationCriticalpatent/JPS52131781A/en
Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like
(AREA)
Abstract
PURPOSE: To eliminate from the proudction processes for fluorescent lamps such a vain process that machining is made to a defective glass tube in which the tube end is damaged, by checking glass tubes before applying a fluorescent substance or sealing tubes by means of a simple checking procedure using a compressed air introducting block and a stopper block.
COPYRIGHT: (C)1977,JPO&Japio
JP4244076A1976-04-161976-04-16Detecting method for damaged glass tube
PendingJPS52131781A
(en)