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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co LtdfiledCriticalToshiba Corp
Priority to JP13765776ApriorityCriticalpatent/JPS5362381A/en
Publication of JPS5362381ApublicationCriticalpatent/JPS5362381A/en
Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like
(AREA)
Abstract
PURPOSE: To prevent peeling and cracking of the coated film with a glass tube end section located at an upper portion in the process of forming coated film positioned at an upper portion in the process of softening by heating so as to correspond a portion less in the thickness of the film to the most stretchable portion of the bulb.
COPYRIGHT: (C)1978,JPO&Japio
JP13765776A1976-11-161976-11-16Method of producing ring-shaped fluorescent lamp
PendingJPS5362381A
(en)