Global Patent Index - EP 0369370 A3

EP 0369370 A3 19910417 - METHOD OF MANUFACTURING A LAMP VESSEL

Title (en)

METHOD OF MANUFACTURING A LAMP VESSEL

Publication

EP 0369370 A3 19910417 (DE)

Application

EP 89120989 A 19891113

Priority

DE 3838697 A 19881115

Abstract (en)

[origin: EP0369370A2] To manufacture an exhaust-tube-less discharge vessel (10) for a metal halogenide high-pressure discharge lamp, a blank is first produced by means of blow-moulding from a quartz tube closed at one end, the future discharge vessel of which blank is provided with a cap (9) and fully shaped. Subsequently, an interchanging holder holding itself inside the blank and provided with the electrode systems (12, 13, 14) is introduced to a predetermined position. This is followed by a purging-type cleaning process with nitrogen, the introduction of the filling substances (20) and a renewed heating-up of the crimping area with simultaneous nitrogen purging and cooling of the cap (9) of the blank with liquid nitrogen. After the subsequent closing of the lamp vessel (10) by a crimping (21), the protruding quartz tube piece is separated. The discharge vessel (10) is then provided with a glass envelope in a similar manner. <IMAGE>

IPC 1-7

H01J 9/24; H01K 3/00

IPC 8 full level

C03B 23/047 (2006.01); C03B 23/055 (2006.01); C03B 23/07 (2006.01); C03B 23/11 (2006.01); H01J 9/24 (2006.01); H01J 9/385 (2006.01); H01K 3/00 (2006.01); H01K 3/16 (2006.01); H01K 3/22 (2006.01)

CPC (source: EP)

H01J 9/247 (2013.01); H01K 3/00 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0369370 A2 19900523; EP 0369370 A3 19910417; EP 0369370 B1 19940608; DE 3838697 A1 19900517; DE 58907829 D1 19940714; JP H02186530 A 19900720

DOCDB simple family (application)

EP 89120989 A 19891113; DE 3838697 A 19881115; DE 58907829 T 19891113; JP 29515189 A 19891115