Document Type and Number:
Japanese Patent JPS6348386
Kind Code:
B2
Abstract:
The invention relates to a method of manufacturing a colour television display tube the envelope of which comprises a conical portion (11) and a window portion (12) which are sealed together in a vacuum-tight manner by means of a sealing glass (18). Before said portions are sealed together, a gettering device (21) is assembled in a place inside the envelope of the tube, for example to the internal magnetic screening cap (17) or the high-voltage contact (26). The gettering device (21) comprises a source of evaporable gettering metal and at least one 25 as source of a material releasing gas upon heating. The gas-releasing material (5) is protected from the influence of moist air at comparatively high temperature by means of a layer of metal (6) provided on the grains of the gas-releasing material (5). As a result of this the gettering device (21) is suitable for being assembled in a television display tube before the window (12) and the cone (11) of the tube have been sealed together by means of a sealing glass (18).
Inventors:
YAN YOSEFUASU BERUNARUDASU FURANSEN
Application Number:
JP4261081A
Publication Date:
September 28, 1988
Filing Date:
March 25, 1981
Export Citation:
Assignee:
FUIRITSUPUSU FURUUIRANPENFUABURIKEN NV
International Classes:
H01J7/18; H01J9/39; H01J9/40; H01J29/94