Method of manufacturing a colour television display tube...

Details Method of manufacturing a colour television display tube... Method of manufacturing a colour television display tube...

H - Electricity

01

J

316/10, 313/107

H01J 7/18 (2006.01) H01J 9/40 (2006.01) H01J 29/94 (2006.01)

Patent

CA 1159504

PHN. 9721 10 ABSTRACT: A gettering device comprises a source of evapor- able gettering metal and at least one gas source of a material releasing gas upon heating. The gas-releasing material is protected from the influence of moist air at comparatively high temperature by means of a layer of metal provided on the grains of the gas-releasing material. As a result of this the gettering device is suitable for being assembled in a television display tube before the window and the cone of the tube have been sealed together by means of a sealing glass.

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