Method for introducing a high voltage conductor into a television cathode ray tube

In the manufacture of a television cathode ray tube which includes an envelope with a narrow neck at one end, a method of introducing a high-voltage electrical conductor through the neck of the tube, comprising:

• providing a gun-base assembly comprising a hollow glass stub tubulation on one end of which is an annular glass base carrying an electron gun assembly, and on the distal end of which is temporarily secured a hollow holder, including disposing a conductive coating on an inner surface of said stub tubulation and throughout the length thereof;
• inserting said gun-base assembly into said neck of said tube and hermetically bonding said base to said neck;
• evacuating said tube through said stub tubulation and said temporary holder;
• applying heat circumferentially to said stub tubulation between said distal end of said stub tubulation and said base to soften and pinch off said tubulation, sealing the evacuated cathode ray tube against re-entry of air, said coating forming a continuous conductor extending through said stub tubulation;
• and
• detaching said temporary holder from said stub tubulation to form a cup in said end of said tubulation for receiving and electrical connector.