Sealing method of a cathode ray tube (封 止 方法)

摘要

A stem is assembled with a metal collar having a radially inwardly extending flange at its base. The stem has a reduced diameter upper portion which provides a groove between itself and the inner periphery of the collar. The collar is seated with its flange on the base of the groove. A glass frit is introduced having an initial melting point lower than that of the stem. The assembly heated in vacuum by high frequency heating to cause the collar to give off radiant heat which removes any gas contained within the glass frit. The end of a cathode ray tube neck is inserted into the glass within the groove. The assembly is heated while so positioned to render the glass molten, which then bonds the neck to the groove.