Vacuum seal method for cathode ray tubes

Details Vacuum seal method for cathode ray tubes Vacuum seal method for cathode ray tubes

1996-10-15

1997-10-28

Czaja, Donald E.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

65 322, 65 34, 65 42, 65 43, 445 45, C03C 2710

Patent

active

056811985

ABSTRACT:
A method of evacuating and sealing a cathode ray tube, CRT, using softened glass frit to seal the exhaust hole through which the CRT is evacuated. A three way branch tube allows a shaft driven by a linear motion means to cover the exhaust hole with a sealing plug or plate and softened vitreous glass frit while the CRT is being evacuated. In one embodiment a getter is also used. Since the CRT is being evacuated when the vitreous glass frit is softened any gases evolved from the softened glass frit are removed by the vacuum pump and are not a problem to the sealed CRT.

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