Cathode ray tube and method of manufacturing same

Details Cathode ray tube and method of manufacturing same Cathode ray tube and method of manufacturing same

1998-03-06

2000-04-25

Patel, Nimeshkumar D.

Electric lamp and discharge devices

Cathode ray tube

Envelope

313477HC, 31331305, 31331801, H01R 1346, H01J 3100

Patent

active

060548053

ABSTRACT:
A method of manufacturing a cathode ray tube includes the steps of providing a stem with a flange having an outer diameter smaller than an inner diameter of a bottom end of the neck, performing a sealing operation between the stem and the neck in such a state that a bottom side of the flange is in a position, externally distant from the bottom end of the neck less than a thickness (mm) of the flange while internally distant from it less than twice the thickness of the flange, and moving the stem downward during the sealing operation so as to elongate the sealed portion of the neck, thereby preventing it from being deflated.

REFERENCES:
patent: 4040707 (1977-08-01), Pisano
patent: 5818155 (1998-10-01), Kawamura et al.

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