Method of manufacturing a color television display tube

Details Method of manufacturing a color television display tube Method of manufacturing a color television display tube

1981-03-30

1982-04-20

McQuade, John

Metal working

Barrier layer or semiconductor device making

Barrier layer device making

H01J 918

Patent

active

043251668

ABSTRACT:
A method is provided for positioning a supporting frame for a color television tube mask in a repeatedly obtainable rest position with respect to the face plate of the tube during various stages of the tube manufacture which require accurate positioning of the frame. Such stages include attachment of the mask to the frame to form a color selection electrode, connection to the frame of means for increasing the mechanical stability of the electrode, and repeated exposures and chemical treatments of color phosphors on the face plate. The method comprises applying a time-varying magnetic field to the frame until it is vibrated into an ultimate rest position relative to the face plate.

REFERENCES:
patent: 3482286 (1969-12-01), Fassett et al.
patent: 3672014 (1972-06-01), Kimbrough
patent: 3701185 (1972-10-01), Van Renssen
patent: 3701193 (1972-10-01), Ragland, Jr.
patent: 3838483 (1974-10-01), Baranski et al.
patent: 4058875 (1977-11-01), Nubani et al.

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