Color cathode ray tube and method of manufacturing the same

Details Color cathode ray tube and method of manufacturing the same Color cathode ray tube and method of manufacturing the same

2005-05-17

2005-05-17

Philogene, Haissa (Department: 2828)

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

C315S402000, C315S400000, C315S400000

Reexamination Certificate

active

06894444

ABSTRACT:
A shadow mask is formed by lapping a main mask and an auxiliary mask on each other. The auxiliary mask includes a porous portion having electron beam passage holes, nonporous portions situated individually at the opposite ends of the porous portion, a pair of skirt portions extending individually from the nonporous portions and lapped on the skirt portion of the main mask, and second beads formed individually on the skirt portions and overlapping first beads of the main mask. The height or width of the first beads and the second beads in a superposed portion in which the main mask and the auxiliary mask are lapped on each other is differentiated from that of the beads in non-superposed portions outside the superposed portion.

REFERENCES:
patent: 6218772 (2001-04-01), Shimizu et al.
patent: 6455993 (2002-09-01), Ito
patent: 6608454 (2003-08-01), Shimizu et al.
patent: 1220274 (2002-07-01), None
patent: 8-293266 (1996-11-01), None
patent: 2001-297708 (2001-10-01), None

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