Patent ID: 6437497
Filing Date: 2002-08-20
Classification: H01J

Abstract:
A color cathode ray tube including a generally rectangular shadow mask made of an Feâ€”Ni alloy material with at least a long side, a short side and a corner, and having a curved apertured portion with a multiplicity of electron-transmissive apertures, a curved imperforate portion surrounding and integral with said apertured portion and a skirt portion bent back from a periphery of said curved imperforate portion, and a generally rectangular support frame for suspending said shadow mask by spot welding said skirt portion thereto, within a panel portion of said color cathode ray tube;said skirt portion being provided with a plurality of slits extending in a direction of a height of said skirt portion and a plurality of embossments extending in the direction of the height of said skirt portion in one of a long side and a short side of said skirt portion; and said plurality of slits and said plurality of embossments being juxtaposed around a circumference of said skirt portion, and a majority of said plurality of slits in said one of said long side and said short side of said skirt portion being slits delimiting continuous openings in said skirt portion which are not bridged by members other than said generally rectangular support frame.