Pillsbury Madison & Sutro Intellectual Property Group
Color cathode ray tube having shadow mask with prescribed bridge widths
 A shadow mask opposed to a phosphor screen has a substantially rectangular effective surface (30) where slit-like apertures are formed. The apertures are disposed so as to constitute a plurality of aperture rows which extend in parallel with the short axis of the effective surface and are disposed in the long axis of the effective surface. Each of the aperture rows includes a plurality of aperture, and bridges (38) positioned between any adjacent pair of the apertures. The width B of the bridges in the lengthwise direction of the aperture rows, positioned an intermediate between the short axis of the effective surface and a short side edge thereof is greater than that of the bridges positioned at a peripheral portion of the effective surface. 
Kabushiki Kaisha Toshiba
H H H H H
H01J H01J H01J H01J H01J
additional additional inventional inventional additional
Munechika Ichiro Takashi
Tani Saotome Murai