Patent ID: 6528933
Filing Date: 2003-03-04
Classification: H01J

Abstract:
A shadow mask support frame for supporting a shadow mask of a cathode-ray color display tube, the shadow mask support frame being generally rectangular in shape in top plan view, and the shadow mask support frame comprising:first and second end upstands located opposite each other, wherein each of the first and second end upstands is configured to support an outer edge of the shadow mask; and first and second lateral upstands configured to keep first and second ends of the first and second end upstands separated from each other, each of the first and second end upstands and the first and second lateral upstands being generally tubular in shape and being directly connected to each other to form a closed hollow body containing at least one plane closed line located entirely inside the closed hollow body and passing inside each of the first and second end upstands and the first and second lateral upstands, wherein the first and second end upstands and the first and second lateral upstands are formed from at least one thin sheet of metal which is folded so as to form at least a portion of the closed hollow body of the shadow mask support frame comprising at least one of the first end upstand, the second end upstand, the first lateral upstand, and the second lateral upstand.