Patent ID: 6043597
Filing Date: 2000-03-28
Classification: H01J

Abstract:
A color picture tube comprises a mask-frame combination which includes a rectangular frame (1) of a first material and a mask (2) of a second material, with said mask being connected to said frame by a plurality of welding spots and having a mask flange,wherein said mask-frame combination has a pair of longer sides and a pair of shorter sides, and each of said shorter sides has one of said welding spots (SP3, SP8), andwherein notches (10) are provided at both sides of said welding spot (SP3, SP8) of each of said shorter sides, with approximately the following ratio being applicable for a maximum depth (H2-H3) of each of said notches relative to a distance (H3) from an upper edge (13) of said mask flange (7) to a height (H2) of said mask flange (7):H3/H2=1/3wherein:H3 equals the distance between the maximum depth of each of said notches (1) and the upper edge (13) of said mask flange (7); andH2 equals the height of the mask flange (7).