MANUFACTURING METHOD OF COLOR CATHODE-RAY TUBE

PROBLEM TO BE SOLVED: To provide a manufacturing method of a color cathode-ray tube, which is addition to suppress the wrinkles and slacks of a color sorting electrode, can also improve the life of a roller electrode. SOLUTION: It has a 1st welding process, in which by making the roller electrode 16 rotating move, the color sorting electrode 13 is welded on a way from a starting point a to one end 11d of a frame, and has a 2nd welding process, in which after making the roller electrode 16 move again to the starting point, by making the roller electrode 16 rotating move, the color sorting electrode 13 is welded on the way from the starting point a to the other end 11e of the frame. The position corresponding to the frame end face 11c of the roller electrode 16 in the 1st welding process differs from the position corresponding to the frame end face 11c of the roller electrode 16 in the last 1st welding process. By this, it can prevent repeating of using only the one restricted part of the roller electrode 16, then the damage of the roller electrode 16 can be stopped, and large improvement in the life of the roller electrode 16 can be aimed at.