MAKING METHOD OF SHADOW MASK FRAME ASSEMBLY

摘要

The system manufactures shadow-mask frame assemblies with minimized doming phenomenon generated by the collision of thermal electrons emitted from an electronic gun and improves resolution of CRT. It presses out the hole section (21B) of a shadow mask (21) to have fewer curvature than the presset curvature, applies some power on the shadow mask (21), and welds the skirt section (21d) to the frame (22).