UN DISPOSITIVO PARA POSICIONAR LA PARTE DE EMBUDO DE UN TUBO DE PRESENTACION DE TELEVISION EN COLORES

摘要

In a method of manufacturing a color television display tube, marks for the positioning of the display window are provided on the funnel part of the tube. Upon providing the marks the funnel part is fixed in a centering device which locates in the funnel part a reference point to which the provision of the marks is referenced. The reference point is situated in or substantially in the deflection center of a deflection device provided afterwards on the funnel part.