COLOR CATHODE RAY TUBE WITH INTERNAL FACEPLATE AND FUNNEL REFERENCE SURFACES FOR UNIQUE FACEPLATE-FUNNEL RELATIONSHIP AND METHOD OF TUBE MANUFACTURE

摘要

This invention disclosure depicts a novel rectangular-type color cathode ray tube and a method of manufacturing such a tube which insures that a phosphor screen pattern deposited on an inner surface of the tube faceplate is accurately referenced to the source of electron beams for the tube. The tube has a novel envelope, comprising an approximately rectangular, flangeless faceplate having in at least two perimetric interior regions thereof referencing means, the referencing means defining faceplate reference surfaces. A funnel having an approximately rectangular mouth is sealed to the faceplate. The funnel is provided with a like number of inside funnel reference surfaces in alignment with the faceplate reference surfaces for making referencing engagement with the faceplate reference surfaces when the faceplate and funnel are assembled. The faceplate and funnel reference surfaces are of such number and arrangement as to uniquely determine and fix the location of said faceplate relative to said funnel. In a preferred embodiment, the referencing means on the faceplate comprise corner-mounted studs serving also to hold a color selection electrode for the tube.