Shadow mask mount and funnel-faceplate referencing system for color CRT

Claim 1

In a rectangular-type color cathode ray tube, the combination comprising: an approximately rectangular, curved, flangeless faceplate having studs embedded in the four corners thereof and extending from a common concave inner surface of said faceplate, said studs each having a channel shape with a face section flanked by a pair of radially outwardly extending flanges, said studs each having a first end portion embedded in said faceplate and a second portion extending from the faceplate, said second portion having provision in said face section for coupling said stud to a shadow mask, said flanges of said stud constituting spaced faceplate reference surfaces; a funnel having an approximately rectangular mouth sealed to said faceplate and provided in each of three corners of the mouth in registry with three of said studs, a pair of inside funnel reference surfaces, said pairs of funnel reference surfaces being oriented, located and spaced so as to respectively capture and make referencing engagement with said pairs of faceplate reference surfaces when the faceplate and funnel are mated, said faceplate and funnel reference surfaces uniquely determining the location of said faceplate relative to said funnel; and a shadow mask and mounting means on each corner of said mask for retentively engaging said provision on said studs such that said mask is supported adjacent said faceplate inner surface.