초록 ▼

An assembly-in-process consisting of three components-in-process is disclosed. The components-in-process comprise, respectively, a faceplate with a sealing area circumscribing a target area including of plurality of first registration-affording V-grooves; secondly, a shadow mask support assembly hav

An assembly-in-process consisting of three components-in-process is disclosed. The components-in-process comprise, respectively, a faceplate with a sealing area circumscribing a target area including of plurality of first registration-affording V-grooves; secondly, a shadow mask support assembly having a frame ultimately constituting a part of the tube envelope, and a sealing area having a like plurality of registration-affording V-grooves in alignment with the first V-grooves; and third, a like plurality of balls disposed between the mated first and second V-grooves for establishing precise registration between the faceplate and the frame in the process of screening a pattern of phosphor deposits on the target area and later in the final assembly of the tube. The assembly-in-process is characterized by the use of temporary cementing means for attaching the balls to either the first or second ones of the V-grooves, whereby the components-in-process can be reproducibly registered and re-registered in precise relationship during screening and later in final assembly of the tube. A method for use in manufacture is also disclosed.

대표청구항 ▼

For use in a highresolution color cathode ray tube, a front assembly comprising: a faceplate with a target area for receiving at least one pattern of phosphor deposits, said faceplate having a sealing area circumscribing said target area including a plurality of first substantially radially oriented

For use in a highresolution color cathode ray tube, a front assembly comprising: a faceplate with a target area for receiving at least one pattern of phosphor deposits, said faceplate having a sealing area circumscribing said target area including a plurality of first substantially radially oriented registration-affording V-grooves selectively oriented thereon; a shadow mask support assembly having a frame ultimately constituting a part of the tube envelope supporting a tensed foil shadow mask in precise adjacency to said target area, said frame having a sealing area geometrically matching said faceplate sealing area, and which has thereon a like plurality of second substantially radially oriented registration-affording V-grooves selectively located in alignment with said first V-grooves on said sealing area of said faceplate; and a like plurality of balls disposed between the mated first and second registration affording V-grooves of said faceplate and said frame for establishing precise registration between said faceplate and said shadow mask in the process of screening said pattern of phosphor deposits on said target area and later in the final assembly of said tube; said faceplate assembly having a first cement composed of a vitrifying cement in the regions of said mated registration-affording V-grooves, and a second cement composed of a divitrifying cement elswhere in said sealing area for permanent bonding of said faceplate and said frame, said vitrifying cement softening at a temperature below the divitrifying temperature of said devitrifying cement.