Abstract: A color selecting electrode mounting frame of a CRT which eliminates the waste of materials, is easy and inexpensive to process and assemble. The color selecting electrode mounting frame for a CRT comprises a pair of long members of an L-sectional shape having curved surfaces formed at their top edge portions to which two opposing sides of a color selecting electrode are attached and a pair of short members having end portions joined to the two ends of these long members. The long members are obtained by blanking a plate of a fixed width into an arc shape of a predetermined curvature, then forming this into an L-sectional shape and a curvature matching the panel glass surface of the CRT. The two end portions of the short members are processed to match the curvature of the two end portions of the long members. The end portions of the short members are processed by a twisting, crushing, or shaving process.

Abstract: When three or four panel attachment springs 3 are welded to side portions of an aperture grill 1 (or 21), the aperture grill is disposed so that a grill 107 should be opposed to a predetermined reference plane. The springs are disposed by three or four spring positioning means. A posture of the aperture grill 1 (or 21) is adjusted based on measured results of the respective measurement position Z.sub.0 to Z.sub.4 of the grill 107. Positions of spring pins for supporting springs on the spring positioning means are agreed with positions of panel pins provided on a panel. Thereafter, the respective springs are simultaneously welded to the side portions of the aperture grill. Thus, it is possible to precisely weld the springs to side-portion positions of the aperture grill. When the four springs are welded, it is possible to simultaneously weld the four springs by one equipment.

Abstract: A method for fixing to a frame an electrode or a shadow mask for an image receiving tube. The method includes steps for stretching, in opposite directions, supporting ends of a rectangular mask plate having apertures formed between the supporting ends, in order to generate a tensile force having a uniform distribution over the entire surface of the plate. The method also includes pressing inwardly and bending a pair of elastic supporting elements, constituting two confronting sides of a frame, so that a distribution of the pressing force in a direction of each of the sides almost balances with a distribution of the tensile force. The supporting ends of the mask plate are then rigidly fixed to both of the bent supporting elements of the frame. The stretching and pressing forces applied to the mask plate and the frame are then released.

Abstract: A color selecting electrode for a color-picture tube, includes a rectangular frame-shaped frame having a pair of mutually-opposite long sides and a pair of mutually-opposite short sides, and a mask plate which is stretchedly supported on top surfaces of the frame while receiving a resilient spring force exerted from the frame, the long sides having a greater section modulus and a greater rigidity than the short sides. A method of manufacturing the color selecting electrode includes the step of welding, to the frame pressed inward by an equally-distributed force applied to the pair of long sides and the pair of short sides, the mask plate of which four sides are stretched outward by a distributed force which approximately counterbalances the equally distributed force.

Abstract: A shadow mask assembling apparatus assembles an election beam selection mask for a color cathode ray tube by welding a mask sheet to a frame. The electron beam selection mask assembling apparatus comprises: a bed; a frame support for supporting the frame on the bed with the mask sheet support surfaces of the support members facing upward; a frame positioner for positioning the frame on the frame support; a mask sheet positioner for positioning the mask sheet on the support members of the frame; a fixer for fixing the mask sheet in place on the mask sheet support surfaces of the support members of the frame; a mask sheet support for supporting the central portion and peripheral portions extending beyond the support members of the frame of the mask sheet; and an attaching structure for attaching the mask sheet to the mask sheet support surfaces of the support members of the frame.

Abstract: A method of bonding a glass and a metal with a low-melting glass frit, in which the low-melting glass frit contains from 1 to 10% by weight of an aluminum borate whisker, and the difference in linear expansion coefficient between the low-melting glass frit and the glass is 10.times.10.sup.-7 /.degree.C. or less; and a method for producing a cathode ray tube comprising the step of bonding a glass back plate and a metal stud pin with a low-melting glass frit, the low-melting glass frit containing from 1 to 10% by weight of an aluminum borate whisker, and the difference in linear expansion coefficient between the low-melting glass frit and the glass back plate being 10.times.10.sup.-7 /.degree.C. or less.

Abstract: A covering for a discontinuity in a mask support frame for a tension mask cathode ray tube comprises a stiff yet flexible (or bendable) metal strip having a first surface for facing a mask frame surface which is proximal to a phosphor screen, and attachment to the mask frame on at least one side of the discontinuity, and a second surface facing the phosphor screen. A portion of the covering may be formed to match the cross-section profile of the mask frame surface to which it is attached. The covering may be formed in a continuous rectangle to form a rectangular frame assembly capable of attachment to a faceplate.

Abstract: A method for manufacturing a phosphor screen used in a color CRT takes the steps of multilayering a red phosphor layer, a green phosphor layer, a blue phosphor layer, and a non-luminescent layer being laid between the adjacent color phosphor layer, cutting the multilayered block into filmy pieces toward the thickness, adhering or pressurizing the filmy cut pieces on a glass plate for front panel of the color CRT, and burning the cut pieces. This method makes it possible to efficiently manufacture a high-definition and high-resolution color phosphor screen and form fine RGB stripes. This method, thus, may apply to a small-sized CRT about which the realization of the high-definition and high-resolution color phosphor screen has been difficult.

Abstract: A foil-type shadow mask stretching apparatus for a flat cathode ray tube comprises a clamping device in the shape of an elipse, a circle, other similar shapes. The clamping device has a clamping lane with inclined projections arranged in a tooth-like manner; a ring-shaped push pad having a shape abuttingly compatible with to the clamping lane, and C-shaped clamping rings for tightly pressing the push pad onto the clamping lane, whereby the shadow mask is clamped between the clamping lane and the push pad. The shadow mask stretching apparatus prevents abnormal deformation and wrinkling caused by contraction of a shadow mask.

Abstract: A method of manufacturing a color display tube comprising an envelope having a display window and a color selection electrode and suspension means for suspending the color selection electrode, which four suspension means each contain a member which is fused into the envelope. In the method these members are heated by means of a laser. The members may be provided with bores on which the laser beam is incident, the surfaces of which may be blackened to increase heat absorption. The method is more energy efficient and less cumbersome than the prior method which relied upon coils to heat the members by induction of eddy currents.

Abstract: A production system is disclosed for registering flat tension masks to screen bearing face panels in the manufacture of cathode ray tubes. Both the panel and mask are supported in modules with identical registration features at loading stations and alternately conveyed to an assembly station with a top mounted laser welder for welding the mask to panel rails. A lift assembly up loads the modules into the assembly station where they are registered with the same registration elements. Screen location on the panel is interrogated by panel module associated cameras that view spaced fiducial marks on the panel previously located with respect to the screen. Mask interrogation is also accomplished by a camera array. Early screen interrogation enables the mask to be preliminarily positioned very close to final positioning.

Abstract: An apparatus and method for differentially stretching a flat tension mask to register apertures in the mask with an undedicated screen on a CRT faceplate. Stretching is accomplished biaxially on the mask with a plurality of separate clamping elements along all four sides of the mask. Various methods and means are disclosed for applying a fixed ratio of forces to the clamps to maintain strain in the mask substantially uniform across the entire mask, such as a "wiffle tree" linkage and selected spring rate springs. Growth of the mask during stretching is accommodated by allowing the clamps to move laterally or perpendicular to the stretching forces. Fragile slit aperture masks are stretched with clamps having tangential component stretching forces. Individual and/or groups of clamps can be controlled independently of others to correct for localized mask or screen defects. The clamps move in unison toward the mask to a clamp engagement position where they are precisely aligned in a starting position.

Abstract: An optical interrogation system has camera arrays useful for determining the locations of a plurality of apertures on a flat tension shadow mask and fiducial marks on a screened front panel of a CRT. The system determines the actual location of apertures or fiducial marks with respect to the cameras' field of view. By eliminating gray scaling, the processing only for light/dark transitions in single-bit binary valued pixels from each of the cameras in parallel, i.e., simultaneously, remarkable rapidity is obtained in the interrogation of widely spaced fields with minimal hardware. The system may also be used to interrogate mask support surfaces on the front panel prior to welding the mask thereto.

Abstract: A component-in-process comprises an ultra-thin foil shadow mask having on at least one side thereof a lamina having a composition and thickness effective to physically support and protect the mask during subsequent processing operations. Such operations include forming apertures in a foil mask blank mounted on a lamina, electroforming a foil mask on a lamina, and etching a mask mounted on a lamina to reduce overall thickness or selectively thin it.

Abstract: An annulus attached adjacent the edge planes of a CRT front panel provides screen area savings, and in the preferred embodiment, panel protection, strengthening, and anti-implosion properties. The annulus is preferably composed of a plurality of sections and incorporates a shadow mask support. The annulus is attached to the front panel before receiving the shadow mask and becomes a part of the CRT envelope. In a preferred embodiment, the annulus is composed of ceramic and is x-ray shielded by an application of lead-based frit.

Abstract: A mask support structure is installated as a prefabricated unit in a tension mask color cathode ray tube having a faceplate with a centrally located screening area. The structure has a predetermined Q-height for ultimate affixation on opposed sides of the screening area by means of an inventive fixture and process, which is characterized by Q-height spacers. The structure has a base with a hardened layer of cement of selected thickness thereon for affixing the structure to the faceplate, and on an opposed side, a surface for receiving and securing the mask.

Abstract: A post-mask-deflection color cathode ray tube is disclosed that has a strip-type tension foil shadow mask in the form of two intercalated combs providing mutually insulated first and second arrays of strips. Each of the arrays is adapted to receive a different electrical potential effective to cause electron beams passing therethrough to be deflected by the electrical fields created between the strips. A method of manufacturing is also disclosed.

Abstract: Process and apparatus are disclosed for use in the manufacture of a color cathode ray tube having a shadow mask with a central pattern of apertures mounted in tension on a transparent flat front panel. The mask aperture pattern is registered with a cathodoluminescent screen pattern of corresponding geometry and position on an inner surface of the panel. The shadow masks and front panels are respectively interchangeable. In a preferred arrangement, signals are developed which are indicative of the positions of a mechanically stretched mask aperture pattern and an associated front panel screen pattern relative to a reference or to each other. Responsive to such signals, there is effected a relative positioning of the mask and screen until registration between the patterns is achieved.

Abstract: A generally rectangular mounting structure for attaching a tensioned foil shadow mask to the flat glass faceplate of a color cathode ray tube (CRT) includes four rails attached at respective ends thereof by means of four corner brackets spot welded to adjacent ends of a pair of rails. Each of the four corners of the rail structure is coated with a frit-based sealant to hermetically seal the corner bracket-rail interface, followed by baking, to prevent the collection of contaminants such as phosphor particles which heretofore collected in gaps between the corner bracket and rail only to later escape and cause CRT rejection or failure.

Abstract: A tension mask color cathode ray tube includes a glass faceplate having on its inner surface a centrally disposed, rectangular screening area, and on opposed sides thereof a non-metal shadow mask support structure of predetermined Q-height. The mask support structure has a metal element embedded in the apex of the structure. The apex of the structure and the metal element are ground to define a surface for receiving a tensed foil shadow mask. The surface contains a metal portion to which the mask may be welded, and a non-metal portion which supports the metal portion.

Abstract: The present invention provides an improved method of assemblying a rectangular tensioned shadow mask wherein the two long sides are welded to two curved frame members paralleling the major axis. The improvement comprises forming two subassemblies of said frame, each subassembly including one of the curved members and two partial straight members, each partial straight member being attached at 90 degrees to an end of the curved member. Next, the two subassemblies are positioned in approximately their final positions with the partial straight members on each side of the frame overlapping each other but forming an angle less than 180 degrees on the side of the frame of the intended mask attachment. The long sides of the mask are next welded to the curved members. Now, the subassemblies are rotated until the partial straight members are aligned, to apply tension to the two curved members to place at least a central portion of the shadow mask under a predetermined tension.

Abstract: An apparatus and process for use in the manufacture of a tension-mask color cathode ray tube provides for mechanically severing a waste portion from the useful portion of an in-process foil mask secured to mask-support means extending from a faceplate. The apparatus comprises means for support mask-servering means adjacent ot the mask outside the mask support means, and means for translating the mask-severing means into engagement with the mask to sever the mask from the mask support means adjacent all points along the mask-support means.

Abstract: The present invention provides an improvement in a color picture tube having a tensioned shadow mask and support frame assembly. The mask is rectangular, having two long sides paralleling a central major axis thereof and two short sides paralleling a central minor axis thereof. The mask has a cylindrical contour, with the mask being curved along the major axis and straight along the minor axis. The improvement comprises the frame including two curved members paralleling the major axis and each other and two straight members paralleling the minor axis and each other. The curvature of the curved members matches the curvature of the cylindrical contour of the mask. The two long sides of the mask are welded between the two curved members. Each of the straight members includes two overlapped parts that are welded together where overlapped. Each of the parts is attached to the end of one of the curved members.

Abstract: A novel color selection electrode assembly is utilized in screening a pattern of phosphor areas upon the faceplate of a color cathode ray tube. The faceplate, which is formed of a material having a predetermined temperature coefficient of expansion, has registration affording means. The aforesaid assembly comprises an auxiliary mount formed of a material having a temperature coefficient of expansion greater than that of the faceplate and has a central opening of such span as to enable the mount to surround the periphery of the faceplate. Index bosses, cooperable with the faceplate registration affording means, are detachably secured to the mount. A planar metal foil having a predetermined pattern of apertures and formed of a material having a temperature coefficient of expansion not greater than that of the mount is secured to the mount.

Abstract: A method is disclosed for use in the manufacture of a tension mask color cathode ray tube that includes a glass faceplate having an inner surface with a centrally disposed screening area. A multi-color phosphor screen is formed on the screening area and thereafter there is secured to the inner surface on opposed sides of the screen a shadow mask support structure having Q-height adjustment means for receiving and securing the mask. The Q-height adjustment means is adjusted and affixed at a predetermined Q-height and a foil mask in tension is affixed to the Q-height adjustment means.

Abstract: A method of manufacturing CRT tubes with binary coded faceplates including dispensing a frit paste on the faceplate in the form of a bar code. The frit is devitrified as part of conventional faceplate processing either during normalizing or during devitrification of the mask rail frit without any additional steps. In one embodiment the frit is dispensed through a single dispensing nozzle and the nozzle is moved relative to the faceplate in x and y coordinates to form a single undulating line. In another embodiment, frit is selectively dispensed through a plurality of nozzles for each character pair to form either narrow bars or wide bars.

Abstract: A process is disclosed for use in the manufacture of a color cathode ray tube in which an in-process flat glass faceplate has on its inner face a centrally located phosphor screen. A metal color selection electrode support structure with an electrode-receiving surface is secured to the inner face of the faceplate on opposed sides of the screen. A foil color selection electrode composed of hardened metal is provided which has a surface for engaging the electrode-receiving surface of the support structure. The electrode-receiving surface of the support structure, and a surface of the electrode engaging the support structure, are preconditioned with filler metal means. The color selection electrode is expanded and the preconditioned surfaces are placed in conjunction. Heat is applied to the preconditioned surfaces by means effective to melt the filler metal means with minimal annealing of the hardened metal of the electrode.

Abstract: Continuous, or seam, welding of a foil tension mask (FTM) to a support structure in a color cathode ray tube (CRT) affords various advantages such as a more uniform, stronger weldment, reduced weld power, faster welding speeds, and reduced contamination of the FTM and the CRT's glass faceplate. A continuous CO.sub.2 laser beam operated at approximately 185 watts output power provides sufficient energy to form a high strength FTM-support structure bond while avoiding severing the FTM as well as fouling of the small FTM spertures by the heated, molten portions of the FTM and its support structure.

Abstract: A color selection electrode is suspended in a color display tube from pins which are provided in the corners of the display window. The suspension means comprise a resilient element which is secured to the color selection electrode, and a slide plate slidably secured relative to the flat resilient element rigidly secured to the pin. During the suspension the position of the color selection electrode is adjusted, and the slide plate is rigidly secured to the resilient element.

Abstract: A method is disclosed for use in the manufacture of a color cathode ray tube having a foil tension mask with a central pattern of apertures. A transparent flat front panel has a cathodoluminescent screen pattern on its inner surface. A plurality of mask support means, located on opposed sides of the screen pattern, have respective mask-receiving surfaces for receiving a shadow mask in tension. Q-height error data is developed according to the invention, and the aperture pattern of the mask in expanded and positioned in response to the error data to compensate for errors in Q-height to bring the mask apertures into registry with the screen pattern. Apparatus for measuring Q-height is also disclosed.

Abstract: The invention describes a method of manufacturing a color cathode-ray tube having a color selection electrode attached to a plurality of support studs distributed about and affixed to an interior surface portion of a faceplate panel. The manufacturing steps include: attaching a plurality of support means, each of which includes stud-engaging means, and at least one of the stud-engaging means comprising a washer having a stud-receiving aperture therethrough, to the color selection electrode; positioning the color selection electrode within the faceplate panel with the stud-engaging means positioned on the support studs; and, then, welding the washer to the support means.

Abstract: A slit-type foil tension mask and associated front assembly for a color cathode ray tube comprise a series of parallel strips separated by slits. The strips are loosely coupled by widely spaced ties, the wide tie spacing being such as to produce a strip coupling which promotes handleability of the mask during mask and tube fabrication and facilitates damping of strip vibration when mounted in a tube, but which is insufficient to induce unacceptable Poisson contraction of the mask when uniaxially tensed along the direction of the strips in the plane of the mask, or to permit an unacceptable thermal expansion perpendicular to said strips.

Abstract: Process and apparatus are disclosed for use in the manufacture of a color cathode ray tube having a shadow mask with a central pattern of apertures mounted in tension on a transparent flat front panel. The mask aperture pattern is registered with a catholdoluminescent screen pattern of corresponding geometry and position on an inner surface of the panel. The shadow masks and front panels are respectively interchangeable. Signals are developed which are indicative of the positions of a mechanically stretched mask aperture pattern and an associated front panel screen pattern relative to a reference or to each other. Responsive to such signals, there is effected a relative positioning of the mask and screen until registration between the patterns is achieved.

Abstract: A method of manufacturing a color display tube comprising a display window having a display screen, a flat tensed shadow mask 2 in which the shadow mask 2 is provided with strips 9, 14, 15, 16, along its edges the color display tube has been assembled a test pattern is displayed on the display screen via the shadow mask 2, and certain strips are irradiated using an electron beam or a laser beam, to obtain a desired test pattern by aligning the shadow mask 2 relative to the display screen.

Abstract: In a color cathode ray tube according to this invention, there are provided a plurality of first elastic supporting members welded to a mask frame to support a shadow mask in a panel and each having a metal plate, and at least one second elastic supporting member each having a metal plate and a washer. The area of a polygon formed on a plane lying at right angles with the tube axis and having apices corresponding to the first elastic supporting members is at least about 1/2 of the area of the substantial quadrangle formed by projecting the shadow mask on said plane.

Abstract: A method of making a mask support structure for a cathode ray tube includes the steps of slowly rotating a quantity of sdolder glass paste in a container continuously over an extended period of time so that its viscosity is significantly below an original value, permitting the rotated solder glass paste to stand substantially still until it returns near its original viscosity value, dispensing the solder glass paste in a metallic mask support rail having a generally hollow cross-section, and securing the rail to a CRT faceplate.

Abstract: A method of manufacturing a color display tube in which after the envelope is formed the shadow mask is displaced relative to the display window via movable positioning members provided in the envelope. After the color display tube is assembled a test pattern is displayed on the display screen and is optimized by means of positioning members 23, such that the shadow mask is accurately aligned relative to the display screen 6. The adjusted position is fixed by forming a number of welds, using a laser 33, between the connection means 12 and the support elements 10 in the display window 1.

Abstract: A reusable factory fixture frame is disclosed for use in the manufacture of a color cathode ray tube having a flat faceplate and a tensed foil shadow mask. The frame provides for mounting an in-process shadow mask during photoexposure of an in-process faceplate in a lighthouse. The frame includes a generally rectangular frame structure having grooves thereabout for receiving an edge of the shadow mask. Quick-release mechanical spring clips are provided for temporarily and removably supporting the in-process shadow mask in tension in the grooves. The shadow mask is heated and allowed to expand prior to being temporarily and removably supported on the frame, and the shadow mask is allowed to cool and shrink in tension while so being supported to effect tensing of the shadow mask in clamped condition on the frame.

Abstract: A method of making a CRT mask support structure with a faceplate mounted metal alloy rail filled with solder glass, including the step of coating the interior of the rail with a surfactant prior to filling to promote wetting of the rail by the solder paste.

Abstract: The invention relates to a method of manufacturing a color cathode ray tube, in which in one process step a color selection system and a glass display window having a display screen 2 are assembled. The color selection system and the display window are positioned relative to one another by optimizing a test pattern displayed on the display screen. The adjusted position of the parts relative to one another is then fixed by interconnecting weldable elements which are connected to the parts 1, 4, by means of laser welding through the glass.

Abstract: A process is disclosed for use in the manufacture of a color cathode ray tube having a flat faceplate and tensed foil shadow mask. The process comprises providing a trough-like shadow mask support structure for receiving and securing the mask and filling the structure with a devitrifying solder glass paste of relatively low viscosity. The structure is then over-filled with devitrifying solder glass paste of relatively high viscosity. The structure is joined with the faceplate with the plate of relatively high viscosity in contact with the faceplate. The faceplate and the structure is heated to a temperature effective to shrink the solder glass paste into the structure and devitrify the paste to permanently secure the structure to the faceplate.

Abstract: A reference and support system for a flat CRT tension shadow mask is disclosed which includes a support frame which is frit sealed or shrink fitted onto a peripheral surface surrounding a target area of a flat panel. An upper edge of the support frame is finished so as to provide the desired Q-spacing between the target area and the top of the support frame. Alignment holes are drilled in the sidewalls of the support frame at a given distance from the upper edge to form a reference plane relative thereto. A temporary fixture has a tensioned mask initially secured thereto and is provided with a plurality of pins extending through sidewalls thereof at a given distance from an upper reference surface such that the pins engage the holes in the support frame and precisely position the shadow mask in the plane of the top edge of the support surface.

Abstract: This disclosure describes method and apparatus useful in the manufacture of shadow mask color cathode ray tubes of the flat tension mask type, wherein the shadow masks and associated glass front panels are respectively interchangeable during mask-panel assembly.

Abstract: A reusable factory fixture frame is disclosed for use in the manufacture of a color cathode ray tube having a flat faceplate and a tensed foil shadow mask. The frame provides for mounting an in-process shadow mask during photoexposure of an in-process faceplate in a lighthouse. The frame includes a generally rectangular frame structure having grooves thereabout for receiving an edge of the shadow mask. At least one elongatge rod-like member extending lengthwise of and complementarily mating with the grooves temporarily and removably support an in-process shadow mask in tension. The shadow mask is heated and allowed to expand prior to being temporarily and removably supported on the frame, and the shadow mask is allowed to cool and shrink in tension while so being supported to effect tensing of the shadow mask in clamped condition on the frame.

Abstract: A front assembly is disclosed for a tension mask color cathode ray tube. The assembly comprises a faceplate having a tensed foil shadow mask supported by mask support means, and means for shielding the faceplate from a high-energy beam used to trim waste material from the mask following its attachment to the mask support means.

Abstract: Shielding means are disclosed for use in the manufacture of a tension mask color cathode ray tube having a glass faceplate and a substantially rectangular mask support structure having outwardly tapered sides for deflecting a mask-trimming laser beam away from the glass. The shielding means according to the invention are detachably supported by the support structure, or by the faceplate, for bridging only the corner areas of the support structure where the glass is exposed. The shielding means have a configuration effective to intercept the laser beam and shield the glass from the destructive effects of the laser beam. A process for use of the shielding means in manufacture is also disclosed.

Abstract: A faceplate assembly for a color cathode ray tube is disclosed that includes a glass faceplate having on its inner surface a centrally disposed phosphor screen. A foil shadow mask is mounted in tension on a mask-support structure of tightly controlled uniform height located on opposed sides of the screen and secured to the inner surface by a devitrified solder glass. The assembly according to the invention has a plurality of spacing elements of tightly controlled uniform height located between the support structure and the inner surface of the faceplate, and extending through the solder glass to provide intimate contact with the inner surface. The tightly controlled uniform heights of the support structure and the spacing elements provide for tightly controlled uniform spacing between the mask and screen throughout the length of the support structure. A process for manufacturing a faceplate assembly according to the invention is also disclosed.

Abstract: A method for the mounting of a shadow mask in a trichromatic cathode tube pertains especially to the mounting of the mask on a frame. The shadow mask has a perforated, plane active surface which must be held under sufficient mechanical tension, so that it preserves its planarity during the functioning of the tube. The method consists in increasing the dimensions of the active surface, either by heating it to expand it or by stretching it mechanically to give it the desired mechanical tension, and then in soldering the mask to a sufficiently rigid frame to maintain the active surface in its state of mechanical tension.

Abstract: Means for suspending a color selection electrode from the display window of a color display tube, the means consisting of a first element which is connected to the color selection electrode, and a two-part second element connected to the display window. The second element consists of two separately made parts, a head and a base, enabling manufacture and placement of the head with a high degree of accuracy, and resulting in improved insertion reproducibility of the color selection.

Abstract: A faceplate assembly for a color cathode ray tube includes a glass faceplate having on its inner surface a centrally disposed phosphor screen. A metal foil shadow mask is mounted in tension on a mask support structure located on opposed sides of the screen and secured to the inner surface of the faceplate. The support structure according to the invention has an open side facing the screen filled with a reinforcing material effective to render the structure mechanically rigid and prevent flexure of the structure toward the screen under the tension of the shadow mask. A process for manufacturing the inventive structure is also disclosed.