Abstract: Improved bonding in a cathode ray tube (CRT) between its glass funnel and glass faceplate is achieved by applying a thin base layer of a priming agent to an aft portion of the faceplate adjacent to the periphery thereof as well as to the forward edge of the funnel prior to positioning of the CRT components in contact. An intermediate layer of sealing glass frit is then deposited upon either of the aforementioned layers of the priming agent and adheres to the two priming agent layers without forming a re-entrant geometry. By "priming" the two abutting glass surfaces over an area which extends beyond the area of high loading with the priming agent prior to joining these surfaces, bond integrity is ensured and high stress concentration in the seal is avoided. The sealing glass frit may be comprised of a conventional glass cement paste and is also used as the priming agent in a preferred embodiment.

Abstract: Apparatus for use in fabricating the faceplate section of a color cathode ray tube, which faceplate comprises a target surface and a shadow mask foil support frame affixed to and circumscribing the target surface. The apparatus comprises a pedestal having registration affording means associated therewith and a tensioning structure which includes a fixture comprising a pair of collars for clamping the edge of the shadow mask foil to support and maintain the foil taut. An anvil is provided for engaging a peripheral portion of the clamped foil to induce a deflection of the foil and, thereby, a predetermined tension in the foil. A first indexing means effects repeatable registrations between the clamping fixture and the pedestal registration affording means.

Abstract: There is disclosed a method of installing a mount assembly in a cathode ray tube wherein convergence characteristics are enhanced by properly setting levels of tube of a color cathode ray tube and of an electron gun. When a neck portion of the tube and a stem structure mounted with the electron gun are sealed to each other by heating, a distance between a standard level of the tube and that of the electron gun is measured. Comparison/arithmetic processing is effected both on the thus measured value and on a previously stored standard distance to seek a difference between the two values. The tube body or the electron gun is controlled by a moving operation so that the difference falls within an allowable value. After this, the sealing process is carried out.

Abstract: A CCD (12) or other photoelectronic device is bonded to an image tube housing (26) to provide a digital output from the image tube (19). The housing (26) and cathode (19) are degassed in chambers (44 and 42) at a high temperature and low pressure. A load lock chamber (46) is degassed and evacuated to remove contaminants. After cooling the chambers (42, 44 and 46) the CCD (12) is placed in the load lock chamber (46) which is then sealed and evacuated. After evacuation, a gate valve (54) is opened between the load lock chamber and the housing chamber (44) and the CCD is placed on a press station (63) of a metal bellow (64). The metal bellow (64) is extended to push the CCD (12) against an indium seal ring (36) on the housing (26), creating a seal between the CCD (12) and the housing (26).

Abstract: Components-in process and assemblies-in-process are disclosed for use in the manufacture of a high-resolution color cathode ray tube having a tensed foil shadow mask. A first component-in-process comprises a faceplate with a target area for receiving at least one pattern of phosphor deposits. The faceplate has attached at preselected, widely spaced locations on the sides thereof a plurality of discrete, detachable first indexing elements. A second component-in-process comprises a shadow mask support assembly having a frame ultimately constituting a part of the tube envelope; the frame supports the shadow mask in precise adjacency to the target area. The frame has attached on the sides thereof a like plurality of discrete, detachable second indexing elements which are in facing adjacency to the first indexing elements on the faceplate when the faceplate and frame are mated. Temporary attachment of the indexing elements is by means of a thermally degradable cement.

Abstract: A culletless main sealing method comprising the steps of heating the end surface of a neck tube of a bulb by burners, pushing a stem to the end surface of the neck tube for welding the stem thereto, and pulling the stem to shape the welded portion. The burners are located at a predetermined constant distance from the plane containing the end surface of the neck tube, and the pushing distance and the pulling distance of the stem at the time of glass welding are determined in accordance with the length of the neck tube, whereby the allowable variation range of the length of the neck tube is enlarged.

Abstract: Negative interference fixturing means and process are disclosed for use in the photoexposure of an in-process faceplate assembly for a color cathode ray tube, and the attachment of a shadow mask to its support. The assembly includes a flat glass faceplate having on its inner surface a centrally disposed screening area for receiving a predetermined pattern of phosphor deposits, a shadow mask having a pattern of apertures corresponding to the pattern of phosphor deposits, and a shadow mask support structure located on opposed sides of the screening area for supporting the mask in tension.

Abstract: A proceses is disclosed for use in the manufacture of a color cathode ray tube having a rectangular flat faceplate. The process comprises positioning the faceplate in a predetermined x-y plane by referencing faceplate a-b-c reference areas on two adjacent edges or sides of the faceplate with complementary a-b-c reference points on a faceplate locating fixture; the fixture also has three spaced six-point precision indexing means. With the faceplate a-b-c reference areas and the faceplate locating fixture a-b-c points mutually referenced, six-point precision indexing means are attached to the faceplate in registation with the precision indexing means on the faceplate locating fixture. Using the precision indexing means attached to the faceplate, a shadow mask is registered with the faceplate through the use of complementary precision indexing means to provide a faceplate-shadow mask assembly in mutual precise registry.

Abstract: In a method of manufacturing a colour television display tube, a reference system is used for adjusting the various components of the tube relative to each other. The system fixes the deflection centre and the electron-optical axis of a deflection device, provided afterwards on the tube, in an early stage of the manufacturing process of the tube. The adjustment of the components is carried out while being referred to the fixed deflection centre or the fixed electron-optical axis. The method simplifies the subsequent positioning of the deflection device on the tube.

Abstract: A process for pre-treating a metal foil shadow mask is disclosed for use in a cathode ray tube wherein the shadow mask is maintained under high tension within said cathode ray tube, and wherein the mask is subjected to predetermined relatively high temperatures during tube manufacture. The process according to the invention comprises pre-heating the shadow mask in a predetermined cycle of temperature and time effective to minimize subsequent permanent dimensional changes in the mask that occur when it is subjected to the predetermined relatively high temperatures, but ineffective to significantly reduce the tensile strength of the mask by annealing.

Abstract: In a method for manufacturing a cathode ray tube, a bulb is held by a first holding mechanism. An electron gun is inserted and held in a neck portion of the bulb by a second holding mechanism. Then, the neck portion and a stem of the electron gun are welded by a welding unit. The unit includes an annular burner having an inner surface with a plurality of burner holes formed in substantially the entire area along a circumferential direction thereof. The annular burner is constructed by two burner members which can be separated in a radial direction. The burner is positioned by an opening/closing mechanism and a reciprocating mechanism such that the inner peripheral surface of the burner is coaxially located outside the neck portion and opposes the stem of the electron gun. Thereafter, the neck portion is heated by flames injected from the burner holes, and then the burner is reciprocally rotated about its axis through a predetermined angle.

Abstract: In-process articles of manufacture are disclosed for the manufacture of a high-resolution color cathode ray tube having a tensed foil shadow mask. A first article-in-process comprises a faceplate with a target area for receiving at least one pattern of phosphor deposits. The faceplate has attached at preselected, widely spaced locations on the sides thereof a plurality of discrete, detachable first indexing elements. An article-in-process comprises a shadow mask support assembly having a frame ultimately constituting a part of the tube envelope; the frame supports the shadow mask in precise adjacency to the target area. The frame has attached on the sides thereof a like plurality of discrete, detachable second indexing elements which are in facing adjacency to the first indexing elements on the faceplate when the faceplate and frame are mated. Temporary attachment of the indexing elements is by means of a thermally degradable cement.

Abstract: 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.

Abstract: A glass faceplate for use in a color cathode ray tube has a target area with a pattern of phosphor deposits circumscribed by a sealing area, and a frame supporting a shadow mask with a sealing area geometrically matching the sealing area of the faceplate. Three indexing means are spaced apart along the sealing areas for indexing the faceplate in relation to the frame, providing a gap of predetermined width, and leaving at least one corner of the faceplate unsupported. Shims means having shimming dimension equivalent to or slightly less than the predetermined gap width is located in the gap at the unsupported corner, whereby the unsupported corner is supported by the shim means such that the predetermined gap width is maintained during tube fabrication even at the unsupported corner. A method for assembling a color cathode ray tube which utilizes the shimming means according to the invention is also disclosed.

Abstract: A color cathode ray tube having feedback features including a phosphor pattern on the mask and a window in the tube wall to allow external detection of the phosphor emissions, also incorporates arc limiting features including a high resistance coating in the neck region of the tube and a lower resistance coating underneath the arc limiting coating in the region of electrical contact between the arc limiting coating and the electron gun. The composite coating is effective to reduce erosion of the arc limiting coating in the area of snubber contact during high voltage conditioning of the tube. Such a tube is useful, for example, for high resolution color displays having an automatic convergence feature.

Abstract: An image display device having an image transmissive faceplate with an exterior surface spaced from a light filtering layer of uniform thickness on a protective transparent panel by an encircling sealed gasket to form an interposed cavity which is filled with image transmissive bonding material. A method comprising the steps of (1) casting an annular gasket in encircling sealed relationship with an implosion panel, (2) depositing within the annular gasket and on the encircled panel a uniform thickness layer of light-filtering material, (3) sealing the gasket to an outer marginal portion of a display tube faceplate to form a cavity between the faceplate and the layer of light-filtering material on the implosion panel, and (4) filling the cavity with light transmissive bonding material.

Abstract: A method of making a color cathode ray tube is disclosed that utilizes a tensed color selection electrode assembly as a stencil for screening a pattern of luminescent phosphor deposits upon a faceplate. The faceplate has a target area and a peripheral sealing area and a plurality of registration-affording means at selected locations about its periphery. The faceplate is utilizable as a constituent of a color cathode ray tube. Electrode assembly comprises frame means to which is bonded a planar tensed foil. Means are provided for bonding the faceplate and the frame means such that the frame becomes an integral part of the vacuum envelope for the tube during final assembly of the tube. Indexing means mechanically associated with the frame and cooperable with the faceplate registration-affording means to facilitate multiple registered matings of the frame and the faceplate during the screening.

Abstract: A kinescope envelope which rests on a fixture is positioned at a location where the envelope size is determined. The envelope is removed from the fixture and positioned at a preselected position where the panel-funnel offset is determined. The size and offset of the envelope are provided to a controller and the offset is compared to a stored designed offset to determine an offset difference. The offset difference is compared to an offset tolerance and a reject signal is provided when the offset tolerance is exceeded. The reject signal is used to place a reject mark on the envelope and to dispense an identification article onto the potentially defective fixture.

Abstract: A support for establishing the sealing length of kinescopes includes a pivotable support. The support is contoured to conform with a contoured neck area of the kinescope whereby the contour references the envelope to a seal plane.

Abstract: When affixing the display screen to the cone and upon evacuating the display tube, the display screen and the cone are subjected to temperature treatments in which stresses occur in the display screen which might cause fracture of the display tube. In order to reduce the probability of fracture, during the temperature treatment measures are taken which infuence the temperature distribution over the display screen and the cone in such manner that the occurrence of stresses in the display screen is counteracted.

Abstract: A method for fabricating a CRT (cathode-ray tube) in which a partially-completed faceplate-panel assembly is baked-out and heat-sealed to a funnel during the same baking cycle. Jets of oxygen-containing gas are directed intermittently into the open neck of the funnel at least during the heating-up period of the heating cycle.

Abstract: For supplying frit slurry to the sealing surface of a funnel portion of a cathode ray tube, air under pressure, preferably saturated with a solvent for the frit slurry, is supplied to a vessel containing the frit slurry, and the latter is transported by the air under pressure out of an outlet of the vessel and through a hose or hoses for deposit on the sealing surface. The flow of frit slurry is regulated by a valve between the vessel outlet and the hoses. The frit slurry contained in the vessel is stirred continuously to maintain a substantially constant slurry viscosity as the slurry leaves the vessel outlet.

Abstract: An abstract for aligning a CRT envelope and the electron gun mount to be inserted into the envelope neck includes fixed members to which the gun mount and envelope are referenced. The envelope is supported at a desired location and in a particular orientation with respect to the reference members. The envelope is rotated to bring the panel sides into a particular position with respect to the reference members. The envelope and gun mount are thus properly aligned.

Abstract: Before a CRT is tipped off following exhaustion of gases to a low pressure, at least a portion of one of the electrodes of the mount assembly (e.g., the grid electrode facing the anode) is heated to high temperatures, preferably about 700.degree. to 800.degree. C., in an atmosphere having a partial pressure of oxygen.

Abstract: A CRT has a unique, machine-readable, coded marking in an external surface thereof. Assembling the CRT includes (1) providing at least one envelope part having a unique, machine-readable coded marking on an external surface thereof, (2) machine-reading the marking, (3) generating a signal in response to step (2) and, (4) in response to the signal, initiating a local process for action with respect to the envelope part. The action may include transportation of the part, assembly of other parts or subassemblies to the part, or testing of an assembly including the part.

Abstract: The method of assembling a CRT includes (1) providing at least one envelope part having a unique, optically machine-readable, process-survivable coded marking on an external surface thereof, (2) optically machine-reading the marking, (3) generating a signal in response to step (2), (4) in response to the signal, initiating a local process for action with respect to the envelope part and (5) recording data of the local process with reference to said coded marking. The action may include transportation of the part, assembly of other parts or subassemblies to the part, or testing of an assembly including the part.