Abstract: A method and apparatus for coating a seal edge of a funnel portion of a television cathode ray tube with frit slurry, which method includes the steps of arranging at least one pair of nozzle bodies containing frit slurry adjacent to the seal edge, predetermining initial points and terminal points on the seal edge corresponding to the number of pairs of nozzle bodies, moving the paired nozzle bodies from one of the initial points, in opposite directions, along the seal edge while discharging the viscous material on the seal edge and having two of the nozzle bodies meeting each other at one of the terminal points. The whole seal edge is in this manner coated with a continuous uniform layer of frit slurry.

Abstract: Method comprises heating the viewing window of a cathode-ray tube to temperatures above 35.degree. C, dispensing from a storage container onto a surface of said window a quantity of slurry comprised of particulate material mixed with a liquid vehicle, the quantity of slurry being in excess of that required to coat said surface, spreading the quantity of slurry over the surface whereby the slurry is heated by the window, collecting the excess slurry from the surface and returning it to the storage container, and removing the heat transferred to the excess slurry from the window.

Abstract: This disclosure depicts a novel method for dispensing a cement onto the seal land of a color CRT funnel. In particular, this method is intended for dispensing cement onto a funnel seal land which defines a convex curved plane, at least a curved segment of the seal land lying on a predetermined radius. The method comprises holding the funnel in a neck-down position, providing a substantially stationary cement dispensing nozzle and, in order to dispense cement on at least the segment of the curved seal land, swinging the funnel about the origin of the radius of the seal land segment such that the seal land segment passes under the cement dispensing nozzle at a substantially constant predetermined distance beneath the nozzle and in a substantially horizontal attitude. Apparatus is disclosed for implementing the described method.

Abstract: This disclosure depicts a non-settling process for forming on an inner viewing surface of a color cathode ray tube faceplate, a coating of an aqueous slurry composed of an organic binder and a suspension of particulate phosphor material of distributed particle size, which coating exhibits an extraordinarily suppressed radial streaking, a high degree of coating weight uniformity, and a predictable particle size distribution.

Abstract: This disclosure depicts a process for forming on an inner viewing surface of a color cathode ray tube having a flangeless faceplate a coating of an aqueous slurry composed of a photosensitized organic binder and a suspension of phosphor particles. The process comprises applying an aqueous pre-wet to the inner surface of the faceplate and, while the surface is still wet, applying a phosphor slurry to the pre-wetted inner surface of the faceplate; and suffusing the slurry across the surface to form a coating thereof. As a result of the pre-wetting of the faceplate surface, the occurrence of radially oriented non-coated areas on the surface is eliminated and the phosphor sedimentation rate is enhanced.

Abstract: An ultra high resolution screen is provided by spraying small phosphor pacles onto a rotating disc-shaped substrate coated with a thermoplastic film heated to its softening point.

Abstract: An improved precoat layer of highly insoluble, low molecular weight polyvinyl alcohol is uniformly thinly dispersed and dried upon the interior surface of a television picture tube faceplate panel. The precoat is applied by a slurry process with the aqueous slurry containing a predetermined amount of the normally soluble, low molecular weight polyvinyl alcohol and with the material being rendered highly insoluble by adjusting the pH value of the aqueous slurry to a value of less than about 3. The uniformly dispersed and dried precoat provides a highly adherent layer on the glass faceplate panel and the subsequently deposited phosphor pattern is highly adherent to this layer.

Abstract: Method comprises applying a portion of initial slurry to a first substrate, spreading the initial slurry on the substrate, removing the excess slurry from the substrate, preparing a reconstituted slurry comprised of the removed excess slurry and a makeup slurry, and then dispensing a portion of reconstituted slurry onto a second substrate. As compared to the initial slurry, the makeup slurry has at least one of (1) a larger proportion of large particles, (2) a larger proportion of phosphor, (3) a greater binder/water ratio and (4) a smaller photosensitizer/binder ratio..Iaddend.