Abstract: A method for coating the internal threads of a fastener includes a rotatable base for holding the fastener, and an applicator having a discharge orifice extending through its side wall which contacts the internal threads at a single point of tangency, the axis of the applicator being offset from the rotational axis of the base. Thus, an induced side load force is created at the point of tangency for effecting the pressing of discharged sealant into the roots of the threads. Differently sized internally threaded elements can be coated in accordance with the invention while using the same sealant applicator.

Abstract: An apparatus and method for applying an adhesive to the edge of the can by inserting the can into the adhesive to its top surface and rotating the can 360.degree. or more, then past the edge of a doctor roll to remove excess adhesive in a selected region and then advancing the cans through an induction heater in a continuous motion until the can reaches a discharge station where it is released.

Abstract: A process of enameling the inside surface of hollow vessels, which have two openings at opposite points. In a hot-water reservoir to be enameled these openings are provided at both ends. One opening is connected to a vacuum pump and the other to a conduit which incorporates a valve and leads to an enamel slip reservoir. In a first step, a vacuum pump is operated to pre-evacuate the interior of the hollow vessel so that air is removed from the pores at the inside surface of the hollow vessel. In this step the valve in the slip conduit remains closed. When the vessel has been preevacuated to about 40 to 80 torrs absolute, the valve is opened so that slip flows suddenly into the hollow vessel and fills the pores while the evacuation is continued and slip is sucked into the hollow vessel until the slip emerges from the opening through which the hollow vessel is being evacuated.

Abstract: A method for coating the interior of a cylindrical surface comprising depositing on the interior or a rotating cylindrical surface a dry hydraulic cement composition and applying to the dry cement coating which is held stationary on the interior cylindrical surface by the centrifugal force of the rotating cylinder an aqueous composition and allowing the cement to harden to provide a coating having no tendency to slump or sag in the wet condition.

Abstract: A method of coating a pipeline comprising the steps of:Welding joints of pipe, end to end to form a continuous pipeline having an entry end and an exit end, winding said pipeline onto a reel, and coating the interior thereof by inserting a pig into the pipeline at one end thereof and affixing a cap at the other end thereof, introducing a coating liquid into the pipeline on the reel, and rotating the pipeline while the pig is maintained in a relatively static position so that the pig smoothly and evenly coats the pipeline as it rotates.

Abstract: A method whereby slip is applied for providing an enamel coating to interior surfaces of a tank such as a heat exchanger of a hot water boiler, electric water heater and the like fabricated beforehand as by welding. In this method, a larger amount of slip than that actually required for applying the slip coating to the interior surfaces of the tank is introduced into the tank to be applied thereto with the tank being rotated, and the excess slip which has not been applied to the surfaces is forcedly drained from the tank at a rate higher than the rate at which the slip moves relative to the enameled surfaces and which moving rate is determined by the liquid level of the slip within the tank and the size of a discharge port, so that an enamel coating of a desired thickness can be formed on the interior surfaces of the tank. In order to forcedly drain the excess slip from the tank, pneumatic pressure is supplied to the interior of the tank prior to slip application.

Abstract: A method and apparatus for coating the inside of tubular members, more specifically can bodies, which are open at opposite ends. The apparatus includes a supply tube and a return tube which are spaced apart to have received therebetween the tubular member to be coated. In each of the supply tube and the return tube there is positioned a corona electrode, the corona electrodes being in alignment wherein powder supplied to the interior of the tubular member is both initially charged as it passes through the supply tube and is further charged within the tubular member by an electrical field which exists between the two corona electrodes and the tubular member.

Abstract: A process for depositing thick film electronic material which forms elect circuits on the inside wall of right circular substrates. The process includes the determination of a circuit pattern wherein a light sensor is used to actuate electronics which in turn controls the flow of the thick film paste for deposition on the substrate inside wall. The substrate is rotated and translated in conjunction with the movement of a light sensor in the x-y plane.

Abstract: In a process for forming an extremely hard-wearing rubber or bearing surface on a metal machine part, particles of hard grit, such as carbide grit, are deliberately formed into the surface using a resiliently-loaded tool, so that the surface becomes permanently impregnated with the hard particles. During the operation the particles can conveniently be contained in a slurry that flows over the surface. After impregnation, a lapping operation is performed on the impregnated surface using a fine carbide grit.

Abstract: The interior of a pipe is coated with a uniform thickness of plastic. A fluidized bed of heat-meltable plastic material in particular form is connected to the inlet end of the pipe, while the opposed end of the pipe is made attachable to a source of reduced pressure. A source of compressible fluid is also connected to the inlet end of the pipe. The pipe is preheated and then rotated axially while the compressible fluid flows therethrough. The compressible fluid flowing to the inlet is suddenly terminated while a flow from the fluidized bed is immediately established so that the vacuum at the outlet end of the pipe causes uninterrupted mass flow and pulls a finite pocket of the finely divided plastic into the pipe. The flow of particular plastic material is terminated, while the flow of compressed gas is immediately re-established, thereby pushing the pocket of plastic material into and through the pipe.

Abstract: Process for coating elongated lamp envelope for reflector-type fluorescent lamp in which only one lehring step is used to remove binder from the applied plural coatings, thereby reducing lamp costs and simplifying the coating process. The reflector portion of the coating is formed of mixed titania and phosphor, which permits the reflective material to be removed from the end portions of the coated envelope after the applied reflective material coating and overlying phosphor have been lehred. There is also provided the resulting lamp.

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: A method and apparatus utilized in forming a hemispherical shape from a cast thermoplastic acrylic resin sheet or the like, dyeing the inside surface of the hemisphere to provide a uniform color density or a color density variation increasing from light to dark from the horizon to the zenith point of the hemisphere, heating the hemisphere to its forming temperature, causing it to revert to a flat sheet, and reverse forming the hemisphere to have the dyed surface on the outside.

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: A method of producing a refractory lining in a cylinder or tube by initiating an exothermic reduction reaction, such as an aluminothermic reduction reaction, within the cylinder and causing the reaction products to coat the interior of the tube substantially uniformly. The product of the method, a ceramic-or refractory-lined cylinder, is also disclosed.

Abstract: A method for coating the inner surface of a metal pipe having an inner diameter of about 1 to 15 cm, which comprises feeding from one end of said metal pipe dry particles of a coating composition into the interior of the metal pipe preheated at a temperature of from a softening point of said coating composition to below a melting point thereof, sucking air at the same time from the other end of the metal pipe so as to form an air stream carrying the particles and flowing in the interior of the pipe at a flow rate of about 4 to 20 m/sec and to allow the particles to deposit on the inner surface of the pipe, and fusing the deposited particles at a reduced pressure of 10 to about 100 mm Hg to form a continuous film on the inner surface of the pipe.

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.