Abstract: An article of a crystalline thermoplastic resin is electrostatically coated by the steps of: electrostatically applying a polyurethane, olefin, polyester or epoxy primer to a molding of a resin composition comprising 100 parts by weight of a crystalline thermoplastic resin and 2 to 100 parts by weight of a conductive filler and having a surface resistivity of 10.sup.9 .OMEGA. or below, curing the primer, electrostatically applying a top coat to the resulting molding and curing the top coat by baking. The coated article is also disclosed.

Abstract: A method and apparatus of applying a coating to a substrate is provided. A liquid resin is introduced into a first region at a predetermined pressure. The liquid resin is maintained within a first pressure range in the first region. Next, the flow of the resin from the first region to a second region is controlled so as to bring the resin from the first pressure range to a second pressure range, the pressures in the second pressure range being lower than the pressures in the first pressure range. The liquid resin is then applied at a pressure within the second pressure range to the substrate at a third region adjacent the second region.

Abstract: A differential pressure sealing apparatus and method for processing a continuously moving elongated sheet through successively different stages of vacuum. A vacuum chamber is provided with an inlet and a guide roller for the incoming sheet with the sheet urged against the guide roller over a wrap contact angle of 15 to 120 degrees. To resist the entrance of air into the chamber, a sealing structure encompasses at least portions of the entrance, the guide roller and the sheet.

Abstract: A method and apparatus is provided for removing electrostatically bonded powder coating material from a non-recessed region of a surface of a workpiece without removing powder coating material from a recessed region of the surface of the workpiece. The present invention employs a powder coating removal apparatus for removing the powder coating material from the non-recessed region. The powder coating removal apparatus comprises a rotatable drum including a hollow cylindrical portion having a plurality of openings therein. A plurality of elastic bands are connected to opposite end portions of the drum and serve to frictionally engage and agitate the powder coating material on the non-recessed region of the surface, thereby overcoming the electrostatic bond between the non-recessed region and the powder coating material thereon.

Abstract: A method of making roofing shingles in several lanes in which, after the asphalt saturated base sheet is covered with a first granule layer, a pattern of asphalt patches is printed on each lane and contrasting color granules are adhered to the patches. Each patch pattern repeats each shingle length but is non-symmetric about the center line of the length of each shingle. When the sheet is cut into shingles, the shingles from each lane have a different patch pattern from the other lanes. The shingles are assembled in bundles containing shingles from at least two lanes and approximately equal numbers of the patch patterns are located on opposite sides of the bundle to make sure the bundle is not tilted. The patch pattern is such that when each shingle is cut into tabs (thirds), at least one and preferably two tabs from each shingle has its center free of patches, enabling the tab to bend over a ridge with less risk of cracking. Preferably no patches are located at the lines where the shingles are cut into tabs.

Abstract: Active matrix addressed liquid crystal TV sets configurated in the way described by A. G. Fischer in U.S. Pat. No. 3,840,695 can be enlarged to monolithic square-meter-sized wall TV panels. The large-area thin-film-electronic matrix circuit needed to address the superimposed liquid crystal layer can be vacuum-deposited from a multiple source evaporator onto one coherent glass pane through a number of small reticulated perforated sheet metal masks which are held successively against a chosen reticle of the large glass pane, in exact registration with each other and neighbouring reticles. The large glass pane must be precision-shifted in X-Y-reticle-steps for repeated vacuum depositions, in exact registration. The machinery required is described.

Abstract: A method and an assembly useful for dispensing small quantities of liquid materials onto a workpiece. The assembly includes an applicator having a pin movable along a passageway from a retracted position to an extended position. As the pin moves to the extended position, a forward end of the pin picks up a small dot of the liquid materials and carries the dot to a position external of a housing of the applicator and into contact with a selected location on the workpiece. As the pin is retracted, a portion of the dot remains on the selected location and detaches from the pin. The assembly is particularly useful for dispensing small dots of solder paste at relatively high speeds in automated fashion at selected locations on a circuit board.

Abstract: A process for applying a decorative design to a hard surface is provided which utilizes a template with holes of a predetermined design cut by a water jet to give a feathered boundary to the holes. The feathered boundary enables a hard surface when painted to have the realistic appearance of a brick and mortar interface.

Abstract: There is disclosed a head for use in an apparatus for coating a sheet member which comprises a first body portion, securable at a predetermined spacing from the surface to be coated, a coating blade securable to the first body portion and projecting towards said surface to be coated and a second body portion which is resiliently mounted with respect to the first body portion and which, in use, defines with the sheet material with which it is in contact and with the blade, a coating pool which is fed by a coating reservoir and from which the coating composition is applied to the sheet material. Also disclosed is an apparatus including the head and a method of coating a sheet material with the head.

Abstract: A photo CVD apparatus includes a reaction chamber, a light source for radiating light to the inside of the chamber through a light window, and a pair of electrodes disposed in the chamber for glow discharge, one of the electrodes being located on the light window. After deposition by photo CVD, a light window for transmission of UV light is cleaned by plasma etching by virtue of glow discharge taking place between the electrodes. The light source and the electrodes for plasma etching share one power supply for supplying high frequency electric power.

Abstract: The present invention is directed to a method of producing an improved reverse osmosis membrane that shows surprisingly improved solute rejection and permeation properties. The membrane includes a separating layer of a polyamideurea formed in situ by reaction of isocyanate-substituted acyl chloride and a diamine-treated microporous substrate.

Abstract: Lead frame workholder and transport apparatus for holding and transporting a strip of lead frames from one station to another, each lead frame having a pad and a locating pinhole, comprises a track having an input station at one end and an output station at the other end with an application station in between, a vacuum loader for loading a strip of lead frames onto the input station, a first transporter for contacting the lead frame strip in the input station by inserting a pin into the locating pinhole and moving the strip along the track to the application station, and a second transporter for moving the strip to the output station and into an exit carrier. A method of applying an epoxy layer to the pads of a strip of lead frames using the apparatus is disclosed.

Abstract: A method and apparatus for spraying a solid particulate powder onto the interior surface of tubular articles by intermittently pumping the powder from a fluidized bed of powder through a powder supply line containing an intermittently operated venturi pump and air amplifier, as well as a pair of constantly operated air diffusers and an electrostatic charging apparatus. A powder collection shroud adjacent at least one open end of the tubular article has a carefully regulated vacuum applied thereto in order to collect oversprayed powders.

Abstract: A method and an apparatus for electrostatic coating of workpieces with powdered material includes a plurality of successively arranged spray guns which are passed by the workpieces. At least the spray gun which is passed first by the workpieces is charged with recycled powder while at least the spray gun which is passed last by the workpieces is charged with fresh powder in form of a powder-air mixture containing a low amount of air and supplied at low velocity.

Abstract: A method is disclosed for an improved process for coating a substrate with a marbleized polyester coating. The substrate is prepared for adherence by a polyester material. The substrate is coated with a first colored polyester material. A second colored polyester material is deposited onto selected area of the first colored polyester material prior to the curing of the first colored polyester material. The first and second uncured polyester materials are reciprocally rolled with a fibrous roller to blend the second colored polyester material into the first colored polyester material to produce the marbleized polyester coating.

Abstract: A method of producing an ornamental sticker having a configuration in which an adhesive layer, a base plate layer and a multicolored printing layer are formed as one body to make an applique sheet, which sticker requires no separate cutting process in the manufacturing thereof, and which sticker is available for various uses of industrial purposes as well as reuse. The adhesive and base plate layers are silk screened in a predetermined design to a sheet of paper-like material, printing ink is applied and then heat treated so as to form the sticker.

Abstract: A spray painting booth for electrostatically painting objects includes encapsulated electrically charged panels which are adapted to repel electrically charged paint particles that are produced by an electrostatic spray painting device. The electrostatic spray painting device is charged to a potential of 60,000 to 135,000 volts DC negative with respect to ground so that the resulting spray of paint particles is negatively charged. An object or article to be painted is disposed in the booth by a conveyor mechanism and is maintained at ground potential. The encapsulated, electrically charged panels or walls of the booth are charged to a potential of 30,000 volts DC negative with respect to ground by a power supply such that the panels are charged to a potential between the negative DC potential with respect to ground to which the spray paint device is charged and the ground potential of the article to be painted.

Abstract: A method for producing a replicated stone surface comprising the steps of preparing a polymer mortar, coating a substrate with the polymer mortar, leveling the polymer mortar to a substantially even thickness, creating a textured surface on the polymer mortar, applying a hydrophobic release agent to the surface of polymer mortar, displacing portions of the polymer mortar by pressing a patterned tool on the surface of the polymer mortar to form the plurality of simulated stones with raised peripheral edges and intervening simulated grout lines, allowing the polymer mortar to cure, applying a pigment to the surface of the plurality of simulated stones and simulated intervening grout lines, buffing the surface of the plurality of simulated stones and simulated intervening grout lines to impregnate the pores thereof with the pigment, abrading the surface of the plurality of simulated stones to create a weathered appearance and sealing the surface of the plurality of simulated stones and simulated intervening grou

Abstract: A process of allowing one to paint or draw on snow whereby a coloring agent, such as food coloring, is mixed with a gelling agent, such as household gelatin, and applied with a spray or squirt gun. When the gel solution contacts the cold snow, the gel solution quickly sets up and is prevented from dissipating as snow undergoes partial melting. When snow melts, the gel liquifies and disappears with runoff water.

Abstract: A process for applying deodorant particles to a membrane used for clothing in which the particles are applied from a liquid coating material that penetrates into the pores of the membrane, thus resulting in a higher concentration of particles in the surface coating than in the liquid coating material.