Abstract:
A method of forming a film of cooking oil on a pan surface wherein a mass of cooking oil is atomized to form droplets which are projected between a pair of electrodes having curved surfaces charged to a potential in a range between four and six kilovolts to electrically charge the droplets. The charged droplets are propelled at a velocity in a range between ten and twenty meters per second along a trajectory to impinge against an oppositely charged pan surface at an angle of greater than 45.degree. relative to the plane of the pan surface to form an oil film on the pan surface.
Abstract:
A process for the electrostatic lacquering of printed circuit boards formed with continuous holes as soldering places for connecting wires. The characterizing feature of the process is that the printed circuit boards, continuously conveyed in a suspended position, are lacquered on one side, then turned over, lacquered on the other side, and the two layers of lacquer are then immediately dried simultaneously. An apparatus for the electrostatic lacquering of printed circuit boards is also disclosed.
Abstract:
A method for increasing the efficiency of electrostatic deposition of particulate matter on a surface, which comprises preparing a dispersion of electrostatically charged particles of an active material to be deposited on the surface, wherein the particles of active material have an average radius of r.sub.p1 and a total volume of V.sub.L1, in a space adjacent to the surface which contains a dispersion of particles of an inert material, electrostatically charged with the same polarity as said particles of active material, wherein the particles of inert material have an average radius of r.sub.p2 and a total volume of V.sub.L2, wherein r.sub.p1 >r.sub.p2 and ##STR1##
Abstract:
An apparatus for applying a coating of an atomizable material, such as a phosphor slurry, to the inside surface of a glass tube comprises a rotatable member having a surface for receiving material, a device for rotating the member and conduct for delivering material to the surface of the member. The rotating and delivery mechanisms are preferably situated along the same direction as the extension of the axis of rotation through the surface of the member. The apparatus may include a device for electrically charging the material prior to coating. A method for applying the coating of atomizable material to the inside surface of a glass tube comprises positioning a rotatable member within the tube, delivering the material to a surface of the member adapted to receive the material, and rotating the member at a predetermined velocity to atomize the material and inpact the surface of the tube with at least a portion of the atomized material. A potential differnce may be established between the atomized material and the surface of the tube to improve coating efficiency. The surface of the tube may be maintained at an electrical potential, and multiple coatings may be produced.
Abstract:
A method of manufacturing a storm drain marker. The marker is constructed of a stainless steel plate with a front surface centrally disposed depression and a back surface that is recessed. The front surface is coated with a porcelain frit, and overlaid with a ceramic printed decal which is fused with the porcelain frit coating. The shaped plate forming an informational marker that can withstand long term exposure to the elements.