Patents Represented by Attorney E. Kears Pollock
  • Patent number: 4182783
    Abstract: An apparatus and method are provided for fluidizing and vaporizing particulate solid coating reactants by first establishing a fluidized bed of dispersed particulant solid coating reactants and thereafter drawing a volume of fluidizing gas and suspended particulate solid coating reactant to a vaporizer while mixing an additional volume of gas therewith and then vaporizing the dispersed particulate solid coating reactant in the reactant-gas mixture. The reactant-gas mixture is then directed into contact with a hot substrate to be coated in order to deposit a film thereon.
    Type: Grant
    Filed: September 23, 1977
    Date of Patent: January 8, 1980
    Assignee: PPG Industries, Inc.
    Inventor: Vern A. Henery
  • Patent number: 4152135
    Abstract: A glass forming chamber for forming flat glass by a float method is provided with glass edge guide devices which extend through walls of the chamber and are externally supported. For each glass edge there is provided a device for positioning the glass edge guide to a desired position relative to the glass within the forming chamber and the walls of the forming chamber. The positioner comprises a drive support located adjacent the chamber with a drive device mounted on the support and a drive follower engaging a portion of the glass edge guide and engaging the drive to provide for positioning the glass edge guide responsive to the action of the drive.
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: May 1, 1979
    Assignee: PPG Industries, Inc.
    Inventor: Edward M. Kapura
  • Patent number: 4147556
    Abstract: A composition suitable for producing a metal oxide coating on the surface of a heated refractory substrate is disclosed. The composition comprises a metal beta diketonate dissolved in a nonflammable, high-boiling, halocarbon-containing solvent mixture. The solvent mixture has surprisingly high solubility for transition metal beta diketonates. Because of the nonflammability and high-boiling characteristics of the solvent mixture, the composition is particularly useful for coating freshly formed float glass.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: April 3, 1979
    Assignee: PPG Industries, Inc.
    Inventor: Harold E. Donley
  • Patent number: 4138239
    Abstract: A glass forming chamber wherein glass is formed while floating on the surface of a pool of molten metal is provided with a submerged plate in the pool of molten metal, which plate is contoured to divert the flow of molten metal in a central portion of the pool beneath an advancing layer of glass and to cause the flow of molten metal from the central portion into marginal portions of the pool or vice versa.
    Type: Grant
    Filed: October 7, 1977
    Date of Patent: February 6, 1979
    Assignee: PPG Industries, Inc.
    Inventors: Thomas J. Nier, Charles K. Edge
  • Patent number: 4116659
    Abstract: Method and apparatus are provided for circulating molten metal in a glass-supporting pool of molten metal in a direction counter to the advance of freshly delivered molten glass and outwardly into marginal spaces between glass restraining members and the side walls of the bath where it is subjected to forces establishing wave action in the surface of the pool of molten metal and then through means for dampening those waves to return the flow of molten metal to the main portion of the glass-supporting pool of molten metal whereby the metal can be purified and desirable thermal conditions can be established in the vicinity of the molten glass delivery onto the pool of molten metal.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: September 26, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Joseph Michael Matesa, Frank John Rau
  • Patent number: 4116661
    Abstract: A glass forming chamber wherein glass is formed while floating on the surface of a pool of molten metal is provided with submerged dam barriers in the pool of molten metal which dam barriers are contoured to inhibit the flow of molten metal in a central portion of the pool beneath an advancing layer of glass relative to the flow of molten metal in marginal portions of the pool including marginal portions between the edges of a floating layer of glass and side walls of the forming chamber.
    Type: Grant
    Filed: October 7, 1977
    Date of Patent: September 26, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Charles K. Edge, Thomas J. Nier
  • Patent number: 4115092
    Abstract: A method and apparatus are provided for inhibiting the generation, nucleation and growth of gas bubbles at a refractory surface in the vicinity of molten metal by providing a glaze of glass on the refractory surface, which glaze becomes viscous at the temperature reached in the apparatus during initiation of molten glass delivery such that some of the glaze is permitted to slough off from the refractory during initiation of molten glass delivery.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: September 19, 1978
    Assignee: PPG Industries, Inc.
    Inventor: James Edwin Neely, Jr.
  • Patent number: 4113507
    Abstract: A method is provided for preparing tin oxide film forming solutions wherein a heel of prepared filming solution is maintained in a mixing vessel and ingredients for a fresh solution are added thereto so that the viscosity of the solution is kept sufficiently low to improve mixing rates and with the effect that fuming and volatilization of the solution is substantially reduced during mixing.
    Type: Grant
    Filed: December 1, 1976
    Date of Patent: September 12, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Donald L. McHenry, Charles H. Bechtel
  • Patent number: 4111150
    Abstract: A coating apparatus employing a continuous traveling chain to move coating composition dispensers across a conveyer for coating glass traveling on the conveyer is provided with at least two sets of coating dispensers, all positioned for dispensing coating composition generally normal to a plane in which the chain travels, with the sets of coating dispensers actuated during separate portions of their travel along the path of the traveling chain in order to continuously produce multiple film coatings as the dispensers remain oriented throughout their travel in facing relation to the conveyer.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: September 5, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Harold E. Donley, William P. Cathers
  • Patent number: 4099950
    Abstract: A float glass forming facility employing a composite tweel and a wetback refractory piece, each having glass contact portions made of a glassy silica such as clear fused quartz, provides for the manufacture of glass which is substantially free of any fine seeds attributable to glass-refractory contact.
    Type: Grant
    Filed: August 4, 1977
    Date of Patent: July 11, 1978
    Assignee: PPG Industries, Inc.
    Inventor: George A. Pecoraro
  • Patent number: 4099952
    Abstract: A vented submersible dam barrier for use in a glass forming chamber to selectively interrupt the flow of glass supporting molten metal is disclosed. The disclosed barrier includes a dense inner body and an outer cover or shell with a space or interstices within the shell through which gases may move to an end of the dam barier at which there is mounted a facility for venting the enclosed portion of the dam barrier. Venting may be provided into a space above the surface of the pool of molten metal in which the dam barrier is placed.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: July 11, 1978
    Assignee: PPG Industries, Inc.
    Inventor: Ronald L. Schwenninger
  • Patent number: 4094763
    Abstract: Transparent, electroconductive articles produced by cathode sputtering on refractory substrates, a metal from the group of elements having an atomic number from 48 to 51 and mixtures thereof, and preferably a controlled proportion of tin to indium, in a low pressure atmosphere containing a controlled amount of oxygen at a controlled substrate temperature within a temperature range of 400.degree. F. to a temperature at which the substrate becomes distorted or detrimentally affected, usually at or above 600.degree. F.
    Type: Grant
    Filed: January 23, 1974
    Date of Patent: June 13, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Frank H. Gillery, Jean P. Pressau, Robert E. Kubichan
  • Patent number: 4092140
    Abstract: A plurality of high-temperature operating, corrosion-resistant heat pipes are employed to distribute heat transversely and longitudinally from normally hotter portions of a glass forming chamber to normally cooler portions of the same chamber in order to provide a more uniform thermal environment for the forming of flat glass. In particular, heat pipes are provided beneath the surface of a pool of glass-supporting molten metal in such a chamber to remove heat from a central and usually upstream region of such a chamber and transfer it to a marginal and preferably downstream region of the chamber. By transferring the heat in this manner, the temperature gradients within the chamber may be manipulated to be more uniform throughout a forming region so that glass of improved quality can be produced with improved efficiency, utilizing less energy than normally required for producing glass according to typical conventional float glass manufacturing methods.
    Type: Grant
    Filed: September 8, 1976
    Date of Patent: May 30, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Richard L. Cerutti, Vincent I. Henry, John E. Sensi
  • Patent number: 4092290
    Abstract: A sealant suitable for use with multiple glazed window units is disclosed. The sealant comes in the form of two relatively low viscosity components, each of which has an unlimited storage life. When it is desired to apply the sealant, the components are fed to an extruder and blended together to form an initially uncured cold flowable mastic material of relatively low viscosity. Because each of the two components of the sealant composition is of low viscosity and the initially uncured composite of the two components blended together is also of low viscosity, the sealant can be extruded at relatively low temperatures, thus preventing premature rapid curing and insuring that the sealant composition will have a low viscosity and be cold-flowable immediately after extrusion. The sealant is then cured in situ at ambient temperature over a period of several weeks to form a firm, tacky, resilient seal.
    Type: Grant
    Filed: May 30, 1975
    Date of Patent: May 30, 1978
    Assignee: PPG Industries, Inc.
    Inventor: George H. Bowser
  • Patent number: 4091156
    Abstract: Flat glass having superior optical quality is continuously produced by a contiguous float process in which lamellar flows are established in a molten glass conditioner and the flow patterns are maintained in a stream of glass unidirectionally delivered onto a pool of molten metal on which the glass is cooled and unidirectionally attenuated to form a ribbon of glass.
    Type: Grant
    Filed: June 13, 1974
    Date of Patent: May 23, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Charles K. Edge, Gerald E. Kunkle
  • Patent number: 4081262
    Abstract: A curtain of reducing gas is established across the entrance end of a glass forming chamber which employs a pool of molten metal to support glass during forming in order to impinge reducing gas along a line across a refractory delivery piece and molten metal region of the forming chamber in order to insure that molten glass is initially delivered onto molten tin free of contaminants, such as metal oxide.
    Type: Grant
    Filed: August 3, 1977
    Date of Patent: March 28, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Philip K. Fuhrman, Robert A. Greiner, Jr.
  • Patent number: 4081261
    Abstract: Direct communication is provided between a pool of molten metal in a glass forming chamber and coolers embedded within a refractory bottom liner of the chamber in order to provide for an enhanced rate of cooling along a path of glass advance through such a chamber.
    Type: Grant
    Filed: March 9, 1977
    Date of Patent: March 28, 1978
    Assignee: PPG Industries, Inc.
    Inventor: Robert L. Tilton
  • Patent number: 4072772
    Abstract: A surface of an article is coated by moving the article downstream through a linear curtain spray rinse applicator and thereafter through a linear curtain spray coating applicator. The rinse applicator and coating applicator are positioned relative to one another such that the rinsing spray and coating spray intersect at the surface of the article. The rinsing medium is applied as a spray having upstream frontal forces lying in a plane generally parallel to the surface of the article to provide the surface with a uniform thickness of rinsing medium film. The coating medium is applied to the surface of the article having downstream frontal forces lying in a plane generally parallel with the surface of the article to prevent the rinsing medium mixed with the coating medium from moving upstream into the coating spray. In this manner, the surface of the article is more uniformly coated.
    Type: Grant
    Filed: August 9, 1973
    Date of Patent: February 7, 1978
    Assignee: PPG Industries, Inc.
    Inventor: Helmut Franz
  • Patent number: 4069630
    Abstract: Improved thermal insulation between the inside of a building and the outside environment is provided by a multiple-glazed window comprising two transparent glass sheets, an exterior sheet and an interior sheet, spaced from each other and joined about their edges to form a sealed, enclosed space between them as the exterior sheet is a heat-absorbing glass having an infrared reflecting, transparent film of tin oxide disposed on its surface which faces the interior glass sheet in the window.
    Type: Grant
    Filed: March 31, 1976
    Date of Patent: January 24, 1978
    Assignee: PPG Industries, Inc.
    Inventors: James S. Chess, James A. Davis, Robert G. Spindler
  • Patent number: 4065626
    Abstract: Metal/metal oxide coated articles having selective reflectance and transmittance of radiation over an extended spectral range are provided by a combination of at least three coating layers: one being substantially copper, one being substantially copper oxide and one being substantially nickel disposed between the copper coating layer and the copper oxide coating. Chemical or electroless plating techniques are disclosed for the production of such articles.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: December 27, 1977
    Assignee: PPG Industries, Inc.
    Inventor: Helmut Franz