Patents Examined by Ralph S. Kendall
  • Patent number: 4321289
    Abstract: A cladding process and apparatus in which steel strip or sheet is cladded with a metal of lower melting point, e.g. lead, by maintaining a bank of constant level of the molten cladding material between a belt and the strip or sheet substrate which passes along an inclined path and is cooled to harden the molten material thereon. During the cooling process the applied material is compressed against the substrate.
    Type: Grant
    Filed: August 22, 1980
    Date of Patent: March 23, 1982
    Assignee: Norddeutsche Affinerie Aktiengesellschaft
    Inventor: Adalbert Bartsch
  • Patent number: 4319543
    Abstract: Apparatus for masking a selected area of the neck and/or sidewall of a container and for applying a coating to an adjacent area thereof. The apparatus comprises a container transport conveyor for transporting containers through a coating booth and a side masking conveyor for transporting side masks through the coating booth in parallel with the containers. As the containers move through the booth, the neck of the container is shielded by a neck mask carried by the container transport conveyor and a side portion of each container is shielded by a side mask carried on the side mask conveyor.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: March 16, 1982
    Assignee: Anchor Hocking Corporation
    Inventor: Herbert C. Shank
  • Patent number: 4318940
    Abstract: Metallic surfaces are imparted to non-conductive or dielectric substrates by an electroless (chemical) coating process comprised of coating the surface of the substrate with colloids of catalytic non-precious metals wherein the metals are either part of an alloy or in the elemental state or a compound and wherein the colloidal suspension further comprises antioxidant as to minimize the surface oxidation of the colloids and are further admixed in a manner resulting in good colloidal stability.
    Type: Grant
    Filed: July 26, 1979
    Date of Patent: March 9, 1982
    Assignee: Surface Technology, Inc.
    Inventor: Nathan Feldstein
  • Patent number: 4317846
    Abstract: Metallic surfaces are imparted to non-conductive or dielectric substrates by an electroless (chemical) coating process comprised of coating the surface of the substrate with colloids of catalytic non-precious metals wherein the metals are either part of an alloy or in the elemental state or a compound and wherein the colloidal suspension further comprises antioxidant as to minimize the surface oxidation of the colloids and are further admixed in a manner resulting in good colloidal stability.
    Type: Grant
    Filed: August 29, 1980
    Date of Patent: March 2, 1982
    Inventor: Nathan Feldstein
  • Patent number: 4317848
    Abstract: A method is described for metalizing, particularly zinc-coating of steel surfaces in such manner that the production of sewage and/or harmful waste products is substantially eliminated. The various steps employed include degreasing, etching, activation, and metallization of the metal substrate by successive immersion of the substrate in baths containing, respectively, the necessary components to perform the function of each bath and also the components of the preceding bath, recycling the wash products from each bath to a preceding bath containing the same components as said waste products, and rinsing the product with water only after completion of the successive method steps.
    Type: Grant
    Filed: April 17, 1980
    Date of Patent: March 2, 1982
    Assignee: Kombinat Produkcji i Montazu Obiektow Budownictwa Ogolnego z Lekkich Konstrukcji Stalowych "Metalplast"
    Inventor: Ryszard Mellerowicz
  • Patent number: 4317845
    Abstract: One side surface of a continuous metal strip is continuously brought into contacted with a surface of a molten metal bath. The surface of the molten metal bath is flowed to the directions departing from both edges of the strip by a linear induction motor dipped in the bath. A one side surface metal coated product having no deposition of a molten metal on the reverse surface is obtained by the method of the present invention.
    Type: Grant
    Filed: April 1, 1980
    Date of Patent: March 2, 1982
    Assignees: Asahi Glass Co. Ltd., Nihon Parkerizing Co.
    Inventors: Kunihiko Karasawa, Tokushiro Hosoda, Hiroshi Mase, Yasuo Sato, Shoji Shimada
  • Patent number: 4316752
    Abstract: The surface of a metal, namely, carbon steel (automotive steel), galvanized steel and/or aluminum, can be modified by treating the metal surface with a dilute aqueous oxalic acid solution. The resultant oxalic acid treated metal surface can be further treated with a phosphatizing bath. Such dual treatment improves the corrosion resistance of the metal surface and is particularly useful in the treatment of lighter weight automobile bodies having joints of carbon steel, galvanized steel and/or aluminum.
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: February 23, 1982
    Assignee: International Lead Zinc Research Organization, Inc.
    Inventor: Max Kronstein
  • Patent number: 4316751
    Abstract: Disclosed is a process for applying an electrical insulating coating onto a ferrous metal surface and the ferrous metal surface with the coating thereon. The insulating coating comprises phosphate and nitrate applied in a thin film of from about 200 mg to about 400 mg coating weight per square foot of ferrous metal surface coated.
    Type: Grant
    Filed: April 14, 1980
    Date of Patent: February 23, 1982
    Assignee: Hooker Chemicals & Plastics Corp.
    Inventors: Thomas J. Prescott, Raymond L. Wetzel
  • Patent number: 4315970
    Abstract: What is disclosed is a method of improving the adhesion of thin metal coatings to various solid substrates by pretreatment of the solid substrates using organofunctional silanes or mixtures of organofunctional silanes with organosilanes and thereafter depositing metals to form films or coatings.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: February 16, 1982
    Assignee: Dow Corning Corporation
    Inventor: James B. McGee
  • Patent number: 4315477
    Abstract: Disclosed is a semi-open method of growing an epitaxial HgCdTe layer on a CdTe substrate, including the steps of placing the CdTe substrate and a growth solution of Hg, Cd, and Te within a pressure and temperature controlled container, flowing an inert gas under pressure through the container to reduce the vaporization of Hg from the solution, establishing a cooling zone within the container to condense Hg vaporized from the solution, increasing the temperature of the solution for a time sufficient to react the Hg and Cd with the Te in the solution, reducing the temperature of the solution, establishing contact between the solution and the substrate, maintaining the solution at a temperature sufficient to melt the substrate for a time sufficient to eliminate a Hg vapor diffused layer, reducing the temperature of the solution to near the saturation temperature, and reducing the temperature of the solution at a rate sufficient to cause the solution to crystallize in an HgCdTe layer on the CdTe substrate.
    Type: Grant
    Filed: December 9, 1980
    Date of Patent: February 16, 1982
    Assignee: Rockwell International Corporation
    Inventors: Cheng-Chi Wang, August H. B. Vanderwyck
  • Patent number: 4314859
    Abstract: A mulit-colored decorative zinc or zinc alloy having locally organic dyestuff-dyed portions in multi-color is prepared by (1) dyeing with a dyestuff zinc or zinc alloy having a dyeable chromate film bonded thereonto, (2) polishing locally the dyed surface of zinc or zinc alloy, (3) making the chromate film on the exposed surface, (4) dyeing with same dyestuff in a different color density the chromate film on the exposed surface, and then the steps (2), (3) and (4) may successively be repeated.
    Type: Grant
    Filed: November 5, 1980
    Date of Patent: February 9, 1982
    Assignee: Mitsui Mining & Smelting Co., Ltd.
    Inventors: Nobuyoshi Kasahara, Koutarou Nonomura
  • Patent number: 4313769
    Abstract: In an acidic aqueous coating solution which contains zirconium, hafnium or titanium, and fluoride and which is effective in forming on an aluminum surface a non-chromate coating to which overlying coatings adhere tightly and which is corrosion resistant and resists being discolored when subjected to hot water, the improvement comprising including in said coating solution a surfactant in an amount such that a coating formed from the surfactant-containing coating solution has an improved tendency to resist being discolored by hot water.
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: February 2, 1982
    Assignee: Amchem Products, Inc.
    Inventors: Frank J. Frelin, Timm L. Kelly, Anthony J. Malloy
  • Patent number: 4314005
    Abstract: A process is described for thermo-chemically coating ferrous metal articles, especially small intricate ferrous articles. The process involves preparing a coating composition for homogenizing a complex of metal oxides and other solids in an organic liquid composition to obtain an emulsion, pre-heating the ferrous articles to an elevated temperature, immersing the pre-heated ferrous articles in the coating composition, withdrawing the articles and allowing them to cool.
    Type: Grant
    Filed: June 12, 1980
    Date of Patent: February 2, 1982
    Inventor: Jose V. Arias
  • Patent number: 4311536
    Abstract: The invention relates to a process of phosphating surfaces of iron and of steel with manganese.The abovesaid process is characterized by the fact on the one hand, that it does not include a refining treatment preceding the proper phosphating, and on the other hand, that the alkali degreasing bath has a pH of 9 to 12 and includes in suspension bivalent manganese in orthophosphate form.
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: January 19, 1982
    Assignee: Compagnie Francaise de Produits Industriels
    Inventors: Joseph Schapira, Victor Ken, Jean C. Masson, Francois J. Duboys
  • Patent number: 4311535
    Abstract: An acidic aqueous zinc-containing coating solution containing about 0.08 to about 0.2 weight percent of zinc, about 0.8 to about 3 weight percent of phosphate, about 0.05 to about 0.35 weight percent of chlorate, about 0.001 to about 0.1 weight percent of nitrite, and a complex fluoride ion having the following concentration:0.4.gtoreq.y.gtoreq.0.63x-0.042wherein x is the concentration of the zinc in weight percent and y is the concentration of the complex fluoride ion in weight percent. The coating solution is useful for forming on metal surfaces zinc phosphate coatings that exhibit excellent alkali resistance, good adhesion to a paint film, and good corrosion resistance after painting when used as an undercoat for the cationic electrodeposition of a paint film.
    Type: Grant
    Filed: May 1, 1980
    Date of Patent: January 19, 1982
    Inventors: Kiyotada Yasuhara, Masashi Takahashi, Ryoichi Murakami, Takashi Senzaki
  • Patent number: 4311114
    Abstract: In this invention yarn finish is supplied to the yarn applicator supply pan with the level controlled by intermittent admission of air to the top of a distribution tank through an air tube which is intermittently submerged and sealed with yarn finish at the same level as the supply pan. The tube opening is located within another tube connected to the bottom of the distribution tank with a tee which also connects to the supply pan. As the level of yarn finish in the supply pan drops due to use by the finish applicator, the level in the bottom tube also drops, uncovering the opening at the end of the top tube, permitting flow of air into the top of the distribution tank, releasing an equal amount of yarn finish through the tee and conduit to the supply pan, raising the level in the supply pan and the bottom tube until the opening of the top tube is covered and sealed preventing further flow of air until the level drops again due to use by the finish applicator, repeating the same intermittent supply process.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: January 19, 1982
    Assignee: Allied Corporation
    Inventors: Robert Lees, Marvin C. Jones
  • Patent number: 4310572
    Abstract: The occurrence of defects on wire coated with an aluminum-zinc alloy coating applied by hot dipping in a molten coating bath is substantially decreased by preventing the deposition of zinc powder particles upon the surface of the molten aluminum-zinc coating prior to solidification of the coating. The deposition of metallic zinc powder particles upon the molten aluminum-zinc coating may be alleviated in several different manners, including preventing the formation of the zinc powder, preventing the accumulation of the zinc powder upon the surface of the molten aluminum-zinc bath, decomposing the zinc powder before it accumulates and exhausting or removing the zinc powder from the vicinity of the molten metal coated wire as it leaves the molten bath. Several novel apparatus arrangements for accomplishing the above are disclosed.
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: January 12, 1982
    Assignee: Bethlehem Steel Corporation
    Inventor: Anthony J. Stavros
  • Patent number: 4309461
    Abstract: Method of preparing metallic compound materials for spectacle frames, watch casings, bracelets for watches and others, necklaces, and other decorative articles, which comprise a base made from austenite stainless steel, and an alloy of precious metals of a desired purity such as gold, platinum, and palladium which is selectively or partially laid over said base steel.
    Type: Grant
    Filed: May 15, 1980
    Date of Patent: January 5, 1982
    Assignee: Chugai-Duki Kogyo Kabushiki-Kaisha
    Inventor: Akira Shibata
  • Patent number: 4308079
    Abstract: It has been found that hydration of aluminum oxide surface coatings to aluminum hydroxide may be curtailed by the presence of corrosion inhibiting amounts of amino phosphonate compounds. Effective inhibitors, such as nitrilotris (methylene) triphosphonic acid, may be applied to aluminum substrates having aluminum oxide surfaces thereupon in concentrations of less than 50% by weight in aqueous solution, and suitably from 1 to about 500 ppm.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: December 29, 1981
    Assignee: Martin Marietta Corporation
    Inventors: John D. Venables, Maher E. Tadros, Brian M. Ditchek
  • Patent number: 4307130
    Abstract: A method of making the cathode of a diode image intensifier tube by evaporating some alkali metals and antimony on to the inner surface of a cathode window which by means of a layer of frit is joined to a metallic cathode flange, and in which there is provided between the cathode and the cathode flange, or, as the case may be, the cathode housing, an electrical resistance of a pre-determined value such that at light levels at which there is a danger of the anode being burnt, the diode image intensifier tube is defocussed or cut off, and wherein prior to the evaporation of the metals an alkali-resistant and insulating layer is applied to the frit layer, and that the evaporation of the antimony is carried out so that there is formed between the cathode and the cathode flange an area extending around the cathode and where no antimony is present, and that at least one galvanic connection is passed vacuum-tight outside the diode image intensifier tube, and one end of said connection is arranged at the place of the
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: December 22, 1981
    Assignee: NV Optische Industrie "De Oude Delft"
    Inventors: Lambertus K. van Geest, Johannes J. Houtkamp