Patents Examined by Ralph S. Kendall
  • Patent number: 4476805
    Abstract: Passed through a chamber holding a non-oxidizing atmosphere substantially horizontally, a steel strip is continuously coated on one side only with a molten coating metal. An electromagnetic pump imparts a thrust to the molten coating metal on the entry side of a guide so as to form a stream of the molten metal rising above the bath surface on the exit side of the guide. The rising molten metal stream contacts the bottom surface of the strip to form a film of the coating metal thereon. Provision is made to offer less flow resistance to the rising stream widthwise then lengthwise, so that the molten coating metal flows positively toward both edges of the strip.
    Type: Grant
    Filed: May 5, 1981
    Date of Patent: October 16, 1984
    Assignee: Nippon Steel Corporation
    Inventors: Seizun Higuchi, Kazuhiro Tano, Minoru Kamada, Susumu Okamoto
  • Patent number: 4416919
    Abstract: The invention relates to an apparatus and to a method for removing thickenings in layers which are produced transversely to the direction of travel of the web after the coating of continuously moving webs with liquids whereby the coated web is deflected by a web guide element and two air jets pointing towards each other are directed to a small angle .alpha. towards the layer of the web from below the deflecting point as air blades which are actuated when thickenings appear in the layer and which scrape off the particles of the thickening and blow them into a vacuum tank which is sprinkled all over with water and the water and particles are supplied to a vacuum generating device which, in turn, is evacuated by a jet suction device without interrupting the vacuum.
    Type: Grant
    Filed: May 13, 1981
    Date of Patent: November 22, 1983
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventor: Wilfried Beck
  • Patent number: 4385940
    Abstract: An anticorrosive treatment for preventing white rust on galvanized steels, comprises applying to the surface of a galvanized steel sheet an acidic solution containing molybdic acid or a molybdate in a concentration of 10-200 g/l calculated as molybdenum and adjusted to a pH value of 1-6 by addition of an organic or inorganic acid.
    Type: Grant
    Filed: January 12, 1981
    Date of Patent: May 31, 1983
    Assignee: Kobe Steel, Limited
    Inventors: Shigeki Kirihara, Tsutomu Ohshima
  • Patent number: 4374873
    Abstract: The metallic strip is displaced in a non-oxidizing gaseous atmosphere above and at a small distance from the surface of the coating bath and in contact with a coating cylinder driven to rotate in a direction opposite the direction of travel of the strip, so as to transfer onto the lower surface of the strip a thick layer of the coating material. Apparatus is arranged downstream of the coating cylinder to produce a jet of non-oxidizing gas directed to extend over the entire width of the strip, so as to adjust to a predetermined value the thickness of the coating layer.
    Type: Grant
    Filed: November 4, 1980
    Date of Patent: February 22, 1983
    Assignee: Phenix Works Societe Anonyme
    Inventors: Albert Piedboeuf, Victor Polard, Andre Cornez
  • Patent number: 4372996
    Abstract: A method including a novel bath is described for the nickeling of the aluminum pads of a chip, when either in die form or in wafer assembly. A near-neutral pH immersion zinc bath is used to cover the aluminum with zinc, which is followed by immersion in an electroless boron-nickel solution for nickeling of the zinc. The method eliminates the need to isolate the chip silicon from the plating bath.
    Type: Grant
    Filed: September 7, 1979
    Date of Patent: February 8, 1983
    Assignee: Massachusetts Institute of Technology
    Inventors: Elis A. Guditz, Robert L. Burke
  • Patent number: 4365583
    Abstract: A plating chamber holds a reducing or inert atmosphere heated to a temperature suited for plating or galvanizing. A pair of power-driven coating rolls are horizontally disposed in the plating chamber, one roll contacting the top surface of a metal strip to be plated and the other contacting the bottom surface. A molten coating metal is continuously supplied so as to form a uniform film of the metal on the peripheral surface of each coating roll. By means of deflector rolls horizontally disposed in the plating chamber, a metal strip heated to a temperature suited for plating continuously travels through the chamber. A surface of the strip becomes plated on contacting the peripheral surface of the coating roll on which the film of the molten coating metal has been formed. The coating rolls can be drawn away from the surface of the strip by shifting the deflector or coating rolls, so that plating can be applied to one, both or neither side of the strip as desired.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: December 28, 1982
    Assignee: Nippon Steel Corporation
    Inventors: Takahashi Hisashi, Hanai Satoshi, Yoshida Katsuyoshi
  • Patent number: 4364781
    Abstract: In the process of applying a layer of copper and a layer of zirconium dioxide to the internal surface of a tube of a zirconium-based alloy, with the layer of zirconium dioxide being located between the copper layer and the internal surface of the tube, the tube surface is first treated with an activating solution in the form of an aqueous solution containing from about 1 to about 3 grams/liter of hydrogen fluoride, from about 2 to about 8 grams/liter of ammonium fluoride and from about 0.1 to about 0.5 gram/liter of sulfuric acid, the amounts of hydrogen fluoride and ammonium fluoride being chosen so that the amount of ammonium fluoride, calculated in moles, exceeds the amount of hydrogen fluoride, calculated in moles, by at least 5 percent.
    Type: Grant
    Filed: February 18, 1981
    Date of Patent: December 21, 1982
    Assignee: AB Asea-Atom
    Inventor: Gunnar Vesterlund
  • Patent number: 4364978
    Abstract: The invention relates to a process for the high-temperature galvanization of steel parts containing from 0.01 to 0.6 percent by weight of silicon at temperatures of 470.degree. to 550.degree. C., the steel parts being immersed in a zinc melt containing lead in a quantity up to that maximally soluble at the operational temperature employed but containing at least about 2 percent by weight based upon the weight of the zinc melt. In this manner thick and uniform coatings of zinc are achieved.
    Type: Grant
    Filed: July 7, 1981
    Date of Patent: December 21, 1982
    Assignee: Th. Goldschmidt AG
    Inventors: Erwin Diehl, Wolfgang Muller, Artur Stroh
  • Patent number: 4364969
    Abstract: A process for improving the wear resistance of, and reducing the frictional forces between, bodies made of titanium or its alloys, in which surfaces liable to wear are coated with a layer of a metal such as tin of aluminium which is then bombarded with ions of a light species such as nitrogen, carbon, boron, or neon so as to cause the metal to migrate into the titanium.
    Type: Grant
    Filed: December 8, 1980
    Date of Patent: December 21, 1982
    Assignee: United Kingdom Atomic Energy Authority
    Inventors: Geoffrey Dearnaley, Robert E. J. Watkins
  • Patent number: 4360443
    Abstract: A static storage stable fire resistant hydraulic fluid composition is provided which comprises(a) from about 40 to about 50 volume percent water together with(b) from about 50 to about 60 volume percent of a combination of(1) a lubricating oil(2) an emulsifier system containing succinic esters of hydrocarbon substituted succinic acid, polyhydric alcohols and alkaline earth salts of a fatty acid, and(3) at least one material selected from the group consisting of polyoxyethylene derivatives of alcohols and acids.Most preferred materials are the ether derivatives of polyoxyethylene containing from 10 to 20 oxyethylene units formed from 10 to 20 saturated carbon atom normal alcohols. The most preferred material is the ether derivative of a polyoxyethylene containing 10 oxyethylene units formed from stearyl alcohol.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: November 23, 1982
    Assignee: Conoco Inc.
    Inventor: Albert M. Durr, Jr.
  • Patent number: 4359493
    Abstract: A method is disclosed for fluidizing and vaporizing particulate solid coating reactants by establishing a fluidized bed of dispersed particulate solid coating reactants, drawing a volume of fluidizing gas and suspended particulate solid coating reactant into a vaporizer while mixing an additional volume of gas therewith, and vaporizing the dispersed particulate solid coating reactant in the reactant gas mixture. The vaporized coating reactant may then be directed into contact with a substrate to be coated in order to deposit a film thereon.
    Type: Grant
    Filed: September 12, 1979
    Date of Patent: November 16, 1982
    Assignee: PPG Industries, Inc.
    Inventor: Vern A. Henery
  • Patent number: 4358506
    Abstract: As an article for manufacture, a tin, lead, indium, alloys of each with a carbide or carbonyl former in an admixture for forming said tin, lead and indium, wettable graphite composites which will not dewet upon heating; methods for preparing the composites of various shapes, layers, coatings, and sandwiches, of alloys, preforms and metal-graphite etc, structures are also disclosed.
    Type: Grant
    Filed: October 24, 1980
    Date of Patent: November 9, 1982
    Inventors: Josef Intrater, Gene Bertoldo
  • Patent number: 4358485
    Abstract: A method for forming a porous aluminum surface on an aluminum substrate using a potassium fluoaluminate brazing flux in critical weight ratio of 0.05 to 0.6 with an aluminum powder matrix component.
    Type: Grant
    Filed: March 17, 1980
    Date of Patent: November 9, 1982
    Assignee: Union Carbide Corporation
    Inventors: James W. Kern, Tommy M. Tetreault
  • Patent number: 4354449
    Abstract: Two side coaters and methods of coating paper on both sides are disclosed in which a web of paper to be coated is moved in a generally upward direction in partially wrapped relation to a coating roll, so that one side of the web is in contact with and supported by the roll. This one side of the web is coated by a first coating material which is applied by the coating roll. This coating material is applied to the coating roll by an applicator roll, either directly in which a puddle is formed between the applicator roll and the coating roll, or through transfer from a pair of metering rolls in which the coating puddle is formed between the metering rolls.
    Type: Grant
    Filed: October 9, 1980
    Date of Patent: October 19, 1982
    Assignee: The Black Clawson Company
    Inventor: Stanley C. Zink
  • Patent number: 4354881
    Abstract: A steel stock such as hot-rolled pickled steel plate, cold-rolled steel plate, cast iron or the like is subjected to antirust treatment with an aqueous solution or an emulsion consisting mainly of a 1-hydroxybenzotriazole compound represented by the general formula: ##STR1## where X and Y represent hydrogen atoms and hydroxy, alkyl, carboxyl, nitro and sulfonic groups, and further containing one or more of aliphatic dicarboxylic acids added thereto, and having a pH within the range of 7-10.
    Type: Grant
    Filed: May 5, 1981
    Date of Patent: October 19, 1982
    Assignee: Nippon Steel Corporation
    Inventors: Keiichi Tanikawa, Tatsurou Obi, Susumu Otsuka, Isao Manabe, Akiyoshi Inubushi, Chiaki Maeda
  • Patent number: 4353323
    Abstract: An apparatus for treating articles with a solvent, a solvent-containing liquid such as a lacquer, or with solvent vapors, comprises an open treating vessel provided with a device for raising and lowering the articles in the vessel and a heating unit at the bottom of the vessel for heating solvent therein. Around the wall of the vessel, above the bottom thereof, cooling tubes are provided which are connected to the cold branch of a heat pump so as to condense solvent vapors which can collect in a trough below these tubes and can be returned to a compartment of the vessel adjacent the treating compartment. The hot branch of the heat pump is connected via a heat exchanger to a water boiler and heat storage tank and the heater is connected to this boiler by a pump controlled by a control device responsive to the raising and lowering of the articles.
    Type: Grant
    Filed: April 22, 1981
    Date of Patent: October 12, 1982
    Assignee: Langbein-Pfanhauser Werke AG
    Inventor: Heinz Koblenzer
  • Patent number: 4351854
    Abstract: The invention relates to a method of protecting devices designed for the galvanization of metal products, in particular for the galvanization of continuous drive cylinders used when galvanizing sheet on a single surface. A surface layer of the cylinders is coated with one or more oxide, one or more silicate, one or more zirconate, one or more mixed inorganic compound. Examples of the oxides include Mg, Ca, etc. Examples of the silicates include Al etc. Examples of the zirconates include Mg etc. Examples of the mixed inorganic compounds include serpentines, amphiboles, silicon carbide. The oxides are applied directly to the cylinder surface to be formed "in situ", for example, by heating in air to approximately 1000.degree. C.
    Type: Grant
    Filed: November 18, 1980
    Date of Patent: September 28, 1982
    Assignee: Centre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie
    Inventor: Jacques Pelerin
  • Patent number: 4351266
    Abstract: An apparatus for dipping plating objects such as IC lead frame of a rectangular shape obtained by press forming and etching thin metal pieces, wherein a plural number of said rectangular sheets aligned and supported on the freely descending and returning rack base of the support carriage of the objects to be plated are concurrently subjected to dipping plating by determining the position of the said plural number of rectangular sheets to be plated for lowering into the plating tanks, and abutting the upper surface of the objects to be plated with the holding means thereby subjecting a plural number of objects to be plated.
    Type: Grant
    Filed: April 17, 1980
    Date of Patent: September 28, 1982
    Assignee: Electroplating Engineers of Japan, Limited
    Inventors: Masato Ando, Kenji Yamamoto, Kazuhiro Taniguchi
  • Patent number: 4351678
    Abstract: An improved corrosion resistant pipe and method of manufacture is presented wherein a phosphorus copper or phosphorus copper alloy pipe is subjected to a special heat treatment step which forms an internal oxide coating. A pipe produced in accordance with the invention is characterized as having a carbon content on the inside wall of 0.05 mg/dm.sup.2 or less and an internal oxide coating having a thickness ranging from 0.1 to 5 microns. Notably this improved pipe has a good resistance to corrosion, even when exposed to chemically agressive liquids.
    Type: Grant
    Filed: August 6, 1980
    Date of Patent: September 28, 1982
    Assignee: Usines a Cuivre et a Zinc de Liege
    Inventors: Yves Andrien, Christian Triquet
  • Patent number: 4351862
    Abstract: Metal strip is passed around a cylinder immersed in a bath of molten metal. Selection of one-sided or two-sided coating is made by selecting the position at which the strip enters and leaves the bath relative to the position at which the strip comes into and out of contact with the cylinder, by selecting the level of the bath surface or by moving an auxiliary roll.
    Type: Grant
    Filed: December 2, 1980
    Date of Patent: September 28, 1982
    Assignee: Centre de Recherches Metallurgiques-Centrum Voor Research In De Metallurgie
    Inventors: Paul Cosse, Jacques Pelerin