Inorganic Substrate Patents (Class 427/486)
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Patent number: 5811158Abstract: While plural kind of powder paints of different hues are mixed with each other without melting for preparation of a powder paint of a desire hue, a fluidity improver possessing a charge control function is simultaneously mixed into the powder paints without melting. The mixed powder paint containing the fluidity improver is charged, and then electrostatic powder coating is performed by the charged powder paint.Type: GrantFiled: April 22, 1997Date of Patent: September 22, 1998Assignee: Kao CorporationInventors: Shinichiro Yasuda, Masayuki Maruta, Yukiya Sato
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Patent number: 5773097Abstract: The electrostatic fluidized bed coating apparatus and system employ a vertically extending gaseous vortex of charged particles. Effects of variations in particle distribution, size, and electrostatic charge strength are minimized by the vertical orientation, enabling the production of coatings of exceptional uniformity. The apparatus is especially suited for construction to simultaneously coat a number of strands of wire or the like.Type: GrantFiled: April 22, 1996Date of Patent: June 30, 1998Assignee: Nordson CorporationInventor: Joseph Rogari
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Patent number: 5756164Abstract: An electrically chargeable dielectric coating powder and a triboelectric coating process for applying the powder to substrates are described. The coating powder is a mass of finely divided, heat fusible dielectric plastic material having an average particle size (Mv) of between 30 and 45 microns and a particle size distribution (all percents defined in weight percent) of:95%-100% smaller than 88 microns,5%-15% smaller than 15.56 microns and0%-6% smaller than 11 microns.Preferably the coating powder has 0% larger than 88 microns and an Mv=about 30-40, preferably 35-40 microns. More preferably the particle distribution further includes10%-15% smaller than 15.56 microns and4%-6% smaller than 11 microns, andan Mv of between about 35 and 36 microns. Most preferably the particle distribution further includes:about 11.5% smaller than 15.56 microns andabout 4.3% smaller than 11 microns, andan Mv of about 35.9. Preferably the powder is a thermosetting resin composition.Type: GrantFiled: January 22, 1997Date of Patent: May 26, 1998Assignee: Morton International, Inc.Inventors: Paul R. Horinka, Martin J. Korecky
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Patent number: 5753316Abstract: In one embodiment, the present invention relates to a method of treating metal surfaces including the steps: coating the metal surface with a film-forming sealcoat containing at least one organic resin and at least one torque modifier, with the proviso that if the metal surface is a phosphated metal surface, then no other film of a siccative organic coating other than the film-forming sealcoat is applied; and curing the film-forming sealcoat.Type: GrantFiled: January 14, 1997Date of Patent: May 19, 1998Assignee: PPG Industries, Inc.Inventors: Randall J. Brent, Robert D. Anthony
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Patent number: 5747150Abstract: An electrostatic powder coating method of forming an undercoating film having a volume specific resistivity of not more than 10.sup.13 .OMEGA..multidot.cm and a thickness of not more than 200 .mu.m on a metal surface and forming an overcoating layer on the undercoating film by electrostatic powder coating. The undercoating film is composed of a plurality of layers with only the top layer containing a conductive material.Type: GrantFiled: September 16, 1996Date of Patent: May 5, 1998Assignee: Nippon Paint Co., Ltd.Inventors: Masahiro Yamamoto, Akimitsu Uenaka, Tasaburo Ueno, Koichi Tsutsui
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Patent number: 5747153Abstract: Glass objects and glazed ceramic objects have a durable thin lustruous coating of a flux-free and frit-free inorganic based luster pigment particles. An application method comprises initially applying the pigment particles to a surface of the glass or ceramic object at a level of from about 0.1 gram to about one gram per square foot and then heating the surface to a temperature and for a time sufficient to fix the luster pigment particles directly to the surface. The resultant lustrous coating is less than about 25 microns in thickness.Type: GrantFiled: February 21, 1997Date of Patent: May 5, 1998Inventor: Harry C. McDaniel
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Patent number: 5731042Abstract: Fixtures composed of a combination of a metallic core coated with a fused plasticized vinyl chloride coating and an overcoating barrier which shields the coating from atmospheric exposure possess superior resistance against outdoor weathering. The overcoating barrier protectively shields the plasticized vinyl chloride coating from microbiological and sunlight induced degradation. The fixture maintains the compositional integrity and appearance of a freshly manufactured fixture notwithstanding prolonged exposure to normally deteriorative weathering (e.g. bright sunlight, hot and humid) conditions. If desired, the protective barrier may include traction imparting components which prevent slippage and improve upon surface traction. Thermosetting resins and especially the electrostatically applied powders particularly afford effective overcoating barriers for protectively shielding the plasticized vinyl chloride coating from degradation.Type: GrantFiled: November 7, 1995Date of Patent: March 24, 1998Inventors: James A. Glende, Russell K. Glover, III
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Patent number: 5731043Abstract: An electrically chargeable dielectric coating powder and a triboelectric coating process for applying the powder to wood substrates are described. The coating powder is a mass of finely divided, heat fusible dielectric plastic material having an average particle size (Mv) of between 30 and 45 microns and a particle size distribution (all percents defined in weight percent) of:95%-100% smaller than 88 microns,5%-15% smaller than 15.56 microns and0%-6% smaller than 11 microns.Preferably the coating powder has 0% larger than 88 microns and an Mv=about 30-40, preferably 35-40 microns. More preferably the particle distribution further includes10%-15% smaller than 15.56 microns and4%-6% smaller than 11 microns, andan Mv of between about 35 and 36 microns. Most preferably the particle distribution further includes:about 11.5% smaller than 15.56 microns andabout 4.3% smaller than 11 microns, andan Mv of about 35.9. Preferably the powder is a thermosetting resin composition.Type: GrantFiled: May 10, 1996Date of Patent: March 24, 1998Assignee: Morton International, Inc.Inventors: Paul R. Horinka, Martin J. Korecky
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Patent number: 5698269Abstract: This invention provides a process for electrostatically applying a coating composition onto dielectric materials which have a dielectric constant less than 4.0. In this process, a positive charge is induced onto a coating composition. The dielectric material is electrically isolated, negatively charge, or both. The positively-charged coating composition is sprayed onto the dielectric material. If the dielectric material is charged negatively, the process of the present invention further includes the step of maintaining at least a portion of the negative charge on the dielectric material while positively-charged coating particles are being sprayed thereon.Type: GrantFiled: December 20, 1995Date of Patent: December 16, 1997Assignee: PPG Industries, Inc.Inventors: Leland H. Carlblom, Donald B. Jones, Ken W. Niederst, Paul S. Chirgott
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Patent number: 5681623Abstract: An electrostatically clad conduit innerduct liner and method for making the innerduct are disclosed, The process includes, heating the innerduct to a temperature less than melting point of the innerduct or a powder to be coated on the inner surface of the innderduct, The powder to be coated is electrically charged and applied to the innerduct by spraying from a nozzle having a different polarity than the innerduct to provide a substantially uniform coating.Type: GrantFiled: January 27, 1995Date of Patent: October 28, 1997Assignee: Technology Licensing CompanyInventor: Michael W. Ferralli
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Patent number: 5648121Abstract: A fishing weight having an outer surface. The fishing weight is formed from a zinc alloy which is environmentally safe. It has a protective coating covering the entire outer surface. The covering is non-corrosive when exposed to water so that if it is chipped or broken, the environmentally safe zinc alloy of the weight will not contaminate the environment.Type: GrantFiled: April 11, 1995Date of Patent: July 15, 1997Inventors: Thomas W. Cornell, Jr., John L. Reinbold
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Patent number: 5618589Abstract: This method and apparatus provide for uniformly coating a hot elongate member with a powder coating. The elongate member and power carry an electrostatic charge which aids in providing the uniform powder coating. This method and apparatus electrostatically charge and heat the elongated member prior to entering a powder coating booth. In the booth, we sequentially discharge the powder coating, electrostatically charge the powder coating and then coat the elongated member with the charged powder coating. In one development, this method and apparatus uniformly powder coats window lineals directly on a pultrusion line.Type: GrantFiled: December 2, 1994Date of Patent: April 8, 1997Assignee: Owens Corning Fiberglas Technology, Inc.Inventor: Roger A. McFarland
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Patent number: 5614268Abstract: A composition for coating a metal surface which comprises at least one C.sub.6 to C.sub.10 carboxylic acid, at least one citric acid ester and an organic solvent. The composition provides improved anti-corrosion protection for an extended period of time and metal surfaces coated with the composition can be painted without first removing the coating.Type: GrantFiled: December 14, 1995Date of Patent: March 25, 1997Inventors: Michael J. Varley, John B. Thomas
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Patent number: 5552191Abstract: A triboelectric coating process for applying powder to substrates are described. The coating powder is a mass of finely divided, heat fusible dielectric plastic material having an average particle size (Mv) of between about 30 and 45 microns and a particle size distribution (all percents defined in weight percent) of:0-5% larger than 88 microns,85-95% larger than 15.56 microns and94-100% larger than 11 microns.Type: GrantFiled: December 20, 1993Date of Patent: September 3, 1996Assignee: Morton International, Inc.Inventors: Paul R. Horinka, Martin J. Korecky
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Patent number: 5542163Abstract: Disclosed are methods for enhancing the adhesion of composite electrodes onto metal foils (i.e., current collectors), to metal foils prepared by these methods and to electrolytic cells produced from these metal foils.Type: GrantFiled: August 3, 1994Date of Patent: August 6, 1996Inventor: On K. Chang
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Patent number: 5534309Abstract: A method of providing particle deposition on a semiconductor wafer or other surface first provides a flow of clean gas into a deposition chamber that purges the chamber prior to introduction of the wafer, and after introduction, continues the flow of clean gas. An aerosol is mixed into the clean gas flow for a desired length of time, so that as the combined flow passes through the deposition chamber particles are deposited on the wafer supported in the chamber. After the deposition has continued for either a desired particle count or a length of time, the flow of aerosol is discontinued, and a clean gas flow sheath is provided over the wafer as it is removed from the chamber. The apparatus carries out this method by providing a source of a clean gas, valves for controlling aerosol introduction into the clean gas, and a support for the wafer in the path of gas introduced into the chamber.Type: GrantFiled: June 21, 1994Date of Patent: July 9, 1996Assignee: MSP CorporationInventor: Benjamin Y. H. Liu
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Patent number: 5525370Abstract: A process for the preparation of a matte coating on an article is described, which comprises applying to said article a powdered thermosetting composition comprising as binder a mixture of a linear carboxyl group-containing polyester and a glycidyl group-containing acrylic copolymer and curing the thus coated article at a temperature of from 160.degree. C. to 210.degree. C. for a period of up to about 30 minutes. The polyester has an acid number of 20 to 50 mg KOH/g, and is the esterification product of a hydroxyl group-containing polyester with an organic dicarboxylic acid. The acrylic copolymer is obtained from 5% to 30% by weight of glycidyl acrylate or glycidyl methacrylate and 70% to 95% by weight of methyl methacrylate, whereby up to 25% of the total weight of methyl methacrylate can be replaced by another vinyl monomer, said acrylic copolymer having a number-average molecular weight (Mn) of from about 4,000 to about 10,000.Type: GrantFiled: January 13, 1995Date of Patent: June 11, 1996Assignee: U C B S.A.Inventors: Jean-Marie Hoebeke, Daniel Maetens, Michel Baudour, Jean-Marie Loutz
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Patent number: 5508064Abstract: A method for matting a recording medium comprises supplying a humidifying gas stream onto the outer periphery of an atomized stream of fine droplets of an aqueous solution containing a matting agent by atomizing device along the atomized stream for affixing the fine droplets on the recording material, drying the liquid material in a drying chamber for forming micro-projections of the matting agent. Convex-shaped micro-projections of the matting agent, strongly affixed on the recording medium, are formed without contaminating the working environment.Type: GrantFiled: December 17, 1993Date of Patent: April 16, 1996Assignee: Fuji Photo Films Co., Ltd.Inventor: Yasuhito Naruse
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Patent number: 5478372Abstract: A self-supporting laminate formed from an expanded polytetrafluoroethylene membrane material and a coated metal mesh material is described that is self-supporting and can be formed into a pleated filter member.Type: GrantFiled: February 8, 1995Date of Patent: December 26, 1995Assignee: W. L. Gore & Associates, Inc.Inventor: Stephen K. Stark
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Patent number: 5466736Abstract: Electrostatic spray paint formulations of alkyds, acrylics, nitrocellulose or polyurethanes having defined viscosity values and film forming solids content.Type: GrantFiled: June 16, 1994Date of Patent: November 14, 1995Assignee: The Morgan Crucible Company PLCInventors: Mark J. Spowage, Julia P. Grayson, Alan C. Outhwaite, Nighat Ahmed
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Patent number: 5455080Abstract: This invention is a blended powder mixture including a thermosetting resin and a solid, non-hydrolyzed, functional low molecular weight organosilane coupling agent. The powder mixture may be used to form a composite coating to protect a steel substrate from corrosion. The composite coating is formed by coating the substrate with an inorganic layer such as a silicate, depositing the powder mixture over the inorganic layer, heating the substrate to a temperature at least equal to the curing temperature of the resin and maintaining the substrate at the curing temperature for sufficient time to crosslink the resin and to diffuse the organosilane to the substrate whereby the crosslinked layer is coupled to the inorganic layer by the organosilane. The powder mixture includes 0.01-10 wt. % organosilane having a melting point no greater than the curing temperature of the resin. Preferred thermosetting resins include epoxy, polyester, epoxy-polyester, acrylic, acrylic-urethane or fluorovinyl.Type: GrantFiled: June 10, 1994Date of Patent: October 3, 1995Assignee: Armco Inc.Inventor: Wim J. van Ooij
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Patent number: 5453304Abstract: In a system and method for forming a metal oxide coating on glassware, heated glassware is provided in a coating zone, preferably by a grounded conveyor. An electrostatic charging and depositing field is established to a surface of the glassware in the coating zone, and a flow of metallic vapor is generated and introduced into the electrostatic charging and depositing field. The metallic vapor is electrostatically deposited on the surface of the heated glassware, and reacts with oxygen at the surface of the heated glassware to form a metal oxide coating on the surface of the glassware. The system and method can be used in either cold end coating or hot end coating, and can provide a dual cold end coating with an initial metal oxide cold end coating and a subsequent conventional cold end coating, providing improved surface lubricity at reduced costs.Type: GrantFiled: December 22, 1993Date of Patent: September 26, 1995Inventor: Addison B. Scholes
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Patent number: 5453295Abstract: Filiform corrosion of aluminum and of chrome-plated steel is prevented by covering the surface of the bare metal with a powder coating containing a major amount of a thermosetting resin selected from the group consisting of polyurethanes, polyesters, and acrylics; a minor, adhesion promoting amount of an epoxy resin; and either an ultra-violet light absorber or a hindered amine light stabilizer or a mixture of both, and baking the coated article to give a clear coating on the metal.Type: GrantFiled: January 15, 1992Date of Patent: September 26, 1995Assignee: Morton International, Inc.Inventors: R. K. Sammel, Paul H. Radcliffe
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Patent number: 5422145Abstract: A fluororubber-containing powder coating composition comprising a fluororubber, an adhesion-preventing material and optionally a cross-linking agent, which composition has an particle size of 10 to 2,000 .mu.m and an apparent density of at least 0.2 g/cc, which provides a homogeneous smooth coated film having no or only a small amount of bubbles.Type: GrantFiled: January 25, 1994Date of Patent: June 6, 1995Assignee: Daikin Industries, Ltd.Inventors: Nobuyuki Tomihashi, Masafumi Akamatsu, Yutaka Ueta
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Patent number: 5397605Abstract: In a method of electrostatic painting, the air to be conveyed towards the spraying nozzle (10) of a gun (9) together with the powdered paint, is enriched with at least one additive gaseous fluid consisting of at least one gas supplied from a feeding bottle (136, 137, 138, 139) and/or vapor obtained by submitting the air to bubbling through a working liquid (115). The additive fluid which has a greater electric conductivity than the air, causes an increase in the paint amount coated on the workpiece (11) in relation to the paint amount sprayed from the nozzle (10).Type: GrantFiled: May 18, 1993Date of Patent: March 14, 1995Inventor: Girolamo Barbieri
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Patent number: 5368885Abstract: To form a sparkle finish by powder coating, an opaque initial layer is first applied to a substrate, e.g., by powder coating. Then a mixture of glass flake and clear coating powder is prepared by blending. This mixture is then applied to a substrate, e.g., electrostatically, and heated to fuse and/or cure the coating powder.Type: GrantFiled: June 16, 1993Date of Patent: November 29, 1994Assignee: Morton International, Inc.Inventor: James G. Fotiou
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Patent number: 5346727Abstract: A process of coating a substrate such as aluminum by the steps of (a) applying thereon a powder coating composition prepared by (i) blending a mix containing a poly(vinylidene fluoride) resin, a thermoplastic resin, a pigment, and a vinylidene fluoride/tetrafluoroethylene/hexafluoropropylene terpolymer, (ii) pelletizing the blend from (i), and (iii) cryogenically grinding the pellets from (ii); (b) heating the powder coating composition above its melt temperature; and (c) cooling the coated substrate.Type: GrantFiled: July 13, 1993Date of Patent: September 13, 1994Assignee: Elf Atochem North America, Inc.Inventor: Benjamin Simkin
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Patent number: 5324546Abstract: A process for producing an adherent relief coating simulating the appearance of liquid droplets on a surface of an article such as a cosmetics container, including the steps of applying the coating by spraying the surface with a curable liquid coating material to form a multiplicity of discrete raised beads of the material distributed over the surface, and curing the applied coating. The beads can be formed by spraying the beading coat under conditions controlled to provide insufficient atomization to form a continuous uniform coating; by applying two successive coatings with silicon or silicone additive incorporated in the first coat to promote autoreticulation of the second coat; or by a combination of these techniques.Type: GrantFiled: October 7, 1992Date of Patent: June 28, 1994Assignee: Henlopen Manufacturing Co., Inc.Inventor: Edward B. Crutchley
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Patent number: 5316801Abstract: An epoxy powder is electrostatically charged and spray-coated onto the series loop connections 16, 18 of a dynamoelectric machine. With the series loop connections grounded, the electrostatically charged particles adhere to the connections and wrap about the front, back and sides of the connections to provide a substantially uniform thickness or build-up of the electrically insulating epoxy powder. With the series loop connections preheated, the epoxy will begin to melt and flow, further ensuring a uniform build-up and thickness about the connections. The spray-coating is then heat-cured, thereby affording electrically insulated series loop connections at the opposite ends of the dynamoelectric machine.Type: GrantFiled: November 25, 1992Date of Patent: May 31, 1994Assignee: General Electric CompanyInventor: James F. Hopeck
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Patent number: 5314723Abstract: In process for forming a coating of phosphor particles on a fluorescent lamp glass, a polymer is deposited on the phosphor particles and the phosphor particles are entrained in a carrier gas with the polymer in a non-adhering state, and then the phosphor particles are coated on the fluorescent lamp glass with the polymer in an adhering state for retaining the phosphor particles on the fluorescent glass and, the coated fluorescent glass is heated to a temperature above the decomposition temperature of the polymer for removing the polymer and to form a coating of phosphor particles on a fluorescent lamp glass.Type: GrantFiled: June 9, 1992Date of Patent: May 24, 1994Assignee: GTE Products CorporationInventors: Arunava Dutta, Lenoard V. Dullea
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Patent number: 5302419Abstract: An improved flexible towpreg article and a method of production therefor. The improved flexible towpreg article comprises a prepreg which comprises reinforcing filaments and matrix forming material comprising recycled plastics; the reinforcing filaments being substantially wetout by the matrix forming material such that the towpreg plies have a low void content compared to the multiply towpreg.Type: GrantFiled: March 9, 1992Date of Patent: April 12, 1994Assignee: Georgia Tech Research CorporationInventor: John D. Muzzy
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Patent number: 5284684Abstract: Electrostatic coating methods and apparatus are used to coat the exterior surface of glassware and preclude deposition on the interior surface and mouth of the glassware. A preferred stearic acid coating electrostatically applied over glassware with a hot end coating provides a more durable coating, improves scratch resistance and can reduce the amount of hot end coating for improved scratch resistance.Type: GrantFiled: March 3, 1992Date of Patent: February 8, 1994Assignee: Alltrista CorporationInventor: Addison B. Scholes
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Patent number: 5275849Abstract: The apparatus, system and method utilize sequential sprays of wet, low-temperature steam, and dry, high-temperature steam to clean the exterior of laminated objects as well as to effect volatilization of liquid contaminates trapped between lamina thereof. Water is injected into the conduit through which the low-temperature steam is delivered, so as to produce a desirable concentration of droplets therein. A conveyor moves the laminated objects along a horizontal path through zones in which they are sprayed by the low temperature and high temperature steam, and then through a zone in which they are electrostatically coated with powder.Type: GrantFiled: April 21, 1992Date of Patent: January 4, 1994Assignee: Electrostatic Technology, Inc.Inventors: Daniel Castelli, John Donahue, Donald J. Gillette, Bedrich Hajek
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Patent number: 5264255Abstract: A system for coating articles by the use of electrostatic attraction of ionized particles which are subsequently cured. The system includes a pair of carriers for jointly carrying each article through the system, from application of the particles to the article through curing of the particles on the article. Each carrier is capable of carrying the article independently of the other. After deposition of the particles on the article, the article and the carriers are conveyed through a cleaning station wherein one of the carriers is moved out of carrying engagement with the article and cleaned while the article supported by the other carrier. The other carrier is then moved out of supporting engagement with the article and cleaned while the article is supported by the first carrier.Type: GrantFiled: April 27, 1992Date of Patent: November 23, 1993Assignee: Blodgett & Blodgett, P.C.Inventor: Richard Salisbury
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Patent number: 5264254Abstract: An electrostatical powder coating method starts out from a metallic surface provided with an oil film as a protection against corrosion during storing and transportation. Resin powder is applied to the surface without prior removal of the oil film. The powder layer is melted in a furnace and subsequently hardened by cooling. It is preferred that an amount of heat is supplied by the furnace which is sufficient to evaporate the oil. Preferably, an oil is used which is stable during heating as long as it remains on the work piece surface. This includes the possibility that all of the oil or at least some components thereof diffuse and evaporate through the powder layer during heating or, alternatively, that part or all of the oil remains on the work piece during the heat treatment and mixes with the powder layer. In both cases the quality of the resin coating is not deteriorated by the oil film.Type: GrantFiled: September 23, 1991Date of Patent: November 23, 1993Assignee: Tegometall Rudolf BohnackerInventors: Ulrich Bohnacker, Thomas Probst
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Patent number: 5232746Abstract: Metallic substrates or substrates metallized at at least one surface are electrostatically powder coated with fluorinated polymers processable from the melt in admixture with 0.1 to 4% by weight of potassium titanate fibers.Type: GrantFiled: December 17, 1990Date of Patent: August 3, 1993Assignee: Hoechst AGInventors: Hermann Bladel, Hans-Jurgen Hendriock
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Patent number: 5208077Abstract: A composite material, particularly useful for prestressing concrete and in stay cables for cable-stayed bridges and other such uses where strength, corrosion resistance and resistance to fatigue failure are particularly important, comprises high strength wire strand coated and impregnated with an impermeable and strongly adherent epoxy based resin. The impregnated and coated epoxy increases the flexural stiffness of the composite against bending fatigue in the areas of the anchorages in dynamically loaded situations and reduces relative movement and rubbing of the wires of the strand so as to reduce fretting and hence fretting fatigue, the principal mechanism for failure in dynamically loaded strand.Type: GrantFiled: November 9, 1990Date of Patent: May 4, 1993Assignee: Florida Wire and Cable CompanyInventors: Dale D. Proctor, Denny M. Bucy, R. Terry Johnson, Michael R. Bradley
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Patent number: RE35879Abstract: The apparatus, system and method utilize sequential sprays of wet, low-temperature steam, and dry, high-temperature steam to clean the exterior of laminated objects as well as to effect volatilization of liquid contaminates trapped between lamina thereof. Water is injected into the conduit through which the low-temperature steam is delivered, so as to produce a desirable concentration of droplets therein. A conveyor moves the laminated objects along a horizontal path through zones in which they are sprayed by the low temperature and high temperature steam, and then through a zone in which they are electrostatically coated with powder.Type: GrantFiled: December 21, 1995Date of Patent: August 25, 1998Assignee: Electrostatic Technology, Inc.Inventors: Daniel Castelli, John Donahue, Donald J. Gillette, Bedrich Hajek