Metal Mold Patents (Class 427/135)
  • Patent number: 6506443
    Abstract: A method of applying surface-modifying auxiliary substances to the working area interior surfaces of die molds for the production of molded products, in particular made of rubber or plastics. The auxiliary substance is supplied in the form of a gas or vapor to the interior surfaces of the die mold, which is integrated into the processing machine, and the gas or vapor is condensed there.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: January 14, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Klaus-Jürgen Peschges, Steffen Kosack, Andreas Hartmann, Günter Hofmann
  • Patent number: 6461669
    Abstract: There provided a powder supply means for supplying a powdery mold releasing agent to a basin and a pressure reduction means for reducing a pressure in a cavity, and in a casting work the powdery mold releasing agent is supplied through a basin into a cavity while reducing a pressure in the cavity.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: October 8, 2002
    Assignee: Hanano Corporation
    Inventors: Takashi Hanano, Hisataka Shibuya
  • Patent number: 6361702
    Abstract: A die and a method for forming a die to produce optically varying effects in a light reflective surface. A design generally formed as a plurality of parallel grooves of varying widths and depths are engraved in a soft metal foil adhered to a substrate. A hard metal coating is formed on the engraved soft metal foil in a metal plating bath. The hard metal coating, removed from the soft metal foil provides a die formed as a mirror image of the grooves engraved in the soft metal foil. The die is used to deform a reflective surface such that the surface produces optically varying effects. A die formed in the same manner with further processing is used to both deform a reflective surface and hot stamp it to a substrate.
    Type: Grant
    Filed: January 28, 1999
    Date of Patent: March 26, 2002
    Inventor: Philip Joseph Grear
  • Patent number: 6314764
    Abstract: A method of manufacturing a 1-inch diameter glass substrate for a magnetic disc in which a plate glass is press molded using a mold formed of a super-hard material and having a surface of a prescribed roughness. Ion implantation using nitrogen ions is performed on the surface of the mold, after which ion implantation using palladium ions, platinum ions, and carbon ions is performed in the order given. Finally, the surface of the mold is coated with a graphite or amorphous diamond-like carbon coating.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: November 13, 2001
    Assignee: Saatec Engineering Corporation
    Inventor: Yasuaki Sakamoto
  • Patent number: 6314763
    Abstract: A method of manufacturing a 2-5 inch diameter glass substrate for a magnetic disc in which a plate glass is press molded using a mold formed of a super-hard material and having a surface of a prescribed roughness. Ion implantation using nitrogen ions is performed on the surface of the mold, after which ion implantation using palladium ions, platinum ions, and carbon ions is performed in the order given. Finally, the surface of the mold is coated with a graphite or amorphous diamond-like carbon coating.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: November 13, 2001
    Assignee: Saatec Engineering Corporation
    Inventor: Yasuaki Sakamoto
  • Patent number: 6291026
    Abstract: A method for forming a mold-release coating on a mold surface includes providing a coating of material on the mold surface. The coating of material has a surface which is capable of accepting and retaining a release powder. The method also includes depositing the release powder onto the coating of material. The release powder embeds the coating of material upon deposition thereby forming a mold-release coating.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: September 18, 2001
    Assignee: Polymerit
    Inventors: Bror H. Hanson, Douglas L. Hunter
  • Patent number: 6259035
    Abstract: A chip card has a chip module, wherein the surface of the chip module contains electrically conducting contact surfaces that are arranged to be aesthetically integrated into the layout of the chip card.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: July 10, 2001
    Assignee: ORGA Kartensysteme GmbH
    Inventors: Uwe Trüggelmann, Karlheinz Wendisch
  • Patent number: 6254927
    Abstract: An improved shimming process and release composition for filling the gap between a releasable composite skin and a supporting body with a liquid shim material, using a novel viscous liquid release composition free of volatile vehicle. The liquid release composition is viscous and easy to apply by brushing or wiping, and enables complete and clean release of the composite skin without delamination. The release composition is easy to clean from the parted surfaces of the cured shim material on the composite skin and the supporting body.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: July 3, 2001
    Assignee: Northrop Grumman Corporation
    Inventors: Haney Samuel Meda, Romeo Racsa Manansala
  • Patent number: 6228294
    Abstract: A compression molding method reduces or removes adhesion property between a mold substrate and a high polymer material, which is to be imprinted with a pattern from the mold substrate. Accordingly, a pattern having increased granularity to tens of A can be obtained for application to fabrication processes of semiconductor devices and electronic products. The compression molding method can use a patterned mold and preferably a high polymer material to be imprinted with the pattern. The method can further include heating one of the mold and the high polymer material, compression-molding the mold and the high polymer material, cooling the heated one for a prescribed time and separating the high polymer material and the mold from each other.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: May 8, 2001
    Assignee: Hyundai Electronics Industries Co., Ltd.
    Inventors: Hong Hee Lee, Dal Young Kang
  • Patent number: 6159535
    Abstract: The invention discloses a method and a device for applying a parting agent onto an injection mould, by means of which a powdery parting agent can be applied in a gush-free manner by means of pressurized air. For this purpose, the feed air and the dosing air for the powdery parting agent are turned on, increased, reduced and turned off in a controlled manner by means of predetermined turn-on and turn-off profiles.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: December 12, 2000
    Assignee: Wagner International AG
    Inventors: Bernd Lutz, Horst Adams
  • Patent number: 6159413
    Abstract: A laminated substrate is prepared, the laminated substrate having two layers including a first film and a second film in tight contact with the first film, the second film being made of a material capable of being etched with synchrotron radiation light. A mask member with a pattern is disposed in tight contact with the surface of the second film of the laminated structure or at a distance from the surface of the second film, the pattern of the mask member being made of a material not transmitting the synchrotron radiation light. The synchrotron radiation light is applied on a partial surface area of the second film via the mask member to etch the second film where the synchrotron radiation light is applied and to expose a partial surface area of the first film on the bottom of an etched area.
    Type: Grant
    Filed: June 16, 1998
    Date of Patent: December 12, 2000
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventors: Takanori Katoh, Yanping Zhang
  • Patent number: 6146558
    Abstract: A method for molding an optical disk comprises: applying a thermally insulative insert coating to at least one thermally insulative mold insert to provide at least one coated mold insert having a reduced surface roughness; positioning the coated mold insert between a thermally conductive mold form and a portion of a thermally conductive mold apparatus; injecting a molten thermoplastic material into the mold apparatus; retaining the material in the mold apparatus for a time sufficient for the molten thermoplastic material to cool below its glass transition temperature to form the optical disk; and ejecting the optical disk from the mold apparatus. In another embodiment, the mold insert is coated or laminated on the mold form with the mold insert having a coefficient of thermal expansion compatible with the coefficient of thermal expansion of the mold form. In another embodiment, the mold insert is fabricated by being applied, cured, and then removed from a release layer.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: November 14, 2000
    Assignee: General Electric Company
    Inventors: Thomas Paul Feist, Thomas Bert Gorczyca, Richard Joseph Saia, Paul Alan McConnelee
  • Patent number: 6143230
    Abstract: Plastic hoods and dividers are provided for use with row crop heads. The hoods and dividers are single walled and self-supporting. The single-walled hoods and dividers are preferably manufactured through a rotational molding process wherein a non-stick coating, such as polytetrafluoroethylene, is attached to portions of the mold.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: November 7, 2000
    Assignee: Case Corporation
    Inventors: John Andrios, Dathan Kerber, Brian Koesters
  • Patent number: 6136385
    Abstract: A surface reforming method of a metal product, wherein a platinum film is formed on the surface of a metal product by injecting onto that surface a nitrogen ion, a carbon ion and a platinum ion in that order, and then injected onto said platinum film a second platinum ion with the aim of improving the exfoliation resistance of the platinum film being formed on the metal surface, and the abrasion resistance of the surface.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: October 24, 2000
    Assignee: Saatec Engineering Corporation
    Inventor: Yasuaki Sakamoto
  • Patent number: 6117495
    Abstract: The method for forming a mold-release coating on a mold surface includes two basic steps: (a) providing a base coat of material on the mold surface and (b) electrostatically depositing a release powder onto the base coat of material. The base coat of material has a surface which is capable of accepting and retaining the release powder. Upon deposition of the release powder, the release powder embeds the base coat of material thereby forming a mold-release coating. The base coat may be a wax or a solvent base wax.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: September 12, 2000
    Assignee: Polymerit
    Inventors: Bror H. Hanson, Douglas L. Hunter
  • Patent number: 6033724
    Abstract: A coating system and method for a golf ball injection mold having a land area and a patterned wall defining a hemispherical cavity is characterized by the application of a primer and a fluoropolymer top coat layer at least the patterned wall. The combined thickness of the coatings is no greater than 0.0007 inches. Owing to the thin coating, a golf ball molded in the cavity is easily ejected therefrom.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: March 7, 2000
    Assignee: Spalding Sports Worldwide, Inc.
    Inventor: John Peter Molitor
  • Patent number: 5997709
    Abstract: Methods of providing diffusing risers on a fresnel lens die having a plurality of optical facets, wherein adjacent optical facets are separated by a riser, the method including the steps of depositing a difflusing layer on the plurality of optical facets and the risers, and selectively removing the diffusing layer from the plurality of optical facets, wherein the diffusing layer remains substantially intact on the risers. The diffusing layer can be deposited in an electrolyte bath substantially free of grain refiners.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: December 7, 1999
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventor: Harlan L. Krinke
  • Patent number: 5958469
    Abstract: A method for producing diffractive optic molding tools with improved durability is accomplished by depositing a layer of chromium carbide on a substrate material. This layer of chromium carbide becomes the receptor for a final machinable coating such as electroless nickel. The pattern for the desired diffractive surface is predetermined and a single-point-diamond turning machine is used to cut the negative of this predetermined pattern into the machinable layer to produce the pattern of concentric zones to the required depths. The pattern is then uniformly etched in the machinable layer down into the intermediate layer of chromium carbide resulting in the complete removal of all of the electroless nickel. In that the etching rates of electroless nickel and chromium carbide differ from one another, it is necessary to dimensionally adjust the negative pattern turned into the electroless nickel surface to allow for the different etch rates.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: September 28, 1999
    Assignee: Eastman Kodak Company
    Inventor: David A. Richards
  • Patent number: 5939135
    Abstract: A method of manufacturing a general type press forming knife-mould made of plain, soft and thin material, being comprised of selecting a medium, low carbon steel plate as a base whereon a knife edge having a desired contour is formed by shaping milling, then the knife edge or the knife edge together with the milled base being placed into a plating tank for hard chromium plating to increase hardness of the knife edge to Rockwell hardness 70 degrees; thereby, cost for material selection and cost of production of the knife-mould can be lowered, the life of use of the knife-mould can be prolonged, and the knife-mould can get a rust-proof effect by the method and is suitable for press forming of plain papers, card boards or plastic plates etc. on a knife-mould mounting machine.
    Type: Grant
    Filed: June 17, 1998
    Date of Patent: August 17, 1999
    Inventor: Ming-Te Wu
  • Patent number: 5935691
    Abstract: The subject invention relates to a type of metal dual-color extruded plastic key; said key comprising an electroplatable plastic material and a non-electroplatable plastic material; said two parts being subjected to plastic dual-color extrusion forming process; said non-electroplatable plastic material serving to produce a letter or figure; the area surrounding said non-electroplatable plastic material being the electroplatable plastic material; the surface of said electroplatable material being a layer of light-proof electroplated coating, to form the required metal surface; whereby the non-electroplatable plastic material being used to form the area where the letter or figure is to appear, so the lighting could permeate from the letter or figure; the above structure is so designed to provide a high added value to the key product with an exterior of excellent light permeability and comfortable touch.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: August 10, 1999
    Assignee: Silitek Corporation
    Inventor: Jason Tsai
  • Patent number: 5876804
    Abstract: An extrusion die for forming a honeycomb structure such as a catalyst carrier of a catalytic converter for internal combustion engines is provided. The extrusion die includes material inlet ports and latticed slits. The slits are formed in a die base and have first inner walls leading to an outer surface of the die base and second inner walls leading to the material inlet ports, respectively. Metal-plated layers are formed on the first inner walls of the slits to define outlets of the die and have the width smaller than those of the second inner walls of the slits, respectively. This die structure facilities easy extrusion of the honeycomb structure made up by thin honeycomb walls with a smaller extrusion resistance.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: March 2, 1999
    Assignee: Denso Corporation
    Inventors: Kunihiro Kodama, Hiroshi Furuhashi, Hiroshi Takatsu
  • Patent number: 5857512
    Abstract: A nail polish or nail polish/enamel composition is applied to imperfections, errors, distortions or porosities in the model. The composition is thus used to correct the model's shape. The composition can be added at room temperature, and avoids the need to utilize high temperatures in the process of building the model. The nail polish or nail polish/enamel compositions may be utilized to add jewelry design elements to the model.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: January 12, 1999
    Inventor: Michael Engel
  • Patent number: 5855966
    Abstract: A method for precison polishing non-planar, aspherical surfaces in substrates, particularly surfaces of molding tool substrates for molding optical surfaces therewith, which is accomplished by coating the non-planar, aspherical surface with a layer of material having a melt temperature which is less than a temperature at which the substrate will distort, heating the layer of material coated on the non-planar, aspherical surface to at least the melt temperature thereby flowing the layer of material to yield a surface tension smooth surface superimposed over the non-planar, aspherical surface, and etching the surface tension smooth surface down into the substrate to completely remove the layer.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: January 5, 1999
    Assignee: Eastman Kodak Company
    Inventor: David A. Richards
  • Patent number: 5837314
    Abstract: A method of and apparatus for employing a surfactant which is provided in order to assist in the release from each other of mold components of a multi-part mold employed in the molding of polymeric articles; for instance, such as a hydrophilic contact lens, upon completion of the molding process for the polymeric articles. The surfactant is applied in the form of a film or coating on surface portions of one of the mold components in order to facilitate the disengagement between the mold components during demolding, and the removal of excess polymeric molding material adhesively deposited on surfaces thereon.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: November 17, 1998
    Assignee: Johnson & Johnson Vision Products, Inc.
    Inventors: Stephen Robert Beaton, Wallace Anthony Martin, Ture Kindt-Larsen, Craig William Walker, Gregory Scott Duncan
  • Patent number: 5827567
    Abstract: Disclosed herein is a method of preparing a game ball mold cavity for application of a coating system. A dual region coating system for a game ball mold and a coating application method also are disclosed. The mold preparation method provides for a longer use of a game ball mold than results when conventional mold preparation techniques are used. The dual region coating system comprises a fluorocarbon polymer in the hemispherical opening of the mold cavity, and a metal, such as nickel, impregnated with a fluorocarbon polymer on the land area. The dual region coating system of the invention is particularly useful for making golf ball cores containing zinc-diacrylate and/or zinc dimethacrylate, as these materials tend to adhere to the walls of a mold cavity.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: October 27, 1998
    Inventor: John Peter Molitor
  • Patent number: 5783259
    Abstract: Described are molds, dies and forming tools comprising: a) a heat exchanging body support member; and b) within the support member, a molding cavity portion formed by thermal spraying metallic particles to a desired configuration in the support member. Also described are methods of making a mold, die or forming tool comprising the steps of: a) providing a body support member having a controlled and designed porosity which permits the enhancement of the heat transfer ability of said mold, die or forming tool; b) configuring a surface of the support member to a desired cavity; and c) spraying particles to the configured cavity in the support member, thereby producing a mold, die or forming tool. Preferably, the materials of construction are metallic and are applied by thermal plasma spraying. The particles may also be ceramics, metal matrix composites, ceramic matrix composites, thermoplastic resins, thermoset resins, and composites based thereupon.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: July 21, 1998
    Assignee: Metallamics, Inc.
    Inventor: Robert R. McDonald
  • Patent number: 5750160
    Abstract: A method of forming a nickel shell for a mold insert to reproduce an article surface, and a novel nickel shell insert are disclosed. The method comprises securing the article to be reproduced to a base having a perimeter, forming a dam about the perimeter, filling the interior of the dam with a silicone, mounting a register plate over the article within the dam in contact with the silicone, and allowing the silicone to cure whereby the silicone forms a negative master of the article surface, removing the negative master from the article and positioning a steel mandrel over the negative master to define a cavity therebetween, feeding a silicone which is not adherent to the negative master into said cavity to fill the cavity and allowing the silicone to cure whereby the silicone forms a positive master which adheres to the steel mandrel, removing the negative master from the positive master, and depositing a layer of nickel by nickel vapour deposition onto the positive master to form a nickel shell.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: May 12, 1998
    Assignee: Weber Manufacturing Limited
    Inventors: Reinhart Weber, Robert E. Sheppard
  • Patent number: 5702758
    Abstract: A method of application of finning preventive agent in an apparatus for casting anodes for electrolyzing copper by pouring molten copper into the molds, in which the inner planes of the molds can be coated with the finning preventive agent in a reliable and efficient manner, is provided. Before pouring molten copper into the molds, silicon oil is automatically applied to the inner planes 2a.sub.1 to 2a.sub.10 of the molds M dividedly in three applications by industrial robots 24, 25 of a vertical multi-articulate type having brushes 30. An amount of silicon oil consumed is 4 to 10 cc for one mold.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 30, 1997
    Assignee: Nippon Mining & Metals Co., Ltd.
    Inventors: Fumio Hashiuchi, Yushirou Hirai, Eiji Iwasaki
  • Patent number: 5658515
    Abstract: A mold assembly with micro-sized features in which the hollow portion thereof is fabricated from a sacrificial mandrel which is surface treated and then coated to form an outer shell. The sacrificial mandrel is then selectively etched away leaving the outer shell as the final product. The sacrificial mandrel is fabricated by a precision lathe, for example, so that when removed by etching the inner or hollow area has diameters as small as 10's of micros (.mu.m). Varying the inside diameter contours of the mold can be accomplished with specified ramping slopes formed on the outer surface of the sacrificial mandrel, with the inside or hollow section being, for example, 275 .mu.m in length up to 150 .mu.m in diameter within a 6 mm outside diameter (o.d.) mold assembly. The mold assembly itself can serve as a micronozzle or microneedle, and plastic parts, such as microballoons for angioplasty, polymer microparts, and microactuators, etc., may be formed within the mold assembly.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: August 19, 1997
    Inventors: Abraham P. Lee, M. Allen Northrup, Paul E. Ahre, Peter C. Dupuy
  • Patent number: 5618577
    Abstract: A multi-ply structure which includes a release coating sandwiched between two plies of the structure and present in an amount of about 5 to about 25 g/sq yd., one of the plies of the structure being flexible and in contact with the release coating and removable therefrom by the application of a force of between about 90 to about 600 g/in., as determined by the Keil test procedure, including a composition for forming the release coating and comprising an aqueous coating composition which includes a solids portion and which is effective in forming a coating having release properties, the solids portion of the composition comprising a major amount of resin binder and a minor amount of filler, the filler comprising a major amount of clay and a minor amount of magnesium or calcium hydroxide, and including also a continuous process for forming such multi-ply structure, including particularly a structure comprising a poly(vinyl chloride) ply strippable from a support ply.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 8, 1997
    Assignee: Congoleum Corporation
    Inventors: John D. Pearson, Salvatore Diodati
  • Patent number: 5609922
    Abstract: Described are molds, dies and forming tools comprising: a) a heat exchanging body support member; and b) within the support member, a molding cavity portion formed by thermal spraying metallic particles to a desired configuration in the support member. Also described are methods of making a mold, die or forming tool comprising the steps of: a) providing a body support member having a controlled and designed porosity which permits the enhancement of the heat transfer ability of said mold, die or forming tool; b) configuring a surface of the support member to a desired cavity; and c) spraying particles to the configured cavity in the support member, thereby producing a mold, die or forming tool. Preferably, the materials of construction are metallic and are applied by thermal plasma spraying. The particles may also be ceramics, metal matrix composites, ceramic matrix composites, thermoplastic resins, thermoset resins, and composites based thereupon.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: March 11, 1997
    Inventor: Robert R. McDonald
  • Patent number: 5593724
    Abstract: A pattern is provided in a glaze composition by a series of steps which includes patterning an at least partially cured fusible enameling composition by restructuring it through the removal of material therefrom, refiring the contoured restructure of the enameling composition, and then placing an uncured glaze composition onto the restructured, refined enameling composition. The glaze composition is placed in contact with the pattern in the enameling composition. The glaze composition is then cured. The cured glaze composition and enameling composition are then separated from each other to thereby provide the desired pattern in the glaze composition, without the cost, lack of convertability, and steps of stamping or forming metal to mirror the desired pattern. Also provided is the process for producing the pattern in the fusible enameling composition.
    Type: Grant
    Filed: November 9, 1994
    Date of Patent: January 14, 1997
    Assignee: The Burns & Russell Company
    Inventors: Russell P. Rich, James E. Whipps
  • Patent number: 5556666
    Abstract: Molding process of articles having color contrast areas on the surface comprising the coating of the surface or of part of the surface of the mold with a colored composition polymerized before filling the mold with a polymerizable fluid composition wherein the colored composition is a fluid, stable and redispersable dispersion, comprising:a) a solvent consisting essentially of polymerizable liquid monomers, optionally in admixture with a non-polymerizable volatile organic solvent;b) from 0.1 to 10% by weight of a color composition as inorganic pigment or from 0.0001 to 1% by weight of an organic pigment or organic dye;c) from 1 to 30% by weight of an unsaturated polyester resin soluble in the solvent a),the component a) being at least 20% by weight of the total composition.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: September 17, 1996
    Assignee: Atohaas Holding C.V.
    Inventors: Franco Marciandi, Marco Bertani
  • Patent number: 5431873
    Abstract: The tire mold having a surface 5 of open porosity which covers at least in art certain of the molding surfaces 10 and 20 in order to assure the venting of the mold.
    Type: Grant
    Filed: October 5, 1993
    Date of Patent: July 11, 1995
    Assignee: Compagnie Generale Des Etablissements Michelin - Micheline & Cie
    Inventor: Paul Vandenberghe
  • Patent number: 5393471
    Abstract: A pattern is provided in a glaze composition by a series of steps which includes patterning an at least partially cured fusible enameling composition by restructuring it through the removal of material therefrom, refiring the contoured restructure of the enameling composition, and then placing an uncured glaze composition onto the restructured, refined enameling composition. The glaze composition is placed in contact with the pattern in the enameling composition. The glaze composition is then cured. The cured glaze composition and enameling composition are then separated from each other to thereby provide the desired pattern in the glaze composition, without the cost, lack of convertability, and steps of stamping or forming metal to mirror the desired pattern. Also provided is the process for producing the pattern in the fusible enameling composition.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: February 28, 1995
    Assignee: The Burns & Russell Company
    Inventors: Russell P. Rich, James E. Whipps
  • Patent number: 5382274
    Abstract: A mold for use for press-molding an optical element, in which a molding surface of a mold base material is coated with a hard carbon film containing 0-5 atom% of hydrogen. It has a spin density of 1.times.10.sup.18 spin/cm.sup.3 or less and a film density of at least 1.5 g/cm.sup.3.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: January 17, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kiyoshi Yamamoto, Keiji Hirabayashi, Noriko Kurihara, Yasushi Taniguchi, Keiko Ikoma
  • Patent number: 5380349
    Abstract: A diamond sintered product having diamond particles sintered with a suitable sintering aid is the most suitable as the material for the mold for optical element molding, because it has in combination the advantage of diamond that no fusion with glass at high temperature occurs and oxidation occurs with difficulty to give rise to no precipitation of lead, an appropriate hardness and also the advantage that mirror polishing is possible. "There is also disclosed a mold which has a diamond layer having a (100) face, made by the CVD method utilizing gas having 1-3% methane in hydrogen.
    Type: Grant
    Filed: April 11, 1994
    Date of Patent: January 10, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasushi Taniguchi, Keiji Hirabayashi, Keiko Ikoma, Noriko Kurihara, Masaaki Matsushima, Kiyoshi Yamamoto
  • Patent number: 5356577
    Abstract: The invention relates to a process and apparatus for the controlled release of metered quantities of finely divided solids with one or more regulated venturi nozzles for the purpose of applying lubricant or separating compound to the stressed surfaces of pressing tools in tablet making machines or for applying finely divided solids to solid carrier materials particularly in the fields of pharmaceuticals, foodstuffs or catalysts.
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: October 18, 1994
    Assignee: Dr. Karl Thomae GmbH
    Inventors: Josef Boldis, Volker I. Glasel, Ekkehard Flaischlen, Gunther M. Voss
  • Patent number: 5318091
    Abstract: A metal casting die, and a method for its production, are described. By the method the die has provided over at least a part of its internal cavity forming surfaces, indentations of predetermined depth, area and distribution, by employing a technique selected from the group comprising photoetching, electrochemical etching and grit blasting. The die cavity forming surfaces also have thereon, over at least those surfaces with indentations, a coating of a hard, corrosion and erosion resistant material which extends into and between each indentation as a continuous layer.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: June 7, 1994
    Assignee: Borgo-Nova SpA
    Inventors: Mario Pavoni, Luigi Basile
  • Patent number: 5298556
    Abstract: An aqueous reaction mixture having a pH of 4.5 to 5.5 of a multi-functional polydimethyl siloxane emulsified polymer, a methyl triethoxy silane, a mixture of substituted nonyl and octyl phenol derivative surfactants, non-ionic fluorinated alkyl ester surfactant and synthetic ethoxylated amine surfactants, a silanol terminated polydimethyl siloxane and ethanol. The reaction mixture is coated on a mold core surface and cured with heat to form a mold release surface that can be used in excess of twenty times prior to recoating.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: March 29, 1994
    Assignee: TSE Industries, Inc.
    Inventor: William D. Stephens
  • Patent number: 5219925
    Abstract: An aqueous reaction mixture of a multi-functional polydimethyl siloxane emulsified polymer, a methyl triethoxy silane, a mixture of substituted nonyl or octyl phenol derivative surfactants and synthetic ethoxylated amine surfactants, and ethanol. The reaction mixture is coated on a mold core surface and cured with heat to form a mold release surface that can be used in excess of twenty times prior to recoating.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: June 15, 1993
    Assignee: TSE Industries, Inc.
    Inventor: William D. Stephens
  • Patent number: 5219608
    Abstract: A method of spraying release agent on a semiconductor chip molding die. The die has a pot for supplying resin to be molded, cavities in which semiconductor chips to be packaged are disposed, respectively, and a runner disposed between the pot and the cavities, for conducting the resin from the pot to the cavities. This method includes the steps of spraying at least the pot and the runner mentioned above with non-silicone release agent and selectively spraying only the cavities with silicone-based release agent.
    Type: Grant
    Filed: August 15, 1991
    Date of Patent: June 15, 1993
    Assignee: Sharp kabushiki Kaisha
    Inventors: Kazumasa Aoki, Kazuya Fujita, Hirofumi Uchida, Takaaki Tsuda, Takamichi Maeda
  • Patent number: 5202156
    Abstract: This specification discloses a mold for use for press-molding an optical element, characterized in that at least the molding surface of a mold base material is coated with an a-C:H film containing 5-40 atom % of hydrogen therein and having a film density of 1.5 g/cm.sup.3 or more, and with hard carbon film containing 0-5 atom % of hydrogen therein and having a spin density of 1.times.10.sup.18 spin/cm.sup.3 or less and a film density of 1.5 g/cm.sup.3 or more.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: April 13, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kiyoshi Yamamoto, Keiji Hirabayashi, Noriko Kurihara, Yasushi Taniguchi, Keiko Ikoma
  • Patent number: 5175929
    Abstract: An improved method of producing articles by chemical vapor deposition and articles made therefrom. The method comprises machining an appropriate shape on a suitable substrate, positioning an insert within the shape, depositing a support member material on the shape and the insert to produce a support member, separating the support member from the substrate, chemically vapor depositing an article material on the support member and etching away the support member to produce a free standing article, such as a funnel shaped diamond water-jet mixing tube.
    Type: Grant
    Filed: March 4, 1992
    Date of Patent: January 5, 1993
    Assignee: General Electric Company
    Inventors: Thomas R. Anthony, James F. Fleischer
  • Patent number: 5112025
    Abstract: A mold including a cavity the inner surface of which is at least partly coated with a layer selected from a diamond-like film and layers of fluorine and fluorine compounds. The mold is manufactured by a method which comprises placing at least a part of the mold which constitutes the surface portion of the mold cavity in a vacuum film-forming chamber, introducing a hydrocarbon gas into the chamber, ionizing the gas, and then evaporating it onto a desired surface portion of the mold, thus forming a diamond-like film over the mold portion. The mold portion is surface-treated by ionizing a low-molecular-weight fluorine compound into a plasma, forming a fluorine polymer film from the plasma on at least a part of the cavity surface, while applying a bias voltage to the plasma.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: May 12, 1992
    Assignee: TDK Corporation
    Inventors: Masatoshi Nakayama, Kunihiro Ueda, Toshihiko Ishida, Hiroshi Tanabe
  • Patent number: 5092558
    Abstract: Ceramic coated metal mold having a constant ceramic film thickness, which is superior in adhesion resistance and abrasion resistance, prepared by coating the inside and outside walls of a metal mold with ceramics, by the physical vapor deposition method. The ceramic coating is selected from one of TiC, TiN, and TiCN. The mold surfaces to which the coating is applied has a surface roughness of 1 S or less and the end corners have a radius R of 0.1-0.3 mm, to provide adhesion between the metal mold and the ceramic coating.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: March 3, 1992
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Akio Katsura
  • Patent number: 5089200
    Abstract: Process of melt extruding through an extrusion die whose surface is coated with one or more metal oxides, M.sub.x O.sub.y, wherein M is a metal selected from the group consisting of Ti, Zr, Cr, Fe, Ni, Pd, Pt, Cu, Ag, Au, Al and Si, and x and y are selected to satisfy the valencies of M, a difficultly-melt-processible polymer containing 0.002-2 parts by weight, based on the weight of the polymer, of at least one melt-processible fluorocarbon polymer processing aid having a fluorine to carbon ratio of at least 1:2 and having metal oxide-reactive sites capable of reacting with or physically associating with the metal oxide of the die surface.
    Type: Grant
    Filed: September 20, 1990
    Date of Patent: February 18, 1992
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: George R. Chapman, Jr., Rita S. McMinn, Donnan E. Priester, William L. Phillips
  • Patent number: 5064594
    Abstract: Improved process for extruding through a die a difficultly-melt-processible polymer, especially a polymer containing an additive such as an antiblock agent. There is first extruded through the die a polymer resin containing 0.001 to 1 wt. % of a copolymer of tetrafluoroethylene and a functional-group-containing monomer that is terminated in a -CF.sub.2 W group wherein W is selected from -SO.sub.2 F, -SO.sub.2 Cl, -SO.sub.3 M, -COOR and -COOM, R is a C.sub.1-3 alkyl radical and M is H, a metal cation or an ammonium or quaternary ammonium cation, and thereafter there is extruded through the die the difficultly-melt-processible polymer admixed with 0.001-1 wt. % of a fluoropolymer process said having a fluorine to carbon ratio of at least 1:2.
    Type: Grant
    Filed: September 20, 1990
    Date of Patent: November 12, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Donnan E. Priester, Robert E. Tarney
  • Patent number: 5039435
    Abstract: A die-casting powdery mold releasing agent according to this invention is a mold releasing agent comprising a mixture of powdery or granulated mold releasing base material composed of an inorganic compound as used for lubricant in a solid form and an organic compound giving adhesive property to the mold releasing agent, the both having powdery or granulated configurations, or configurations in which the organic compound is covered on the mold releasing base material. The mold releasing agent allows production of castings of high quality, in the die-casting method with good workability and without worsening environmental situations.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: August 13, 1991
    Assignee: Hanano Commercial Co., Ltd.
    Inventor: Takashi Hanano
  • Patent number: 5028251
    Abstract: For manufacturing a glass article for precision-optical purposes, a preform is provided which is unwrought relating to the desired shape of the glass article to be manufactured and exhibits within the surface areas serving for the formation of optical effective planes a high surface quality. The preform is pressed at a sufficiently high temperature in a mold, the function layers of which, serving for the formation of the optical suitable planes are hard and wear resistant, optionally containing hard nitrides and/or carbides, being mechanically unwrought structureless thin layers coated by cathode sputtering, for example, on a working surface of the basis of the mold. At the beginning of the pressing process, the preform and at least one of the function layers of the mold exhibit a difference in temperature amounting at least to 30 K, but less than a value where inhomogeneities in and/or surface defects on the glass molding may be produced.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: July 2, 1991
    Assignee: Schott Glaswerke
    Inventors: Martin Schinker, Johannes Brormann, Dieter Stahn, Walter Doll, Gunter Kleer, Peter Manns