By Direct Application Of Vacuum Or Pneumatic Pressure Patents (Class 264/87)
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Patent number: 7059845Abstract: The element has at least one porous permeable impression surface, on which the clay slip is deposited. A drainage system for the slip fluid is provided having a relatively thin, empty or porous chamber in the form of a slab which is incorporated into the body of the mould element itself, is disposed within the range of drainage action of the impression surface, and has a degree of porosity greater than the front part of the body delimited between said thin chamber and the impression surface, evacuation means connected to said thin chamber being provided to evacuate the drained fluid collected by the chamber. In particular, said thin chamber is disposed substantially parallel to the impression surface at a relatively short distance therefrom.Type: GrantFiled: February 26, 2002Date of Patent: June 13, 2006Assignee: Sacmi Cooperativa Meccanici Imola Societa CooperativaInventors: Vasco Mazzanti, Paolo Figliano
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Patent number: 7056460Abstract: A process for making an improved gypsum/wood fiber board is described. Products resulting from the process are also described. The process comprises adding a diisocyanate, specifically methylenediphenyldiisocyanate (MDI) to an aqueous slurry of calcium sulfate material and cellulosic fibers, where the MDI is added as an emulsion stable in the conditions in which the slurry is maintained. The process further includes passing the MDI containing slurry onto a flat porous forming surface to form a filter cake; removing a substantial portion of the water from the filter cake through the porous surface; pressing the filter cake to form a board and remove additional water; and drying the board to remove the remaining free water.Type: GrantFiled: January 14, 2003Date of Patent: June 6, 2006Assignee: United States Gypsum CompanyInventor: Mark Englert
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Patent number: 7025909Abstract: A moving bed filtration process for the production of sphere based crystals is disclosed. Sphere based crystals having an opal-like structure or an inverse opal-like structure can be produced in accordance with the invention.Type: GrantFiled: May 4, 2004Date of Patent: April 11, 2006Assignee: EMD Chemicals, Inc.Inventors: Guoyi Fu, Diane Lewis
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Patent number: 7008509Abstract: A molded body formed with pulp mold having projected lines corresponding to a slit-shaped vent package part, capable of being provided by paper-making/dewatering, using a paper making mold, a slurry having fibers dispersed in a liquid so as to obtain a three-dimensional fiber wetted laminated body, moving the laminated body to a dry mold having an inner surface with the slit-shaped vent package, and pressing and drying that laminated body.Type: GrantFiled: August 4, 2000Date of Patent: March 7, 2006Assignee: Kao CorporationInventors: Kenichi Otani, Toshio Kobayashi, Toshiharu Togashi, Shingo Odajima, Tokihito Sono, Masayuki Osaki, Hiromichi Kimbara, Atsushi Sato
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Patent number: 7001551Abstract: A method of forming a bone composite, comprising: providing bone tissue; grinding said bone tissue to form ground tissue; molding the ground bone tissue into a bone composite; applying a binder to the bone composite; applying a vacuum to the mold, and optionally milling or refining the bone composite to the desired shape. Additionally, bone tissue composites made therefrom are included. The composites may be, for example, a bone pin, screw, or prosthesis.Type: GrantFiled: April 23, 2002Date of Patent: February 21, 2006Assignee: Allograft Research Technologies, Inc.Inventor: Thomas L. Meredith
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Patent number: 6994815Abstract: A high strength lightweight product formed from particulate inorganic materials such as a masonry building block is formed in a mould (1) from a flowable slurry of inorganic particularly materials and water. The interior of the mould is lined with perforate walls (2a, 3a, 4a, 3) fluidically coupled to a vacuum source (9). The fluid slurry contains entrained air and when pumped into the mound under superatmospheric pressure the gas bubbles contract in size. The fluidic mass is then subjected to subatmospheric pressure which enables the gas bubbles to expand the expel excess moisture from the mass.Type: GrantFiled: August 14, 2000Date of Patent: February 7, 2006Assignee: Applied Technology and Planning Pty Ltd.Inventor: Michael James Durack
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Patent number: 6946013Abstract: An improved, efficient, and regenerable exhaust emission filter and filter system are provided which incorporate the use of an inorganic, non-woven fiber filter element. The filter is able to capture exhaust pollutants and particulates through the interwoven nature of the filter element and due to area enhancements applied to the filter element including microscopic enhancements. The filter has an improved life and is able to combust a greater percentage of trapped particulates due to the high temperatures the filter element can withstand. The filter element if formed from a non-woven fiber block which is machined or shaped into a filter foundation. The filter element can have a multitude of coatings and catalysts applied and can be wrapped in insulation and a casing. The improved exhaust emission filter is particularly useful for diesel engine exhausts.Type: GrantFiled: October 28, 2002Date of Patent: September 20, 2005Assignee: GEO2 Technologies, Inc.Inventors: Gordon S. Alward, Robert A. DiChiara, Jr.
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Patent number: 6918997Abstract: A method of producing a pulp molded article comprising the steps of assembling splits (10, 11) each having a suction passageway and a papermaking screen (5) into a papermaking mold (1), filling the cavity of the papermaking mold (1) with a pulp slurry, discharging the liquid component of the pulp slurry through the suction passageway to deposit pulp fiber on the inner side of the papermaking screen (5) into an undried wet molded article, and dewatering the undried molded article deposited on the inner side of the papermaking screen (5), wherein the splits (10, 11) each have a large number of flow passageways (2) for feeding a purging fluid for cleaning the papermaking screen (5), and the purging fluid is ejected from the outer side of the papermaking screen (5) toward the cavity through the flow passageways (2) during the filling with the pulp slurry.Type: GrantFiled: April 16, 2001Date of Patent: July 19, 2005Assignee: Kao CorporationInventors: Minoru Goto, Keiji Eto
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Patent number: 6899794Abstract: A liquefied paper material is used as raw materials. A paper frame member 1 supporting a vibrating plate is paper-skimmed and formed. On paper-skimming and forming, a central hole for use in voice coils, air-release hole 1a releasing air pressure in a rear of the vibrating plate to outside due to vibration of the vibrating plate. A loudspeaker system is manufactured using the paper frame member 1.Type: GrantFiled: October 6, 2000Date of Patent: May 31, 2005Assignees: Mitsubishi Denki Kabushiki Kaisha, Morito Co., Ltd., Fuji Cone Seisakusho Co., Ltd., Foster Electric Co., Ltd.Inventors: Teruho Yamada, Masahiko Kawahara, Yukio Sugimoto, Seiji Mori, Toshikazu Iwasaki
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Patent number: 6863847Abstract: A moving bed filtration process for the production of sphere based crystals is disclosed. Sphere based crystals having an opal-like structure or an inverse opal-like structure can be produced in accordance with the invention.Type: GrantFiled: June 12, 2001Date of Patent: March 8, 2005Assignee: EM Industries, Inc.Inventors: Guoyi Fu, Diane Lewis
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Patent number: 6841041Abstract: A method for producing a pulp molded article (7) comprising the steps of supplying a pulp slurry into the cavity (1) of a mold (10) composed of a set of splits (3 and 4), the set of splits (3 and 4) being assembled together to form the cavity (1) with a prescribed configuration, to form a pulp deposited body (5), feeding a fluid into the cavity (1) to press the pulp deposited body (5) onto the inner wall of the cavity (1) for dewatering.Type: GrantFiled: January 2, 2003Date of Patent: January 11, 2005Assignee: Kao CorporationInventors: Yoshiaki Kumamoto, Kenichi Otani, Shinji Otakura, Tokuo Tsuura, Masataka Ishikawa, Toshiyuki Suga, Akira Nonomura
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Publication number: 20040262790Abstract: A moving bed filtration process for the production of sphere based crystals is disclosed. Sphere based crystals having an opal-like structure or an inverse opal-like structure can be produced in accordance with the invention.Type: ApplicationFiled: May 4, 2004Publication date: December 30, 2004Inventors: Guoyi Fu, Diane Lewis
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Patent number: 6833105Abstract: A process of manufacturing a sulfoaluminate or ferroaluminate cement, and an apparatus for the manufacture. The cement is manufactured from a mixture containing CaCO3, Al3 and/or Al(OH)3, CaSO4, SiO2 and/or a product containing silica or silicates such as clay, these compounds being present in the anhydrous or hydrated form. In this process, the mixture is treated up to clinkering by movement in a center of a kiln, in a sheet with approximately constant thickness, at approximately constant speed, along a treatment path having a positive temperature gradient, and for a treatment time during which the mixture remains below its melting temperature. The mixture is clinkered to produce a clinkered mixture that is cooled upon exit from the treatment path.Type: GrantFiled: August 21, 2001Date of Patent: December 21, 2004Assignee: Carrieres du BoulonnaisInventors: Guy Beauvent, Michel Deletter, Eric Holard, Jacques Tirlocq
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Patent number: 6832493Abstract: The present invention relates to a method for forming an optical device. The method includes providing a glass aggregate. Typically, the glass aggregate is a mixture of fine glass soot particles and coarser ground or milled glass powder. The glass particles are mixed with a liquid to form a slurry which is cast in a mold to form a porous pre-form. Subsequently, the porous pre-form is consolidated into a glass object by heating the pre-form at a relatively high temperature. The method of the present invention produces optical components having substantially no striae. As a result, scattering is substantially reduced when EUV light is reflected from a component produced from the optical blank.Type: GrantFiled: February 27, 2002Date of Patent: December 21, 2004Assignee: Corning IncorporatedInventors: Bradley F. Bowden, Kenneth E. Hrdina, John F. Wight, Jr., Chunzhe C. Yu
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Patent number: 6829908Abstract: The present invention relates to a method for forming an optical blank. The method includes providing a green body that has a non-porous exterior portion and a porous interior portion. The interior portion is evacuated to create a vacuum in the interior portion. The green body is then pressed using a hot isostatic pressing technique to densify the green body into a solid glass optical blank. This method produces homogeneous optical blanks having substantially no striae. The method also produces dense, inclusion free glass. As a result, scattering is substantially reduced when EUV light is reflected from a component produced from optical blank employing the method of the present invention.Type: GrantFiled: February 27, 2002Date of Patent: December 14, 2004Assignee: Corning IncorporatedInventors: Bradley F. Bowden, Kenneth E. Hrdina
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Patent number: 6830658Abstract: A method for producing a pulp molded article (7) comprising the steps of supplying a pulp slurry into the cavity (1) of a mold (10) composed of a set of splits (3 and 4), the set of splits (3 and 4) being assembled together to form the cavity (1) with a prescribed configuration, to form a pulp deposited body (5), feeding a fluid into the cavity (1) to press the pulp deposited body (5) onto the inner wall of the cavity (1) for dewatering.Type: GrantFiled: February 13, 2003Date of Patent: December 14, 2004Assignee: Kao CorporationInventors: Yoshiaki Kumamoto, Kenichi Otani, Shinji Otakura, Tokuo Tsuura, Masataka Ishikawa, Toshiyuki Suga, Akira Nonomura
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Patent number: 6818139Abstract: In a method for forming a micro-pattern on a substrate (200), polymer material having a solvent is coated on the substrate, thereby forming a polymer film on the substrate. Then, a mold (204) having a predetermined shape is compressed into the polymer film (202) on the substrate by employing a predetermined compression technique to entail a plastic deformation of the polymer film, thereby patterning the polymer film. This compression procedure is performed at a room temperature, e.g., of about 10 to about 30° C. In the present invention, before the mold (204) is pressed into the polymer film (202), a free volume in the polymer film is previously increased so that a pressure applied on the polymer material needed to plastically deform the polymer film is reduced. Thereafter, etching is performed on the substrate through the use of the patterned polymer film as an etching mask, thereby forming a micro-pattern on the substrate.Type: GrantFiled: October 15, 2001Date of Patent: November 16, 2004Assignee: Minuta Technology Co., Ltd.Inventors: Hong Hie Lee, Dahl Young Khang
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Publication number: 20040191525Abstract: A process for producing unmelted fibrous polytetrafluoroethylene (PTFE) resin from which multi-directional planar oriented structures such as sheets and planar shapes can be readily fabricated. Unfilled forms as well as filled and reinforced products are achievable. Novel composite-plied structures or unsintered sheets can be built by layering two (2) or more sheets containing functional fillers or reinforcements and then sintering said layers to provide a homogenous bond between all layered sheets. True reinforcement of formed fluoropolymer structures can be produced with tensile properties, which exceed the strength of virgin products. Microporous asymmetric membranes, which have decreasing pore size in a series of plies can be readily fabricated.Type: ApplicationFiled: March 27, 2003Publication date: September 30, 2004Inventor: Robert Roberts
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Patent number: 6773639Abstract: A method and system of forming a fire door core. Hydraulic binder and resin are supplied from raw material bins and mixed to provide a submixture. Exfoliated vermiculite is then mixed with the submixture to provide a mixture that is deposited into a plurality of compression molds. Each of the filled molds are pressed in a press at a predetermined temperature at a predetermined pressure for a predetermined period of time sufficient to harden the mixture into a hardened slab. The hardened slabs are then removed from the molds, impregnated with water or steam in a water impregnation assembly and dried in a drying assembly.Type: GrantFiled: October 10, 2001Date of Patent: August 10, 2004Assignee: Premdor International, Inc.Inventors: Hartley Moyes, Michael Windsor Symons
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Patent number: 6702966Abstract: A method is provided for manufacturing cement fiber sheets by supplying slurry primarily including fibers and cement as main material components onto a permeable sheet, and suctioning and dewatering the slurry. The method includes a foreign matter removing operation for removing foreign matter in the slurry material before supplying it to the permeable sheet, a thickness control operation for bringing the slurry to a specified thickness after the foreign matter removing process, and a leveling operation for smoothing the slurry surface after the thickness control process. Thus, treatment for foreign matter contained in slurry as well as thickness control, is throughly carried out, so that the product surface quality is ensured.Type: GrantFiled: June 30, 2000Date of Patent: March 9, 2004Assignee: Matsushita Electric Works, Ltd.Inventors: Shiniti Suzuki, Yoshiharu Ookubo, Hirosi Watanabe, Yasusi Sakamoto, Katunori Akiyama, Yosuke Tanaka
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Patent number: 6692678Abstract: An asbestos free, calcium silicate insulating material suitable for use in the casting of molten non-ferrous metals, and suitable for use in applications where a fire resistant, heat insulating, electrical insulating, and corrosion resistant material is desirable. The calcium silicate insulating material is produced by combining lime, a siliceous component, alumina silica microspheres, wollastonite and organic fibrous material in the presence of water to form a slurry. The slurry is then placed under steam pressure, to react the lime, siliceous component and water, dried, and heat treated if necessary.Type: GrantFiled: July 22, 2002Date of Patent: February 17, 2004Assignee: BNZ Materials, Inc.Inventors: Thomas R. Krowl, Bryan K. Doerr, Michael W. Borski
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Patent number: 6682671Abstract: An initial process for preparing material to use in manufacturing fiber-reinforced structures. One embodiment envisions a method of manufacturing a cement board. The initial process includes providing an open mat of recycled carpet fibers in a container, placing a mortar mixture directly over the fiber mat, distributing the mortar through the fiber mat by moving a comb having bent tines through the mortar-fiber mixture, and vibrating the mortar-fiber mixture substantially simultaneously with the distribution of mortar through the fiber. Also provided is a method for making the final product.Type: GrantFiled: May 18, 2000Date of Patent: January 27, 2004Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Grady A. Howell, Philip G. Malone, Joe Gain Tom, Charles Arthur Weiss, Jr.
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Patent number: 6582562Abstract: A mold with integral screen comprising a body of material having a surface, the body has a grid-like pattern of vacuum holes extending through the body of material and opening through said surface and permitting a vacuum to be supplied to said surface, a screen overlying said surface, said screen and said body being formed of the same material as the body and being integral.Type: GrantFiled: July 2, 2001Date of Patent: June 24, 2003Assignee: Regale CorporationInventors: Gregory W. Gale, Jeffrey J. Haugen
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Publication number: 20030080477Abstract: A method for making a thermal insulating material includes the steps of: providing a chamber, placing hollow geometric shapes in the chamber, closing the chamber, evacuating air from the chamber, feeding a slurry into an adjacent slurry chamber, pressurizing the slurry chamber and forcing the slurry in to the sphere chamber around the spheres against a fibrous material adjacent a side wall of the sphere chamber. The fibrous material allows capillary wicking of the liquid from the slurry around the spheres. Due to this pressure the spheres and slurry are semi dried into a green state. The material in its green state green is subsequently dried and fired to form the insulating material.Type: ApplicationFiled: September 27, 2001Publication date: May 1, 2003Applicant: Siemans Westinghouse Power CorporationInventors: Gary Brian Merrill, Jay Edgar Lane, Curtis Gosik
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Patent number: 6547931Abstract: A method for producing a pulp molded article (7) comprising the steps of supplying a pulp slurry into the cavity (1) of a mold (10) composed of a set of splits (3 and 4), the set of splits (3 and 4) being assembled together to form the cavity (1) with a prescribed configuration, to form a pulp deposited body (5), feeding a fluid into the cavity (1) to press the pulp deposited body (5) onto the inner wall of the cavity (1) for dewatering.Type: GrantFiled: October 10, 2000Date of Patent: April 15, 2003Assignee: Kao CorporationInventors: Yoshiaki Kumamoto, Kenichi Otani, Shinji Otakura, Tokuo Tsuura, Masataka Ishikawa, Toshiyuki Suga, Akira Nonomura
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Patent number: 6533976Abstract: A method of fabricating a discontinuous-fiber, ceramic matrix green-state composite component. The method includes preparation of a mixture of discontinuous fibers, in a quantity equal to about 100% of a desired end-product fiber quantity thereof, and a polymer-derived ceramic precursor resin in an excess quantity greater than about 150% of a desired end-product resin quantity thereof. The mixture so prepared then is introduced into a cavity of a molding tool and a vacuum is applied to the cavity through a vacuum aperture leading from the cavity. The mixture is drawn toward the vacuum aperture and consequently compacts a quantity of fibers within the cavity at the aperture site such that the fibers function as a filter to efficiently retain within the cavity fibers within the original mixture while removing under vacuum the excess resin that provided an effective vehicle for carrying and dispersing the discontinuous fibers.Type: GrantFiled: March 7, 2000Date of Patent: March 18, 2003Assignee: Northrop Grumman CorporationInventors: Thomas Edward Strasser, Mark William Bland, Steven Donald Atmur
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Patent number: 6531078Abstract: Disclosed is a method of producing a non-woven web of fibrous or particulate material comprising: formation of a foam slurry; deposition of that slurry onto a foraminous element having a three-dimensional mold; and formation of a web having a three-dimensional shape that is not substantially planar by removal of foam from the slurry through the foraminous element and drying the web. An apparatus therefor is also disclosed. The method may be used in production a variety of products, including automotive pleated fluid and air filters, pleated heating and/or air conditioning (HVAC) filters, shaped breathing mask filters and bacterial filters, laminated cleaning products with super-absorbent middle layers, such as a mop wipe shape to fit a cleaning mop head, and other products.Type: GrantFiled: February 26, 2001Date of Patent: March 11, 2003Assignee: Ahlstrom Glassfibre OyInventors: Eino Laine, Kay Rökman, Hanna Rahiala, Jonathan George, Andrea Grosso
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Patent number: 6517684Abstract: Method of manufacturing articles from an aqueous fibre suspension, by deposition of fibres on a suction mould (2), comprising the steps of: applying suction to the suction mould, supplying a fibre suspension to the mould by immersing the suction mould in a vat (5) containing the fibre suspension, raising the suction mould from the fibre suspension, flowing ambient air by said suction through an article formed by a layer of fibre material deposed on the suction mould, characterised by the steps of: providing a substantially hermetically sealed space over the article or articles on the suction mould, supplying a de-watering fluid to the sealed space, and flowing substantially exclusively the de-watering fluid through the article or articles.Type: GrantFiled: June 7, 2001Date of Patent: February 11, 2003Assignee: Brodrene Hartmann A/SInventor: Niels Juul
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Patent number: 6491862Abstract: Disclosed is a method for producing an SiC preform of a high volume fraction used for the manufacture of a metal matrix composite. The method involves the steps of mixing SiC particles of different particle sizes each selected from a range of 0.2 to 48 &mgr;m with an organic binder, an inorganic binder, an aggregating agent, and distilled water, thereby producing a mixture, and stirring the mixture in accordance with a ball milling process, thereby producing a slurry containing the SiC particles, pouring the slurry containing the SiC particles into a mold having upper and lower molds respectively provided with absorbent bodies, and squeezing the slurry in the mold, thereby reducing a residual moisture content of the slurry, completely drying the slurry reduced in residual moisture content, thereby producing an SiC preform, and calcinating the SiC preform. The preform is impregnated with a metal matrix while maintaining a high reinforcement volume fraction of 70 vol % or more.Type: GrantFiled: October 17, 2000Date of Patent: December 10, 2002Assignee: Korea Advanced Institute of Science and TechnologyInventors: Soon Hyung Hong, Hyo Soo Lee, Kyung Yoon Jeon
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Patent number: 6475411Abstract: A method of making an adsorbent carbon fiber based monolith having improved methane gas storage capabilities is disclosed. Additionally, the monolithic nature of the storage carbon allows it to exhibit greater thermal conductivity than conventional granular activated carbon or powdered activated carbon storage beds. The storage of methane gas is achieved through the process of physical adsorption in the micropores that are developed in the structure of the adsorbent monolith. The disclosed monolith is capable of storing greater than 150 V/V of methane [i.e., >150 STP (101.325 KPa, 298K) volumes of methane per unit volume of storage vessel internal volume] at a pressure of 3.5 MPa (500 psi).Type: GrantFiled: July 26, 2000Date of Patent: November 5, 2002Assignee: Ut-Battelle, LLCInventors: Timothy D. Burchell, Michael R. Rogers
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Patent number: 6468398Abstract: Pulp deposited bodies (7 and 8) are formed on the surfaces (2a and 3a) of a set of splits (2 and 3) of a papermaking mold, each split having a plurality of interconnecting holes connecting the outside to the inside thereof, and the splits (2 and 3) are mated to join the pulp deposited bodies (7 and 8).Type: GrantFiled: August 23, 2000Date of Patent: October 22, 2002Assignee: Kao CorporationInventors: Yoshiaki Kumamoto, Shinji Otakura, Kenichi Otani, Shingo Odajima, Tokuo Tsuura
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Publication number: 20020145234Abstract: An improved method and apparatus for imparting a smooth surface to a gypsum fiber panels. The method involves imparting energy to the surface of the slurry as the slurry is dewatered just prior to rehydration. The apparatus used to impart the energy is an air lance including an air source such as a blower, a distribution manifold and a plurality of nozzles to direct the flow of air at the surface of the slurry. In operation, the air lance directs a flow of air against the surface of the slurry. The flow disrupts the slurry to a fraction of its total depth, thus dispersing clumps or flocs of crystals in the depth that would give the surface of the finished panel a rough surface if they were allowed to remain.Type: ApplicationFiled: May 31, 2002Publication date: October 10, 2002Inventor: David Paul Miller
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Patent number: 6461480Abstract: A pulp molded article is produced by depositing pulp fiber on the outer surface of a papermaking core mold having a plurality of interconnecting paths connecting the outside and the inside to form a pulp deposited body, placing the pulp deposited body in a set of split molds, and then pressing the pulp deposited body for dehydration by a prescribed means.Type: GrantFiled: August 23, 2000Date of Patent: October 8, 2002Assignee: Kao CorporationInventors: Shinji Otakura, Yoshiaki Kumamoto, Kenichi Otani, Tadaharu Ogawa, Atsushi Sato
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Patent number: 6454906Abstract: A process for producing a pulp molded article comprising inserting a hollow inflatable pressing member 81 which has been made small so as to have smaller cross-sectional contour into a cavity 4 of a mold 1 in which a pulp layer 7 has been formed, and feeding a pressurizing fluid into the inserted pressing member 81 to inflate the pressing member 81 thereby to press the pulp layer 7 onto the inner wall of the cavity 4.Type: GrantFiled: February 14, 2000Date of Patent: September 24, 2002Assignee: Kao CorporationInventors: Akira Nonomura, Atsushi Sato, Tokuo Tsuura, Yasushi Yamada, Hiroaki Kobayashi, Shingo Odajima, Tokihito Sono
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Patent number: 6451235Abstract: A method is disclosed for forming from a fiber slurry a three-dimensional fiber truss. The forming method involves compressing a fiber slurry or a fiber pulp between a pair of rigid foraminous dies to rapidly drive out most of the carrier fluid. The fiber retained between the dies is compacted into a pre-form fiber truss. The pre-form fiber truss is subsequently dried and consolidated in a heated press to produce a finished fiber truss. In panel applications, the fiber truss can be used by itself, or combined with other fiber trusses, to form a light-weight structural core for sandwich panels. Sandwich panels have numerous uses in packaging, material handling, construction, and furniture industries. Specific products include bulk bins, heavy-duty boxes, shipping containers, wall panels, roof panels, cement forms, partitions, poster displays, reels, desks, caskets, shelves, tables, and doors.Type: GrantFiled: April 26, 2000Date of Patent: September 17, 2002Inventor: Thomas L. Owens
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Patent number: 6447906Abstract: The present invention provides molded fireplace articles comprising a plurality of non-white inorganic fibers that are substantially uniformly coated with a colored metal oxide. The present invention further provides a method of manufacturing molded fireplace articles comprising: providing a plurality of non-white inorganic fibers; mixing the fibers with a binder and a liquid to form a slurry; pouring the slurry into a mold having a desired shape; and forming the slurry into a shaped article. A method of preparing non-white inorganic fibers is also provided, the method comprising the steps of: providing a colorant solution formed by dispersing or dissolving a metal compound into a carrier liquid, providing an inorganic fiber, applying the colorant solution to the inorganic fiber to form a colorant coated fiber, and heating the colorant coated fiber to a temperature sufficient to decompose the metal compound to a non-white metal oxide that is substantially uniformly coated on said fibers.Type: GrantFiled: November 30, 1999Date of Patent: September 10, 2002Assignee: Unifrax CorporationInventors: Michael J. Andrejcak, Bruce K. Zoitos
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Publication number: 20020119299Abstract: A process for manufacturing wet-felted and thermally bonded porous structures is provided to produce formed porous media for use in filters with improved filtration performance. The process includes the steps of forming a slurry with a primary media consisting of natural or synthetic fibers, a wet strength agent consisting of fibrillated fibers, and a binding agent; vacuum forming the slurry to produce a formed media; drying the formed media using a gas at a temperature below the melting temperature of the binding agent; bonding the formed media using a gas at a temperature above the melting temperature of the binding agent; and cooling the formed media using a gas at ambient temperature. The process produces a formed porous media with improved bonding which results in improved filtration performance.Type: ApplicationFiled: February 26, 2001Publication date: August 29, 2002Inventors: Wei-Chih Chen, Katharine L.K. Faye, Mark Schimmel
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Patent number: 6428643Abstract: A method of casting toilets and the like where the bowl and rim are separately molded and then connected together while both are in an upside down position. During the connection of the rim to the bowl, the bowl is preferably supported on two opposing sides by the mold. These procedures reduce deformation of the cast bowl while it is still in a “greenware” condition. An apparatus for carrying out this method in an automated manner is also disclosed.Type: GrantFiled: November 19, 1999Date of Patent: August 6, 2002Assignee: Kohler Co.Inventors: Walter S. Bergquist, Frank P. Williams, Harold A. Teague
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Patent number: 6416695Abstract: An improved method and apparatus for imparting a smooth surface to a gypsum fiber panels. The method involves imparting energy to the surface of the slurry as the slurry is dewatered just prior to rehydration. The apparatus used to impart the energy is an air lance including an air source such as a blower, a distribution manifold and a plurality of nozzles to direct the flow of air at the surface of the slurry. In operation, the air lance directs a flow of air against the surface of the slurry. The flow disrupts the slurry to a fraction of its total depth, thus dispersing clumps or flocs of crystals in the depth that would give the surface of the finished panel a rough surface if they were allowed to remain.Type: GrantFiled: May 17, 1999Date of Patent: July 9, 2002Assignee: United States Gypsum CompanyInventor: David Paul Miller
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Patent number: 6409885Abstract: A pulp forming machine includes a forming head including a platen and plurality of mould carriers. The mould carriers are connected to the platen by mould carrier support means which allow the mould carrier and the platen to transmit forces perpendicular to the general plane of the platen but allow movement and expansion of each mould carrier in the general plane of the platen. Mould carrier to mould carrier locating means locate the mould carriers of opposing platens during the forming process to align moulds carried on the mould carriers with cooperating moulds of the cooperating platen.Type: GrantFiled: June 15, 2000Date of Patent: June 25, 2002Assignee: Fisher & Paykel LimitedInventors: Benno Frank Smit, Brent Richard Mooney, Christopher Arthur Good, Andre Brian Aish
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Patent number: 6398998Abstract: A method for producing shaped bodies of particulate material by introducing an easily flowable slurry of water and particulate material into a mold with perforated walls and by applying a sufficiently high pressure to the slurry in the mold so as to express a sufficient proportion of the liquid to allow physical contact and interengagement between the particles. The method may be carried out continuously in an extrusion process including introducing the slurry under high pressure into a extruder and conveying the slurry through a shaping section of the extruder to a draining and consolidation section of the extruder with drain holes and slits whereby a non-flowable, consolidated, shaped body leaves the extruder through an exit section.Type: GrantFiled: January 7, 1997Date of Patent: June 4, 2002Assignee: 3H Inventors ApSInventors: Herbert Krenchel, Helge Fredslund-Hansen, Henrik Stang
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Patent number: 6387318Abstract: A dry pressing and slip casting process is provided for the manufacture of glass-ceramic components of the type used in sensors. Both process on starts with a powder composition of SiO2 (42-59 wt. %), Al2O3 (17-35 wt. %), MgO (2-25 wt. %) and also BaO (0-20 wt. %), TiO2 (0-12 wt. %), ZnO (0-10 wt. %), CaO (0-10 wt. %), B2O3 (0-5 wt %), P2O5 (0-5 wt. %), ZrO2 (0-5 wt. %), alkali oxides such as K2O, Na2O (0-3 wt. %) and other small amounts (0-1 wt. %) of additives such as Fe2O3, As2O3. Fe2O3, V2O5, As2O3. Some of the ingredients (e.g. Mg, Ba, Ca) can also be present in the form of fluoride, e.g., MgF2, BaF2, CaF2, to up to 10 wt. %. Additional ceramic additives up to 30 wt. %, which are as second phase (e.g., Al2O3, Y2O3 doped ZrO2, SiO2, mullite, zircon, carbides, nitrides, and a combination of the above), are not part of the glass composition, but are introduced to enhance both the mechanical strength and toughness and to further modify the coefficient of thermal expansion.Type: GrantFiled: August 10, 1999Date of Patent: May 14, 2002Assignee: AlliedSignal, Inc.Inventors: Liang A. Xue, Anthony J. Bernot, Grenville Hughes, Laura Lindberg
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Patent number: 6361725Abstract: A process for making an artificial mineral or ceramic panels that can be used in gas fireplaces. The process uses a screen mold having simulated pattern elements to impart a realistic exterior surface to the article. A slurry of mineral fibers is injected under pressure into the mold forcing excess water therethrough leaving the fibers impinged within the mold. The article thus formed is dried in an oven and can be processed for additional decorative coatings.Type: GrantFiled: August 30, 1999Date of Patent: March 26, 2002Inventor: Wayne Sinsley
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Patent number: 6361726Abstract: A method and apparatus for making an inner packaging container, in which fiber components of a pulp slurry, which is prepared by dissolving or dispersing pulp, carbon fibers, and sparsely acetificated PVA fibers in water together with sizing agents and additives, are deposited to a desired thickness over a mold surface of a lower mold perforated with a number of pores and defined with a suction chamber, under the condition in which the lower mold is immersed in the pulp slurry, using a reduction of pressure occurring in the suction chamber, and molded into a desired shape by the lower mold along with an upper mold engaging with the lower mold, thereby forming a conductive packaging container having an integral structure.Type: GrantFiled: October 15, 1999Date of Patent: March 26, 2002Inventor: Soon-Jai Kim
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Patent number: 6361724Abstract: A process for producing a thermoplastic resin pellet, which comprises melt-kneading a thermoplastic resin to obtain a thermoplastic resin pellet, wherein the thermoplastic resin comprising: (A) at least one thermoplastic resin selected from the group consisting of polyphenylene ether-based resins, polyacetal-based resins, polyamide-based resins, polystyrene-based resins, acrylic resins, polyester-based resins, polycarbonates, polyphenylene sulfides, polyetherimides, polyethersulfones, polysulfones, polyether (ether) ketones; and (B) a carbon dioxide gas contained in thermoplastic resin (A) in an amount of from 0.3 to 20.0 parts by weight per 100 parts by weight of thermoplastic resin (A).Type: GrantFiled: October 25, 2000Date of Patent: March 26, 2002Assignee: Asahi Kasei Kabushiki KaishaInventors: Mutsumi Maeda, Hiroshi Yamaki, Hiroaki Ishikawa
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Patent number: 6325958Abstract: Cores for manufacture of molded products are fabricated from ceramic microspheres in combination with 5-20% polymer binder in water solution, the binder comprising poly(2-ethyl-2-oxazoline) and polyvinylpyrrolidone.Type: GrantFiled: May 9, 2000Date of Patent: December 4, 2001Assignee: Advanced Ceramics Research, Inc.Inventors: John Lang Lombardi, Gregory John Artz
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Patent number: 6309570Abstract: A system for making extruded cement-based articles. The process can include forming a cement-based feed mixture including water, aggregate and binder and directing the feed mixture to a vacuum zone, wherein sufficient vacuum is maintained in the vacuum zone to remove entrained air and, preferably, excess water, from the feed mixture. The feed mixture is held in the vacuum zone at a negative pressure for a time sufficient to form a vacuum-treated or densified mixture. The vacuum-treated or densified mixture is passed through an extruder at an elevated pressure to provide an extruded cement-based article.Type: GrantFiled: January 30, 1998Date of Patent: October 30, 2001Assignee: American Equipment SystemsInventor: Terence J. Fellabaum
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Patent number: 6296474Abstract: A log-burner apparatus is for simulating a burning log or piece of wood wherein at least a portion of the burner aperture of the burner is not defined by and does not extend through the artificial log material. As such, any adverse effect of the artificial log material on the efficiency of the burner is reduced. Additionally, the burner apparatus provides for durability of the burner while still providing a realistic simulation of flame coming from a log. In one embodiment, a gas burner apparatus including a gas burner structure with an outer surface including a portion with at least one burner aperture therein. The apparatus further includes an artificial log having an outer surface, and the artificial log is disposed at least partially around the gas burner structure. At least a portion of the outer surface of the burner structure including the burner aperture is exposed adjacent the outer surface of the artificial log. In another aspect, a method of making a gas burner apparatus.Type: GrantFiled: January 13, 2000Date of Patent: October 2, 2001Assignee: Hon Technology Inc.Inventors: Gary Lee Butler, David Charles Lyons, Robb Edward Bennett
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Publication number: 20010022048Abstract: A biodegradable tray for raising seedlings is obtained by obtaining a pulp mold from pulp slurry by suction molding and hot pressing after the molding. Thus, there is provided a biodegradable tray for raising seedlings composed of a pulp mold that has superior mechanical strength and dimensional accuracy during use and can easily be degraded after raising seedlings.Type: ApplicationFiled: February 22, 2001Publication date: September 20, 2001Inventors: Osamu Hasegawa, Yojiro Ohno
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Patent number: 6277313Abstract: A method of fabricating a ceramic structure as well as a pre-ceramic preimpregnated composite material incorporating a continuous woven fiber and a discontinuous fiber pre-ceramic matrix for subsequent curing and component construction. The method includes preparation of a mixture of discontinuous fibers, fillers, and a pre-ceramic precursor resin where the precursor resin is present in a quantity sufficient to substantially saturate subsequently adjacent woven fiber lengths, and thereafter introducing the mixture to a situs between an upper length of woven fiber and a lower length of woven fiber in alignment with each other while effectuating linear movement of these woven fiber lengths and moving the lengths toward each other for compression and retention in a sandwich configuration to thereby fabricate a pre-ceramic preimpregnated composite material. The material is cut to size in accord with the configuration of a part to be manufactured, formed into a green-state structure, and cured.Type: GrantFiled: August 23, 1999Date of Patent: August 21, 2001Assignee: Northrop Grumman CorporationInventors: Thomas Edward Strasser, William James Marsh, Robert Allan Schwindler