Treatment Of Material By Vibrating, Jarring, Or Agitating During Shaping Patents (Class 264/69)
  • Patent number: 5217302
    Abstract: Method and apparatus for the electromagnetic dynamic plasticating of polymer materials includes a magnetic moving body which is supported both axially and radially by a magnetic levitation gap. The magnetic body is rotated in non-steady state vibration within an electromagnetic winding and cooperates with a stationary body to form a processing space for the polymer material.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: June 8, 1993
    Assignee: South China University of Technology
    Inventor: Qu Jin-ping
  • Patent number: 5211750
    Abstract: An abrasion resistant synthetic aggregate made from an intimately intermixed combination of lime, fly ash and sulfate/sulfite sludge (e.g. FGD sludge), mixed to the point where the mixture is nearly optimum density and compressible or non-compressible and plastic. This mixture is placed in a landfill. After a relatively brief cure period, the landfill is ripped and the material is crushed and graded. The aggregate, which in some instances may qualify as a light weight aggregate, has a Los Angeles Abrasion Resistance of less than 60%, and may in some cases be less than 50% (medium particles passing) according to that test.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: May 18, 1993
    Assignee: Conversion Systems, Inc.
    Inventors: Charles L. Smith, John J. Juzwiak
  • Patent number: 5209968
    Abstract: A low cost, lightweight, high strength, long lasting, crack resistant, monolithically formed composite structural material and the method of making the same in which the composite consists of a core constructed from lightweight, granulated scrap or waste plastic bonded together with a cementitious slurry binder. The core is covered on one or more of its sides with a high strength outer layer constructed of layers of non-woven fabric material impregnated with the same cementitous slurry binder with the fibers in the layers of non-woven fabric material forming a three-dimensional reinforcement matrix for the cementitous slurry. The composite of the core and covering is co-formed and cured monolithically with the cementitious slurry being continuous throughout the fibers of the layers of non-woven fabric and the core with the lightweight scrap or waste plastic serving as an aggregate for the core. The composite structural material can be molded or formed in various shapes and configurations for various purposes.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: May 11, 1993
    Assignee: Diversitech Corporation
    Inventor: Jeff S. Sweeney
  • Patent number: 5209879
    Abstract: The method and apparatus of this invention transforms naturally occurring or synthetic waxes into a state characterized by the fact that when the waxes solidify, they do so in forms different from those forms into which they would solidify except for the transformation. The transformation is achieved by subjecting the waxes to force. As examples of apparatuses which can supply the force to effect the transformation, a piston apparatus and an ultrasonic apparatus are disclosed. The triglyceride waxes are one type of wax which may be transformed by the method and apparatus of this invention. Transformed triglyceride waxes form superior shells when the waxes are used in an encapsulation process.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: May 11, 1993
    Inventor: Bruce K. Redding, Jr.
  • Patent number: 5204055
    Abstract: A process for making a component by depositing a first layer of a fluent porous material, such as a powder, in a confined region and then depositing a binder material to selected regions of the layer of powder material to produce a layer of bonded powder material at the selected regions. Such steps are repeated a selected number of times to produce successive layers of selected regions of bonded powder material so as to form the desired component. The unbonded powder material is then removed. In some cases the component may be further processed as, for example, by heating it to further strengthen the bonding thereof.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: April 20, 1993
    Assignee: Massachusetts Institute of Technology
    Inventors: Emanuel M. Sachs, John S. Haggerty, Michael J. Cima, Paul A. Williams
  • Patent number: 5202066
    Abstract: Disclosed is a plasticization method in which a molding material is supplied to a cylinder having a built-in screw to plasticize the molding material, and further, at least one of the cylinder and the screw is resonated to carry out the plasticization of the molding material. Also disclosed is a plasticization method in which the cylinder is vibrated by progressive waves to plasticize the molding material, and an apparatus able to carry out these plasticization methods.
    Type: Grant
    Filed: January 15, 1992
    Date of Patent: April 13, 1993
    Assignees: Idemitsu Kosan Co., Ltd., Seidensha Electronics Co., Ltd.
    Inventors: Toshihiro Furusawa, Atsushi Satoh, Takashi Nakajima, Noriaki Matsugishi
  • Patent number: 5192555
    Abstract: Apparatus and method for molding plastic articles including oscillating the molten plastic in the mold cavity. The method and apparatus is particularly suitable for use with a plurality of mold cavities supplied from a single feeding means or extruder. The disclosure teaches alternately feeding molten plastic to the mold cavity from at least one shooting pot while the flow of molten plastic to the mold cavity from the feeding means is discontinued.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: March 9, 1993
    Assignee: Husky Injection Molding Systems Ltd.
    Inventor: Robin Arnott
  • Patent number: 5183332
    Abstract: The present invention aims to evenly and surely knead a concrete material comprising less water amount. Concrete material layer entered into a kneading tank is cut in an up-and-down direction and divided into a plurality of layer sections arrayed side by side along a right-and-left direction, and one of the divided layer sections is piled up another one of the divided layer sections in the up-and-down direction, then piled up concrete layer sections are compacted, in other words are pressed in the up-and-down direction and extended in a horizontal direction, and further these steps are repeated.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: February 2, 1993
    Inventor: Kenji Maeda
  • Patent number: 5173233
    Abstract: A process for forming a poured slab, preferably of concrete, which has different colored portions. The process includes (a) pouring a wet concrete mixture of cement particles, sand particles and gravel particles into a horizontal mold cavity having a stepped mold bottom surface, (b) curing the mixture to produce a slab with a roughly horizontal rear surface and a stepped front surface corresponding to the mould bottom surface, and (c) mechanically removing the cured mixture between a cut plane generally parallel the rear surface through the slab and the front surface. The resultant slab has different portions with different coloration and appearance due to the cut plane passing through portions of the concrete having different proportions of cement, sand and gravel particles.
    Type: Grant
    Filed: October 16, 1991
    Date of Patent: December 22, 1992
    Inventor: Z. Grant Kafarowski
  • Patent number: 5160466
    Abstract: A molding process, includingsupplying molten, moldable material to a mold cavity;subjecting at least a part of the supplied molten material to a shear force;causing the material to solidify while maintaining the shear force; anddemolding the molded material.
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: November 3, 1992
    Assignee: National Research Development Corporation
    Inventors: Peter S. Allan, Michael J. Bevis
  • Patent number: 5143663
    Abstract: An improved stereolithographic apparatus and method is described. In one embodiment, the improvement includes immersing at least a portion of a part in a volume of a liquid solvent in a vapor degreaser while subjecting the portion to ultrasonic agitation to substantially remove excess resin. Several examples of solvents are provided, including ethanol, and Freon TMS. In a second embodiment, the improvement includes building the part on a layer of liquid resin supported by a volume of a dense, immiscible, and UV transparent intermediate liquid, and integratably immersing at least a portion of the built part in the intermediate liquid, and then either subjecting the immersed portion to ultrasonic agitation to substantially remove excess resin, or subjecting the immersed portion to UV light. Several examples of intermediate liquids are provided, including perfluorinated fluids, such as Fluorinert FC-40, and water-based salt solutions, such as solutions of magnesium sulfate or sodium chloride in water.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: September 1, 1992
    Assignee: 3D Systems, Inc.
    Inventors: Richard N. Leyden, Thomas A. Almouist, Mark A. Lewis, Hop D. Nguyen
  • Patent number: 5139602
    Abstract: There is provided an apparatus for producing a paving block comprising a block substrate and a solid top layer selected from a tile-like layer and a cured cement mortar layer firmly bonded onto the upper surface of the block substrate. The apparatus comprises a mortar applicator (21) consisting essentially of a mortar container and a masking bottom board (23) having an opening (24) to be located on the back of a top layer (1-2) or the upper surface of a block substrate (1-1) during application of cement mortar thereon, a clamping plate (25) to be located on the top layer (1-2) placed on the block substrate (1-1) during bonding them, and a scraping frame (26) for scraping excess mortar remaining on the side surfaces of the bonded block. When the apparatus is used to produce a novel paving block comprising a block substrate and a solid top layer having a plane dimension smaller than the substrate, squeeze-out deposits (6) of the cement mortar (7) are further formed around the bonded top layer (1-2).
    Type: Grant
    Filed: February 25, 1991
    Date of Patent: August 18, 1992
    Assignees: Chichibu Cement Co., Ltd., Inax Corporation, ILB Co., Ltd.
    Inventors: Shigeo Suda, Osamu Kodama, Takumi Tanikawa, Hideyuki Munakata
  • Patent number: 5102586
    Abstract: An agglomerating process and an apparatus therefor for preparation of sinter mix having the basis of kneading with vibration to make raw feed in capillary state and then agglomerating the kneaded material with tumbling vibration. By using the particular process, apparatus and various kinds of raw feeds, sintering characteristics of the product shows superiority in size distribution, permeability, strength, and activities, resulting cost, power and material consumptions of the process are remarkably improved.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: April 7, 1992
    Assignee: Kawasaki Steel Corporation
    Inventors: Norifumi Fuji, Shunji Iyama, Shoji Nitta, Kazuo Hosomi, Takumi Fukagawa, Hiroaki Ishikawa, Yukio Konishi
  • Patent number: 5093050
    Abstract: A novel method for generating orientation of short fibers in the matrix of a composite material allows for production of complex high strength components. With state of the art technologies short fibers can be oriented only by elongational flows and these are generally applicable only to extrusion products. The invention is based on the fundamental discovery that short fibers can be oriented by relative movement against a finer three-dimensional isotropic network. Gel networks are of molecular level and satisfy this scaling requirement even for whiskers. The process involves mixing-in the fibers with a gel, pouring (injecting) the mixture into a mold and then orienting the fibers by moving them relative to the gel network. The movement can be driven by sound waves. When orientation is accomplished, the gel is solidified forming the matrix of the composite.
    Type: Grant
    Filed: November 17, 1989
    Date of Patent: March 3, 1992
    Assignee: Laboratorium fur experimentelle Chirurgie
    Inventor: Slobodan Tepic
  • Patent number: 5079088
    Abstract: A waterproof sheet used to waterproof structures has a single layer of non-degradable, water impermeable polymeric membrane that has layers of particles of non-hydrated sodium montmorillonite (sodium bentonite) adhering to the membrane in a uniform layered thickness. The layers of particles of sodium montmorillonite spaced from the membrane adhere to each other, with a coating material (adhesive) that is designed to provide the necessary performance for waterproofing. A water soluble dye is provided in the layer of particles so if a tear occurs in the impermeable membrane and water contacts the particles, the dye will stain the membrane and mark the location of the tear.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: January 7, 1992
    Assignee: Paramount Technical Products, Inc.
    Inventors: Bryan M. McGroarty, Patrick J. McGroarty
  • Patent number: 5069840
    Abstract: Apparatus and method for molding plastic articles including oscillating the molten plastic in the mold cavity. The method and apparatus is particularly suitable for use with a plurality of mold cavities supplied from a single feeding means or extruder. The disclosure teaches alternately feeding molten plastic to the mold cavity from shooting pots while the flow of molten plastic to the mold cavity from the feeding means is discontinued.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: December 3, 1991
    Assignee: Husky Injection Molding Systems Ltd.
    Inventor: Robin Arnott
  • Patent number: 5066440
    Abstract: A process for preparing a building block is described. In the first step of the process, an integral, substantially serpentine insert with a density of from about 1 to about 2 pounds per cubic foot is disposed within a mold. Thereafter, a cementitious material is placed in the mold around the insert and then press until the material within the mold has a density of from 80 to 150 pounds per cubic foot. The block thus formed is then removed from the mold and heated at a temperature of from about 75 to about 250 degrees Fahrenheit.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: November 19, 1991
    Assignee: Thermalock Products, Inc.
    Inventors: Francis A. Kennedy, John P. Neff, Kenneth J. Blake
  • Patent number: 5059368
    Abstract: A moulding process including:supplying molten, mouldable material to a mould cavity;subjecting at least a part of the supplied molten material to a shear force;causing the material to solidify while maintaining the shear force; anddemoulding the moulded material.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: October 22, 1991
    Assignee: National Research Development Corporation
    Inventors: Peter S. Allan, Michael J. Bevis
  • Patent number: 5047463
    Abstract: Cast ceiling tile requires a particular rheology of its wet formulation for the dried tile to have a desired aesthetic appearance. The use of a latex binder rather than starch for cast ceiling tiles imparts the necessary rheological properties to the wet ceiling tile formulation. The tile is prepared by blending mineral wool with a premixture of water, latex, and filler, said premixture having a sharp yield point when measured with a recording Brookfield Viscometer. The latex is an alkali-swellable latex comprising (i) a C.sub.3 -C.sub.8 .alpha.,.beta.
    Type: Grant
    Filed: March 2, 1989
    Date of Patent: September 10, 1991
    Assignee: The Dow Chemical Company
    Inventors: William H. Keskey, Kenneth R. Meath
  • Patent number: 5037600
    Abstract: Iron pipe and other hollow articles are lined with a cementitious mortar containing a quantity of polymer particles and the pipe is rotated about its axis so as to stratify the mortar and develop a polymer rich inner surface that is subsequently cured, dried and heated to the polymer fusion temperature and then coated with a continuous layer of pure polymer.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: August 6, 1991
    Assignee: AMSTED Industries Incorporated
    Inventor: Thurman H. Upchurch
  • Patent number: 5028368
    Abstract: A method for making concrete pipe. Vinyl liners are held by an expandable liner carrying device. The carrying device is expanded so as to hold the liner in engagement with the outer surface, forming a liner/carrier assembly. Concrete reinforcing bars are placed around the liner/carrier assembly. The liner/carrier assembly and reinforcing bars are surrounded by a dry-cast concrete form. Then, the form is placed on a forming module, and the module is actuated into engagement with the inside surface of the core forcing the liner/carrier assembly to assume a predetermined, usually cylindrical, shape. The form is filled and immediately taken off of the module. The form is immediately stripped, but the core, held immobile by the dry cast concrete, which sets quickly, continues to hold the liner in engagement with the concrete until a complete bond is established. Finally, the core is retracted from engagement with the liner and removed from the finished lined pipe.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: July 2, 1991
    Assignee: International Pipe Machinery Corporation
    Inventor: Thomas D. Grau
  • Patent number: 5024796
    Abstract: A wave-dissipating caission includes a box-shaped skeleton made up of ridge members, wherein wing members are provided. Each wing member is in the form of a trapezoid with one end thereof separated from other wing members, and an opposite end joined to other wing members. The method for producing the caisson includes the steps of providing a mold for a bottom plate portion of the caission, depositing reinforced concrete into the mold for forming the bottom plate portion, and installing a plurality of steel rods onto the bottom plate portion. The method for producing the caission further includes the step of erecting wing frames, right and left side frames, front and back frames, and an upper frame around the plurality of steel rods. Concrete is then deposited into the frames, thereby forming the caission within the frames. Then the frames are removed from the formed caission.
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: June 18, 1991
    Inventor: Nobuhiko Iwasa
  • Patent number: 5021205
    Abstract: A concrete manufacturing process includes pouring a fluidized cement containing a short fiber as an admixture into a concrete manufacturing mold; applying a predetermined level or levels of pressure to the entire fluidized cement poured into the mold, while a gas is introduced into the cement; and hardening the cement as the gas introduced thereto forms bubbles which burst and generate vibration when they are vented through a venting section provided for the mold. When the cement is hardened to some degree, the hardening may be continued in a temperature-controlled liquid bath or followed by curing with steam.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: June 4, 1991
    Assignees: Yoshio Niioka, Marvin Gottlieb
    Inventor: Yoshio Niioka
  • Patent number: 5021202
    Abstract: Rammed building walls having an earth core and integral cement jackets are formed by placing a rectangular earth hopper within a rectangular wall moulding cavity that is defined by formwork members which are aligned with an underlying foundation. The hopper is filled with earth while outside of the moulding cavity and has a trapdoor as its bottom. The moulding cavity has a substantially greater width than the width of the hopper so that jacket cavities are formed on either side of the hopper. A pair of tiltable cement hoppers, filled with concrete or a sand and cement mix, are mounted on the earth hopper and are tiltably unloaded into the jacket cavities. The trapdoor is then released so that the earth slides downwardly and laterally, and the hoppers are lifted as a unit out of the moulding cavity while the earth fills a core cavity between the mix-filled jacket cavities. Both the earth and mix are then rammed simultaneously.
    Type: Grant
    Filed: July 27, 1989
    Date of Patent: June 4, 1991
    Inventor: Jan Novotny
  • Patent number: 5017548
    Abstract: A method for producing high-temperature superconducting ceramic material through mechanical orientation including mixing starting materials in powdered form in proportions effective to produce a high-temperature superconducting oxide ceramic having anisotropic crystal grains and shaping the mixture. Next, the shaped mixture is calcined at a temperature ranging from to C. and fired at a temperature higher than 1, C. in an oxygen atmosphere for a time effective to produce a superconducting oxide ceramic having crystal grains. According to the invention, the superconductive oxide ceramic is then pulverized into particles having either a plate-like form or a needle-like form based on the anisotropic form of the crystal grains. Particles of a selected size are placed into a vessel and vibrated with an acoustic vibrator means under conditions effective to cause the pulverized particles to turn toward a common preferred orientation to provide oriented particles.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: May 21, 1991
    Assignee: Kyushu University
    Inventors: Kazuyoshi Hirakawa, Hisao Kuriyaki, Xu-guang Zheng
  • Patent number: 5011640
    Abstract: One or more powders are placed in a leaktight vessel (12) having a substantially vertical axis and comprising a bottom blade rotating about an axis parallel to the axis of said vessel, and a spheronizing tool (28) having a substantially discoidal rotating form; said powders are mutually mixed by means of the rotation of said bottom blade, and a binder solution is added thereto. The composition of mixed powders thus added to is spheronized by immersing said spheronizing tool (28) in said composition and causing it to rotate simultaneously with said blade (18).
    Type: Grant
    Filed: March 1, 1990
    Date of Patent: April 30, 1991
    Assignee: Zanchetta & C. S.r.l.
    Inventor: Aldo Zanchetta
  • Patent number: 4995932
    Abstract: The fracture-free paving block (1) comprises a cement block substrate (1-1) and a top solid layer (1-2), and is characterized in that the top layer is selected from a cured cement mortar layer and a tile-like layer firmly bonded to the substrate with cement mortar; the top layer is bonded to the block substrate with lateral margins (2) of 1 to 8 mm wide in horizontal distance (1.sub.5) from the peripheral edges of the substrate: and the vertical distance (1.sub.6) from the surface of the top layer to the peripheral edge of the substrate is 5 to 50 mm. The method for producing the paving block (1) having a tile-like top layer comprises applying adhesive cement mortar between the back of the top layer (1-2) and the upper surface of the substrate (1-1); placing the top layer on the substrate with the above-mentioned margins (2) of the substrate surface: and applying vibration and/or pressurization between the top layer and the substrate.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: February 26, 1991
    Assignees: Chichibu Cement Co., Ltd., Inax Corporation, ILB Co., Ltd.
    Inventors: Kinoto Yoshida, Morizumi Fujii, Tokihiro Tsuda, Shigeo Suda, Osamu Kodama, Kazuro Kuroe, Takumi Tanikawa, Michihiko Nishimura, Hideyuki Munakata
  • Patent number: 4994220
    Abstract: A process and apparatus for injection molding of injection molded parts of plasticized material, in particular plasticized liquid crystal polymers, in which the plasticized material is injected into the mold cavity of a closed injection mold having at least two spaced apart infeed gates, separate plastification and injection devices being associated with each of the gates. The plasticized material may be further injected into the mold cavity to compensate for any shrinkage during cooling of the molded material. Injection is carried out by at least one of the devices which causes the material to flow into the cavity via one of the gates associated therewith for filling the cavity and causing the material to partially flow from the cavity via the other of the gates in the direction of the other of the devices associated therewith.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: February 19, 1991
    Assignee: Kloeckner Ferromatik des GmbH
    Inventors: Lothar Gutjahr, Wolfgang Nesch
  • Patent number: 4990292
    Abstract: A process for producing improved gypsum models and molds of high duplication accuracy is provided. In the process, bundles of carbon fibers of specified length and amount having a sizing agent deposited thereon are treated to remove the sizing agent from the carbon fibers which are then separated into single fibers in water. A major part of hemihydrate gypsum (CaSO.sub.4.1/2H.sub.2 O) powder is then added to the carbon fibers dispersed in water to obtain a gypsum slurry having the carbon fibers uniformly dispersed therein. The slurry is then cast to obtain the models or molds.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: February 5, 1991
    Assignee: Noritake Co., Limited
    Inventors: Yoshiaki Hattori, Makoto Ishihara
  • Patent number: 4981626
    Abstract: After a mortar layer is formed on the surface layer of placed concrete, an ultrasonic vibrator is caused to vibrate while being pressed against the mortar layer surface, and a thin surface layer is scraped off, obtaining a dense water-shielding layer. Mortar with a low water-cement ratio is spread onto the surface of the water-shielding layer, and adhesion between the mortar and the water-shielding layer is strengthened by using the ultrasonic vibrator. The pressing force of the ultrasonic vibrator is then increased to make the mortar and the water-shielding layer densely integrated together, thereby forming a hard concrete surface excelling in abrasion resistance.
    Type: Grant
    Filed: April 5, 1990
    Date of Patent: January 1, 1991
    Assignee: Takenaka Corporation
    Inventor: Iwao Uchizaki
  • Patent number: 4952354
    Abstract: A method for degating an injection molded article comprising the steps of filling a mold cavity with a molten resin and cooling the mold to effect gate seal. A gate cut shaft member is oscillated after gate seal is completed to soften the hardened resin in the gate. The gate cut shaft member is then displaced with respect to the mold cavity when the resin is softened to effect degating. A second method comprises the steps of cutting the gate in the molded article by sliding the gate cut shaft member during the dwell process with respect to the mold cavity after filling the mold with molten resin and before gate seal is effected. While said gate cut shaft member is subject to minute oscillation or a slow reciprocating motion, the shaft surface is abutted against the degated surface to obtain a good cut surface on the molded article.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: August 28, 1990
    Assignees: Nissui Kako Co., Ltd, Nachi-Fujikoshi Corporation
    Inventors: Hidetoshi Yokoi, Mikiya Niwa, Yasuo Nomura, Takeshi Takahasi
  • Patent number: 4925161
    Abstract: A moulding process including:supplying molten, mouldable material to a mould cavity;subjecting at least a part of the supplied molten material to a shear force;causing the material to solidify while maintaining the shear force; anddemoulding the moulded material.
    Type: Grant
    Filed: March 8, 1989
    Date of Patent: May 15, 1990
    Inventors: Peter S. Allan, Michael J. Bevis
  • Patent number: 4917741
    Abstract: The process for forming, or rendering endless or repairing a conveyor belt made of rubber and equipped with stress bearing inserts comprises providing a conveyor belt section with rubber material and preparing it for vulcanization, bringing it between heatable press platens and vulcanizing it using heat and pressure. The rubber has Newtonian flow properties and undergoes a hot pressing. The conveyor belt section is vibrated during vulcanization over a vibrational time period which is smaller than the vulcanization time.
    Type: Grant
    Filed: November 29, 1988
    Date of Patent: April 17, 1990
    Assignee: C. S. Fudickar KG
    Inventors: Peter Thies, Harald Fudickar
  • Patent number: 4856980
    Abstract: An apparatus for making parts having complex geometric shapes by injection molding apparatus. The apparatus avoids the formation of a parting line in the molded object. The apparatus includes an injector plate, an ejector plate and a floating plate. The injector plate has at least one mold cavity for making a part and a passageway to allow molten plastic to enter the mold cavity. The ejector plate has at least one mold cavity corresponding to the mold cavity in the injector plate. The floating plate has at least one projection. The plates are adapted to fit together when the mold is closed so that the floating plate is between the injector and ejector plates and the projection fits centrally between the cavities of the injector and ejector plates. A mechanism moves the injector plate, ejector plate and floating plate with respect to one another.
    Type: Grant
    Filed: September 18, 1987
    Date of Patent: August 15, 1989
    Assignee: Schmid Laboratories, Inc.
    Inventor: Joseph N. Laurita
  • Patent number: 4853053
    Abstract: Method of welding two hollow ceramic half-components containing an organic binder whereby each half-component is first loaded into a die, the jointing planes of the two half-components are then brought into contact by bringing together the two dies, working pressure is thereafter applied to one of the half-components in a direction perpendicular to the jointing planes and vibration is simultaneously applied to the other half-component in a direction parallel to the jointing planes to effect the welding of the two half-components by interpenetration. The two dies are then separated and the joined monobloc component is removed and sintered without altering the component's monolithic quality.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: August 1, 1989
    Assignee: Societe Anonyme Dite: Ceraver
    Inventors: Louis Minjolle, Michel Drouet, Jean-Louis Fatta-Barou, Michel Callegari, Jacques Noel
  • Patent number: 4846884
    Abstract: A process for producing cold-bonded or non-fired iron ore which introduced as a charge into a blast furnace. The iron ore, which contains 10 to 70% of particles having a diameter ranging from 1 to 10 mm, is molded into a block, preferably by a pressure-molding method, a shock-molding method or a packing-molding method with vibrations. The block is then cured or hardened. This hardened block is crushed to have a predetermined shape. An additive such as CaO, Al.sub.2 O.sub.3, or MgO may be added to the iron ore to adjust the basicity as a whole to 0.8 to 2.0. Moreover, the molding step is conducted so that the product may have a void volume equal to or less than 25%.
    Type: Grant
    Filed: September 5, 1986
    Date of Patent: July 11, 1989
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Tatsuhiko Shigematsu, Minoru Ichidate, Chitose Shiotani, Yohzi Tozawa
  • Patent number: 4840755
    Abstract: A method of and an apparatus for producing compacted chopped strands having a high density, wherein flattened wetted chopped strands are prepared and subjected in the wetted state to a rolling action to change the flattened form into rounded rod-like form while being compacted. The chopped strands are conveyed horizontally along a vibrating carrier plate (44, 151, 151') so that the rolling action is imparted to the chopped strands during the convey. The chopped strands moving among the carrier plate (151, 151') is dried by heated air applied from the lower side of the chopped strands.
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: June 20, 1989
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Kogi Nakazawa, Toshihito Fujita
  • Patent number: 4839255
    Abstract: A toner for producing electrostatic latent images is produced by mixing base particles (A) with specific modifier particles (B) to attach the modifier particles (B) to the surfaces of the base particles (A), and passing the resultant mixture through a specific impact zone thereby to fix the modifier particles (B) to the base particles (A) under the action of a mechanical impact force.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: June 13, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshihiko Hyosu, Norio Hikake, Katsuhiko Tanaka
  • Patent number: 4836967
    Abstract: A process for forming a joint for connecting a plurality of bars in a metal casing includes the steps of pouring a granulated solid into the metal casing and prestressing the solid by driving in a mandrel through the filling aperture of the casing. Thereafter, an unsinkable or a low-shrinkage hardening fluid is injected into the metal casing and permitted to harden.
    Type: Grant
    Filed: January 13, 1987
    Date of Patent: June 6, 1989
    Assignee: Manfred Beer
    Inventors: Erich Frantl, Peter Hofstatter
  • Patent number: 4784811
    Abstract: A method of making optrodes is provided by which a pressure-sensitive volume is incorporated in the optrode by bubble transfer and/or gas entrapment in the manufacturing step sequence.
    Type: Grant
    Filed: March 3, 1986
    Date of Patent: November 15, 1988
    Assignee: The Regents of the University of California
    Inventor: Tomas B. Hirschfeld
  • Patent number: 4769191
    Abstract: A reinforced concrete wall, such as a road barrier or barricade, has a monolithic surface ornamentation thereon constituted by pigmented cements and grooves simulating mortar joints. In the horizontally oriented top portions of the wall where the pigmented cements are substantially thicker than the layers of pigmented cements monolithically joined to the vertical oriented portions of the wall so that these portions, which are subject to chipping and the like during handling and use will retain their aesthetically pleasing appearance. In the molding process, ribs on the mold surface which will form the grooves have a retardant applied thereto so that the cement forming the mortar joint will set at a slower rate than the rest of the body of the concrete wall and when removed from the mold can be brushed. When the wall is in the form of a road barrier, the ends are provided with a conical projection and a conical recess, respectively, to provide coupling between adjacent wall units.
    Type: Grant
    Filed: September 23, 1986
    Date of Patent: September 6, 1988
    Inventor: Silvio Diana
  • Patent number: 4759892
    Abstract: A body having a large number of protrusions is aligned with a honeycomb surface having a greater number of openings, selected openings being engaged by the protrusions when the body is aligned, by positioning the body against the honeycomb surface and vibrating it until the protrusions engage. The method is of particular use in aligning flexible masks to end faces of honeycomb structures in the fabrication of solid particulate filter bodies. Particular mask and honeycomb structure geometries are suggested for automation of the process.
    Type: Grant
    Filed: July 15, 1981
    Date of Patent: July 26, 1988
    Assignee: Corning Glass Works
    Inventor: Roy T. Bonzo
  • Patent number: 4744841
    Abstract: A method of repairing windshields that have been chipped or cracked comprising the steps of removing damaged glass from a break in the surface of the glass, fixing a pressure applier over the break, impact vibrating the windshield and heating the reverse side of the windshield to increase the size of the opening being filled and to drive air from the opening, injecting a resin into the damaged area while vibrating and heating and, if necessary, removing any additional air by developing a suction over the damaged area. The apparatus of the invention includes a frame that is suction held in place, and that mounts the injection plunger and a vibrator to vibrate the glass as a resin is injected into openings in the glass.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: May 17, 1988
    Inventor: Thomas L. Thomas
  • Patent number: 4740338
    Abstract: Several advantages as to ease of cell fabrication, maximum cell size, fiber breakage, tubesheet tightness, resistance to tubesheet deformation in prolonged service, safety, etc., can be realized by using as the tubesheet in a hollow fiber type battery cell one which is elongated in shape, has a substantially smaller diameter than the fiber "bundle" depending from it and in which the fiber ends passing through it are closely packed.
    Type: Grant
    Filed: March 25, 1986
    Date of Patent: April 26, 1988
    Assignee: The Dow Chemical Company
    Inventors: Daniel O. Clark, Floris Y. Tsang, Paul A. Damrow
  • Patent number: 4710480
    Abstract: The invention relates to a ceramic molding which is manufactured from high-temperature resistant, fire-resistant or refractory fibers and fine-grain, fire-resistant or refractory materials and, in certain cases, from other customary additives. The ceramic molding is characterized by the fact that its porosity gradually and continuously increases along an axis of the molding from less than 20% to more than 70%. The areas with low porosity comprise the fine-grain, fire-resistant or refractory materials. The areas of high porosity comprise ceramic fiber, such as, fibers of Al.sub.2 O.sub.3, SiO.sub.2, ZrO.sub.2, C, SiC or mixtures thereof. The intermediate areas are constructed of mixtures of ceramic fiber and fire-resistant or refractory materials. The invention also relates to the use of such a ceramic molding method for the manufacture of compound moldings saturated or infiltrated with organic resins, pitch, tar, metals, metal alloys or glasses.
    Type: Grant
    Filed: December 3, 1985
    Date of Patent: December 1, 1987
    Assignee: Didier-Werke AG
    Inventors: Rudiger Buschmann, Rudolf Ganz, Gerd Willmann, Ludwig Wirth, Ingo Elstner, Peter Jeschke
  • Patent number: 4690791
    Abstract: In a process wherein parts are pressed into a predetermined shape by filling a die cavity with a powder material, compressing the powder under pressure to form a compressed part of said shape, an improvement to that process comprises subjecting a portion of the cavity to vibrations during the filling of the die cavity.
    Type: Grant
    Filed: October 2, 1985
    Date of Patent: September 1, 1987
    Assignee: GTE Products Corporation
    Inventor: Charles G. Edmiston
  • Patent number: 4645631
    Abstract: Extrusion of a mixture of vegetable bits with a binder, particularly wood chips with a weather-resistant binder, involves precompressing in a compression chamber of an extrusion press the mixture by a compression stroke transverse to the extrusion axis, the compression stroke being delivered by at least one precompression piston. Prior to the precompression elongated bits of the mixture are acted on by an orienting influence so that the elongated bits are deposited substantially parallel to the extrusion axis. The outer layers of the mixture are compressed with a reduced precompression ratio so that the bits oriented prior to precompression remain fixed in position during the subsequent extrusion stroke.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: February 24, 1987
    Assignee: Anton Heggenstaller
    Inventors: Anton Hegenstaller, Xaver Spies
  • Patent number: 4636341
    Abstract: Apparatus for making injection molded polymeric articles, comprising a vibratory pneumatic cooling assembly adapted to dissipate thermal energy from the polymeric articles after they are ejected from the mold cavities through use of an oscillating perforated vibratory grid adapted to maintain the articles in relative motion while at least partially supporting them on a substantially uniform cushion of air. A method for employing the apparatus of the invention to substantially reduce the cycle time required for injection molding polymeric articles is also provided.
    Type: Grant
    Filed: March 4, 1985
    Date of Patent: January 13, 1987
    Assignee: Co-Ex Pipe Company, Inc.
    Inventor: Jackie D. Murley
  • Patent number: 4629594
    Abstract: In an arrangement for and a method of producing shaped parts of a non-swellable mixture of fibers and heat-hardenable resin, a pressing mass divider is introduced into lower pressing tool during filling of the mixture.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: December 16, 1986
    Assignee: Werzalit-Werke J. F. Werz KG
    Inventor: Edmund Munk
  • Patent number: 4595626
    Abstract: The present invention relates to conformable tile products which may be formed from aggregate material and relatively low weight percentages of unsaturated polyester resin precursors. When cured, the tiles may be adhered to subfloors utilizing ordinary resilient flooring-type adhesives. Further, they will be conformable to subsurface irregularities, and will have high strength and impact resistance when installed as a flooring surface.
    Type: Grant
    Filed: January 28, 1985
    Date of Patent: June 17, 1986
    Assignee: Armstrong World Industries, Inc.
    Inventors: Mary A. Brubaker, Wendell A. Ehrhart, William Y. Whitmore