Treatment Of Material By Vibrating, Jarring, Or Agitating During Shaping Patents (Class 264/69)
  • Patent number: 5989371
    Abstract: A vacuum heat-insulating panel includes: a porous core material formed from a mixture containing plastic foam powder and a filler in the form of flakes or a porous core material formed from a mixture containing plastic foam powder and thermoplastic resin powder; and a packaging material for packaging the core material, the inside of the package material being kept in a vacuum, the core material holding its shape. Rigid polyurethane foam may be used as the plastic foam. Mica flakes, plastic films each coated with thin metal film, metal foil or the like may be used as the filler. Styrene resin may be used as the thermoplastic resin.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: November 23, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Yoshio Nishimoto
  • Patent number: 5951928
    Abstract: A charging barrel and screw as well as their associated components for carrying out the processes of plasticization, injection and pressure maintaining of the polymer are all disposed in the inner cavity of a metal moving body driven to rotate pulsatorily by an electromagnetic winding. At the time when the screw and the metal moving body are simultaneously rotating pulsatorily, the screw is at the same time making axial pulsative displaments, so that the processes of plasticization, injection and pressure maintaining are all carried out in a periodic oscillating state. This type of injection moulding method and apparatus have the advantages of small volume, light weight, low manufacturing cost, low energy consumption, low noises, wide adaptability to materials and excellent quality of the moulded products.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: September 14, 1999
    Assignee: South China University of Technology
    Inventor: Qu Jinping
  • Patent number: 5895616
    Abstract: A friction material matrix 2 consisting of a mixture of a fibrous base material, a binder, and various fillers is introduced into a molding die 3. Rod members 5 are inserted into the molding die 3 from above. The rod members 5 are vertically actuated while a stroke of the actuation of the rod members 5 is gradually reduced. The friction material matrix 2 is compressed until its volume becomes 50 to 60 vol. % of the initially introduced friction material matrix 2. Then, a bottom plate 4 is raised to compress the friction base matrix 2, so that the friction base matrix 2 is preformed.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: April 20, 1999
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventors: Takeo Yumoto, Nobuyuki Iwatate, Naozumi Kawanishi, Yuji Watanabe
  • Patent number: 5888645
    Abstract: A fiber-reinforced composite material and articles of manufacture formed thereof are formed by the method comprising: forming a compound material comprising a mixture of curable matrix-forming binder, heat resistant reinforcing fibers, and at least one particulate material, wherein the curable matrix-forming binder is 5 to 50% by volume of the compound material; curing the curable binder under simultaneous application of externally applied pressure and ultrasonic energy. Articles according to the invention are useful in a multitude of applications, particularly in applications where the article must retain its shape and properties when subjected to temperatures above the melting point of usual thermoplastic materials, e.g. above 1000.degree. C. The method provides dense, thermally stable, coherent composite materials having a desired high density. Forming and curing times are typically 10 times shorter than conventional methods, e.g. for brake pads in about 3-5 seconds.
    Type: Grant
    Filed: May 10, 1993
    Date of Patent: March 30, 1999
    Assignee: Obtec A/S
    Inventors: Torben Lindgaard, David Morgan Thomas
  • Patent number: 5885495
    Abstract: A method for controlling the viscosity of molten polymers, such as polycarbonate, takes place prior to a molding operation such as injection molding, extrusion, thermoforming or blow molding.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: March 23, 1999
    Inventor: Jean-Pierre Ibar
  • Patent number: 5851474
    Abstract: An injection moulding process for moulding a material in a mould having a mould cavity and at least one channel communicating with the mould cavity, each channel entering the mould at a respective mould inlet includes the steps of heating inner surface areas of the mould to a temperature above the heat distortion temperature of the material; supplying the molten material into the mould by way of at least one channel and subjecting the molten material to a propelling force, sufficient to propel it through the channel into the mould; causing the molten material in the mould to solidify; applying periodic forces to the material in the mould at a plurality of spaced-apart regions, first and second of the regions being located either side of molten material in the mould cavity, the periodic force being applied with a difference in phase so as to cause shear of molten material within the mould cavity between the first and second regions; cooling the mould below the heat distortion temperature of the resin while or
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: December 22, 1998
    Assignees: Brunel University of Uxbridge, Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Peter Stewart Allan, Michael John Bevis, Kazuharu Yasuda
  • Patent number: 5846475
    Abstract: Method and apparatus for reducing a shrinkage amount of a rubber member (51) which is comprised of a rubber (3) extruded from an extruder (1). At least one vibrator unit (10a, 10b) applies vibration to the extruded rubber (3) so as to increase the shrinkage speed of the extruded rubber (3) and cause a sufficient advance shrinkage of the extruded rubber within the extrusion train (1), thereby reducing a posterior shrinkage amount of the rubber member (51). An adjustable thermoregulator (30) maintains the extruded rubber (3) at a controlled temperature during application of vibration.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: December 8, 1998
    Assignee: Bridgestone Corporation
    Inventors: Masashi Yano, Yasuyoshi Kawaguchi
  • Patent number: 5837298
    Abstract: A vibrating hand trowel for finishing plastic concrete. The vibratory mechanism includes piezoelectric elements which vibrate at a high frequency when a voltage is applied to them. The trowel as a whole includes a top piece including a cover plate and handle, and a bottom piece including the piezoelectric elements mounted on a rib and a flat bottom which contacts the concrete. The top and bottom piece are preferably attached by a series of screws. The vibrating trowel is pulled over the concrete creating a smooth, wet layer useful for lubrication of the area where the trowel and concrete are in contact. This layer develops because the vibrations cause water and air to rise to the top of the concrete. The invention will allow for easy finishing of plastic concrete because of its lightweight and simple design. The invention will also create a smooth finish of the hardened concrete.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: November 17, 1998
    Assignee: Face International Corp.
    Inventors: Samuel A. Face, Jr., Glenn F. Rogers, Jr., Richard P. Bishop
  • Patent number: 5792393
    Abstract: A method of repairing damaged hot refractory linings in high-temperature vessels includes forming an opening through the outer shell of the vessel proximate to the damaged region of the hot refractory lining, and introducing a refractory material into the damaged region. The refractory material is rapidly injected in a sufficient amount to effect complete filling, and is fast curing to strength at the operating temperature of the vessel. The method eliminates the need to allow the vessel to cool down to ambient temperature and then reheat the vessel to operating temperature thereby eliminating thermal cycling of the refractory lining.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: August 11, 1998
    Assignee: Atlantic Richfield Company
    Inventor: Richard M. Smirnoff
  • Patent number: 5779953
    Abstract: A method and a slide casting apparatus for casting concrete products. Concrete is fed into a mold through a feeding hopper (9) fitted above the mould. The feeding hopper (9) is moved so that the vertical component of the path of motion of the hopper's bottom part is equal to or exceeds the vertical component of the path of motion of the top part, which >0 or =0.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: July 14, 1998
    Assignee: Partek Concrete Engineering Oy
    Inventors: Olli Harala, Risto Sutinen, Lassi Jarvinen
  • Patent number: 5770131
    Abstract: A process and apparatus for applying an oscillating force to a molten material. The apparatus includes a barrel in communication with a hopper for receiving a flow of moldable material. A screw conveyor is rotatable and axially reciprocatable within the barrel. At least one conveyor flight is formed on the screw conveyor for conveying and compressing the moldable material. Rotation and reciprocation of the screw conveyor forces the material to flow out of the barrel and along a conduit in a mold assembly. The conduit communicates with a mold cavity. A controller controls the rotation and reciprocation of the screw conveyor. The controller reciprocates the screw conveyor toward and away from the mold during filling of the mold cavity inducing a shearing of the material. Each reciprocation of the screw conveyor translates the screw conveyor closer toward the mold cavity. A method is also disclosed which includes dispensing a moldable material into an barrel.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: June 23, 1998
    Assignee: Thermold Partners, L.P.
    Inventors: Alexander Bubel, Robert Callahan, Akihisa Kikuchi
  • Patent number: 5766654
    Abstract: The knit line strength and other packing related properties both aesthetic and functional of injection molded polymeric products is improved by equipping the mold with packing pins. The packing pins are similar in construction to mold ejector pins and may also be mold ejector pins depending on mold configuration. The packing pins are sequentially actuated during or after filling of the mold to cause flow of plastic either transverse or parallel to the direction of flow in a to and from manner. The result is a kneading action in the viscous flow and an oriented layering effect in the solidified plastic much like a scarf joint at the knit line location. The irregular shape of the layers enhances the mechanical strength at the knit line in addition to increasing the likelihood that long chain molecules will re-entangle between the two melt flows at the knit line.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: June 16, 1998
    Inventor: Rodney J. Groleau
  • Patent number: 5705201
    Abstract: An apparatus and method includes a mold which defines a mold cavity with an inlet through which a molten, moldable material can pass into and/or through the mold cavity. A feeder for preparing the molten, moldable material, is spaced from the mold and expels the material to the mold cavity or to an accumulator connected to the mold cavity. A mechanism for controlling the temperature of the material in the feeder, accumulator, and the mold, as well as at least one gas injection unit with controls for the gas before, during and after its injection into the mold cavity and/or into gas channels located within and/or around the mold cavity are provided. A closed loop regulating system easily adjusts and regulates the gas flow and monitors the average gas pressure of the injected gas according to a programmed conditioning signal. The gas injection unit has relief valves and gas tanks.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: January 6, 1998
    Inventor: Jean-Pierre Ibar
  • Patent number: 5704972
    Abstract: The present invention provides a method and mixture for use in forming strong light-weight aggregate and includes by weight about; 68% to 95% fly-ash, 2% to 10% hydrated lime, and 3% to 12% alkali hydroxide such as Sodium Hydroxide. While many types of fly-ash may be used, Type F or Type C fly-ash are preferred. The admix is mixed with water to form a slurry including water in a range of 10% to 25% by weight of the dry mixture and the slurry is then compacted. The compacted slurry is then cured such as by using a rotary kiln or by in situ open air curing. The cured slurry is then allowed to hydrolyzed to form a hard material which then may be crushed and optionally screened to form an aggregate having a particular size or range of sizes.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: January 6, 1998
    Assignee: Trans Ash, Inc.
    Inventor: Daniel P. Ivkovich
  • Patent number: 5690766
    Abstract: Disclosed is a die bonding system comprising a conveyor 10, a speaker 12 and a function generator 14. The conveyor 10 carries a leadframe 14 bearing a prescribed quantity of die bonding epoxy 16. At a station situated above the speaker 12, a chip 18 is pressed down with a force F onto the epoxy and leadframe. While this force is being applied, the function generator 14 excites the speaker 12 to generate an acoustic signal sufficient to effect the vibration of the epoxy relative to the leadframe at a frequency of about 250 Hz and an amplitude of approximately 10 to 50 .mu.m, preferably 20 .mu.m. Such a vibration causes the epoxy to flow freely to a thin, uniform thickness, and thus permits the chip to be quickly bonded to the leadframe with a small force.
    Type: Grant
    Filed: August 16, 1995
    Date of Patent: November 25, 1997
    Assignee: The Trustees of the University of Pennsylvania
    Inventor: Kenneth John Zwick
  • Patent number: 5662846
    Abstract: A process for producing solid surface material is provided with a thin layer of filled polymer integrally formed with a backing of bubble-filled polymer, without an interface or transition zone in the polymer mix, using one-step casting, with vibration to aid separation of filler and bubbles.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: September 2, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Donald Eugene Swarts
  • Patent number: 5647931
    Abstract: In a method and an apparatus for producing three-dimensional objects by layerwise solidification of a material the problem is encountered that, in particular when using powdery or pasty material, a material layer having an exactly adjusted thickness can not be generated in a sufficiently fast manner. In order to solve this problem, it is proposed to scrape the material by means of a vibrating wiper member (21, 22) when applying the material or to provide a movable container (13) used for applying the material with such wiper members (21, 22) at the lower side thereof.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: July 15, 1997
    Assignee: EOS GmbH Electro Optical Systems
    Inventors: David Retallick, Hans J. Langer
  • Patent number: 5644891
    Abstract: An improved method of manufacturing an integral brick wall panel and particularly a novel vibrating mortar plow for use in such method to assist filling the mortar spaces between bricks and holes in the bricks with mortar. The vibrating mortar plow of the invention has a bottom mortar engaging face having a plurality of spaced, parallel fins which are adapted to be received in the mortar spaces between adjacent rows of bricks. The integral brick wall panel is provided with a plurality of cantilevering connectors by which the brick wall panel can be directly connected to a building structure or by which it can be connected to a backing layer to form a composite wall panel.
    Type: Grant
    Filed: May 11, 1995
    Date of Patent: July 8, 1997
    Inventor: Zygmunt Grant Kafarowski
  • Patent number: 5643509
    Abstract: A roller compacted concrete industrial floor slab is formed by surface finishing the slab by using a separate thin topping bonded to a roughened surface of the RCC, or by manipulating the RCC surface itself by working into its surface a finish mixture of cement-coated, rice-sized grit in a moisture saturated condition to fill any voids in the surface.
    Type: Grant
    Filed: July 24, 1995
    Date of Patent: July 1, 1997
    Assignee: Kalman Floor Company, Inc.
    Inventors: Carl N. Ytterberg, Ernest K. Schrader
  • Patent number: 5609802
    Abstract: A helmet making process includes the steps of opening the upper die with flash gates; heating the upper and lower dies in a oven with the use of an endless conveying device; inserting shape-molded plastic upper and lower shells respectively into the lower and upper and lower dies; filling a polyurethane mixture into the upper shell; shaking the upper and lower dies; heating the upper and lower dies to allow the polyurethane mixture to be foamed completely; piercing the foamed polyurethane through the air holes in the upper die; removing the semi-finished helmet; cooling the semi-finished helmet in air; cutting off the flashes and projected portions and recessed portions of the upper and lower shells; trimming and surface-treating the semi-finished helmet to form a finished helmet.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: March 11, 1997
    Inventor: Yen-Ming Jeng
  • Patent number: 5569426
    Abstract: A lightweight cement block and a method of producing the lightweight cement block, comprising the steps of mixing three parts by volume sawdust with water to form a first mixture having a relative moisture content in the range of 40% to 44%; adding one part by volume sand to the first mixture to form a second mixture; mixing the second mixture with water until the relative moisture content of the second mixture is in the range of 40% to 44%; adding one part by volume cement to the second mixture to form a third mixture; mixing the third mixture with water until the relative moisture content is in the range of 40% to 44%; forming the third mixture into a block. The resultant block comprises sawdust in the range of 30% to 70% by volume, sand in the range of 10% to 40% by volume and cement in the range of 10% to 40% by volume.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: October 29, 1996
    Assignee: Enviro Products Ltd.
    Inventor: Frank X. Le Blanc
  • Patent number: 5558823
    Abstract: A method for the production of substantially vertical walls, and specifically, walls made of concrete, includes a single sided concrete form used, for example, to form a concrete wall against a preexisting wall or embankment, by pumping concrete into a gap between the form and the preexisting wall or embankment, and raising the form vertically as the pumped concrete settles and drys. The method enables the construction of vertical walls of superior strength in less time as compared to currently available systems.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: September 24, 1996
    Inventor: Leroy D. Gray
  • Patent number: 5554326
    Abstract: A control method of an injection molding machine includes the steps of advancing a screw 2, injecting and filling the resin in a barrel cylinder 3 into a mold 4 to fill the mold, and then applying a predetermined holding pressure to the resin in the mold 4. The control method further includes the steps of performing an injecting and filling by using an injection cylinder 5 having a double-rod piston 6 which can advance and retreat the screw 2, and then controlling the injection cylinder 5 by a controlling signal Dc including a predetermined alternating current signal in such a manner that the screw 2 is reciprocated in a longitudinal direction as a center with an advance finish and. stop position Xs and a position at which the screw is moved so as to retreat by a predetermined distance from the advanced finish and stop position Xs. Thereby, the mold failure such an overpack and a burr is eliminated.
    Type: Grant
    Filed: April 14, 1995
    Date of Patent: September 10, 1996
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Makoto Nakazawa, Toshiyasu Koda, Tyuyoshi Arai
  • Patent number: 5543092
    Abstract: A method is disclosed for exerting a stress tensor on moldable material in a mold cavity. The method involves the steps of feeding a moldable material from a feeder to an accumulator. The material is preferably melted prior to accumulation within the accumulator so as to form a material flow. After at least a portion of the accumulator is filled, an oscillatory force is applied on the molten material in accordance with a predetermined program. A predetermined amount of material is then fed from the accumulator to a mold cavity through a mold inlet. The temperature of the mold is controlled in accordance with a predetermined program while an oscillatory force is applied to the material. The solidified article is then removed from the mold.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 6, 1996
    Assignee: Solomat Partners, L.P.
    Inventor: Jean-Pierre Ibar
  • Patent number: 5527175
    Abstract: Vibrational energy introduced into plastic concrete structures, such as concrete slabs, decks and similar or related concrete structures, at or near the natural resonant frequency of the liquid concrete mass, expedites the consolidation and setting of the concrete. A vibrating apparatus imparts controlled vibrations either onto the surface or beneath the surface of the concrete mass in sequential stages, the frequency of vibrations generally increasing with each subsequent stage, corresponding to the increase in the natural resonant frequency of the progressively-narrowing liquid concrete at the top of the structure. The relatively more consolidated and more dry concrete (typically near the bottom of the slab) is substantially unaffected by the non-resonant frequencies vibrations. In one modification, sensors determine the resonant frequency of the liquid concrete mass during each pass of the vibrator apparatus, and the frequency of the vibrating member is automatically adjusted, accordingly.
    Type: Grant
    Filed: December 3, 1993
    Date of Patent: June 18, 1996
    Inventors: Samuel A. Face, Jr., Bradbury R. Face, Glenn F. Rogers, Jr., Darrell Darrow, Richard P. Bishop
  • Patent number: 5520862
    Abstract: Vibrational energy introduced into plastic concrete structures, such as concrete slabs, decks and similar or related concrete structures, at or near the natural resonant frequency of the liquid concrete mass, expedites the consolidation and setting of the concrete. A vibrating apparatus imparts controlled vibrations either onto the surface or beneath the surface of the concrete mass in sequential stages, the frequency of vibrations generally increasing with each subsequent stage, corresponding to the increase in the natural resonant frequency of the progressively-narrowing liquid concrete at the top of the structure. The relatively more consolidated and more dry concrete (typically near the bottom of the slab) is substantially unaffected by the non-resonant frequencies vibrations. In one modification, sensors determine the resonant frequency of the liquid concrete mass during each pass of the vibrator apparatus, and the frequency of the vibrating member is automatically adjusted, accordingly.
    Type: Grant
    Filed: December 3, 1993
    Date of Patent: May 28, 1996
    Inventors: Samuel A. Face, Jr., Bradbury R. Face, Glenn F. Rogers, Jr., Darrell Darrow, Richard P. Bishop
  • Patent number: 5484563
    Abstract: An injection molding process includes using a mold provided with a resin reservoir having a retractable piston and protruding from a mold cavity in at least one of divided resin passages ranging from the point where the injected molten resin is divided into two streams to a weld formed by the union of the resin streams, feeding the molten resin into the mold while the piston is in a retracted or advanced state to form the weld, and either advancing the piston toward the mold cavity side to force the resin from the resin reservoir into the cavity or retracting the piston to withdraw the resin from the cavity side into the resin reservoir so as to cause the migration of the resin in the weld to thereby force the resin on one side of the weld into the resin on the other side, thus reinforcing the weld, and which is capable of remarkably improving the strength of the weld and its periphery of a molding which otherwise forms a weld having an extremely low strength.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: January 16, 1996
    Assignee: Polyplastics Co., Ltd.
    Inventors: Hirotaka Miyazaki, Hiromitsu Sakai, Tsuneyoshi Okada
  • Patent number: 5476617
    Abstract: A molding process and apparatus produces molded parts from cellulosic fibers. A dry process molds cellulosic fibers including the steps of mixing the cellulosic fibers and a binder to form a substantially homogeneous mixture; distributing the mixture to a desired pre-form, preferably having a non-uniform cross-section; and molding the pre-form, under a predetermined pressure and heat, to form a molded part having a substantially uniform density. A distribution assembly distributes the mixture to a desired pre-form by rotational and/or vibrational motion. The rotor on the upper surface of the telescoping portion of the distribution assembly cylindrically rotates to mechanically move the mixture in a desired pre-form shape. The rotor may be unevenly weighted such that as it rotates, the distribution assembly vibrates thereby mechanically distributing the mixture by causing it to settle in the cartridge in the desired pre-form shape.
    Type: Grant
    Filed: February 19, 1993
    Date of Patent: December 19, 1995
    Assignee: The Board of Regents of the University of Wisconsin
    Inventors: Brent English, Charles G. Brey, Larry D. Hjelter, Ulo H. Vaher, Charles E. Yost
  • Patent number: 5466317
    Abstract: A building panel and method of forming it are disclosed in which the panel includes inner and outer polymer facing sheets and a rigid foam core with the facing sheets joined securely to the core by glass fibers embedded in the facing sheets and projecting from them into the core.
    Type: Grant
    Filed: January 5, 1994
    Date of Patent: November 14, 1995
    Assignee: Aluminum Company of America
    Inventors: Herb Lause, Sylvia Moore, Clif Seltzer, Cliff Taylor, Dan King
  • Patent number: 5457263
    Abstract: A method of producing a concrete container for storage of radioactive waste includes the steps of providing a double-walled mold with an inner and an outer wall, the mold being open at the top and having an interior for receiving the radioactive waste. The space between the inner and the outer walls is filled with fibers. Subsequently, a concrete mixture is filled into the space between the inner and the outer walls to a level below the uppermost layer of fibers. The interior is closed off by a cover plate. After placing more fibers onto the cover plate a concrete mixture is poured onto the fibers until they are completely covered. Alternatively, it is possible to place a cover plate onto the inner wall for closing of the interior after insertion of the radioactive waste, fill the space between the inner and the outer walls with fibers, and place additional fibers onto the cover plate.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: October 10, 1995
    Assignee: University of New Mexico
    Inventor: Jerry W. Berglund
  • Patent number: 5437820
    Abstract: A process for creating a three-dimensional shaped object by providing a container having a fluidized bed of fusable particles therein and a base plate disposed within the particle bed below an upper level of the particles. A heat beam is directed in a desired pattern onto the upper level of particles above the base plate to fuse certain of the particles together to form a formed shape with the base plate then being lowered. A new upper level of fusable particles from the particle bed covers the formed shape, selected of which particles are then heated by the heat beam in a desired pattern to fuse the thus-heated particles to one another and to fuse the particles to the previously fused formed shape of particles with the process continuing until the desired three-dimensional shaped product is formed and removed from the particle bed.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: August 1, 1995
    Inventor: Gregory R. Brotz
  • Patent number: 5435951
    Abstract: A process for producing a slab of stony material by filling of a mold (42) with a mixture of stony material for the realization of a slab of the material, supplying the mixture with a volumetric distributor with rotating blades (92) and moving the volumetric distributor from a first end to the other end of the mold (42) and then returning the distributor to the first end with the blades (92) in a swinging motion or angle widening motion, and stopping the distributor for a prefixed period of time at each end, during which time the blades (92) are given a limited rotation in the direction of the stopped end.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: July 25, 1995
    Inventor: Luca Toncelli
  • Patent number: 5403525
    Abstract: A reseal member having a preferentially weakened central portion, and a method of its manufacture through the application of ultrasonic energy. The reseal is for use with an associated blunt cannula. The reseal comprises a central region and a peripheral region. The central region has a predetermined thickness and includes, in the direction of thickness, a weakened portion extending at least partially therethrough. The upper and lower surface portions of the reseal are continuous and unbroken. A method of forming the weakened central portion includes the steps of positioning the reseal member in an ultrasonic energy generating device, placing the member in compression, and imparting a predetermined amount of ultrasonic energy, in the form of vibrational energy, into the reseal member. The present reseal member can be used for solution vials and containers, tubing set Y-sites, and similar applications.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: April 4, 1995
    Assignee: Abbott Laboratories
    Inventors: R. Hayes Helgren, Thomas E. Mattice
  • Patent number: 5399305
    Abstract: A polymeric article having isotropic properties is fabricated from anisotropic materials by orienting the polymer, as well as any fillers, in different directions at different planes through the polymeric article. In a first embodiment, molten polymer is passed between movable gate members (32 and 34) into cavity (30) of mold (28). The movable gate members (32 and 34) impart a strain on the molten polymer by moving in opposite directions (33 and 35) while the molten polymer is dispensed into the cavity (30). Reciprocating the movable gate members (32 and 34) yields a herringbone pattern. Having at least one movable gate member (38) have comb-like projections (40) can assure the strain is imparted deeper into the thickness of the polymeric article.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: March 21, 1995
    Assignee: International Business Machines Corporation
    Inventors: Arthur Bross, Thomas Walsh
  • Patent number: 5387380
    Abstract: A process for making a component by depositing a first layer of a powder material 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: June 5, 1992
    Date of Patent: February 7, 1995
    Assignee: Massachusetts Institute of Technology
    Inventors: Michael Cima, Emanuel Sachs, Tailin Fan, James F. Bredt, Steven P. Michaels, Satbir Khanuja, Alan Lauder, Sang-Joon J. Lee, David Brancazio, Alain Curodeau, Harald Tuerck
  • Patent number: 5385701
    Abstract: Disclosed herein are a method for molding a high density and homogeneous silicon nitride ceramics within a short time and an apparatus used for the method. A gel-like slurry mixture which is a mixture of ceramic powders consisting mainly of Si.sub.3 N.sub.4 and a liquid and has a powder content of from 45 vol % to 60 vol % is fluidized by imparting thereto a strain by vibration, and the mixture under the fluidized state is filled into, and molded by, a mold. Preferably, the entire part or a part of the mold is made of a liquid permeable material. The vibration preferably has an acceleration of from 0.1 G to 150 G and an amplitude of 1 .mu.m to 1 cm. Furthermore, the viscosity of the slurry filled into the mold is preferably from 2,000 to 20,000 cps.
    Type: Grant
    Filed: July 24, 1992
    Date of Patent: January 31, 1995
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Tomoyuki Awazu, Yasushi Tsuzuki, Osamu Komura, Akira Yamakawa
  • Patent number: 5368792
    Abstract: A graphite panel (10) with a hole (11) having a damaged thread (12) is repaired by drilling the hole (11) to remove all of the thread and make a new hole (13) of larger diameter. A bolt (14) with a lubricated thread (17) is placed in the new hole (13) and the hole (13) is packed with graphite cement (16) to fill the hole and the thread on the bolt. The graphite cement (16) is cured, and the bolt is unscrewed therefrom to leave a thread (20) in the cement (16) which is at least as strong as that of the original thread (12).
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: November 29, 1994
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: William W. Short, Cecil Spencer
  • Patent number: 5364577
    Abstract: A method for manufacturing a vacuum insulation panel is provided which includes the steps of: drying a quantity of microporous powder; evacuating the powder of gases; evacuating a gas impermeable bag of gases; loading the powder into the gas impermeable bag while the bag and powder remain in an evacuated condition; and sealing the gas evacuated bag with the gas evacuated powder therein to form a vacuum insulation panel. The powder in the bag should be compacted before the bag is sealed and also a trace amount of helium may be injected into the bag prior to sealing to assist in leak detection of the sealed panel. The panel with injected helium has an internal pressure not exceeding 1 mm Hg.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: November 15, 1994
    Assignee: Whirlpool Corporation
    Inventors: Nihat O. Cur, Richard W. Kruck
  • Patent number: 5346660
    Abstract: A powder molding is manufactured from various powdery materials including an inorganic material, an organic material, a metallic material, etc., according to a wet forming process. A powdery material and a solvent are mixed into a mixture so that the mixture exhibits a dilatant flow. The mixture is molded into a molding of desired shape, and then the molding is dried.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: September 13, 1994
    Assignee: Toto Ltd.
    Inventor: Akio Matsumoto
  • Patent number: 5339589
    Abstract: An aggregate floor including terrazzo and the like and a method for forming the floor on a supporting surface, the floor including a layer of flexible compound applied to the surface, a reinforcement mesh positioned between divider strips and adjacent the compound and supporting a layer of compacted aggregate forming a substantially level surface. The divider strips are selectively positioned in desired configurations on the flexible compound layer to divide the mesh and aggregate into discreet and crack controlled sections. A mixture of composite cement, water and, in some cases, sand is applied to the surface of the aggregate layer in such a viscosity as to gravitate completely through the aggregate layer and make contact with the underlying layer of flexible compound. Such permeation fills and replaces the air pockets between the aggregate particles and deposits sufficient top coating on the surface of the aggregate to be polished to a finished surface.
    Type: Grant
    Filed: February 12, 1993
    Date of Patent: August 23, 1994
    Inventor: John H. Thrower
  • Patent number: 5330691
    Abstract: Glass fibre reinforced plasterboard including a gypsum matrix of high density with embedded staple glass fibres therewith forming a pressure resistant solid body frame in which are embedded a plurality of very small hollow spaces of 5-350 microns in diameter, produced by a fine-pore foam or at least partially by small particles of non-porous and non-water absorbing fillers. During the manufacturing process of such glass fibre reinforced gypsum board, the gypsum and the fibre pieces are given only so much water that the water/gypsum ratio does not exceed 0.6, whereafter a foam and/or pourable or free-flowing fillers are added in such quantities that the apparent density of the entire board is at least 20% smaller than the density of the bonding means component of the matrix, and the paste is subjected while being formed to a vibration.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: July 19, 1994
    Assignee: N.V. Recdo S.A.
    Inventor: Emmanuel H. C. A. Geeraert
  • Patent number: 5320790
    Abstract: A patterned tool and method for producing a durable tactile warning surface for sidewalks and other walkways including pouring a concrete base, applying pigmented or colored hardener to the upper surface of the concrete base, stamping the upper surface of the concrete base with the patterned tool including a substantially flat member having a plurality of symmetrically disposed recesses of a predetermined diameter and depth formed on the lower surface thereof and a plurality of corresponding vent channels formed through the substantially flat member in communication with each corresponding recess and curing the concrete base to form a durable tactile warning surface including a plurality of symmetrically disposed raised elements of a predetermined diameter, height and spacing corresponding to the plurality of recesses to produce an uneven surface visually contrasting with adjacent surface areas.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: June 14, 1994
    Inventor: Michael Lowe
  • Patent number: 5268226
    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 relatively inexpensive cementitious slurry binder. The core is covered on one or more of its surfaces with a high strength outer layer constructed of layers of non-woven fabric material impregnated with a cementitious slurry binder having a different formulation than the core cementitious slurry binder to effectively bond with the fibers in the layers of non-woven fabric material to form a three-dimensional reinforcement matrix for the outer layer cementitious slurry binder.
    Type: Grant
    Filed: April 9, 1993
    Date of Patent: December 7, 1993
    Assignee: Diversitech Corporation
    Inventor: Jeff S. Sweeney
  • Patent number: 5262103
    Abstract: Disclosed is a cold molding process for the production of a unitary article from a plurality of plastic particles. The process may be conducted without the addition of heat. A plurality of homogeneous or heterogeneous plastic particles are introduced into a mold, softened by exposure to a softening agent, and thereafter compressed to form the unitary article. Preferred softening agents comprise an organic component and an aqueous component. One preferred softening agent-plastic combination comprises aqueous methylethylketone and polystyrene.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: November 16, 1993
    Assignee: Versi-Corp
    Inventor: James P. LaPoint
  • Patent number: 5260012
    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 27, 1992
    Date of Patent: November 9, 1993
    Assignee: Husky Injection Molding Systems Ltd.
    Inventor: Robin Arnott
  • Patent number: 5254298
    Abstract: A process for manufacturing molded plastic products wherein the process includes:(a) subjecting a mold to a mold preconditioning stage by heating it to a temperature which is conducive for molding a deformable plastic material therein,(b) introducing a deformable plastic material into or over a cavity defined within the preconditioned mold,(c) molding the deformable plastic material,(d) heat-treating the molded plastic material by subjecting it to a treating temperature (T.sub.O) which is at least equal to about 1.0 times the value of the material's glass transition temperature (T.sub.g), when T.sub.g is expressed in degrees Kelvin,(e) subjecting the mold and the heat-treated material to a rheological transformation process preconditioning stage by adjusting the temperature to one which is conducive for a rheological transformation process,(f) subjecting the preconditioned material to a rheological transformation process, and(f) removing the molded product from the mold.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: October 19, 1993
    Assignee: Solomat Partners, L.P.
    Inventor: Jean-Pierre Ibar
  • Patent number: 5248456
    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: May 17, 1991
    Date of Patent: September 28, 1993
    Assignee: 3D Systems, Inc.
    Inventors: Herbert E. Evans, Jr., Ernest W. Ertley, Charles W. Hull, Richard N. Leyden
  • Patent number: 5244378
    Abstract: A polymeric article having isotropic properties is fabricated from anisotropic materials by orienting the polymer, as well as any fillers, in different directions at different planes through the polymeric article. In a first embodiment, molten polymer is passed between movable gate members (32 and 34) into cavity (30) of mold (28). The movable gate members (32 and 34) impart a strain on the molten polymer by moving in opposite directions (33 and 35) while the molten polymer is dispensed into the cavity (30). Reciprocating the movable gate members (32 and 34) yields a herringbone pattern. Having at least one movable gate member (38) have comb-like projections (40) can assure the strain is imparted deeper into the thickness of the polymeric article.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: September 14, 1993
    Assignee: International Business Machines Corporation
    Inventors: Arthur Bross, Thomas Walsh
  • Patent number: 5242646
    Abstract: A method of forming a fastener member having a base and a plurality of headed stems arranged in columns and rows and projecting from the base. The fastener member is formed by injection molding a molten material into a base mold, sacrificial stem mold and head mold, wherein the material is solidified. After the base mold and head mold are removed, the stem mold may be destructively removed to release the fastener member.
    Type: Grant
    Filed: May 7, 1992
    Date of Patent: September 7, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Shinji Torigoe, Jiro Hattori, Akimitsu Takagi
  • Patent number: 5225125
    Abstract: A lid (1) is injection-molded of polyethylene, for a widemouthed barrel of a synthetic resin, and includes an outer rim (4) encompassing the barrel neck (3) and an inner rim (5) dipping into the barrel neck. The outer lid rim (4) and inner lid rim (5) form an annular space (7), an annular web (8) projecting axially from the base of this space. For producing the lid gasket (13), the annular space (7) is exposed to an open flame for activating the annular space surface. Subsequently the sealing material, preferably polyurethane, is injected from a foaming machine into the base of the annular space (7), and thereafter the lid (1) is vibrated in order to degasify the gasket (13). The sealing material, preferably consisting of foamed polyurethane, contains a parting compound having a long-term effect.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: July 6, 1993
    Assignee: Schutz-Werke GmbH & Co. KG
    Inventors: Eberhard Wildfeuer, Thomas Erll