Miscellaneous Patents (Class 264/349)
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Patent number: 6012963Abstract: A system of colored, scented dolls is provided each constructed from a molded vinyl with a coloring substance and a scenting substance mixed therewith. The vinyl is molded in the form of a human, wherein the coloring substance and scenting substance are combined together in combinations selected from the group of combinations including red and cherry, green and lime, orange and orange, yellow and lemon, and purple and grape.Type: GrantFiled: September 3, 1998Date of Patent: January 11, 2000Inventor: Lena M. Lee
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Patent number: 5972273Abstract: Disclosed is a method for producing a homogeneous polycarbonate composition, which comprises feeding a first polycarbonate in a molten state to a first inlet of an extruder, while feeding a mixture of an second polycarbonate and at least one thermal stabilizer to a second inlet of the extruder, wherein the second inlet is disposed downstream of the first inlet, and extruding the first polycarbonate and the mixture through the extruder. By the method of the present invention, additives can be uniformly dispersed in a molten polycarbonate without dissolving the additives in a solvent, and a polycarbonate composition of the polycarbonate and the additive, which has various excellent properties, such as excellent thermal stability, can be produced efficiently.Type: GrantFiled: August 21, 1996Date of Patent: October 26, 1999Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventor: Hiroshi Hachiya
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Patent number: 5958316Abstract: Toughened thermoplastics are prepared by mechanically dewatering a water-moist elastomer component A containing up to 50% by weight of residual water and mixing the resulting dewatered elastomer component A' with a thermoplastic polymer B in a mixing unit, by a process in which the elastomer component A is fed to a twin-screw extruder which has corotating screws and essentially includes, in the transport direction,one unheated metering section in which the elastomer component A is fed to the extruder by a metering means,at least one unheated squeeze section which serves for dewatering and contains at least one retarding element and in each case at least one associated dewatering orifice,at least one section in which the thermoplastic polymer B is introduced as a melt into the extruder,at least one section provided with mixing, kneading or other plasticating elements or combinations of these elements,at least one devolatilization section which is provided with at least one devolatilization orifice and in whichType: GrantFiled: March 22, 1996Date of Patent: September 28, 1999Assignee: BASF AktiengesellschaftInventors: Norbert Guntherberg, Jurgen Hofmann, Hilmar Ohlig, Elmar Mailahn, Klaus Bus, Bernhard Czauderna, Sven Grabowski
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Patent number: 5951940Abstract: A method of recycling mixed post-consumer plastics waste includes the steps of providing mixed post-consumer plastics waste including polyolef in and non-polyolefin components, and melt-compounding the waste so as to form a continuous phase including a blend of the polyolefin components with the non-polyolefin components microdispersed therein. Preferably, the waste also includes one or more intrinsic compatibilizers, and the method includes the intrinsic compatibilizers at least partially compatibilizing the microdispersed components in the continuous phase.Type: GrantFiled: March 20, 1996Date of Patent: September 14, 1999Assignee: Rutgers, The State UniversityInventors: Thomas J. Nosker, Richard W. Renfree, Raymond G. Saba, Jose R. Fernandes, Kenneth E. Van Ness
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Patent number: 5951928Abstract: 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: GrantFiled: June 20, 1997Date of Patent: September 14, 1999Assignee: South China University of TechnologyInventor: Qu Jinping
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Patent number: 5939001Abstract: The invention pertains to processes for manufacturing objects and in particular moulded components from fiber-reinforced thermoplastic resins. The process involves blending a thermoplastic resin with reinforcing fibers, plasticating the blend with the addition of heat inside a screw-type extruder and extruding a plasticated mass for moulding. The thermoplastic resin is fed to the screw-type extruder in powder form and in a blend with the reinforcing fibers.Type: GrantFiled: December 27, 1996Date of Patent: August 17, 1999Assignee: Becker Group Europe GmbHInventors: Michael Heber, Reinhard Kreitlow, Leo Rosenkranz, Markus Ingendae, Gunter Nebelung, Rudolf Kleinholz
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Patent number: 5935510Abstract: The use of comminuted, recycled glass powders as a filler in molded plastic parts is disclosed. The recycled glass preferably has rounded edges, which is a distinct advantage over conventional ground glass which has extremely sharp edges. Suitable comminuted glass is free from contaminants such as grinding compounds. The comminuted recycled glass filler can be used with a variety of different thermoplastics commonly used to in injection molding, rotational molding, and blow molding of plastic parts.Type: GrantFiled: November 10, 1997Date of Patent: August 10, 1999Assignee: R & J Hansen, L.L.C.Inventor: Richard W. Hansen
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Patent number: 5932159Abstract: A screw extruder (10), including a barrel (18) having a bore (26) which defines an inner surface (24). At least one extruder screw (28) is positioned within the bore (26), each screw (28) further including a central shaft (34) and at least one screw flight (30). Each screw flight (30) further includes a front pushing face (36) and a rear face (38). The profile (40) of each front pushing face (36) acts with the inner surface (24) of the barrel (18) to form a progressively narrowing passage (46) through which material is forced into multiple regions of high elongational and shear stress (48) which act to break down agglomerates of material and thus dispersively mix the material.Also presented is a screw extruder (100) having a single screw (28) which includes dispersion disks (102) which are rotationally offset from one another and whose design is not constrained by interaction with a second disk, which provides improved distributive and dispersive mixing.Type: GrantFiled: November 7, 1997Date of Patent: August 3, 1999Assignee: Rauwendaal Extrusion Engineering, Inc.Inventor: Chris J. Rauwendaal
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Patent number: 5928586Abstract: A melt extrusion processing method of a thermoplastic resin, wherein a thermoplastic resin having a flow temperature of 200.degree. C. or higher is subjected to extrusion processing using a melt kneading type extruder in which a vent port is provided at a downstream position by length L from the most upper stream portion of a melt kneading type extruder screw and L/D is from 4 to 18 (wherein D indicates the screw diameter and D and L are in the same scale unit), while continuously sucking from the said vent port at a reduced pressure of lower then 660 mmHg.The invention provides a method which causes little resin degradation in an extruder to give an extruded article containing small amounts of discolored and degraded materials even when the processing is conducted for a relatively long time.Type: GrantFiled: October 17, 1997Date of Patent: July 27, 1999Assignee: Sumitomo Chemical Co., Ltd.Inventors: Hideo Nomura, Mituo Maeda
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Patent number: 5925295Abstract: A pre-plasticizing type injection molding machine includes a plasticizing device for plasticizing a molding material supplied from a hopper by a first screw disposed within a first barrel, an injection device 8 for measuring a molten resin supplied from the plasticizing device 5 and for injecting the measured molten resin by a second screw disposed within a second barrel. A switching valve is provided in a resin passage between a resin outlet of the plasticizing device and a resin inlet of the injection device, and an accumulation device is provided for housing a pushing plunger having a stock chamber communicated with the resin passage at a position between the switching valve 10 and the resin outlet of the plasticizing device.Type: GrantFiled: April 24, 1997Date of Patent: July 20, 1999Assignee: Nissei Plastic Industrial Co., Ltd.Inventors: Nobuyuki Nakamura, Kishihiro Yamaoka
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Patent number: 5922257Abstract: A process to produce an article having a granite-like appearance is disclosed which consists essentially of (a) extruding a first mixture to form a second mixture; and (b) using the second mixture to form an article having a granite-like appearance. The first and second mixtures are in the form of particles where the first mixture consists essentially of about 99 to about 90 wt. % of a first particle composition and about 1 to about 10 wt. % of a second particle composition. The first particle composition consists essentially of a first polymer which consists essentially of a thermoplastic (co)polymer of ethylene and the second particle composition consists essentially of a colorant and a second polymer which consists essentially of a crosslinked thermoset (co)polymer of ethylene.Type: GrantFiled: September 9, 1997Date of Patent: July 13, 1999Assignee: Phillips Petroleum CompanyInventor: James E. Keesling
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Patent number: 5910276Abstract: Toughened thermoplastics are prepared by mechanically dewatering a water-moist elastomer component A containing up to 60% by weight of residual water and mixing the resulting dewatered elastomer component A' with a thermoplastic polymer B in an extruder, by a process in which the elastomer component A is fed to a twin-screw extruder which has corotating, in each case double-flight, screws and essentially includes, in the transport direction,a metering section in which the elastomer component A is fed to the extruder by a metering means,at least one squeeze section which serves for dewatering and contains at least one retarding element and in each case at least one associated dewatering orifice,at least one section provided with a conveying screw or at least one section provided with mixing, kneading or other plasticating elements or combinations of these elements,at least one section in which the thermoplastic polymer B is introduced as a melt into the extruder,at least one section provided with mixing, kneadType: GrantFiled: March 22, 1996Date of Patent: June 8, 1999Assignee: BASF AktiengesellschaftInventors: Norbert Guntherberg, Jurgen Hofmann, Hilmar Ohlig, Elmar Mailahn, Klaus Bus, Bernhard Czauderna, Sven Grabowski
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Patent number: 5908592Abstract: A liquid silicone rubber base including (A) an alkenyl-containing organopolysiloxane, (B) a reinforcing silica filler, (C) a mixing assistant in the form of a silanol-containing compound, (E) an organohydrogen polysiloxane, (f) a platinum catalyst and optionally, (D) a wetting auxiliary catalyst is prepared by previously mixing 10-120 parts of component (A) with 1-35 parts of component (C) and 0-35 parts of component (D) to form a premix liquid, mixing the premix liquid with 100 parts of component (B) to form a premix power, and kneading the premix powder with the remainder of component (A). By adding a curing agent of organohydrogenpolysiloxane/platinum catalyst to the liquid silicone rubber base, there is obtained a liquid silicone rubber composition having improved fatigue endurance.Type: GrantFiled: November 6, 1997Date of Patent: June 1, 1999Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kenichi Kimura, Takeo Yoshida, Manabu Narumi, Masaya Arakawa
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Patent number: 5901964Abstract: A stripper rubber for oil and gas wells, water and geo-thermal wells, having an interior surface design which includes a circular, convex knee portion in the throat area of the stripper rubber to provide additional support to the stripper rubber during insertion of a tubular member through the stripper rubber. The composition for the stripper rubber includes, in one embodiment, enhanced wear characteristics by the addition of milled fibers of Twaron.RTM. mixed homogeneously throughout the stripper rubber.Type: GrantFiled: February 6, 1997Date of Patent: May 11, 1999Assignee: John R. WilliamsInventors: John R. Williams, Don M. Hannegan
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Patent number: 5879597Abstract: In a method for operating a drive, in particular for an injection system of an injection molding machine, wherein a spindle (7) is provided drivable by a first electric motor (14), on which spindle a nut (15) is borne which is drivable by a second electric motor (20) and borne so as to be axially non-displaceable, a translation movement of the spindle (7) is brought about by driving the nut (15) by means of the second electric motor (20) or by driving the spindle (7) by means of the first electric motor (14). To increase the dynamics of the driving during the conveyance of an acceleration or, respectively, retardation ramp of the translation movement of the spindle (7) by means of one of the two electric motors (14, 20) the other electric motor (20, 14) is briefly driven in that rotational direction which supports the acceleration or, respectively, the retardation of the translation movement of the spindle (7).Type: GrantFiled: December 16, 1996Date of Patent: March 9, 1999Assignee: Engel Maschinenbau Gesellschaft m.b.H.Inventor: Otto Urbanek
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Patent number: 5863485Abstract: An innovative method and apparatus for synchronizing the flows of molten polymer or similar materials in molding systems which utilize manifolds to direct flow into one or more cavities of an injection mold. The apparatus utilizes intermeshing positive displacement, interconnected gearing systems similar to positive displacement gear pumps in hydraulic systems. These positive displacement gear mechanisms are placed in each parallel flow channel such that all flow in each channel passes through a gear mechanism. Each of the parallel pumps are connected together directly via a shaft or indirectly using hydraulic motors, stepper motors, or other motors to synchronize the parallel flows. Each flow can be different to allow the directing of flows in complex tools or when molding parts in family molds.Type: GrantFiled: March 20, 1997Date of Patent: January 26, 1999Inventor: Rodney J. Groleau
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Patent number: 5863297Abstract: This invention provides molded, biodegradable porous polymeric implant materials having a pore size distribution throughout the material which is substantially uniform. These materials can be molded into implants of any desired size and shape without loss of uniformity of pore size distribution. The implants are useful as biodegradable scaffolds for cell growth in healing of tissue defects. When manufactured to have an aspect ratio greater than about 3, the implants can be further hand-shaped to fit the defect into which they are placed and the desired shape for the regrown tissue.Type: GrantFiled: October 8, 1996Date of Patent: January 26, 1999Assignee: OsteoBiologics, Inc.Inventors: Mary Ann Walter, Neil C. Leatherbury, Mark Q. Niederauer
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Patent number: 5851463Abstract: Toughened thermoplastics are prepared by mechanically dewatering a water-moist elastomer component A containing up to 50% by weight of residual water and mixing the resulting dewatered elastomer component A' with a thermoplastic polymer B in a mixing unit, by a process in which the elastomer component A is fed to a twin-screw extruder which has corotating, in each case triple-flight, screws and essentially includes, in the transport direction,one unheated metering section in which the elastomer component A is fed to the extruder by a metering means,at least one squeeze section which serves for dewatering and contains at least one retarding element and in each case at least one associated dewatering orifice,at least one section in which the thermoplastic polymer B is introduced as a melt into the extruder,at least one section provided with mixing, kneading or other plasticating elements or combinations of these elements,at least one devolatilization section which is provided with at least one devolatilizationType: GrantFiled: March 22, 1996Date of Patent: December 22, 1998Assignee: BASF AktiengesellschaftInventors: Norbert Guntherberg, Jurgen Hofmann, Elmar Mailahn, Hilmar Ohlig
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Patent number: 5830395Abstract: A process for making a substantially uniform composition of short aramid fibers and polymer wherein the fibers are provided with a significant moisture content to improve handling characteristics and are partially dried and opened by shear forces in an extruder before contact with the polymer in the extruder.Type: GrantFiled: August 12, 1997Date of Patent: November 3, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Giorgio P. Vercesi, Jean Pierre Jakob, Nicolas Cudre-Mauroux
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Patent number: 5817266Abstract: Essentially dry materials are obtained by mechanically dewatering water-moist rubber, prepared by emulsion polymerization and precipitation, to give a compact material having a rubber content of at least 50%, by a process in which the previously dewatered rubber is fed to the feed section of a twin-screw extruder which has screws rotating in the same direction and possesses, in succession in the conveying direction, at least two back-up zones and two associated dewatering orifices, each of which may be provided with a retaining screw, and at least one kneading zone, one devolatilization zone and finally one discharge zone, which may be closed by a die lip, and the water separated off is discharged at the dewatering orifices in liquid form.Type: GrantFiled: October 24, 1996Date of Patent: October 6, 1998Assignee: BASF AktiengesellschaftInventors: Norbert Guntherberg, Jurgen Hofmann, Hilmar Ohlig, Elmar Mailahn, Friedrich Seitz, Hermann Gausepohl, Jurgen Koch, Andreas Deckers
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Patent number: 5811036Abstract: A process for recycling a thermoplastic resin covered with a thermosetting-resin paint film includes the steps of decomposing the paint film by bringing the thermoplastic resin covered with the paint film into contact with a paint-film-decomposing agent in a molten state, and removing decomposed products, resulting from the paint film and the paint-film-decomposing agent, and the residual paint-film-decomposing agent by degassification to prepare a recycled resin. The paint-film-decomposing agent can be primary amines and/or secondary amines having a boiling point of 250.degree. C. or less, or being decomposed at 250.degree. C. or less, or can be tertiary amines and/or quaternary amines having a boiling point of 250.degree. C. or less, or being decomposed at 250.degree. C. or less to which water and/or alcohols is added.Type: GrantFiled: April 26, 1996Date of Patent: September 22, 1998Assignees: Toyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Naoyuki Takahashi, Sadao Ikeda, Yoshio Taguchi, Narihito Tatsuda, Norio Sato, Kenzo Fukumori
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Patent number: 5811038Abstract: This invention relates to the manufacture of flexible porous plastic irrigation and aeration pipe having an essentially uniform porosity throughout its length. The process for making the porous pipe includes volumetrically delivering to a mixing hopper for preblending thermoset polymer particles and a thermoplastic binder for the particles, preblending the components in the hopper, volumetrically feeding from the hopper the preblended components for controlled discharge into an extruder, and extruding the preblended components to produce the porous plastic pipe.Type: GrantFiled: September 27, 1996Date of Patent: September 22, 1998Assignee: Plastic Specialties and Technologies Investments, Inc.Inventor: William S. Mitchell
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Patent number: 5811048Abstract: A method and apparatus for homogenizing a flow stream of plasticized material supplied from an extruder, to reduce viscosity gradients causing defects in extruded products, wherein a flow inverting homogenizer positioned in the flow stream and incorporating a plurality of criss-crossing channels for simultaneously transferring portions of the flow stream from central to peripheral flow stream locations and other portions of the flow stream from peripheral to central flow stream locations.Type: GrantFiled: May 22, 1997Date of Patent: September 22, 1998Assignee: Corning IncorporatedInventors: Rodney G. Dunn, David R. Treacy, Jr., Michael E. Zak
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Patent number: 5807517Abstract: An apparatus for heating and blending thermoplastic material prior to delivering the material into the barrel of an extruder. The apparatus, has an elongated housing which contains two intermeshing feed screws that are driven to rotate in the same direction. Controlled heating is provided by electric band heaters which encircle the exterior of the housing, and electric cartridge heating elements fitted into aluminum cores that are received by an axial bore in each of the feed screws.Type: GrantFiled: April 8, 1997Date of Patent: September 15, 1998Assignee: Cincinnati Milacron Inc.Inventors: Siegfried R. Wissmann, William T. Schmitt, David E. Murdock
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Patent number: 5798077Abstract: A plasticating screw and method of plasticating without thermal degradation problems. Said screw having a metering section with a helical flight disposed within and cooperating with the innerwall of a heated barrel. In particular, solid resinous material is introduced to a helical valley extending between said flight. The resinous material is heated and plasticized by said apparatus while being advanced along a helical path towards an outlet opening by the rotation of said screw. The bottom surface of the helical valley in said metering section having a plurality of geometrically shaped surfaces in side-by-side relation with at least two of said shaped surfaces being sloped. During operation, the level differential between the shaped surfaces induces a continuous tumbling, variable shear and mixing action upon the molten resin as the molten resin in the metering section flows along the helical path.Type: GrantFiled: November 4, 1996Date of Patent: August 25, 1998Assignee: Spirex CorporationInventors: Timothy W. Womer, Paul N. Colby, Harry F. White
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Patent number: 5791637Abstract: A tubular compression spring body made of a thermoplastic elastomeric material has stepped internal and external wall surfaces that are designed so that when the body is compressed, it absorbs a large amount of the compression energy and has a low rebound force. Also, when compressed again after rebound, the compression spring body exhibits excellent repeatability in its force-displacement performance. In different embodiments, the compression spring body may be designed to exhibit various force-displacement performance curves in order to meet various criteria desired by the user, such as maximum energy absorption and/or minimum rebound force.Type: GrantFiled: January 11, 1996Date of Patent: August 11, 1998Assignee: Iso Dynamics, Inc.Inventors: James Kermit Reichelt, Richard Keith Reichelt
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Patent number: 5788761Abstract: A process in which the conventional sulfate components in an aerated concrete mixture, such as gypsum, semihydrate or anhydrite, are replaced at least in part by calcium aluminum sulfates and/or calcium aluminate sulfate hydrates. As a result, agglomeration of the lime, retardation of the lime hydration, and aftergrowth of the cut aerated concrete cakes are reduced or even ruled out. In addition, the number of molds used can be reduced with the process in accordance with the invention, whereby the use of one single mold is achievable.Type: GrantFiled: October 15, 1996Date of Patent: August 4, 1998Assignee: Ytong AktiengesellschaftInventors: Dieter Hums, Klaus F. Lippe
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Patent number: 5785913Abstract: A method of magnetically fabricating a particle filled polymer having improved mechanical, electrical, or thermal surface characteristics. Finely divided ferrite particles are first mixed into a hardenable, liquid polymeric material. Next, the particles are magnetically oriented within the material along a selected pattern characterized by a gradient of increasing particle density toward a surface of the material. The polymeric material is then cured into a hardened state in order to affix the pattern of particles therein. The particles may be coated with a hardening material, such as diamond, and attracted to the surface of the material in order to impart desired wear and erosion resistance to the resulting composite. Alternatively, the particles may be coated with a electrically or thermally conducting material, such as silver, and magnetically pulled into intimate contact with one another to impart a high level of electrical or thermal conductivity to the resulting composite.Type: GrantFiled: May 30, 1996Date of Patent: July 28, 1998Assignee: Westinghouse Electric CorporationInventors: William G. Clark, Jr., William A. Byers
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Patent number: 5779954Abstract: Process for manufacturing a hollow body including a plastic, in which at least one polyalkyleneimine is added to the plastic.Type: GrantFiled: March 13, 1996Date of Patent: July 14, 1998Assignee: Solvay (Societe Anonyme)Inventors: Anne Tinant, Roger Houba
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Patent number: 5772949Abstract: A thermally expandable wax composition and its use in polymer-based actuators is disclosed and claimed. The compositions are wax-based and include conductive filler as well as a viscosity modifier to stabilize the composition against segregation. Optionally included are thermoxidative stabilizers.Type: GrantFiled: August 7, 1997Date of Patent: June 30, 1998Assignee: Hoechst Celanese Corp.Inventors: M. Ishaq Haider, James E. Kuder, Barbara J. Long, Joseph D. Menczel, James B. Stamatoff, Michael Bayer
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Patent number: 5762847Abstract: An improved optical cable having at least one light waveguide having a coating and other component parts in the form of protective sheaths of plastic material as well as potentially tensile elements and filling compounds. The improved cable being recyclable, since the other component parts contain only polyolefins and small amounts of glass or inorganic fillers, so that the cable can easily be recycled into pellets having the inorganic fillers and glass acting as reinforcing elements.Type: GrantFiled: January 5, 1996Date of Patent: June 9, 1998Assignee: Siemens AktiengesellschaftInventors: Rainer Kamps, Walter Pfandl, Frederic Zapf, Reiner Schneider
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Patent number: 5728337Abstract: Each of two screw bodies includes a feed screw and a kneading screw. The feed screw is formed of a wide-flight 1-lobe intermeshing screw designed so that the ratio W.sub.0 /D of the flight width W.sub.0 thereof to the screw diameter D ranges from 0.2 to 0.4. The kneading screw includes a plurality of double tipped kneading discs designed so that the ratio W/D of the width W thereof in the axial direction of the screw bodies to the screw diameter D ranges from 0.3 to 1.0, and displaced from one another in the circumferential direction of the kneading screw, the angle by which any two adjacent kneading discs being displaced range such that at least a backflow of an extrusion material can be prevented.Type: GrantFiled: July 18, 1996Date of Patent: March 17, 1998Assignee: Toshiba Machine Co., Ltd.Inventors: Tatsuya Yoshikawa, Akiyoshi Kobayashi
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Patent number: 5728406Abstract: An apparatus are described for extruding a soft, low density elastomeric thermoplastic foam. A single screw extruder having a very large screw length to diameter ratio is provided to thoroughly mix the thermoplastic elastomer with a blowing agent. A thin, substantially taperless die is also provided to form extruded profiles. By using such an apparatus, a variety of complex-shaped extruded profiles may be easily produced.Type: GrantFiled: December 20, 1996Date of Patent: March 17, 1998Assignee: Amesbury Group, Inc.Inventors: Louis Halberstadt, Peter E. Mertinooke, Joseph V. Perry, Dan C. Muessel
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Patent number: 5716413Abstract: This invention provides molded, biodegradable porous polymeric implant materials having a pore size distribution throughout the material which is substantially uniform. These materials can be molded into implants of any desired size and shape without loss of uniformity of pore size distribution. The implants are useful as biodegradable scaffolds for cell growth in healing of tissue defects. When manufactured to have an aspect ratio greater than about 3, the implants can be further hand-shaped to fit the defect into which they are placed and the desired shape for the regrown tissue.Type: GrantFiled: October 11, 1995Date of Patent: February 10, 1998Assignee: OsteoBiologics, Inc.Inventors: Mary Ann Walter, Neil C. Leatherbury, Mark Q. Niederauer
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Patent number: 5716661Abstract: The present invention provides an article including a curable resin and a filler associated with the resin. The incorporation of fillers into the casting materials of the present invention adds substantially to the strength of the cured casting material as well as to the handling properties of the uncured casting tape or bandage. The incorporation of fillers into the casting materials of the present invention also imparts air and vapor porosity to the cured casting materials. If desired articles of the present invention may also incorporate fibers (either individually, bundled, or in the form of a light-weight scrim) to provide increased cohesiveness to the uncured article. Extremely moldable casting tapes are also provided which comprise a highly-filled composite material coated on a light-weight scrim. The casting tapes of this embodiment handle like traditional plaster of Paris casts yet cure to a weight-bearing cast in less than one hour.Type: GrantFiled: June 5, 1995Date of Patent: February 10, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Mathew T. Scholz, Jason L. Edgar, Andrew J. Callinan, Dean A. Ersfeld, Worku A. Mindaye, Andrew J. Mahler, Jr.
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Patent number: 5716702Abstract: Disclosed herein is a packaging system comprising predispersed chemicals in preweighed quantities embedded in multiple separated compartments of a masterbatch.Type: GrantFiled: September 25, 1995Date of Patent: February 10, 1998Assignee: Rhein Chemie CorporationInventors: Walter H. Schuette, Anders H. Johansson
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Patent number: 5711904Abstract: A method of making silica loaded elastomer masterbatches or compounded productive elastomer stocks with or without the simultaneous extrusion of component profiles is provided. A twin-screw extruder is used to mix the elastomeric stock in multiple mixing zones at controlled temperatures in which a concurrent chemical reaction takes place between the silica coupler, the silica, and/or the diene based elastomer. Silica, elastomer, silica coupler, and other ingredients are fed into the twin screw extruder continuously through precise loss-in-weight or volumetric feeders. Chemical reactions(s) in the elastomer/silica based composition take place within the twin-screw extruder while the composition is mixing. The product is forced through a profile die mounted at the exit of the extruder and formed into the shape of the desired component. The maximum rate of mixing tends to be a function of the heat transfer efficiency, the conveying capacity of the screws, and the mechanical strength of the extruder.Type: GrantFiled: September 5, 1995Date of Patent: January 27, 1998Assignee: The Goodyear Tire & Rubber CompanyInventors: Vetkav Rajagopalan Eswaran, Christopher Kiehl, Fredrick Lewis Magnus, Pawan Kumar Handa
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Patent number: 5707569Abstract: Polar-side-group-containing extrusion adjuvants, such as ethylene diamine tetraacetic acid or ionomer, that counteract the deleterious effect of certain additives such as zinc stearate, used in polyolefins on the performance of fluoropolymer processing aids in polyolefins are taught.Type: GrantFiled: February 15, 1994Date of Patent: January 13, 1998Assignee: E. I. Du Pont de Nemours and CompanyInventors: Donnan Edwin Priester, Charles Winfield Stewart
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Patent number: 5705120Abstract: The graphite fiber-reinforced fluororesin composite including 99 to 40 parts by weight of a fluororesin, e.g. polytetrafluoroethylene, and 1 to 60 parts by weight of a graphite fiber. The graphite fiber has a specific surface area of 0.6 to 25 m.sup.2 /g and, as determined by X-ray photoelectron spectroscopic analysis, (1) a surface atomic oxygen/atomic carbon ratio of 0.10 to 0.20, (2) a surface atomic halogen/atomic carbon ratio of 0.05 to 1.8 or (3) a surface atomic oxygen/atomic carbon ratio of 0.10 to 0.20 and a surface atomic halogen/atomic carbon ratio of 0.05 to 1.8. Such fiber may, for example, be obtained by subjecting a graphite fiber to oxidizing treatment, halogenating treatment, or oxidizing and halogenating treatments. The graphite fiber imparts high mechanical strength characteristics and wear resistance to the composite.Type: GrantFiled: December 29, 1995Date of Patent: January 6, 1998Assignee: Osaka Gas Company, LimitedInventors: Takuya Ueno, Masayuki Inamori
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Patent number: 5701577Abstract: A forming process utilizing liquid absorption by a liquid-absorbing substance, includes preparing a liquid mixture containing at least one substance dispersible or soluble in the liquid mixture, a liquid capable of dispersing or dissolving the at least one substance, and a liquid-absorbing substance capable of absorbing the liquid by itself or when modified, and placing the liquid mixture in a mold and allowing the substance to absorb the liquid to obtain a formed material. In the forming process, the moldability is not influenced by the particle shape, particle diameter or particle size distribution of the at least one substance dispersible or soluble in the liquid, and the formed material obtained by said process has no internal strain and is homogeneous and elastic.Type: GrantFiled: June 5, 1995Date of Patent: December 23, 1997Assignee: NGK Insulators, Ltd.Inventor: Shinzo Hayashi
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Patent number: 5700410Abstract: A method of producing a wax matrix for controlled release of a pharmaceutically active ingredient is provided. The method includes the steps of feeding a wax and a pharmaceutically active ingredient into a multi-screw extruder and thoroughly mixing the wax with the pharmaceutically active ingredient using the multi-screw extruder to form a wax matrix. The wax matrix thus produced provides a controlled release of the active ingredient.Type: GrantFiled: June 7, 1995Date of Patent: December 23, 1997Assignee: Nippon Shinyaku Co., Ltd.Inventors: Kouichi Nakamichi, Shougo Izumi, Hiroyuki Yasuura
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Patent number: 5700414Abstract: The present invention relates to a heat-insulating panel formed of curly contracted pieces of tapes, for example thermally contracted pieces of magnetic tapes, and a method of manufacturing such a panel. In particular, the present invention concerns a heat-insulating panel which also serves as a concrete form. The heat-insulating panel has excellent strength characteristics such, as bending strength and bending rigidity, and dimensional stability, as well as characteristics of sound absorption, heat-insulation, electrostatic shielding and electromagnetic wave absorption, and is usable for a concrete form when placing concrete during the construction of a building formed of reinforced concrete or steelframe reinforced concrete. The present invention relates also to a method of manufacturing the panel.Type: GrantFiled: November 3, 1995Date of Patent: December 23, 1997Assignees: Nihon Cement Co. Ltd., Fuji Kasei Kogyo Kabushiki KaishaInventors: Yuukou Ishikawa, Noboru Nishimoto, Michio Ootani, Tooru Tanibe, Kazushige Suzuki, Kanesuke Kasahara
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Patent number: 5698150Abstract: A method for manufacturing hemispherical shells for covering a golf ball core, which comprises: mixing a quantity of balata sufficient to form a desired number of hemispherical shells configured and adapted for covering golf ball cores; transferring a predetermined quantity of the mixed balata to an extruder and extruding a plurality of strands of the balata at a temperature of between about 140.degree. and 280.degree. F.; cutting the strands into pellets of a desired size and injection molding the pellets into a hemispherical shell.Type: GrantFiled: June 7, 1995Date of Patent: December 16, 1997Assignee: Acushnet CompanyInventors: Samuel A. Pasqua, Jr., Robert N. Lammi, Lawrence E. Stanton
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Patent number: 5693276Abstract: A method for extruding synthetic welding material using a welding device for synthetic welding material for the purpose of producing welding seams is characterized by the following features:a) A plastic wire is drawn by a feed device into the welding device (11, 12, 38) for synthetic welding material;b) The plastic wire is fed by the feed device (11, 12, 38) with a specific advancement into a cutting device (26, 36) of the welding device for synthetic welding material;c) In the cutting device (26, 36), pieces are cut consecutively from the plastic wire while forming essentially even cutting surfaces;d) The advancement of the plastic wire and the cutting frequency of the cutting device (26, 36) are in such a ratio to each other that the cut-off length of the pieces is in the same magnitude as the mean diameter of the plastic wire;e) The pieces are then heated until they are plastified;f) The plastified synthetic material is ejected as synthetic welding material from the welding device for synthetic welding matType: GrantFiled: October 20, 1995Date of Patent: December 2, 1997Assignee: Wegener GmbHInventor: Reinhard Weissfloch
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Patent number: 5691424Abstract: A preparation process of heat-resistant molded articles of a lactic acid-based polymer comprising mixing the lactic acid-based polymer and poly-.epsilon.-caprolactone so as to obtain a L-lactic acid ratio of 75% by weight or more, adding to the polymer mixture a crystalline inorganic powder containing 50% by weight or more of SiO.sub.2, melt-kneading the resultant composition, filling the same into a mold which is set at 85.degree..about.125.degree. C. and forming a shape while promoting crystallization. The molded articles have excellent heat resistance and impact strength, are suitably used for food trays and beverage cups, and can be degraded, in the case of waste, into nontoxic water and carbon dioxide like natural products within a relatively short period in the natural environment.Type: GrantFiled: May 25, 1995Date of Patent: November 25, 1997Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Kazuhiko Suzuki, Takayuki Watanabe, Yasuhiro Kitahara, Masanobu Ajioka
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Patent number: 5683632Abstract: A method and apparatus are provided which can automatically and securely supply a molding machine with natural resin pellets and masterbatch pellets at a predetermined mixture ratio, and which is excellent in performance and costs. A natural resin feeder and a masterbatch feeder are connected to a chute of the molding machine via respective tubes. The amount of the natural resin pellets and the amount of the masterbatch pellets which are air-transferred through the respective tubes are controlled such that they are transferred in accordance with the predetermined mixture ratio. The chute and the raw material supply port of the molding machine is connected by a pipe whose cross-sectional area at the upper portion is substantially equal to or smaller than that at the lower portion thereof. The natural resin feeder and the masterbatch feeder are intermittently operated in accordance with signals from an upper limit level meter and a lower limit level meter provided on the pipe.Type: GrantFiled: September 29, 1995Date of Patent: November 4, 1997Assignee: Toyo Ink Manufacturing Co., Ltd.Inventors: Hideo Shimizu, Hozumi Tanaka
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Patent number: 5670106Abstract: An extruding apparatus for manufacturing organically based polymer/thermoplastic products. A rotational screw cooking extruder includes an extrusion chamber having a receiving port for receiving extrudate ingredients thereinto. An ejection port is formed as part of the chamber, and a rotatable screw member is disposed within the chamber for compressing extrudate ingredients within the chamber and advancing the ingredients toward and through the ejection port. A channeling device is provided for holding a plurality of extrudate ingredients and channeling them separately and simultaneously into the cooking extruder to maintain the ingredients in a desired orientation with respect to each other at the time of their insertion into the extruder.Type: GrantFiled: April 4, 1995Date of Patent: September 23, 1997Assignee: Merizo Enterprises L.L.C.Inventor: Rodney Swank
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Patent number: 5660783Abstract: In order to operate the closing means of a double plate injection moulding machine including a fixed and a movable mould plate, the closing means comprising at least one pump (22), at least one high speed cylinder for a high speed stroke and at least one closing cylinder (10) for a closing stroke with a nominal closing force, whereby the closing cylinder (10) includes a double action piston (7) in which both piston faces (13, 14) are the same size and which divides the interior of the closing cylinder (6) into two cylinder sections (8, 9) which are hydraulically connectable via hydraulic lines (21, 22) and a valve (26), the following method is carried out: during the high speed closing operation using the high speed cylinder (3), both sides of the piston (7) of the closing cylinder (10) are pressurized with an equal, high pressure which is as high as or higher than that required to obtain the required nominal closing force, whereby on moving the piston (7) of the closing cylinder (10) in the closing directionType: GrantFiled: February 16, 1995Date of Patent: August 26, 1997Assignee: Engel Maschinenbau Gesellschaft M.B.H.Inventors: Otto Urbanek, Heinz Leonhartsberger, Franz Dirneder
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Patent number: 5660770Abstract: A process which includes comminuting a first thermoplastic material, e.g. polypropylene, reinforced with short glass fiber (10-400 .mu.m). 100 parts by weight of the comminuted material are mixed with 11-43 parts by weight of chips of a second thermoplastic material, which is reinforced with long glass fiber (about 10-20 mm). The melts of the two thermoplastic materials should be mutually mixable. The mixture is subjected to thermoplastic forming.Type: GrantFiled: March 8, 1995Date of Patent: August 26, 1997Assignee: Hoechst AktiengesellschaftInventors: Michael Wernicke, Detlef Skaletz
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Patent number: 5656069Abstract: A filter material from active carbon compacts is prepared by the following steps:(a) mixing active carbon powder with polyvinyl alcohol powder in the ratio of 9:1 to 3:1,(b) mixing the powder from step (a) with distilled water or a mixture of distilled water and ethyl alcohol,(c) shaping tablets and similar articles in a mold under pressure, and(d) successively heating the tablets at1) 40.degree. to 80.degree. C. for 3 to 6 hours,2) 80.degree. to 120.degree. C. for 10 to 14 hours.A filter material according to the invention for the selective separation of organic material from an organic phase consists of active carbon compacts thus prepared and is used for the selective separation of organic and inorganic phases.Type: GrantFiled: October 12, 1994Date of Patent: August 12, 1997Assignee: MST Micro-Sensor Technologie GmbHInventors: Elena J. Nikolskaja, Natalia W. Maltzeva, Elena W. Loseva, Evgenia B. Koroljeva