Induction Heating Patents (Class 264/472)
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Patent number: 8128857Abstract: A method of shortening cycle time required to compression mold shingle or tile is provided, wherein carrier plates are comprised of a surface material and a base, and receive a thermoplastic material, thereon. The roofing material is applied to the carrier plate and the carrier plate is subjected to induction heating, by which its surface material has its temperature raised, without substantially raising the temperature of the carrier plate base, such that the thermoplastic material applied thereto is kept heated in the compression mold. Cooling of the thermoplastic material is by heat transfer from the carrier plate surface material to the carrier plate base, and with both materials having good heat conduction capability. The carrier plate surface material has a high receptivity to being heated by induction heating relative the carrier plate base. The carrier plates are serially delivered through the process, to the compression mold.Type: GrantFiled: December 11, 2009Date of Patent: March 6, 2012Assignee: CertainTeed CorporationInventors: Thomas Kevin MacKinnon, David Nelson, Nolan Loy Son, Trevor Reeve
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Patent number: 8007709Abstract: A system for processing plastic feed material includes a machine having a barrel and a screw that rotates in a repetitive cycle in the barrel. An induction winding encircles and extends along an outer surface of the barrel. A control system includes a controller that determines a duty cycle referenced to a length of the machine cycle in response to an error between a desired barrel temperature and a current barrel temperature. The controller electrically connects the power supply to the induction winding at least once during each cycle for a period whose length corresponds to the duty cycle.Type: GrantFiled: August 20, 2008Date of Patent: August 30, 2011Assignee: Xaloy, IncorporatedInventors: Bruce F. Taylor, Robert Kadykowski
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Patent number: 7957830Abstract: A customer transmits their 3D CAD file for a part to be total profile machined. Computer analysis of the transmitted CAD file produces CNC machining instructions, which are transmitted back to an address defined by the customer. The customer can then use the transmitted CNC machining instructions to total profile machine their own part using their own CNC mill at the location where the part is likely needed. The transmitted instructions include not only the tool paths for CNC machining of the total profile of the part, but also for additional features formed into the encircling portion of a material block from which the part is to be total profile machined. For instance, the CNC machining instructions transmitted back to the customer can define a registration recess and/or channels or undercuts for fluid support material on an A-side of a material block. After the A-side of the block is machined, the customer adds and solidifies fluid support material into the machined recess.Type: GrantFiled: June 10, 2008Date of Patent: June 7, 2011Assignee: Proto Labs, Inc.Inventors: Lawrence J. Lukis, Yuri A. Dreizin, Gregory M. Bloom
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Patent number: 7910045Abstract: The invention relates to an arrangement for inductively heating an electrical conductor after the extrusion head in a process of manufacturing electrical cables (8) having insulation layer on the electrical conductor. The arrangement comprises a first distinctive part having induction means (5), and a second distinctive part having guide means (4) and provided in a splice box (3) for directing the magnetic field created with the induction means (5) to protect external parts from heating.Type: GrantFiled: June 2, 2005Date of Patent: March 22, 2011Assignee: Maillefer S.A.Inventor: Pekka Huotari
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Patent number: 7718935Abstract: Apparatus and method for inductive heating of a material located in a channel. In one embodiment, the heating assembly comprises an interior coil, an exterior sheath inductively coupled to the coil, a dielectric material disposed between the coil and sheath, and a conductor for supplying a signal to the coil to generate the magnetic flux for inductive heating of the sheath. The heating assembly is disposed in the material in the channel, and the magnetic flux generated by the coil may also inductively couple to the material in the channel. The material may be heated from a nonflowable to a flowable state, such as heating a metal or polymer plug formed in a melt channel of a molding apparatus.Type: GrantFiled: August 16, 2006Date of Patent: May 18, 2010Assignee: iTherm Technologies, LPInventors: Stefan von Buren, Kyle B. Clark
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Patent number: 7569173Abstract: A method for processing thermoplastics in a shaping device, whereby before and/or during its passage in the shaping device the thermoplastic is submitted to a static electrical field.Type: GrantFiled: February 28, 2005Date of Patent: August 4, 2009Assignee: International Brain System S.A.Inventor: Joël Soulier
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Patent number: 7485685Abstract: Plastics pipes comprise polyolefins which can be prepared by means of a fluorine-modified chromium catalyst and are used for transporting gases and liquids.Type: GrantFiled: October 19, 2006Date of Patent: February 3, 2009Assignee: Basell Polyolefine GmbHInventors: Shahram Mihan, Heinz Vogt, Ilka Beuermann
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Patent number: 7393205Abstract: The invention relates to a device for heating up extrusion dies prior to their installation in an extruder, whereby the dies are heated up to a prescribed temperature and kept at this temperature. The device is characterized in that it comprises a gas-tight and thermally insulated oven housing (50) that has at least one charging and discharging opening (70) with an oven cover (40) and, inside the oven housing, there is an impact nozzle field (20) into which a die (90) can be placed, and in that the device (10) is provided with a heating means (100) that heats up a fluid that flows through the openings (110) of the impact nozzle field (20). The invention also relates to a method for heating up extrusion dies prior to their installation in an extruder.Type: GrantFiled: November 4, 2005Date of Patent: July 1, 2008Inventor: Rolf-Josef Schwartz
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Publication number: 20080102721Abstract: A puncture and abrasion resistant, air and water impervious laminated fabric is provided. The laminated fabric includes a woven fabric base layer having warp and weft yarns, with at least 50 percent of the fibers in the warp yarns being formed of high performance material. A first thermoplastic film is bonded by heat and pressure to at least one of the sides of the fabric base layer. The first thermoplastic film is formed of ethylene vinyl acetate. A second thermoplastic film is bonded by heat and pressure to the first thermoplastic film on at least one of sides of the fabric. The second thermoplastic film is formed from either high density polyethylene or low density polyethylene.Type: ApplicationFiled: October 31, 2006Publication date: May 1, 2008Inventors: John E. Holland, Connie W. Holland
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Patent number: 7169857Abstract: Fluoroelastomers are combined with chemical agents in the presence of supercritical carbon dioxide by swelling the fluoroelastomer with the carbon dioxide, and impregnating the swollen fluorelastomer with the chemical agent. The process can be conducted at relatively low temperatures and pressures such that degradation of the fluoroelastomer or the chemical agent is avoided. The chemical agent is preferably a curing agent which includes functional groups that interact with functional groups on the fluoroelastomer to create an association therebetween. The process is enhanced by pre-dissolving the chemical agent in a solvent which does not solubilize the fluoroelastomer to a great extent, but which is itself soluble in supercritical carbon dioxide. In addition, during combining, mechanical mastication is performed to create a free flowing powder.Type: GrantFiled: October 3, 2003Date of Patent: January 30, 2007Assignees: Virginia Commonwealth University, Daiken America, Inc.Inventors: Mark A. McHugh, Dan Li, Michael Oka
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Patent number: 7087660Abstract: This invention relates to a process of preparation of components and articles of manufacture containing at least one of such components, such as tires, and the resulting prepared components and fabricated articles, by use of directed high frequency energy internally heated silica-rich rubber compositions which contain sulfur curative and a significant content of high softening point polymer, namely a polymer and/or elastomer having a melting point (Tm) and/or high glass transition temperature (Tg) above 0° C., and particularly above 30° C., and which contains a minimal, if any, carbon black reinforcement. Such directed high frequency energy heating is provided, individually, by directed radio frequency (electromagnetic) radiation and/or by directed microwave radiation.Type: GrantFiled: July 29, 2003Date of Patent: August 8, 2006Assignee: The Goodyear Tire & Rubber CompanyInventors: Thomas Robert Maier, Bruce Raymond Hahn, Brian John Doucet, Thierry Florent Edme Materne
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Patent number: 6960633Abstract: Fluoropolymer materials containing tetrafluoroethylene monomers, such as PTFE, are significantly swollen by supercritical carbon dioxide at high temperatures and pressures. The swollen fluoropolymer is processable by molding, extrusion, and other techniques. In addition, the fluoropolymer may be sintered at significantly lower temperatures compared to a nonswollen fluoropolymer material. The melting temperature of fluorinated polymers containing tetrafluoroethylene and triflouroethylene monomers which are swollen with supercritical carbon dioxide is significantly reduced, thereby permitting manufacturing operations such as extruding and molding to be performed at lower temperatures and with reduced risk of decomposition.Type: GrantFiled: October 11, 2002Date of Patent: November 1, 2005Assignees: Virginia Commonwealth University, Daikin Institute of Advanced Chemistry and Technology (Dai-Act)Inventors: Kenneth Wynne, Suresh Shenoy, Sadashige Irie, Takako Ohsaka, Younosuke Ohsaka
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Patent number: 6911162Abstract: A conductive silicon nitride composite sintered body having an average grain size of 200 nm or less and whose relative roughness (Ra) after electric discharge machining is 0.6 ?m or less can be obtained by grinding/mixing a silicon nitride powder and a metal powder together until the average particle size of the silicon nitride powder becomes 30 to 60 nm, and subsequently by molding and sintering. With the contexture that is characteristic of the present invention, it is possible to obtain a conductive silicon nitride composite sintered body having electric conductive particles of 5 to 60 volume percent that is capable of electric discharge machining.Type: GrantFiled: June 17, 2002Date of Patent: June 28, 2005Assignee: Sumitomo Electric Industries, Ltd.Inventor: Masashi Yoshimura
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Publication number: 20040225269Abstract: Environmentally degradable molded or extruded articles comprising a blend of polyhydroxyalkanoate copolymer and an environmentally degradable thermoplastic polymer or copolymer are disclosed. Such compositions provide annealing cycle times to form molded or extruded articles that are less than annealing cycle times to form a molded or extruded article lacking the environmentally degradable thermoplastic polymer or copolymer.Type: ApplicationFiled: May 8, 2003Publication date: November 11, 2004Applicant: The Procter & Gamble CompanyInventors: Jean Jiangun Zhao, Isao Noda, Gary Wayne Gilbertson, Drew Clifton McAvoy, Brian Francis Gray, David Harry Melik
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Patent number: 6620214Abstract: Methods for making ceramic aggregate particles comprising forming a plurality of ceramic aggregate precursor particles from a composition by forcing the composition through at least one orifice in a substrate, at least partially curing the ceramic aggregate precursor particles, and heating the ceramic aggregate precursor particles to provide ceramic aggregate particles wherein solid particulates are bonded together by ceramic binder.Type: GrantFiled: October 5, 2001Date of Patent: September 16, 2003Assignee: 3M Innovative Properties CompanyInventors: James L. McArdle, Jeffrey W. Nelson, Scott R. Culler, John T. Wallace
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Patent number: 6579601Abstract: Conformable multilayer films having alternating layers of a stiff polymeric material and a flexible polymeric material are described.Type: GrantFiled: February 7, 2001Date of Patent: June 17, 2003Assignee: 3M Innovative Properties CompanyInventors: Richard A. Kollaja, David D. Nguyen, Ronald S. Steelman, Buren R. Ree, Steven D. Solomonson, Philip D. Radovanovic
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Patent number: 6287505Abstract: Self-tuning materials which can efficiently emit or receive radio waves in spite of being simple in their construction and small in their dimension, and are applied to patch antenna, wave directors or the like. Metallic chips containing two or more kinds of ingredients which are distributed in a layered, net-like or needle-shaped configuration, and an organic or inorganic bonding material which is small in dissipation of electric power under radio waves of high frequencies are mixed with each other, and are pressurized under a high pressure while being highly electrified in the direction perpendicular to the pressurizing direction to mold the metallic chips and the bonding material in a plate-shaped configuration while being heated.Type: GrantFiled: July 6, 1999Date of Patent: September 11, 2001Assignee: Suisaku LimitedInventor: Etsuko Kaitani
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Publication number: 20010002610Abstract: A method for molding an end of a long resin molded article is disclosed. The long resin molded article is obtained by extrusion molding and having a design surface and an attachment surface extended in a longitudinal direction of the long resin molded article, and the attachment surface is attached to other parts. An end portion of the long resin molded article is heated so as to soften the end portion of the long resin molded article. The design surface of the heated end portion is pressed so as to stretch resin on a side of the design surface thereby forming an inclined surface on the end portion, whereby the end portion is inclined from the design surface at the end portion to said attachment surface at the end portion along said inclined surface. And the attachment surface of the heated end portion is pressed so as to form a cavity on the attachment surface and stretch resin on a side of the attachment surface.Type: ApplicationFiled: January 25, 2001Publication date: June 7, 2001Applicant: Toyoda Gosei Co., Ltd.Inventors: Yasunobu Teramoto, Shinichi Goto, Tatsuo Ito, Hiroshi Mukai, Hiroshi Iwasaki, Masahiro Nakatani
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Patent number: 5939012Abstract: A carbonaceous article is made by baking paste under continuously applied high pressure. The paste is extruded as it is baked to form the article, and the article may be further machined after baking. A force opposing extrusion is applied to the article to allow high pressures to be provided to the paste. The location of the baking zone both longitudinally and peripherally is carefully controlled to preclude over or under baking. Longitudinal control of the baking zone is effected by measuring the force required to extrude baked paste, and peripheral control is effected by measuring the extent of the baking at several peripheral locations and controlling the baking current at these locations. The article may be an electrode for supply to an electric arc furnace immediately after baking or to a furnace remote from the baking station.Type: GrantFiled: December 12, 1997Date of Patent: August 17, 1999Assignee: Globe Metallurgical, Inc.Inventor: Earl K. Stanley
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Patent number: 5705119Abstract: Process and apparatus for spinning polymer filaments permits the obtaining of skin-core filament structure by feeding a polymer composition to a spinnerette at a flow rate sufficient to obtain a spinning speed of about 10 to 200 meters per minute through the spinnerette; heating the polymer composition at a location at or adjacent to the spinnerette so as to heat the polymer composition to a sufficient temperature to obtain a skin-core filament structure upon quenching in an oxidative atmosphere; extruding the heated polymer composition through the spinnerette at a spinning speed of about 10 to 200 meters per minute to form molten filaments; and quenching the molten filaments in an oxidative atmosphere so as to effect oxidative chain scission degradation of at least a surface of the molten filaments to obtain filaments having a skin-core structure.Type: GrantFiled: February 7, 1996Date of Patent: January 6, 1998Assignee: Hercules IncorporatedInventors: Kunihiko Takeuchi, Rakesh K. Gupta, Shiv Sibal, Richard J. Coffin, Walter J. Freeman
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Patent number: 5639518Abstract: A raw material formed by a mixture of, for example, soybean protein and water, is extruded by an extruder. Then, high-frequency electroconductive heating is performed by placing the material between a pair of electrodes and applying a voltage between the electrodes. As a result, a biodegradable molded article is obtained. In this method, biodegradable molded articles having a uniform structure are manufactured in a short period of time without increasing the cost of equipment or adversely affecting the working environment.Type: GrantFiled: July 11, 1995Date of Patent: June 17, 1997Assignee: Nissei Kabushiki KaishaInventors: Sadamasa Ando, Taizo Karasawa, Akio Ozasa, Takayuki Kurisaka, Yoshiyuki Otani