With Workpiece Support Patents (Class 219/647)
  • Patent number: 6657170
    Abstract: An induction heatable body (22) that quickly heats to a desired temperature, retains heat long enough to be used in almost any application, and develops no “hot spots” even when heated by a heating source having an uneven magnetic field distribution. The induction-heatable body (22) achieves the foregoing while remaining relatively lightweight, inexpensive and easy to manufacture. The induction-heatable body (22) includes a plurality of induction-heatable layers (32a, b, c) each sandwiched between alternating layers of heat retentive material (34a, b, c). The induction-heatable layers (32a, b, c) consist of sheets of graphite material that can be inductively heated at magnetic field frequencies between 20 and 50 kHz. The heat-retentive layers (34a, b, c) consist of solid-to-solid phase change material such as radiation cross-linked polyethylene.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: December 2, 2003
    Assignee: Thermal Solutions, Inc.
    Inventor: Brian L. Clothier
  • Publication number: 20030209540
    Abstract: An induction furnace, according to one embodiment of the invention, includes an induction heating system and a chamber that comprises a quartz cylinder, a top cover for sealing the top end of the cylinder, and a bottom cover for sealing the bottom end of the cylinder. The induction heating system includes a power supply and a coil. The coil surrounds the chamber. Contained within the chamber is a susceptor that is susceptable to induction heating. Also contained in the chamber is a thermal insulator that is disposed between the susceptor and the inner walls of the chamber. The insulator includes a fused quartz container in which the susceptor and the workpiece are contained.
    Type: Application
    Filed: May 9, 2003
    Publication date: November 13, 2003
    Inventors: Girish Dahake, Dale Wilcox, Steve Skewes
  • Patent number: 6582659
    Abstract: A clinical test apparatus includes a reaction table (1) for placing a test piece thereon for reaction of the test piece with an analyte at a predetermined temperature to perform analysis. The clinical test apparatus includes a primary coil (3) fixed, as molded and sealed in resin, on a base facing the reverse surface of the reaction table (1) and supplied with alternating power, a secondary coil (4) mounted, as molded and sealed in resin, on the reverse surface of the reaction table (1) in facing relation to the primary coil (3) for inducing an electromotive force due to the alternating power supplied to the primary coil and a heater (5) built in the reaction table (1) for generating heat due to the electromotive force induced in the secondary coil.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: June 24, 2003
    Assignee: Kyoto Daiichi Kagaku Co., Ltd.
    Inventor: Yasuhito Murata
  • Publication number: 20030106890
    Abstract: A die liner for use in a die having a die body wherein the die body is configured to form a workpiece. The die liner is a discrete structure that is configured to be used in conjunction with the die body. The die liner defines a forming surface for forming the workpiece and is configured to have at least one characteristic that is different than a corresponding characteristic of the die body such that the die liner increases the durability of the die.
    Type: Application
    Filed: December 6, 2001
    Publication date: June 12, 2003
    Inventors: Marc R. Matsen, Ronald W. Brown, John R. Fischer, Brad L. Kirkwood
  • Publication number: 20030057202
    Abstract: An adaptor for combing a shrink preset tool presetting machine with an induction heating unit. The adaptor is disposed at the bottom of the induction slide member of the induction heating unit and is fastened around the outer periphery of the preset spindle device of the shrink set tool presetting machine. The combined shrink set tool presetter/induction heating machine assembly is also provided with a novel fine adjustment mechanism.
    Type: Application
    Filed: September 23, 2002
    Publication date: March 27, 2003
    Inventor: Leslie D. Maxson
  • Patent number: 6523598
    Abstract: The vacuum induction melting system is designed to be operated in a continuous or semi-continuous manner for extended periods of time for increased efficiency, and makes it possible to easily and quickly remove the induction furnace from the melt chamber when it becomes necessary to replace and rebuild the furnace. The melting system includes a melt chamber which forms an airtight enclosure, with an induction furnace located within the melt chamber. A charging chamber is communicatively connected to the melt chamber adjacent its upper end. The charging chamber includes a door providing access to the interior of the charging chamber so that a charge of raw materials can be placed therein. An isolation valve is located between the melt chamber and the charging chamber and is movable between open and closed positions.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: February 25, 2003
    Assignee: ATI Properties, Inc.
    Inventor: Sterry A. Shaffer
  • Patent number: 6512211
    Abstract: A pouch is provided for use in transporting packaged hot foodstuff such as pizza. The pouch has front and back walls, and a peripheral wall attached to the front and back walls. An induction heating element is retained in a location structure attached to the back wall for induction heating with the pouch positioned on a surface such that the wall carrying the heating element is on the surface. The element is then positioned relative to the surface for efficient induction heating to create a source of heat while the foodstuff is transported.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: January 28, 2003
    Assignees: Covertex Corporation, Thermal Solutions Inc.
    Inventors: Edward A. Lockhart, Joseph S. Moyer
  • Publication number: 20030010775
    Abstract: The present invention relates to methods and apparatuses for heat treatment of semiconductor films upon thermally susceptible non-conducting substrates at a minimum thermal budget are required, and more particularly, to a polycrystalline silicon thin-film transistors (poly-Si TFTs) and PN diodes on glass substrates for various applications of liquid crystal displays (LCDs), organic light emitting diodes (OLEDs), and solar cells. According to the methods and apparatus of the present invention, the semiconductor films can be heat-treated without damaging the thermally susceptible substrates; e.g., crystallization of amorphous silicon films at the minimum thermal budget acceptable for the use of glass, enhancing kinetics of dopant activation at the minimum thermal budget acceptable for the use of glass.
    Type: Application
    Filed: June 21, 2001
    Publication date: January 16, 2003
    Inventor: Hyoung June Kim
  • Patent number: 6441353
    Abstract: The invention relates to roller unit consisting of an inductively heated roller, a drive motor, an inductor and a frequency converter. According to the invention not only the converter but also the temperature regulator for the induction heater and monitoring devices for the roller, heater and/or motor are integrated into the roller unit. The power electronics and the regulator are mounted on a common cooling unit which is cooled by a coolant which at the same time also cools the motor, the bearings and the inductor.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: August 27, 2002
    Assignee: D.I.E.N.E.S. Apparatebau GmbH
    Inventors: Wolfgang Gehrmann, Max Brossmer
  • Patent number: 6399929
    Abstract: A coil/capacitor combination useable as an induction furnace includes a reactive capacitor bank directly bolted to the coil and protected from coil fields by shields and heat sink plates. The coil includes a selectively openable switch for placing the coil assembly on and off of a moving strip. The switch is operated by deflecting coil turns within the natural resiliency of the turns themselves.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: June 4, 2002
    Assignee: Ajax Magnethermic Corporation
    Inventors: David J. Hanton, Maochang Cao, David W. Adair
  • Patent number: 6362461
    Abstract: A sealing device for sealing non-circular, in particular polygonal, for example tetragonal, hexagonal, octagonal or elliptical, container openings comprises one or a plurality of induction loops (11, 38, 41) for sealing purposes. Containers (2) comprise joined-on closure devices (3) with sealing discs (15) joined onto a sealing edge (14) of the container opening. The induction loops (11, 38, 41) are adapted to the shape of the sealing edge (14) and the spacing between the induction loop (11, 38, 41) and sealing edge (14) is constantly adjustable and selectable.
    Type: Grant
    Filed: November 27, 1999
    Date of Patent: March 26, 2002
    Assignee: Alfelder Kunststoffwerke Herm. Meyer GmbH
    Inventors: Heinz-Rudolf Wiening, Horst Trombach
  • Patent number: 6360810
    Abstract: A vacuum induction melting system includes a melt chamber which forms an airtight enclosure, with an induction furnace located within the melt chamber. A mold tunnel is connected to the melt chamber adjacent its lower end, with the mold tunnel including a pour opening which communicates with the melt chamber and through which molten metal poured from the furnace can enter the mold tunnel. A mold carriage is positioned within the mold tunnel for receiving and carrying one or more molds adapted for receiving molten metal. An isolation valve is located between the melt chamber and the mold tunnel for isolating the mold tunnel from the melt chamber to allow for removing the mold carriage from the mold tunnel for loading or unloading of molds thereon. A mold transport assembly is provided for moving the mold carriage from a pouring position within the mold tunnel to a loading position located outside of the mold tunnel.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: March 26, 2002
    Assignee: ATI Properties, Inc.
    Inventor: Sterry A. Shaffer
  • Patent number: 6303912
    Abstract: An induction heating appliance has magnetically active parts on the top and is otherwise completely encapsulated in an electrically insulating and heat conductive material. The electrical connection is by means of a plug. A number of such appliances may be supplied with power in the range 20 kHz-100 kHz via coaxial cables leading to a central power supply converter. The unit is intrinsically safe and can be either installed or free standing.
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: October 16, 2001
    Assignee: Aktiebolaget Electrolux
    Inventor: Christian Eskildsen
  • Patent number: 6271507
    Abstract: An apparatus and method is provided for conductively bonding at least two conductors together. An inductive coil generates a magnetic field when electrical current is run therethrough. A magnetic concentrator is disposed near the inductive coil and adjacent which the two conductors can be positioned for concentrating the magnetic field on the conductors. The concentrator is independent of the conductors. Pressure is applied to the conductors. The concentrator concentrates the magnetic field generated by the inductive coil on the conductors, thereby heating the conductors under pressure and electrically bonding the conductors together.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: August 7, 2001
    Assignee: Molex Incorporated
    Inventor: Michael S. Godwin
  • Patent number: 6232585
    Abstract: Temperature self-regulating food delivery systems are provided having a magnetic induction heater (32, 126) and an associated food container (76, 124) equipped with an essentially permanent ferromagnetic heating element (82, 100, 128). The heater (32, 126) and heating elements (82,100, 128) are designed so as to heat the element (82, 100, 128) to a user-selected regulation temperature when the elements (82, 100, 128) are coupled with the heater's magnetic field, and to maintain the temperature in the vicinity of the regulation temperature indefinitely temperature regulation is a heating achieved by periodically determining at least two parameters of the heaters resonant circuits related to the amplitude of the resonant current passing therethrough during heating and responsively altering the field strength of the magnetic field. Preferably, the value of the resonant circuit amplitude and the rate of change of the amplitude are determined.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: May 15, 2001
    Assignee: Thermal Solutions, Inc.
    Inventors: Brian L. Clothier, Amil J. Ablah
  • Patent number: 6177661
    Abstract: A wafer holding stage used during a semiconductor device fabricating process decreases the number of particles that accumulate on a wafer. The wafer holding stage includes a stage having an upper surface for holding a wafer and a heating element disposed inside the stage for raising temperatures of the upper surface to a holding temperature above an ambient temperature. The heating element may be a heating wire for producing heat when supplied with a electric current or a heat exchange tube for carrying a heated fluid. The wafer holding stage may further comprise a low temperature particle collector, having a surface maintained at a collecting temperature below the ambient temperature, spaced apart a small distance from the stage.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: January 23, 2001
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joung-Sun Lee, Tae-hyup Kim
  • Patent number: 6078031
    Abstract: A method for joining well and other oilfield tubulars by amorphous bonding comprises the steps of positioning a body of amorphous material (16) between adjacent and surfaces of a pair of oilfield tubulars (3, 4) that are to be joined and using induction heating to melt the amorphous material and create on cooling a metallurgical bond between the tubulars (3, 4). Throughout the heating and bonding process the tubulars (3, 4) are fixed in axial alignment with each other using clamp means which include a mandrel (1) which is inserted into the interior of the tubulars (3, 4) so that the bonding process can be performed in a sealed chamber (17, 18) which is filled with an inert gas.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: June 20, 2000
    Assignee: Shell Research Limited
    Inventors: Alan Edgar John Bliault, Francis Alexander Cumming, Mark Seth Laws
  • Patent number: 5951734
    Abstract: A semi-convective forced air system for heating glass sheets during a heating cycle. The system has a heating chamber, and a longitudinal conveyor extending lengthwise through the heating chamber. A plurality of longitidinally-extending air manifolds are located within the chamber and are in fluid connection with a compressed air source. The manifolds are arranged in at least one widthwise-extending column. Each of the manifolds are oriented parallel to the length of the conveyor and are constructed and arranged to create a downward flow of heated air toward the conveyor to convectively heat the entire length of selected widthwise portions of a sheet of glass on the conveyor. A controller supplies or restricts the flow of compressed air to selected manifolds within a column at predetermined times during the heating cycle.
    Type: Grant
    Filed: August 15, 1997
    Date of Patent: September 14, 1999
    Assignee: TGL Tempering Systems, Inc.
    Inventors: Kenneth Friedel, Cliff Matukonis
  • Patent number: 5922234
    Abstract: Disclosed is a heating system for heating metal products in an oscillating induction furnace and a method of operation of the heating system. The heating system includes an oscillating induction furnace that in turn comprises a plurality of induction coils interspersed with a plurality of rollers. The metal products are oscillated within the induction coils on the plurality of rollers until heated to a target temperature. A logic device determines the power to be supplied to the induction coils, the number and speed of oscillation passes to conduct, the duration of time to be spent in the oscillating induction furnace, and the loading arrangement of the metal products within the oscillating induction furnace if two or more metal products are to be heated together in the oscillating induction furnace. The power supplied to the initial and final induction coils is metered by the logic device according to the proximity of the metal product to the initial and final induction coils.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: July 13, 1999
    Assignee: Geneva Steel
    Inventors: Robert J. Grow, W. Shane Swanger
  • Patent number: 5889263
    Abstract: A method and apparatus for induction sealing of a packaging material which includes a layer of aluminum foil. The apparatus includes an inductor with two parallel slightly spaced apart conductors which are disposed in an electrically insulated carrier portion. The conductors are connected to one another and to a high frequency current source by two transverse conductors. The transverse conductors are placed in the upper surface of the inductor and coincide with the outer defining lines of a flat-laid tube of packaging material.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: March 30, 1999
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventor: Mikael Andersson
  • Patent number: 5844213
    Abstract: An induction heating coil assembly for use in a roller induction heating line has a magnetic shunt for receiving a portion of an electromagnetic field generated along the axis of the induction coil and directing that portion along a path parallel to a workpiece passing along the heating line. This flux path ensures that eddy currents induced in the workpiece flow primarily perpendicular to the axis of the workpiece, and not along the axis of the workpiece where they could cause arcing between the moving workpiece and the conveyor rolls.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: December 1, 1998
    Assignee: Inductotherm Corp.
    Inventors: Vitaly Peysakhovich, Edward Rylicki
  • Patent number: 5645744
    Abstract: For forming or consolidating organic matrix composites, for example, an organic matrix composite panel is sealed in a "retort" between sheets of a susceptor material that is susceptible to induction heating. The susceptor sheets are heated inductively. The sheets in turn conduct heat to the organic matrix composite panel. When heated to the desired temperature, the composite panel is consolidated and/or formed. In the present invention, the susceptor sheets are selected so that their magnetic permeability decreases to unity at approximately the desired operating temperature thereby limiting heating to this "Curie temperature" and providing substantial uniformity of temperature in the panel. Of course, the concept applies to other induction heating operations for metals including SPF, brazing, annealing, heat treating, bonding, hot pressing, and the like.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 8, 1997
    Assignee: The Boeing Company
    Inventors: Marc R. Matsen, Karl A. Hansen, deceased, John J. deJong, executor
  • Patent number: 5624594
    Abstract: A fixed coil induction heater produces quality thermoplastic fusion welds in prefabricated resin composite parts. A susceptor along a bondline between parts aligns with the induction coil segments of a solenoid induction coil along the centerline of the coil. Energizing the coil heats the susceptor to form the weld at the bondline. For this operation, our induction heating workcell uses complementary dies that define a central cavity with an oval pattern of induction coil segments roughly conforming to the shape of the cavity and surrounding all faces of the cavity where we position the preform composite parts and susceptor.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 29, 1997
    Assignee: The Boeing Company
    Inventors: Marc R. Matsen, John A. Mittleider, Karl A. Hansen, deceased, by John J. deJong, executor
  • Patent number: 5592753
    Abstract: A method for separating volatile components from a particulate base material by induction heating, which method comprises: heating a particulate base material in an induction heating vessel within a gas-tight reactor by induction heating; agitating said particulate base material by induction heated agitator means; introducing inert gas into said base material; and evacuating volatilized components from said particulate base material.A method for separating volatile components from a solid object by induction heating, which method comprises: positioning the solid object in an induction vessel of a gas-tight induction heating reactor, so that the object is surrounded by metal filings; heating said object surrounded by said metal filings by induction heating; injecting an inert gas into said metal filings; evacuating volatile components from within said reactor; and removing metal filings from the object.
    Type: Grant
    Filed: May 25, 1994
    Date of Patent: January 14, 1997
    Assignee: Umwelt-Technics-Nord GmbH
    Inventor: Claus Gronholz
  • Patent number: 5591370
    Abstract: An apparatus for forming and consolidating organic matrix composites. An organic matrix composite panel comprising laid-up prepegs is placed between sheets of a susceptor material that is susceptible to inductive heating to form a workpiece. The resulting workpiece is placed within upper and lower dies formed of a material that is not susceptible to inductive heating. An induction coil embedded within the dies is energized and inductively heats the susceptor sheets surrounding the panel. The sheets in turn conductively heat the organic matrix composite panel. A pressure zone between the workpiece and one of the dies is pressurized to form the workpiece to the contour of a forming surface on one of the dies. The pressure in the pressure zone is maintained on the workpiece until the organic matrix composite panel is fully consolidated and formed.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: January 7, 1997
    Assignee: The Boeing Company
    Inventors: Marc R. Matsen, Paul S. Gregg, Howard Martinson, Robert Snyder
  • Patent number: 5584419
    Abstract: A method and apparatus are provided for heating a solid material and dispensing the material as a liquid. A central housing has an inlet, a dispensing orifice and a flow passage extending through the central housing for passing the material from the inlet to the dispensing orifice. A susceptor and induction coil are disposed within the flow passage for immersion within the material after it is liquified. The susceptor includes a conically shaped flow section which extends across the flow passage, and a plurality of flow ports for passing the material. The susceptor further includes a cylindrical section which extends downstream from the flow section for receiving the material from the flow section and passing material to the dispensing orifice. The induction coil is aligned with and spaced downstream from the flow section of the susceptor, surrounding part of the susceptor for electromagnetically inducing electric currents to flow within the flow section.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: December 17, 1996
    Inventor: Bernard C. Lasko
  • Patent number: 5580479
    Abstract: The high-frequency inductor heating tube (1) for solder injectors is furnished as a hollow cylinder formed at one end as a cylindrical receiver tube. Windings of an inductor (2) are disposed over length of the cylindrical receiver tube. A solder injector (13) made of a highly heat-conducting base material and covered with a ferromagnetic layer (16) is inserted into the cylindrical receiver tube. Claws (8) of a wire spring (9) inserted into elongated holes (7) disposed in a wall of the cylindrical receiver tube lock the solder injector (13) in the cylindrical receiver tube.
    Type: Grant
    Filed: May 11, 1995
    Date of Patent: December 3, 1996
    Inventor: Werner Bruns
  • Patent number: 5578233
    Abstract: An induction furnace for homogeneously heating flat steel products fed therethrough in a continuous line in a predetermined feeding direction includes a succession of heating assemblies and pairs of rollers placed between the heating assemblies for supporting and moving the flat products in the feeding direction. Each heating assembly has a narrow induction coil fed by a separate frequency converter and a linear flux concentrator. The coil extends transverse to the feeding direction. The size of the coil in the feeding direction of the flat products is 350 mm. or less. The flux concentrator is in proximity of the coil and extends along the longitudinal orientation of the coil. The flux concentrator has ends, an upper portion and a lower portion. The upper and lower portions are joined at each of the ends, and establish a central gap therebetween for the flat products to pass therethrough. The gap extends through the heating assembly in a direction transverse to the longitudinal orientation of the coil.
    Type: Grant
    Filed: May 23, 1994
    Date of Patent: November 26, 1996
    Assignee: Giovanni Arvedi
    Inventors: Giovanni Arvedi, Gosio Giovanni
  • Patent number: 5553729
    Abstract: An induction heating roller apparatus comprises a rotatable hollow cylindrical roller body made of magnetic material, a pair of end frames for closing the opposite opening ends of the roller body, having roller driving shafts in outer sleeve form, magnetic flux generating device comprising an induction coil wound on an iron core body positioned between the pair of end frames and in the hollow portion of the roller body, a pair of sleeve-like rods projecting from the opposite end surfaces of the iron core body and inserted for relative rotation into the outer sleeve of the shafts, and a pair of auxiliary magnetic flux generating mechanism comprising auxiliary induction coils wound on annular iron cores positioned inside the end frames and fixed at the base portion at which the sleeve-like rods are connected to the iron core body, and wherein the end frames comprise fitting edges fitted in the opposite openings in the roller body, flange portions continuous with the fitting edges and adapted to be applied to th
    Type: Grant
    Filed: August 23, 1995
    Date of Patent: September 10, 1996
    Assignee: Tokuden Co., Ltd.
    Inventors: Yoshio Kitano, Kozo Okamoto
  • Patent number: 5550353
    Abstract: An induction heating coil assembly for use in a roller induction heating line has a magnetic shunt for receiving a portion of an electromagnetic field generated along the axis of the induction coil and directing that portion along a path parallel to a workpiece passing along the heating line. This flux path ensures that eddy currents induced in the workpiece flow primarily perpendicular to the axis of the workpiece, and not along the axis of the workpiece where they could cause arcing between the moving workpiece and the conveyor rolls.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: August 27, 1996
    Assignee: Inductotherm Corp.
    Inventors: Vitaly Peysakhovich, Nicolas P. Cignetti, Hans G. Heine, John H. Mortimer
  • Patent number: 5483042
    Abstract: Apparatus for spacing a plurality of substantially plate-like ferromagnetic workpieces such as can lids, in face-to-face relationship along a row, comprises a plurality of magnetic elements, each extending longitudinally along the row and different ones of the elements being disposed at different angular positions around the row, each of the magnetic elements being disposed and oriented to prevent the workpieces from pivoting about a distal edge of the workpiece due to the combined magnetic attraction of the workpiece by all others of the magnetic elements.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: January 9, 1996
    Assignee: Nordson Corporation
    Inventors: Robert A. Sprenger, Ray C. Raffa
  • Patent number: 5483043
    Abstract: Induction heating is utilized to heat polymer matrix composites containing electrically conductive fibers. This is accomplished with an apparatus having a mold with first and second cores positioned to receive a workpiece therebetween and first and second induction coils mounted to the first and second cores, respectively. Each induction coil is encapsulated in a layer of non-electrically conductive material which is attached to a surface of the respective core. A thermal insulation layer is attached to each layer of material, and a skin layer is attached to each thermal insulation layer. Alternatively, the induction coils can be embedded in the corresponding mold core. In another alternative, a single helical induction coil can be disposed around the two mold cores.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: January 9, 1996
    Assignee: General Electric Company
    Inventors: Philip C. Sturman, Jr., Robert A. Gray
  • Patent number: 5448040
    Abstract: A roller for furnaces, is used with a plurality of rollers substantially parallel to each other. The roller is provided with a plurality of annular collars which are side by side and spaced apart. The annular collars are cooled by means of a flow of cooling fluid which is oriented transversely with respect to their axis and parallel to their median plane. The annular riders are made in tubular form and may be of toroidal form and are connected separately each to the supply duct and to the return duct for the cooling fluid. They may also be formed by the individual turns of a tubular spiral or by a number of successive segments of a spiral which are connected via their ends to the supply duct and to the return duct.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: September 5, 1995
    Assignee: Italimpianti S.p.A.
    Inventors: Stefano Deplano, Roberto Millone, Maurizio Patrone
  • Patent number: 5393959
    Abstract: An induction heating winding structure 5 is installed inside a hollow roller 1, which is closed at its opposite ends by flanges 2A, 2B. Driving shafts 4A, 4B integral with the flanges having coaxial holes are rotatably supported. The induction heating winding structure 5 is supported at its opposite side by support rods 9A, 9B. The support rods are in the coaxial holes 10A, 10B of the driving shafts through bearings. The roller 1 and flanges 2A, 2B are fastened together through taper fit. When it is desired to release the roller 1 from the flanges, the driving shafts and the support rods are temporarily fastened and one driving shaft 4B is supported in a cantilever manner. The roller 1 is mounted on a transport mechanism for mounting and dismounting.
    Type: Grant
    Filed: January 6, 1994
    Date of Patent: February 28, 1995
    Assignee: Tokuden Co., Ltd.
    Inventors: Yoshio Kitano, Kozo Okamoto
  • Patent number: 5357085
    Abstract: Induction heating is utilized to heat polymer matrix composite fiber strands containing electrically conductive fibers. This is accomplished with an apparatus having a helical induction coil and a matching helical guide tube situated adjacent to the induction coil. Composite fiber strands are drawn through the guide tube which is made of a non-electrically conductive, nonmagnetic material. Electrically conductive rollers, positioned next to the entrance and exit of the guide tube, form an electrical circuit with the electrically conductive fibers. This permits currents to be induced in the fibers when the coil is activated, thereby heating the fiber composites. The guide tube can be thermally insulated and flushed with an inert purge gas. Alternatively, the guide tube can be made of an electrically conductive or ferromagnetic material so that heat producing currents are induced in the guide tube, and the composite fiber strands are heated by conduction.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: October 18, 1994
    Assignee: General Electric Company
    Inventor: Philip C. Sturman, Jr.
  • Patent number: 5283053
    Abstract: A contact lens treating vessel equipped with an electromagnetic induction coil and a rectifier for converting an alternating current into a direct current, and an apparatus for treating contact lenses comprising a treating apparatus body for supplying electric power and the vessel which can be attached to or detached from the apparatus body, wherein the apparatus body is equipped with a magnet-generating coil and the vessel is equipped with an electromagnetic induction coil.
    Type: Grant
    Filed: October 21, 1992
    Date of Patent: February 1, 1994
    Assignee: Tomei Sangyo Kabushiki Kaisha
    Inventors: Hideaki Kamiya, Makoto Nakagawa, Masashi Endo, Masakatsu Yamauchi
  • Patent number: 5024756
    Abstract: A dialysis system and method is based upon a comparison of the value of a parameter being measured of the dialysis liquid after the dialyzer with a set value of the corresponding parameter being controlled before the dialyzer. Based upon this comparison, a measure of the dialysis performed is obtained, and with the assistance of this measured value, as well as the knowledge of other factors, for example, adjusted values relevant for the analysis, conditions of the patient's blood can be determined theoretically and thereby controlled.
    Type: Grant
    Filed: February 28, 1989
    Date of Patent: June 18, 1991
    Assignee: Gambro AB
    Inventor: Jan P. Sternby