Specific Electrode Configuration Patents (Class 219/780)
  • Patent number: 10506943
    Abstract: A method for monitoring an intrabody region of a patient. The method comprises intercepting electromagnetic (EM) radiation from the intrabody region in a plurality of EM radiation sessions during a period of at least 6 hours, calculating a dielectric related change of the intrabody region by analyzing respective the intercepted EM radiation, detecting a physiological pattern according to said dielectric related change and outputting a notification indicating the physiological pattern.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: December 17, 2019
    Assignee: Sensible Medical Innovations Ltd.
    Inventors: Ilan Kochba, Dan Rappaport, Amir Saroka, Shlomi Bergida, Nadav Mizrahi, Amir Ronen
  • Patent number: 9855355
    Abstract: An essential feature of the invention is the original combination of a plasma process and a sealing system. This is achieved with external tubes (4, 6), which are connected to each other so as to be impermeable to gas, but galvanically insulated, and of which at least one is electrically conductive, such that the external tubes form an antechamber between the two external tubes (4, 6) and a treatment chamber between the external tube (6) and the internal tube (1).
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: January 2, 2018
    Assignee: INP GREIFSWALD—LEIBNIZ-INSTITUT FÜR PLASMAFORSCHUNG UND TECHNOLOGIE E.V.
    Inventors: Joerg Ehlbeck, Manfred Stieber, Klaus-Dieter Weltmann
  • Patent number: 9851146
    Abstract: A dryer section for drying a web of fibrous material is provided, which has at least one drying unit for reducing the moisture content of the web by means of convection drying. The drying unit has at least one nozzle for applying a drying fluid to the web, at least one discharge device for the moist air produced during convection drying, and transport means for moving the web relative to the drying unit. The drying unit has at least one ultrasonic generator, which is arranged, for excitating vibrations in the drying fluid, in the region of the nozzle in such a manner that the reduction of the moisture content by ultrasound can be supported over the entire width of the web.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: December 26, 2017
    Assignee: Papierfabrik August Koehler SE
    Inventors: Manfred Huber, Joachim Uhl, Lutz Kuhne, Michael Boschert
  • Patent number: 9556057
    Abstract: The present invention concerns a bushing assembly comprising terminal ears (1) coupled to opposed end walls (2) of the bushing assembly, for heating the bushing tip plate and walls, each of said terminal ears comprising: (a) an electrically conductive plate, said conductive plate comprising at least a first portion (1A) extending along a longitudinal 1D axis (X1) from a first terminal edge (1D) substantially normal to said longitudinal axis (X1) 1B and coupled to a bushing end wall (2), and further comprising a second, free terminal edge (1C) connectable to a source of power, and (b) at least one elongated reinforcing member (1B) coupled to said at least first portion (1A) of said plate to increase the bending moment of the latter, characterized in that, said at least one elongated reinforcing member (1B) extends from, or adjacent to the plate first terminal edge (1D) along a direction non parallel to said longitudinal axis (X1).
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: January 31, 2017
    Assignee: 3B-Fibreglass Sprl
    Inventors: Philippe Simon, Dimitri Laurent
  • Patent number: 8772674
    Abstract: When applying a current to a plated steel plate, plating often biases. In the present invention, when applying a current, the current is applied with a flux guiding member arranged in proximity to a side surface of the plated steel plate. The direction of the magnetic flux at the side surface of the plated steel plate is corrected, and the bias of the plating is efficiently suppressed.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: July 8, 2014
    Assignee: Asteer Co., Ltd.
    Inventor: Kouji Shimotsu
  • Patent number: 8555778
    Abstract: The invention provides a freshness prolonging device for foodstuff for prolonging a shelf life of foodstuff by storing the foodstuff in a high electric field atmosphere. The freshness prolonging device for foodstuff includes an electrode plate to be removably mounted on a surface opposed to foodstuff stored in a food storage unit and a power source for applying a high voltage to the electrode plate. The electrode plate is composed of an electrically conductive rubber sheet hermetically sealed with a cover composed of a resin sheet.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: October 15, 2013
    Assignees: Minato Ichinose, Tsuneo Tounan, Mitsuru Fukumoto, Kiyoshi Takeda
    Inventors: Minato Ichinose, Mitsuru Fukumoto, Masayuki Ikeda
  • Patent number: 8253056
    Abstract: A resistance welding apparatus includes a welding gun having a first electrode tip serving as a first welding electrode, a second electrode tip serving as a second welding electrode, and a current branching electrode. The current branching electrode has an annular shape and is disposed in surrounding relation to the first electrode tip. The first electrode tip and the current branching electrode abut against a thinnest workpiece disposed on an outermost side of a stacked assembly that is resistance-welded by the resistance welding apparatus, and have opposite polarities to each other. When an electric current is passed from the first electrode tip to the second electrode tip and through the stacked assembly, a branched electric current flows from the first electrode tip to the current branching electrode.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: August 28, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventor: Akira Goto
  • Publication number: 20110278285
    Abstract: There is provided a heating/cooking equipment capable of accurately determining boiling over. The heating/cooking equipment includes: a top plate (104) connected to a reference potential; a heating unit (105) configured to heat an object to be heated placed on the top plate; an electrode (106) arranged under the top plate; a capacitance detecting unit (107) configured to detect the electrostatic capacitance of the electrode; a boiling over detecting unit (108) configured to detect whether or not a material to be cooked in the object to be heated has boiled over on the top plate, based on a value of the electrostatic capacitance detected by the capacitance detecting unit; and a control unit (109) configured to control the heating operation of the heating unit based on a boiling over detection result from the boiling over detecting unit.
    Type: Application
    Filed: January 21, 2010
    Publication date: November 17, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Masafumi Sadahira, Tomoya Fujinami, Naoaki Ishimaru, Izuo Hirota, Takahiro Miyauchi, Fumitaka Ogasawara
  • Patent number: 7909079
    Abstract: A radio frequency welding system for flexible work pieces having a top-side and an underside. The welding system includes a fixed weld platform, a mobile radio frequency welder adapted to move over the fixed weld platform, movable welding electrodes configured over the fixed weld platform and adapted to engage the underside of the flexible work pieces and movable grounding apparatus adapted to engage the fixed weld platform and the mobile radio frequency welder so as to provide a return radio frequency electrical circuit.
    Type: Grant
    Filed: January 10, 2006
    Date of Patent: March 22, 2011
    Assignee: GMA Cover Corp.
    Inventor: Glenn Verkindt
  • Patent number: 7883609
    Abstract: An alternating electric field is applied to ice (530) to generate a resistive AC having a frequency greater than 1000 Hz in interfacial ice at interface (554). A first electrode (510) and a second electrode (514) proximate to the interface are separated by an electrical insulator (512). An AC power source (520) provides a voltage of about 10 to 500 volts across the electrodes to create the alternating electric field. A portion of the capacitive AC associated with the alternating electric field is present in the interfacial ice as conductivity (resistive) AC, which causes dielectric loss heating in the interfacial ice.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: February 8, 2011
    Assignee: The Trustees of Dartmouth College
    Inventors: Victor Petrenko, Charles Sullivan, Lev Deresh
  • Patent number: 7795563
    Abstract: A technique for the design of 3-D RF welding electrodes by first modeling the surface of the welded part perimeter as a spline in a 3-D CAD program, and then dividing the spline up into multiple, small straight segments. The straight segments are offset simultaneously in opposite directions from the spline, to form two sets of straight segments, each set being equidistant from the spline, with the gap between the two sets equal to the target thickness of the welded package. New die faces are constructed from each of the sets using smoothing techniques, and 3-D models of the die faces are manufactured to check accuracy of the design, making sure that all the corresponding points of the pair of electrodes are equidistant, thereby creating a strong weld with good cosmetic results all along the parts being joined.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: September 14, 2010
    Assignee: Dielectrics Industries, Inc.
    Inventors: Adam S. Epstein, Stephen J. Wiater, Richard S. Mongeau
  • Patent number: 7781702
    Abstract: A cooking apparatus is disclosed. The cooking apparatus includes a housing having a cooking chamber and a heating unit. The heating unit includes a partition plate detachably installed in the chamber, the partition plate partitioning the chamber into sub-chambers, and a heater configured to heat at least one of the sub-chambers.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: August 24, 2010
    Assignee: LG Electronics Inc.
    Inventors: Young-Sok Nam, Hyeun Sik Nam, Yong Soo Lee, Seong Ho Cho
  • Patent number: 7531771
    Abstract: A reflector is so provided as to entirely cover a plurality of flash lamps arranged in parallel with one another. The reflector reflects flash light emitted from the flash lamps. A plurality of trigger electrodes needed to allow the flash lamps to discharge are so fixed to the reflector with insulating members interposed therebetween, respectively, as to be proximately opposed to the plurality of flash lamps in a one-to-one correspondence with each other. This eliminates the necessity to provide trigger wires one by one near the flash lamps during the maintenance of the apparatus, the change of lamps or the like, and it is possible to easily provide the trigger electrodes near the flash lamps only by fixing the reflector at a predetermined set position.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: May 12, 2009
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventor: Tatsufumi Kusuda
  • Patent number: 7470878
    Abstract: Thawing is achieved by applying high-frequency power to a frozen material (R) sandwiched between opposing electrodes. A thawing section of a thawing apparatus (10) includes unit electrodes (302) for a first electrode group as a former stage, unit electrodes (303) for a second electrode group as a latter stage, and unit electrodes (304) for a third electrode group as a further stage. The unit electrodes (302) for the first electrode group are set so that the area of the electrode surface is smaller than the area of the sandwiched surface of the frozen material (R). The unit electrodes (303) for the second top electrode group are larger than the area of the unit electrodes (302) for the first electrode group. The unit electrodes (304) for the third electrode group are larger than the area of the unit electrodes (303) for the second electrode group.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: December 30, 2008
    Assignee: Yamamoto Vinita Co., Ltd.
    Inventors: Yasuji Yamamoto, Toshihiro Imahori
  • Patent number: 7368685
    Abstract: An oven and a heating unit of the oven are provided. The oven includes a cavity, a heater, a food container, and an ohmic heater. A high temperature environment is formed in the cavity. The food container is mounted within the cavity to receive food therein. The ohmic heater is formed in the food container and allows power to be supplied to the food so that the food may be directly heated.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: May 6, 2008
    Assignee: LG Electronics Inc.
    Inventors: Hyeum Sik Nam, Young Sok Nam, Yong Soo Lee, Seong Ho Cho
  • Patent number: 7342209
    Abstract: A tube apparatus is provided to detect successful or failed tube operations. The tube apparatus includes jaws mounted for movement with respect to one another between (1) a first position spaced from one another and (2) a second position selected to perform a successful tube operation. A sensor is positioned to detect when the jaws have moved into the second position, and a timer is electrically coupled to the sensor for determining the time delay before the jaws have moved into the second position, wherein a time delay up to a predetermined time limit indicates a successful tube operation and a time delay exceeding the predetermined limit indicates a failed tube operation.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: March 11, 2008
    Assignee: State Technology, Inc.
    Inventor: John W. Dozier
  • Patent number: 7326898
    Abstract: FIG. 1 depicts a full view of the picnic table backrest. It shows the backrest, the bars that wrap around the bench to keep the back rest stable and the latch on the back of the rest that keeps the rest from slipping out. FIG. 2 shows a close up view of the latch on the rear of the backrest. The bar that holds the latch swivels upward to latch on to the top part of the backrest. This keeps the backrest from slipping out and also holds it in place so it doesn't shift while your sitting.
    Type: Grant
    Filed: October 22, 2004
    Date of Patent: February 5, 2008
    Assignee: State Technology, Inc.
    Inventor: John W. Dozier
  • Patent number: 7095000
    Abstract: Apparatus and methods are provided through which a radio-frequency dielectric heater has a cylindrical form factor, a variable thermal energy deposition through variations in geometry and composition of a dielectric, and/or has a thermally isolated power input.
    Type: Grant
    Filed: September 13, 2004
    Date of Patent: August 22, 2006
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: William Herbert Sims, III, Thomas J. Godfroy, Leo Bitteker
  • Patent number: 7087876
    Abstract: An alternating electric field is applied at an ice interface to generate a resistive AC current having a frequency greater than 1000 Hz in interfacial ice. Typically, a first electrode and a second electrode proximate to the interface are separated by an interelectrode distance of about 50 ?m to 500 ?m. An AC power source provides a voltage of about 10 to 500 volts across the electrodes in order to create the alternating electric field. Interfacial ice converts capacitive AC current into resistive AC current, which generates Joule heat in the interfacial ice.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: August 8, 2006
    Assignee: The Trustees of Dartmouth College
    Inventor: Victor F. Petrenko
  • Patent number: 7012232
    Abstract: An RF welder is disclosed that has circuitry that automatically affects system impedance so that, throughout the welding or embossing cycle, a generator is capable of sending energy through die and fabric at a predetermined frequency and cabling is capable of dissipating a load that is less than a preselected amount.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: March 14, 2006
    Inventors: Mark Gruenspecht, Timothy Hopper
  • Patent number: 6995345
    Abstract: An RF heating system for generating precision stray RF fields that can be used to heat materials. The RF heating system includes an RF power supply for generating RF signals and an electrode apparatus that is coupled to the RF power supply. An electrode apparatus according to the present invention has many advantages over existing electrode apparatuses. For example, the electrode apparatus is easier to manufacture, easier to duplicate, easier to control the manufacturing tolerances on the electrode system, and easier to correctly place and design the resulting RF stray field.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: February 7, 2006
    Assignee: Codaco, Inc.
    Inventor: Timothy D. Gorbold
  • Patent number: 6914226
    Abstract: RF energy provided by electrodes positioned between a product is used to heat a product that exhibits a variable impedance during the heating process. As the product's impedance changes during the heating process, RF heating system impedance can be maintained constant by adjusting the distance between the electrodes, adjusting the impedance of a variable impedance device connected between the RF power source and an electrode, or a combination of electrode distance adjustment and impedance adjustment of the variable impedance device. The system is particularly applicable to the heating or pasteurization of bulk food products with multiple heating zones.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: July 5, 2005
    Assignee: Comdel, Inc.
    Inventor: Steven Thomas Ottaway
  • Patent number: 6812445
    Abstract: An RF heating system for generating precision stray RF fields that can be used to heat materials. The RF heating system includes an RF power supply for generating RF signals and an electrode apparatus that is coupled to the RF power supply. An electrode apparatus according to the present invention has many advantages over existing electrode apparatuses. For example, the electrode apparatus is easier to manufacture, easier to duplicate, easier to control the manufacturing tolerances on the electrode system, and easier to correctly place and design the resulting RF stray field.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: November 2, 2004
    Assignee: Codaco, Inc.
    Inventor: Timothy D. Gorbold
  • Patent number: 6800835
    Abstract: Apparatus and methods are provided through which a radio-frequency dielectric heater has a cylindrical form factor, a variable thermal energy deposition through variations in geometry and composition of a dielectric, and/or has a thermally isolated power input.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: October 5, 2004
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: William Herbert Sims, III, Thomas J. Godfroy, Leo Bitteker
  • Patent number: 6794624
    Abstract: A dielectric tube sealer is provided with first and second jaws oriented along a jaw axis and positioned to receive a tube portion in a space therebetween. The first jaw is fixed and is coupled to a radio frequency generator. The second jaw is movable with respect to the first jaw along the jaw and is coupled to ground potential. The second jaw is mounted on a single shaft. At least a portion of the shaft extends along a shaft axis that is substantially parallel to, but spaced from, the jaw axis.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: September 21, 2004
    Inventor: John W. Dozier
  • Publication number: 20040108314
    Abstract: There is disclosed a heating apparatus which has an electrostatic adsorption function and which comprises at least a supporting substrate, an electrode for electrostatic adsorption formed on a surface of one side of the supporting substrate, a heating layer formed on a surface of the other side of the supporting substrate, and an insulating layer formed so that it may cover the electrode for electrostatic adsorption and the heating layer wherein a volume resistivity of the insulating layer is varied in a plane. Thus, there can be provided a heating apparatus which has an electrostatic adsorption function wherein uniformity of a temperature distribution in a plane of the wafer when the wafer is heated can be improved, and the wafer can be heat-treated uniformly.
    Type: Application
    Filed: October 30, 2003
    Publication date: June 10, 2004
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Shoji Kano, Kenji Satoh, Kenji Ito
  • Patent number: 6607583
    Abstract: A method and apparatus for controlling the heating of adsorbent materials in a vessel including the utilization of electrodes in direct contact with the adsorbent material to induce a current in the material. The electrical contacts are spaced apart and receive a potential for inducing the electrical current; one of the electrodes is a different size to thereby induce a radial component in the electrical current to thus modify the current density flowing through the adsorbent material as the current traverses the distance between the electrodes. The resulting modified current density causes the temperature gradient across the transverse section of the vessel to decrease, thus rendering the temperature more uniform across the vessel.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: August 19, 2003
    Inventors: Harold R. Cowles, William J. Stanley, Christopher M. Cueman
  • Patent number: 6559432
    Abstract: A fixture for use with a radio-frequency welding press includes an independent electrode that is not attached to a platen of the press and which is used to register directly on flexible material workpieces to locate and hold workpieces during a welding operation. The invention also includes shuttles that slidably move welding fixtures to respective positions beneath and laterally away from press platens so that welding and workpiece removal and loading operations can be performed simultaneously on fixtures mounted to respective shuttles. Methods and alternate embodiments are disclosed.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: May 6, 2003
    Assignee: Casco Products, Inc.
    Inventor: James B. Moore, Jr.
  • Patent number: 6423955
    Abstract: A method and apparatus for dielectric drying is disclosed wherein a load to be heated positioned on a carrier the bottom of which provides a secondary electrode is moved with the carrier a dielectric heating chamber having a primary electrode positioned above load when said load on said carrier is moved into an operative position in the chamber. The carrier and load are elevated into heating position and this movement simultaneously connects the secondary electrode to ground, so that when high frequency power is applied to the primary electrode the circuit is made to dielectrically heat the load.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: July 23, 2002
    Assignee: Heatwave Technologies Inc.
    Inventors: Glenn Craig Blaker, Terry Albert Enegren, Yiu Kwan (Eugene) Ho, Scott Ronald Spencer
  • Publication number: 20020092849
    Abstract: An alternating electric field is applied at an ice interface to generate a resistive AC current having a frequency greater than 1000 Hz in interfacial ice. Typically, a first electrode and a second electrode proximate to the interface are separated by an interelectrode distance of about 50 &mgr;m to 500 &mgr;m. An AC power source provides a voltage of about 10 to 500 volts across the electrodes in order to create the alternating electric field. Interfacial ice converts capacitive AC current into resistive AC current, which generates Joule heat in the interfacial ice.
    Type: Application
    Filed: October 11, 2001
    Publication date: July 18, 2002
    Inventor: Victor F. Petrenko
  • Patent number: 6346693
    Abstract: A grain containment vessel equipped with one or more antennas and a vapor extraction system is disclosed. An electromagnetic heating pattern is established throughout the grain volume elevating the bulk temperature, while an air flow is applied throughout the grain volume. The electromagnetic energy desorbs the water and increases the vapor pressure and the air flow carries the heat and water from the containment vessel. A controlled amount of electromagnetic energy is introduced into the grain volume to reduce or eliminate fungus infestation and increase insect mortality.
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: February 12, 2002
    Assignee: KAI Technologies, Inc.
    Inventor: Raymond S. Kasevich
  • Patent number: 6323473
    Abstract: A prepackaged food sterilizing apparatus for sterilizing a prepackaged food P has a high frequency generator 71. A high frequency is supplied from the high frequency generator 71 to the prepackaged food P to sterilize the prepackaged food P by dielectric heating. The apparatus includes a food loading container 2x constituted by a pair of opposing electrodes 20 consisting of a lower electrode 210 and an upper electrode 220 to which the high frequency is supplied and an annular insulator 23 interposed between the opposing electrode pair 20. The food loading container 2x has at least one food loading chamber 21 in which the prepackaged food P is loaded with an inner shape thereof substantially equal to an outer shape of the prepackaged food P.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: November 27, 2001
    Assignee: Yamamoto Vinita Co., Ltd.
    Inventors: Yasuji Yamamoto, Yoshio Akesaka, Junichi Kodama
  • Patent number: 6247395
    Abstract: An object of a high-frequency thawing apparatus is to uniformly thaw an entirety of an article with high efficiency and high-speed, particularly an article having a relatively large thickness. The apparatus is so constructed that a high-frequency power from a high-frequency generating circuit is supplied to a pair of opposing electrodes by way of an impedance matching circuit including a transformer to thaw an article (F) which is carried in between the opposing electrode pair by dielectric heating. The impedance matching circuit includes an electrostatic capacitor section (C) and an inductance section (L). A conductor each constituting the inductance section (L) has such a length that the downstream-located conductor with respect to the transport direction of a conveyor is longer than the upstream-located conductor.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: June 19, 2001
    Assignee: Yamamoto Vinita Co., Ltd.
    Inventor: Yasuji Yamamoto
  • Patent number: 6246040
    Abstract: A solid state radio frequency (RF) generator for dielectric heating of food products. In the preferred embodiment, a distributed oscillator comprising an array of solid state devices (e.g., MOSFETs) and a high voltage inductor drives a capacitor to produce an intense alternating electric field. Dielectric materials moving through the field, preferably food products in a glass pipe, are substantially instantaneously, preferentially, and uniformly heated by the field. Operators of the heater may observe the process, and may incorporate a number of heating stages into a food processing system having an easily controllable temperature profile. The use of a large number of individual low-cost low-power devices increases the reliability and ease of maintenance of the generator. Each coil turn of the inductor is shunted by a tuning capacitor to evenly distribute the load across all inductor coil turns.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: June 12, 2001
    Inventor: Bradley R. Gunn
  • Patent number: 6225612
    Abstract: A dielectric heating or drying system incorporating an electrode structure, which is provided with wings that projects toward the opposite electrode along each side of a planar central portion of the electrode and function to improve electric field uniformity through the load being dried.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: May 1, 2001
    Assignee: Heatwave Drying Systems Ltd.
    Inventor: Terry Albert Enegren
  • Patent number: 6080978
    Abstract: A dielectric drying kiln material handling system includes a bottom electrode incorporating a conveyor system for moving material along said bottom electrode for moving material on and off of the electrode. Conveyors are built into the electrode in a manner so that the electrode surface of the bottom electrode, i.e. the surface contacting material to be dried is configured with gaps having dimensions so that the gaps do not significantly affect the uniformity of the power distribution over the electrode surface. Various types of conveyors may be used such as slat conveyors, roller conveyors, belt conveyors and the like provided the gaps, i.e. between the slats receiving the rollers or for accommodating the return rollers belt type conveyor are configured with dimensions so that the gaps do not significantly affect the uniformity of electromagnetic field and power distribution over the effective surface of the bottom electrode.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: June 27, 2000
    Assignee: HeatWave Drying Systems Ltd.
    Inventors: Glenn Craig Blaker, Terry Albert Enegren, Yiu Kwan Ho, Gary Kenneth Kooznetsoff, Robert Lewis Zwick
  • Patent number: 6030490
    Abstract: A bonding apparatus for bonding a thermoplastic pad having a predetermined peripheral shape to a first surface of a carpet using radio frequency energy includes a die electrode and a backing electrode. Both the die electrode and the backing electrode have a peripheral shape that corresponds to the peripheral shape of the pad. In addition, both the die electrode and the backing electrode may have a relief feature thereon that are correspondingly sized and located. Concentrations of electric field intensity in the vicinity of the peripheral edge of the die electrode and along the edges of the relief feature on the die electrode are minimized so that bonding of a pad to a carpet may be effected without thermal runaway. The pad is bonded to the carpet without the occurrence of localized burning of the carpet pile or perforation of the pad.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: February 29, 2000
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Harry Bernard Francisco, Ronald Jack Riegert
  • Patent number: 6023055
    Abstract: A heating apparatus for heating a prepackaged food, is provided with a heater which heats a prepackaged food, an enclosure which defines an airtight chamber operable to accommodate the prepackaged food, and a pressure controller which controls the inside pressure of the airtight chamber. The heater includes a pair of electrodes which are arranged face to face, and an electric power source which supplies a high frequency electric power. The inside pressure of the airtight chamber is controlled in response to an expansion of the prepackaged food being heated to prevent the packaging container from breaking out.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: February 8, 2000
    Assignee: Yamamoto Vinita Co., Ltd.
    Inventor: Yasuji Yamamoto
  • Patent number: 5981930
    Abstract: A canister is provided for preventing the emanation of a vaporized fuel gas. The canister is capable of quickly heating the activated carbon through the resistance thereof up to a required temperature at the time of desorption of the vaporized fuel gas. The canister comprises a container having a vaporized fuel gas inlet port and an exit port. An aggregate of activated carbon is filled in the container to adsorb the vaporized fuel gas, and at least a pair of electrodes are provided for heating the activated carbon through the resistance thereof, at the time of desorption of the vaporized fuel gas. A highly electrically conductive activated carbon is used having an electric resistance of not larger than 500 .OMEGA./2.5.sup.3 cm.sup.3.
    Type: Grant
    Filed: September 17, 1998
    Date of Patent: November 9, 1999
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masajiro Inoue, Jun Takizawa
  • Patent number: 5942146
    Abstract: A dielectric drying kiln having a moveable electrode permanently electrically connected with a source of power via an electrical connector formed by a plurality of discrete interconnected electrically and mechanically interconnected conducting element that permit relative movement between the elements. One end of the electrical connector is connected to the moveable electrode and moveable therewith while said electrical connector maintains electrical connection with the source. The electrical connector has a minimum curvature on its outside surface having a radius of at least r to prevent arcing.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: August 24, 1999
    Assignee: HeatWave Drying Systems Ltd.
    Inventors: Glenn Craig Blaker, Terry Albert Enegren
  • Patent number: 5834746
    Abstract: The invention relates to a method for the heat treatment of meat products in a feeding element (4) by means of high-frequency electromagnetic waves, and an apparatus for the execution of the method. The invention also relates to an advantageous application of an apparatus according to the invention. The object of the invention is to increase the depth of penetration of the electromagnetic waves in a product which is to be heated or boiled, where the electrodes (2, 3; 20, 22) are external and placed on the outside of the feeding element (4). The object is achieved by placing a product electrode (15) in the feeding element (4), in that said product electrode (15) serves as a short-circuiting element and is of a material having an electrical conductivity which is better than that of the product that is required to be heat treated.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: November 10, 1998
    Assignees: APV Pasilac A/S, Tulip International A/S
    Inventors: Henning Pedersen, Bo Kjeld Pedersen, Boerge Kjellerup
  • Patent number: 5789725
    Abstract: A cable assembly (8, 80) including an electrical cable (10) having a flexible tubular jacket (12) and a reinforcing structure (14) attached to the outside of the jacket in a smooth sealing connection (30), and a method of using radio-frequency electrical energy, applied radially through the cable jacket (12) and the reinforcing structure (14), to make the connection (30). A shield conductor (26) inside the cable jacket (14) may be used as an RF electrode, with a second RF electrode (42, 44) circumscribing a portion of the cable (12) and the reinforcing structure (14) and shaping the outer surface of the connection. The RF energy may be used instead to activate an adhesive (108). An outer electrode (118) may be embedded in the reinforcing structure (116) in one variation of the invention.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: August 4, 1998
    Assignee: The Whitaker Corporation
    Inventors: James Francis McIntire, Larry Duane Stopper, Robert Lee Beckman, Dan Alan Vance, Daniel B. Smith, Bruce Alan Barney
  • Patent number: 5736719
    Abstract: Method and apparatus employing radio frequency electric energy for heat sealing of laminated packaging materials, particularly aseptic packaging materials, that include facing contiguous layers of thermoplastic material, including first and second seal jaws having respective working surfaces. The working surface of the first seal jaw is defined by a plurality of working faces of alternating layers of electrically conductive and electrically nonconductive materials.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: April 7, 1998
    Assignee: International Paper Company
    Inventors: Douglas K. Lawson, Charles J. Kimmel
  • Patent number: 5712469
    Abstract: Method of curing inaccessible thermoset adhesive joints, comprising: forming structures to be bonded at mating surfaces when assembled, the shortest distance from the mating surfaces to the exterior of the assembly inhibiting the application of radio frequency heating by exterior electrodes; while forming the structures, molding into a least one of the structures, spaced from the surfaces to be adhered, a fiber or film-like electrode of sufficient thickness and spacing to project radio frequency waves through such one structure to the adhesive when energized; assembling the surfaces together with a thermoset adhesive therebetween in intimate contact of each of the surfaces; and connecting the fibrous or thin filmed electrode in a circuit for passing radio frequency waves across the adhesive to effect dielectric heating of the adhesive for a controlled period of time and at a predetermined temperature rise for curing.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: January 27, 1998
    Assignee: Ford Global Technologies, Inc.
    Inventors: Kimberly Ann Chaffin, Ray Alexander Dickie
  • Patent number: 5695671
    Abstract: A control system for controlling the heating of a product in a dielectric oven comprises at least one dielectric heating circuit including an electromagnetic energy source, such as a triode vacuum tube, having an anode and a resonant circuit including at least one inductor and at least a pair of capacitors. Each capacitor includes two capacitor plates and one of these capacitor plates is moveable, such that each pair of capacitors forms a variable capacitor in which the product to be heated is a dielectric. The system also includes at least one ammeter for measuring actual anode current at the anode. A motor is used to increase or decrease a distance between the plates of at least one of said capacitors, thereby adjusting the electromagnetic energy delivered to the product. A processor receives ammeter measurements, whereby the distance between the pair of capacitor plates is adjusted to increase or decrease the actual anode current.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: December 9, 1997
    Assignee: Henney Penny Corporation
    Inventors: Tim A. Landwehr, Gary L. Mercer, Joseph P. Miklos
  • Patent number: 5651907
    Abstract: A removable tray holds a product for heating in a dielectric oven. The tray comprises at least one wall defining an interior, wherein the at least one wall is made from a non-electrically conductive material, such as a polycarbonate resin having a thickness in a range of about 0.08 to 0.09 inches (about 2.03 to 2.29 mm). The at least one wall includes at least a first and a second electrode. Each of the electrodes comprises a first portion and a second portion, wherein the first portion is separated from the tray interior by a thickness of polycarbonate resin in a range of about 0.01 to 0.03 inches (about 0.25 to 0.76 mm). The first portions bracket the product, are substantially parallel to each other, and are encased within the at least one wall. Each of the second portions has an exposed area which when the tray is placed in the oven is coupled with an electromagnetic energy source to produce an electromagnetic field between the electrodes.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: July 29, 1997
    Assignee: Henny Penny Corporation
    Inventor: Joseph P. Miklos
  • Patent number: 5621845
    Abstract: Improved methods and apparatus are disclosed for confining ohmic heating currents to a subsurface formation in the use of in situ ohmic heating for recovery of volatile and semi-volatile materials, such as hazardous waste, hydrocarbon-like materials, and valuable minerals having thermally responsive properties. Spacing between emplaced electrodes and the number of electrodes employed are controlled to cause coupling between electrodes for more uniform and higher temperature heating. Electrode designs are disclosed which suppress spurious earth currents which would heat other formations not of interest. Suppression of electrode end currents is accomplished by the use of distinct rings of insulation, control of the applied potential along the electrode, and injection or withdrawal of fluids at distinct locations along the electrode.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: April 15, 1997
    Assignee: IIT Research Institute
    Inventors: Jack E. Bridges, Guggilam C. Sresty
  • Patent number: 5607613
    Abstract: An electroheating cell operating at low voltage and mains frequency, i.e., 60 Hz, is effective in heating a variety of food products including liquid egg products for general processing, as well as pasteurization and sterilization. The electroheating cell includes at least a pair of spaced electrode assemblies each including an electrode spaced from a barrier in contact with the food product by a gap containing an electrolyte solution.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: March 4, 1997
    Inventor: David Reznik
  • Patent number: 5556567
    Abstract: A control system for controlling the heating of a product in a dielectric oven comprises at least one dielectric heating circuit including an electromagnetic energy source, such as a triode vacuum tube, having an anode and a resonant circuit including at least one inductor and at least a pair of capacitors. Each capacitor includes two capacitor plates and one of these capacitor plates is moveable, such that each pair of capacitors forms a variable capacitor in which the product to be heated is a dielectric. The system also includes at least one ammeter for measuring actual anode current at the anode. A motor is used to increase or decrease a distance between the plates of at least one of said capacitors, thereby adjusting the electromagnetic energy delivered to the product. A processor receives ammeter measurements, whereby the distance between the pair of capacitor plates is adjusted to increase or decrease the actual anode current.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: September 17, 1996
    Assignee: Henny Penny Corporation
    Inventors: Tim A. Landwehr, Gary L. Mercer, Joseph P. Miklos
  • Patent number: 5541392
    Abstract: A removable tray holds a product for heating in a dielectric oven. The tray comprises at least one wall defining an interior, wherein the at least one wall is made from a non-electrically conductive material, such as a polycarbonate resin having a thickness in a range of about 0.08 to 0.09 inches (about 2.03 to 2.29 mm). The at least one wall includes at least a first and a second electrode. Each of the electrodes comprises a first portion and a second portion, wherein the first portion is separated from the tray interior by a thickness of polycarbonate resin in a range of about 0.01 to 0.03 inches (about 0.25 to 0.76 mm). The first portions bracket the product, are substantially parallel to each other, and are encased within the at least one wall. Each of the second portions has an exposed area which when the tray is placed in the oven is coupled with an electromagnetic energy source to produce an electromagnetic field between the electrodes.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: July 30, 1996
    Assignee: Henny Penny Corporation
    Inventor: Joseph P. Miklos