Abstract: A fixing device includes a heating roller which is made of a magnetic metal, a coil which is made of a plurality of twisted wires, an exciting circuit which applies a high-frequency current to the coil, and a core which is made of a heat resistant resin and is arranged inside the heating roller. The core has two grooves, each of the grooves being formed on a surface of the core and running along a longitudinal direction of the core. Parts of the coil are buried in the grooves such that a distance between the outer surface of the coil wound on the core and the inner surface of the heating roller is constant.

Abstract: An apparatus (10) and method for preheating welds uses a centered induction plate (12) having preferably a plurality of induction coils (30, 32) to impart the generation of heat in the materials to be welded (14), being interactively controlled by at least a temperature sensor (90, 92) and power supply control loop (16) so that even preheating can be obtained for a selected length of time given the parameters of the weld desired.

Abstract: A cutting device (10) for cutting a material (12) and providing a cut portion of the material (12). The device comprises a heating assembly comprising an electrical induction arrangement (32) for heating the cut portion of the material by induction heating.

Abstract: An insulation application and replacement system method for use on electric induction heating coils used to heat billets in industrial applications. Re-lining induction coil heating devices with non-hazardous materials of the invention uses a multiple step process of removing existing hazardous installation materials and replacing with multiple layers of environmental and user safe glass cloth material treated with suspended refractory material in a carrier solution.

Abstract: An electrophotography fixing device has a heating roller and an induction heating device. In order to improve heat resistance, heat radiating performance and insulation performance and in order to appropriately uniformly heat the heating roller, in the induction heating device, induction heating coils wound onto a core are fixed by varnish mixed with mica, and the outside surfaces thereof are fixed by a heat resistant bundling band or a molded body of a heat resistant material, or coated with a heat resistant, insulating and thermal conductive sheet. Alternatively, the same sheets as the above described sheet are provided between the core and the coils and between the layers of the coils. In addition, the core is formed with a hole extending in axial directions or holes extending in directions perpendicular to the axial directions. Moreover, the coils are doubly insulated.

Abstract: A high frequency induction-heating device 3 of the apparatus 1 for heating work includes a pair of opposite work coils accommodated within the coil casings 17 and 19 respectively. The casings 17 and 19 can be displaced in a unit by a motor provided under the device. Thus, the distance between the pair of work coils, and the distance between the work (W) and each work coil can be adjusted. The apparatus includes a plurality of heating devices 3 to which high frequency power sources are provided respectively. The apparatus and method for heating of a work with the apparatus is capable of treating a plurality of works (W) continuously under controlled conditions on work coil shapes and positions depending on the size and/or the shape of the works (W).

Abstract: An apparatus for hardening cylindrical bearing locations on a shaft, in particular a crankshaft, in which transition radii to the adjacent shaft parts are of undercut design, is provided with a heating unit, which is connected to a power supply, and with an inductor. The inductor has two heating conductor arms, which are arranged at a distance from one another and each run in the peripheral direction of the bearing location that is to be hardened. Each of the two heating conductor arms is provided with an inner bearing-surface hardening branch and two outer radius hardening branches, the bearing-surface hardening branch in each case being mechanically connected to the radius hardening branches by current-carrying elements which bear the radius hardening branches. The mechanical connection is sufficiently elastic for the radius hardening branches to be displaceable relative to the bearing-surface hardening branch in the axial direction of the shaft that is to be hardened.

Abstract: An induction heating coil having little high-frequency loss and producing little hast is easily manufactured by covering a conductor with a first insulating material to form a wire, then bundling and twisting such wires to form a stranded wire, covering the outer surface of the stranded wire with a second insulating material to form a coil wire, winding the coil wire a certain number of turns into a coil portion having a certain shape. The end portion of the coil portion and a connecting portion are heated with Joule heat while applying pressure to the end portion at the same time, so that the first and second insulating materials are fused and pressure-bonded to the conductor. Thus a terminal portion for the external connection of the coil portion is fixed while keeping the electrical connection with the conductor. Accordingly, an induction heating coil of low cost and stable quality can be easily manufactured.

Abstract: A heat apparatus for an electromagnetic induction heating system comprises a heat roller that comprises magnetic and conductive material. The heating apparatus also comprises a magnetic excitation coil that is positioned around a portion of the periphery of the heat roller. The magnetic excitation coil is configured to generate a magnetic field that extends to the heat roller, to generate an eddy current within the heat roller, and to generate Joule heat within the heat roller. The magnetic excitation coil is configured to generate a smaller magnetic field at the center area of the heat roller than at the side areas of the heat roller.

Abstract: A method and a device for manufacturing packages are provided. The method comprises providing a tubular first package part of a sheet of thermoplastic coated packaging material including at least one layer of an induction heatable material. The first package part has a sealed first joint between two mutually opposing edge sections of the sheet. The method further comprises joining together the first package part and a second package part by a second joint, the first and the second joint intersecting each other. The method further comprises arranging induction heating means including at least two conductors extending along each other, so that the conductors extend along the second joint and sealing the second joint by feeding an inducing current through the induction heating means. The inducing current is conducted by the conductors along the second joint in opposite directions in said at least two conductors.

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.

Abstract: A raw tire-preheating method and apparatus for preheating a raw tire uniformly over all the areas with a reduced running cost. The raw tire-preheating apparatus comprises a tread section-preheating mechanism (16) including a front coil (21) disposed so as to face a tread section (4a) for generating a high frequency magnetic field and for applying it to the tread section (4a); and a core mechanism consisting of center cores (24), separation cores (25) and side cores (26) for providing an intensity distribution of the high frequency magnetic field that the tread section (4a) is uniformly preheated overall in the tire width direction. A movement mechanism for moving at least one of the tread section-preheating mechanism (16) and the raw tire (4) is provided in order to move the tread section-preheating mechanism (16) relative to the tread section (4a).

Abstract: An induction heating coil device includes a workpiece having one or more planar surfaces, and an induction coil having a number of coil turns arranged in inwardly converging shape and arranged to have planes of the coil turns offset from each other for generating high frequency wave. The planes of the coil turns are disposed parallel to the planar surfaces of the workpiece, for allowing the workpiece to be evenly or uniformly heated by the high frequency wave generated by the coil turns of the induction coil. The induction coil may include one or more insulating rings attached onto the coil turns, for preventing the coil turns from being electrically contacted with the planar surface of the workpiece.

Abstract: The present invention relates to a device including a body to be heated to which a magnetic field is supplied to generate heat and which heats a developer on a material to be recorded, a plurality of coil bodies which generate an induced heat in the body to be heated from the outside of the body to be heated and which include litz wires having cross sections formed in rectangular shapes and which are disposed in a longitudinal direction of the body to be heated, and a pressure applying member which contacts the body to be heated in a predetermined position and which fixes the developer on the material to be recorded passing between the pressure applying member and the body to be heated.

Abstract: Heating systems and methods for inductive heating or a combination of resistive and inductive heating. A heater coil is inductively coupled to an article and a current signal is supplied to the heater coil. The heater coil generates a magnetic flux, based on the applied current signal, for inductively heating the article. Current pulses of a certain profile are used to enhance the rate, intensity and/or power of inductive heating delivered by the heating element or coil and/or to enhance the lifetime or reduce the cost of the inductive heating system.

Abstract: A composite cooking apparatus having a body, a heating unit, and an induction heating unit. The heating unit is positioned in the body to generate heat used to heat food. The induction heating unit is positioned adjacent to the heating unit to generate a magnetic field to cook the food by induction heating. The induction heating unit has at least one wire, a coating of which is exposed to an electron beam to strengthen a heat resistance thereof.

Abstract: An induction heating device for inductively heating an object to be heated which is formed of conductive material has a holder. The holder is positioned outside the object. The device has an exciting coil for inductively heating the object. The exciting coil is supported by the holder. The exciting coil is composed of a plurality of turns of conductor forming a layer, which is positioned along the object. The device also has a demagnetizing coil which is positioned along the layer of the exciting coil. In the demagnetizing coil, a back electromotive force is induced in accordance with a magnetic field produced by the exciting coil, so as to cancel the magnetic field. Stability in the temperature control for the object such as a heating roller can be improved by effective function of the demagnetizing coil. The device can be miniaturized and configured at low cost.

Abstract: An induction heating and melting system uses a crucible formed from a material that has a high electrical resistivity or high magnetic permeability, and one or more inductor coils formed from a wound cable consisting of multiple individually insulated copper conductors to form an induction furnace that, along with its associated power supply, provides a compact design. The system components are air-cooled; no water-cooling is required. The crucible may alternatively be shaped as a tunnel or enclosed furnace.

Abstract: A delivery apparatus is provided by the invention. The delivery apparatus includes a container for holding an article to be delivered and a heater. The container includes a housing forming an interior area and an opening. The opening is provided with a size sufficient to allow movement of the article from outside the container to within the interior area, and from within the interior area to outside the container. The heater is provided for placement within the interior area for heating the article. The heater includes an electrically conductive coil for providing an electric current when exposed to a magnetic field, and an electrical resistance heating element for generating heat. The electrical resistance heating element is provided in electrical connectivity with the electrically conductive coil. A delivery apparatus assembly is provided which includes an induction range for generating a magnetic field. A heater and a method for delivering food are provided by the invention.

Abstract: A heating apparatus has a magnetic flux generator and a rotatable induction heating element for generating heat through electromagnetic induction by the action of magnetic flux generated by the magnetic flux generator, and heats a material to be heated by causing the material to be heated to contact the induction heating element. The heating apparatus further includes a thermistor for detecting a surface temperature of the induction heating element, power supply circuits for controlling power to be supplied to the magnetic flux generator on the basis of signals from the temperature detection, a Curie temperature reaching detector for detecting that the temperature of the induction heating element reaches the Curie temperature, and control circuits for detecting that the material to be heated is wound around the induction heating element on the basis of signals from the thermistor and the Curie temperature reaching detector.

Abstract: An apparatus and process are provided for controlling the cross sectional temperature profile of a continuously moving workpiece with an induction coil assembly that provides for a combination of longitudinal and transverse magnetic flux field heating of the workpiece. The induction coil assembly includes means for laterally moving the workpiece in and out of the coil assembly without movement of the coil assembly.

Abstract: Multiple workpieces are inductively heated by passing them through one or more induction heating coils. Passage of a section of each workpiece through a coil may oscillate in the forward and reverse directions, independent of the movement of the other workpieces, one or more times, to selectively heat each workpiece while operating the power supplies for each of the induction heating coils at constant current, voltage and/or power to maximize the efficiency of the electrical circuit and minimize the requirements for power supply control circuitry.

Abstract: A device for instantly pre-heating dies includes an inductive heating coil disposed between two dies. The inductive heating coil includes a spiral shape for generating high frequency induction heat energy. When the dies are separated by a mechanical arm, the inductive heating coil is disposed between die surfaces of the dies, so that high frequency induction heat can act on a die contact part, to allow the die contact part to be pre-heated instantly. As result, not only its pre-heating efficiency is enhanced, electric energy can also be saved and at the same time, the melted plastic material may be ensured to smoothly flow inside the die contact parts.

Abstract: A method of induction heat treatment of articles having curved outer surfaces, such as differential housings. The method employs a semi-rectangular induction coil that is adapted to provide a plurality of lateral magnetic fields that are used to induce currents in, and thereby provide heat to, a portion of the curved section of the article. The method and induction coil are particularly adapted to provide an induction hardening heat treatment of a curved heat treatment portion of a differential housing. The differential housing was cast from nodular iron. The induction-hardening heat treatment comprised heating the heat treatment portion of the differential housing above the austenite transition temperature and quenching to below the martensite transformation temperature.

Abstract: The present invention of a device for advancing even distribution of high cycle wave magnetism uses a coil body having characteristics of conducting high cycle wave magnetism energy. The coil body is coiled in such a way that appears to have undulating distributed layers structure. A plurality of neighboring coil parts is annularly formed to become the coil body. Magnetism goes through any two neighboring coil parts will not repel or counteract each other because the neighboring coil parts are not on the same plane. Thus the present invention can advance high cycle wave magnetic field distributed more evenly.

Abstract: An induction heater (14) for use in conjunction with an associated furnace (10) for material processing includes essentially straight induction coil (16, 50) arranged inside the furnace shell (12). The induction coil (16, 50) has an attachment end (32, 54) extending outside of the furnace shell through a first opening (40) therein. A replacement induction coil (54R) is selectively connected with the attachment end (32, 54) of the induction coil (16, 50) and slidably inserted into the furnace shell (12) whereby the essentially straight induction coil (16, 50) is simultaneously slidably pushed out of the furnace shell (12) through a second opening therein.

Abstract: An apparatus in the production of a package or a packaging material comprising at least one metal layer and one polymer layer, the apparatus including an inductor connectable to a high frequency current source. According to the invention, said inductor includes a core (1) of a ferromagnetically conductive material, the core displaying two shanks (5a, 5b) with an air gap (6) between a first respective end of these shanks (5a, 5b), as well as an arc section (7) which interconnects a second respective end of the two shanks (5a, 5b) with each other for conducting a magnetic flow (8) between the shanks, the arc section (7) displaying an electrically conductive coil (2) wound around same, the coil displaying connection points (3a, 3b, 11a, 11b, 11c) for said high frequency current source (4).

Abstract: An apparatus and a method for forming a localized joint in at least one structural member are provided. The apparatus includes a tool that corresponds to a joint portion of the structural member. An induction coil is disposed in the tool, and a power source is configured to energize the induction coil. A susceptor disposed between the tool and the structural member has a Curie temperature at which the susceptor becomes paramagnetic such that an electromagnetic field induced in the susceptor by the induction coil heats the susceptor to the Curie temperature for forming the joint.

Abstract: A multiple head induction sealing system includes at least two ferrite cores mounted which are channel-shaped and arranged so that the open ends of the channels are aligned either perpendicular or parallel to a workflow direction established as the objects to be heated pass beneath the unit. A litz wire coil is disposed proximate to each ferrite core which produces an electromagnetic field within the ferrite core. The ferrite cores and litz wire coil are adapted to direct the electromagnetic field toward an object to heat it.

Abstract: An apparatus for inductively heating a sleeve section, having a central holding opening for a shank of a rotary tool, of a tool holder that holds the shank in the holding opening in a press fit and releases it upon heating. The apparatus includes an induction coil arrangement with at least one induction coil, a generator that feeds the induction coil arrangement with electric current of periodically varying amplitude, and a yoke arrangement of magnetizable material, which concentrates the magnetic flux of the induction coil onto the sleeve section in a fashion distributed all around. The induction coil is axially offset from the tool holder axis of rotation, in particular substantially radially next to the axis of rotation, and does not wrap around the section. Furthermore, the induction coil includes a coil core, of magnetizable material, that is connected in a magnetically conducting fashion to the yoke arrangement.

Abstract: A delivery apparatus is provided by the invention. The delivery apparatus includes a container for holding an article to be delivered and a heater. The container includes a housing forming an interior area and an opening. The opening is provided with a size sufficient to allow movement of the article from outside the container to within the interior area, and from within the interior area to outside the container. The heater is provided for placement within the interior area for heating the article. The heater includes an electrically conductive coil for providing an electric current when exposed to a magnetic field, and an electrical resistance heating element for generating heat. The electrical resistance heating element is provided in electrical connectivity with the electrically conductive coil. A delivery apparatus assembly is provided which includes an induction range for generating a magnetic field. A heater and a method for delivering food are provided by the invention.

Abstract: An inductor for stationary induction heating of one or more components of a complex-shaped workpiece comprises a pair of inductor segments. The first inductor segment is connected to a high frequency ac power supply and the second inductor segment is magnetically coupled to the magnetic field created by the flow of ac current in the first inductor segment. Opposing partial openings in the first and second inductor segments form an opening in which the component can be inductively heated. The first and second inductor segments are alternatively configured in a mix of single turn, multiple single turns connected in parallel, or multiple turn coils in combination to reduce non-uniform induced cross sectional currents across the axial length of the component being inductively heat treated.

Abstract: A short ring is provided outside a support frame. In the short ring, eddy current is generated in such a direction as to cancel apart of a magnetic flux developed from the exciting coil when it is fed with current, which the part of the magnetic flux leaks to outside. When the eddy current is generated, a magnetic field is developed in such a direction as to cancel the magnetic field by the leaking flux, as taught by Fleming's law. The result is that unnecessary radiation by the leaking flux is prevented, and hence noise generation in other members or devices is suppressed.

Abstract: An induction heating apparatus seals a container, such as a bottle, with a non-tampering seal. The induction heating apparatus has a concentrator and a coil assembly. The coil assembly includes multiple coil devices. Each coil device includes a bobbin with a central tube and an insulated electrical conductor. The insulated electrical conductor is wound around the central tube of the bobbin and is electrically connected to an alternating current power source. The bobbin is mounted in the concentrator. When alternating current is applied to the insulated electrical conductor, an electromagnetic field is created that will induce in an aluminum foil in the non-tampering seal. The aluminum foil will be heated and the heat in the aluminum foil will be transferred to a layer of heat active polymer in the non-tampering seal, which will quickly bond the non-tampering seal to the bottle.

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.

Abstract: A method and apparatus for temperature control of an article is provided that utilizes both the resistive heat and inductive heat generation from a heater coil.

Abstract: A method and apparatus for inductively heating a work piece. An induction heating system is used to produce a plurality of magnetic fields, each magnetic field extending through a portion of the work piece to inductively heat the work piece. At least one of the plurality of magnetic fields is oriented in a direction opposite to at least one other of the plurality of magnetic fields. The induction heating system may comprise an induction heating support structure adapted to receive the core. The induction heating system may also comprise an induction heating power source, a power source controller, an induction heating cable, and/or a fluid cooling unit.

Abstract: An apparatus in the production of a package or a packaging material comprising at least one metal layer and one polymer layer, the apparatus including an inductor connectable to a high frequency current source. According to the invention, said inductor includes a core (1) of a ferromagnetically conductive material, the core displaying two shanks (5a, 5b) with an air gap (6) between a first respective end of these shanks (5a, 5b), as well as an arc section (7) which interconnects a second respective end of the two shanks (5a, 5b) with each other for conducting a magnetic flow (8) between the shanks, the arc section (7) displaying an electrically conductive coil (2) wound around same, the coil displaying connection points (3a, 3b, 11a, 11b, 11c) for said high frequency current source (4).

Abstract: A cylindrical member including a cylindrical substrate and at least one coating layer thereon is formed through an applying step of applying a coating liquid on the cylindrical substrate and a drying step of drying the coating liquid that has been applied in the applying step by induction heating device to form the coating layer. The induction heating device is disposed in the interior of the cylindrical substrate. The induction heating device has an excitation coil for generating a magnetic flux in a direction perpendicular to the axial direction of the cylindrical member. The excitation coil is disposed along the inner surface of the cylindrical substrate.

Abstract: The invention is of a portable stripping head induction heating system and associated method of use thereof which system and method is useful in heating metallic components to which protective coatings or linings are applied for enabling their easy removal.

Abstract: An induction heating and melting system uses a crucible formed from a material that has a high electrical resistivity or high magnetic permeability, and one or more inductor coils formed from a wound cable consisting of multiple individually insulated copper conductors to form an induction furnace that, along with its associated power supply, provides a compact design. The system components are air-cooled; no water-cooling is required. The crucible may alternatively be shaped as a tunnel or enclosed furnace.

Abstract: A device for heating a roll in a paper or paperboard machine or in a finishing machine for paper or paperboard the device including a profiling induction heater (5) which is arranged to heat the roll (3) with a power dependent on the location of the point to be heated in the axial direction of the roll, and a non-profiling induction heater (4) which, to provide basic heating, is arranged to heat the same roll (3) with a heating power which is substantially even over the width of the roll (3). The profiling induction heater (5) and the non-profiling induction heater (4) are placed in the same support structure (1) outside the roll (3). The roll (3) is a calender roll.

Abstract: The invention relates to a coil to be used in transverse flux induction heating of an object in the form of a metal strip or another elongate metal workpiece. The coil contains at least one pair of loops of conductors, which are non-symmetrically positioned to each other and the conductors overlap each other so that the inductor has double conductors across the object to be heated and a single conductor parallel to the object to be heated at the edges. The heating effect is prevented alone in the conductors by dividing the induced current for the conductors to two equal branches each having the same width as the original current and the combined heating effect in the branches is only half of the heating effect before branching.

Abstract: A method of heating water comprises providing a helical passageway in juxtaposition a metal core rod and a coil through which an alternating current is passed. The alternating current generates an alternating longitudinal magnetic field that passes through the metal core rod and gives rise to eddy currents that generate heat. Water flowing along a helical passageway is heated and at the same time the water is magnetized as it cuts across lines of magnetic force of the alternating longitudinal magnetic field. A magnetized water generator for uses with the method comprises two bulkheads, a coil, a metal core rod and an outer tube. The core rod is disposed within the outer tube to create a helical passageway. The outer tube and core rod are disposed within the coil. A bulkhead is disposed on each end of the outer tube. Water enters the helical passageway through the water inlet in one end bulkhead and out of the helical passageway via a water outlet on the other end bulkhead.

Abstract: A fixing device uses induction heating for causing alternating current to pass through an electromagnetic induction coil, whereby the fixing device is provided within an endless member such as a roller. The fixing device includes a core having a curved surface. The fixing device also includes the coil which is wound around a first axis on the surface of the core, so as to cover the surface of said core. The fixing device further includes a heat resistant bundling band that is wound on the coil around a second axis substantially perpendicular to the first axis, so as to fix the coil to the core.

Abstract: A fixing device for an electrophotography system, which is capable of efficiently and uniformly heating an object to be heated, which has a coil capable of being easily produced and which is capable of being stably fixing a fixed material, is provided by preventing the distance between the going and returning portions of a certain turn of the coil from being too close to each other, by preventing the diameter of the coil from changing when the coil is wound, by providing a uniform gap between the coil and the inside surface of the heating roller over the whole length, by preventing the fixing performed by the heating roller to be affected by the turning ON/OFF of a power supply, by preventing noises from being generated from the coil ejecting portion, and by devising the procedure for efficiently winding the coil.

Abstract: A method and apparatus for heating specimens in wells of a metallic specimen carrier. The specimen carrier is heated by applying resistive heating directly to the carrier. An AC source and transformer may be used where the specimen carrier is in series with a single turn secondary winding of the transformer. A magnet may be placed in each well and excited by the heating current to provided a stirring effect.

Abstract: A raw tire-preheating method and apparatus for preheating a raw tire uniformly over all the areas with a reduced running cost. The raw tire-preheating apparatus comprises a tread section-preheating mechanism (16) including a front coil (21) disposed so as to face a tread section (4a) for generating a high frequency magnetic field and for applying it to the tread section (4a); and a core mechanism consisting of center cores (24), separation cores (25) and side cores (26) for providing an intensity distribution of the high frequency magnetic field that the tread section (4a) is uniformly preheated overall in the tire width direction. A movement mechanism for moving at least one of the tread section-preheating mechanism (16) and the raw tire (4) is provided in order to move the tread section-preheating mechanism (16) relative to the tread section (4a).

Abstract: The invention concerns an induction system for heating, re-heating and keeping warm a food container combining an armature beneath the container, an induction device supporting the container optimised for the safety of the user, the electromagnetic compatibility, and preserving the induction device since the induction is activated only in the presence of an appropriate armature.

Abstract: A fixing device includes a heat applying coil formed by winding a wire around the circumference of a coil supporting member disposed along the inside of the cylindrical fixing roller, for heating the fixing roller by inducing an induced current therein, and a pressing roller which forms a nip portion with the fixing roller, and conveys a transfer material gripped by the nip portion between the fixing roller and the pressing roller, thereby fixing a toner image formed on the transfer material by heat energy given from the fixing roller. The heat applying coil is formed by winding a wire so as to have a shape which has parts parallel to the longitudinal direction of the coil supporting member and parts lying along the circumference of the coil supporting member. The winding density of the latter parts is higher than that of the former parts.