Embodiments of an electromagnetic coil assembly are provided, as are methods for the manufacture of an electromagnetic coil assembly. In one embodiment, the electromagnetic coil assembly includes coiled magnet wire and a braided lead wire, which has a first end segment electrically coupled to the coiled magnet wire and having a second end segment. The electromagnetic coil assembly further includes an electrically-conductive member to which the second end segment of the braided lead wire is crimped.

High temperature electromagnetic coil assemblies including braided lead wires and methods for the fabrication thereof

An image heating apparatus for heating an image formed on a recording material includes a heating member having a heat-generating layer, and magnetic field-generating means for generating a magnetic field to induce an eddy current in the heat-generating layer. The magnetic field-generating means includes a core and a coil disposed around the core in a longitudinal direction of the core. When the coil has a minimum length L1 and a maximum length L2 respectively in a longitudinal direction thereof; the core has a maximum length Lc in the longitudinal direction thereof; the core and the heating layer form a gap d therebetween; and the recording material has a prescribed maximum size giving a passing width Lp; these values satisfying the following relationship: Lp + 2(2d+1) ≦ Lc ≦ L1 < L2.

Induction heating type image heating apparatus

By freely adjusting the heat generation distribution of an object to be heated, the heat generation distribution which matches a purpose can be easily obtained In an electromagnetic induction heating device including an object to be heated having at least an electromagnetic induction heat generating layer and a magnetic field generating unit which is arranged toward the electromagnetic induction heat generating layer of the object to be heated in an opposed manner and includes an exciting coil which generates a magnetic flux penetrating the electromagnetic induction generating layer, a magnetic flux adjusting member which is made to be interlinked with a portion of the magnetic flux of the exciting coil to generate an electromagnetic induction action so that the magnetic flux acting on the electromagnetic induction heat generating layer is changed is disposed in the vicinity of the exciting coil

Electromagnetic induction heating device and image recording device using the same

A fixing apparatus of the present invention for an electronic induction heating system includes a heat roller and a magnetic excitation coil that generates Joule heat within the heat roller. The fixing apparatus includes a coil positioner that positions the magnetic excitation coil around a portion of a periphery of the heat roller, a fixing roller that fixes toner image on a recording medium, and a belt that contacts a portion of a periphery of the heat roller and the fixing roller to conduct the generated heat from the heat roller to the fixing roller. The coil positioner further has a surface of first curvature substantially identical to a curvature of a periphery of the heat roller at an opposition area, the opposition area being opposite to a contact area where the heat roller makes contact with the belt. The coil positioner is spaced from the belt by a predetermined distance. The coil positioner further has a first extension extending from a first end of the opposition area of the coil positioner and a second extension extending from a second end of the opposition area of the coil positioner. The first extension and the second extension are spaced from the belt distances larger than the predetermined distance.

Fixing apparatus, image forming apparatus, wire winding apparatus and method for producing magnetic excitation coil

A spot welding tip for use in a spot welding machine includes a base portion having a longitudinal base axis that passes through a center of the base portion. A tip portion extends from the base portion and provides a contact surface. The tip portion includes a longitudinal tip axis that passes through a center of the tip portion and a center of the contact surface. The spot welding tip includes a transverse axis that is perpendicular to both the base axis and the tip axis. The base axis and the tip axis are parallel to one another and offset from one another by a length. The contact surface is angled with respect to the transverse axis by an angle.

Spot welding tip for a spot welding machine

PURPOSE:To improve the reliability of the connecting section between a magnet and lead wires by holding the terminal of the lead wire from which the coating is removed with a wire barrel in a press-contact state while the wire barrel is formed by means of an upper and lower electrodes while the terminal of the lead wire is put on a magnet wire and feeding solder to the press-contact section while the section is heated by supplying electricity through the electrodes. CONSTITUTION:While a magnet wire 33 and terminal members 31 and 32 are held by means of an upper and lower electrodes 7 and 8, electricity is supplied through the electrodes 7 and 8 so as to remove the coating of the wire 33 by fusion and solder the wire 33 to the members 31 and 32. Then, the terminal of the lead wire 34 is held by means of a wire barrel 31b in a press-contact state while the terminal of a lead wire 34 from which the coating is removed is put on the wire 33 and the barrel 31b is formed by means of the upper and lower electrodes 7 and 8. After press-contact the terminal of the lead wire 34, solder 35 is fed to the press-contact section while the press-contact section is heated by supplying electricity through the electrodes 7 and 8 and, after soldering, the power supply is stopped and the solder 35 is solidified. As a result, the magnet wire 33 and lead wire 34 are connected with each other. Therefore, the connection between the wires 33 and 34 can be performed easily but surely.

Method and device for connecting magnet wire with lead wire

PURPOSE:To weld a terminal, etc., without executing special prerepair on the conductive wire coated with the heat resistant synthetic resin of an esterimido, etc., by setting the electric resistant value of 1st and 3rd electrodes at higher value than that of a 2nd electrode. CONSTITUTION:The conductive wire 42 coated with the synthetic resin film 42b to be removed by melting with heating, for instance, and the terminal member 44 to connect it are superposed between the 1st electrode 20, 3rd electrode 22 and the 2nd electrode 21 to pinch it. With starting of electrification thereafter, a current is first passed through the route of the 3rd electrode 22 from the 1st electrode 20 by being blocked by the synthetic resin coating film 42b. At this time, the 1st electrode 20 and 3rd electrode 22 having high electric resistant value become in high temp. instantaneously with heat generation to melt the synthetic resin film 42b. With this melting, the electric insulation is destroyed and the current is passed toward the 3rd electrode 22 from the 1st electrode 20 to enable work welding.

Spot welding machine

PROBLEM TO BE SOLVED: To form a simple exciting coil stably having a precise shape corresponding to the shape of an electromagnetic induction heating member at a low cost by winding a coil shape keeping member with a coil wire material, and deforming the coil wire material with the coil shape keeping member into a required shape SOLUTION: A coil wire is spirally wound plural times with a plan view around a projecting edge 19a in the periphery of a horizontal long slit provided at a central part of a coil shape keeping member 19 so as to form a flat spiral exciting coil 18 The exciting coil 18 is pressed from both sides and over thereof by a press jig so as to increase the coil density, and while heated to a softening temperature of the coil shape holding member 19 so that the exciting coil 18 bites into the coil shape keeping member 19 for fixing the exciting coil 18, and a flat exciting coil primary forming unit 60A is thereby formed This exciting coil primary forming unit 60A is pressed by an inner die and an outer die so as to form, for example, a semicircular gutter-like shape curved toward the coil shape keeping member side

Exciting coil for heating device, manufacture thereof, heating device and image forming device

PURPOSE:To furnish a heating device for a work capable of heating the work stably in a short time and suitable for soldering work of the work. CONSTITUTION:The heating device for the work is provided with a lower side electrode 8, an upper side electrode constituted by bringing first and second electrodes into contact with each other, a pressurizer 5 which moves this upper side electrode in the direction to approach the lower side electrode 8 and separate from it and enables these electrodes to hold the work W between these, electrode holders 10, 11 and 12 to cool the respective electrodes forcibly, a transformer 20 which energizes the upper side electrode and generates heat on this based on contact resistance against cooling from the electrode holders and a foot switch 61 to operate the pressurizer 5, pressurize and hold the work W between the upper side electrode and the lower side electrode 8, operate the transformer 20 and generate heat on the upper side electrode extending for a first specified time and heat the work W. The pressurizer 5 continues a pressurizing and holding state of the work W extending for a second specified time even after the heat generation of the upper electrode is completed and at this time, the work is cooled through forced cooling of the respective electrodes by this foot switch 61.

Heating device for work

PURPOSE:To closely fit 1st and 3rd electrodes with good and large contact area and to concentrate uniform heating in the tip of the 3rd electrode at the film peeling off time by fitting and abutting the semi-circular sectional tip of the 3rd electrode into the semi-circular engaging groove of the 1st electrode CONSTITUTION:The 1st electrode 7 formed with the engaging groove of about semi-circular section whose tip is made a specified inclination for the face vertical to the shaft, the 2nd electrode 8 whose tip face is arranged in opposition by separating from the 1st electrode 7 and the 3rd electrode 9 whose one side face of the tip is abutted by engaging with an engaging groove in the specified length as the curved face in about semi-circular sectional shape with the radius of curvature smaller than that of the groove of the 1st electrode 7 and whose other side face is made the plane vertical to the shaft of the 1st electrode 7 and made the abutting face to a work are equipped with When an electrification is executed in this abutting state, the abutting part of these electrodes 7, 8 is closely fitted well over nearly the front face by an electric erosion and yet the adhesive face is of curved face, so the contact area becomes larger compared to a plane The tip of the 3rd electrode is thus heated with uniform heating

Abe Tokuyoshi

Papers

Method and device for connecting magnet wire with lead wire

Spot welding machine

Exciting coil for heating device, manufacture thereof, heating device and image forming device

Heating device for work

Electrode for spot welding machine