Abstract: Conveyance speed of recording materials by a fixing roller pair can be set to conveyance speed based on detected results of a recording material detection means and a loop detecting sensor, and information on the recording material that has been stored in a memory in advance, wherein the conveyance speed of the fixing roller pair is set so that loop length of the recording material will be a lower limit length, after the loop detecting sensor detects a loop of the recording material, and before the rear end of the recording material passes through the transfer roller pair.

Abstract: An image forming apparatus includes an image bearing member which bears a toner image; transfer means which forms a transfer nip portion while being in contact with the image bearing member, the transfer means which sandwiches and conveys a recording material with the image bearing member in the transfer nip portion, which transfers the toner image to the recording material; fixing means in which the recording material is sandwiched in a fixing nip portion where a first fixing member and a second fixing member are in contact with each other, the fixing means fixes the toner image to the recording material; and an electrode member which is provided between the transfer means and the fixing means, wherein the recording material is sandwiched and conveyed by the fixing means while sandwiched and conveyed by the transfer means, a length d (mm) of a shortest straight line connecting a center of the transfer nip portion and a center of the fixing nip portion in a direction in which the recording material is conveye

Abstract: A manufacturing method for an image heating apparatus for heating an image on a recording material by a heat from a heat generating element for producing heat by a magnetic flux generated by magnetic flux generating means, the apparatus including a magnetic flux confining member for confining a magnetic flux directing toward a predetermined region of the heat generating element from the magnetic flux generating means, and a first drive transmission member, provided at one end of the magnetic flux confining member, for transmitting rotational drive to the magnetic flux confining member and a second drive transmission member, provided at the other end of the magnetic flux confining member, for transmitting rotational drive to the magnetic flux confining member, the method comprising an adjusting step of adjusting such that first and second drive transmission members are supported by the magnetic flux confining member with a predetermined rotational position relation, using marks provided on the first and second

Abstract: An image forming apparatus has a fixing apparatus 9 that performs electromagnetic induction-heating due to an operation of magnetic fluxes emitted from a magnetic flux generating unit, and a high-frequency power supply circuit which supplies a high-frequency current to the magnetic flux generating unit. The high-frequency power supply circuit is disposed in a casing frame of a main body of the apparatus.

Abstract: A heating apparatus for heating a material to be heated by heat generated by induction heat generation member includes a magnetic flux generator, a holder for holding and fixing the magnetic flux generator, and an induction heating member which generates heat by electromagnetic induction heating by an action of magnetic flux generated by the magnetic flux generator. A magnetic flux adjuster adjusts an area in which magnetic flux acts on the magnetic flux generator in a longitudinal direction, of the induction heat generation member, perpendicular to a conveyance direction of a material to be heated. The magnetic flux adjuster includes a magnetic flux adjusting member capable of coming into surface contact with the holder in the longitudinal direction of the induction heat generation member and a moving element for moving the magnetic flux adjusting member by sliding the magnetic flux adjusting member on the surface of the holder.

Abstract: An image heating device includes magnetic flux generating means; a heat generating element for generating heat by a magnetic flux from the magnetic flux generating means to heat an image on a recording material; a magnetic flux confining member for confining the magnetic flux directed toward the heat generating element from the magnetic flux generating means, the magnetic flux confining member including a magnetic flux confining portion for confining the magnetic flux directed toward a predetermined region of the heat generating element at a predetermined magnetic flux confining position and a connecting portion connecting with the magnetic flux confining portion in a longitudinal direction of the heat generating element to hold the magnetic flux confining portion; and moving means for moving the magnetic flux confining member to a magnetic flux confining position or to a retracted position where the magnetic flux confining member is retracted from the magnetic flux confining position, wherein the connecting

Abstract: A fixation apparatus having a good fixability in its longitudinal direction and an image forming apparatus are provided. The fixation apparatus includes an electromagnetic induction heating member which is a hollow rotation member, and a magnetic flux generation member for causing the electromagnetic induction heating member to generate heat by generating magnetic flux in the electromagnetic induction heating member. The fixation apparatus fixes a toner image on a recording material by imparting heat energy by heat generation of the electromagnetic induction heating member to the recording material to be conveyed. The electromagnetic induction heating member has a different thickness in the longitudinal direction thereof and a uniform diameter at a surface facing the magnetic flux generation means in the longitudinal direction.

Abstract: An image heating apparatus includes a heating roller for heating an image on a recording material; a coil unit disposed in said heating roller and including a coil for induction heat generation in said heating roller; a supporting member for rotatably supporting said heating roller, wherein said supporting member including a holding portion for substantially non-rotatably holding said coil unit.

Abstract: An image heating apparatus includes magnetic flux generating means; a rotatable heat generation member for generating heat by a magnetic flux generated by the magnetic flux generating means to heat a recording material; a magnetic flux adjusting member, disposed between the magnetic flux generating means and the heat generation member, for adjusting a magnetic flux effective region for the heat generation member, with respect to a longitudinal direction which is perpendicular to a feeding direction of the recording material; moving means for moving the magnetic flux adjusting member to a predetermined magnetic flux adjusting position to adjust a temperature distribution of the heat generation member with respect to the longitudinal direction; and a drive receiving portion, disposed at opposite end portions of the magnetic flux adjusting member, for receiving a driving force from the moving means.

Abstract: The present invention relates to an image forming apparatus comprising: an operating part which operates the image forming apparatus; an optional first speaker which outputs information guiding operation of the operating part; and a second speaker which outputs sound information that is different from operation guidance information; wherein when the first speaker and the second speaker disposed such that a surface of the first speaker is directed to a front surface of the image forming apparatus that is opposed to the operating part, and a surface of the second speaker is directed to a side surface of the image forming apparatus that is different from the first speaker.

Abstract: The present invention provides an image forming apparatus including, a heating member heating an image on a recording material having a first exothermic element in which the calorific value of the central portion is larger than that of the end and a second exothermic element in which the calorific value of the end is larger than that of the central portion, a temperature detecting member for detecting the temperature of the heating member, power supply controlling device for controlling the power supply to the first and second exothermic elements so that the temperature of the heating member becomes a target temperature, a first starting mode for stopping the power supply to the first exothermic element and starting temperature rise of the heating member when reaching a preset temperature to start temperature rise of the heating member up to a target temperature capable of forming an image, a second starting mode for starting temperature rise up to the target temperature by using the fist and second exothermi