Abstract: A heating device (9) includes a heater (22), a holder (23), a device frame (40), a primary positioner (A), a secondary positioner (B), and a tertiary positioner (C). The heater includes a heat generator (60). The holder holds the heater. The device frame is configured to support the holder. The primary positioner is configured to position the heater and the holder in a longitudinal direction of the heater. The secondary positioner is configured to position the holder and the device frame in the longitudinal direction of the heater. The tertiary positioner is configured to position the device frame and a body of an image forming apparatus in the longitudinal direction of the heater. The primary positioner and one of the secondary positioner and the tertiary positioner are disposed on an identical side defined by a center of the heat generator in the longitudinal direction of the heater.

Abstract: A fixing belt includes, in the following order: a base material layer containing a resin; an elastic layer containing an elastic material; and a release layer, in which each of the base material layer and the elastic layer further contains an aggregate in which plural fibrous carbons are entangled with each other, a maximum diameter of the aggregate in the base material layer is 50% or less of a film thickness of the base material layer, and a maximum diameter of the aggregate in the elastic layer is 15% or less of a film thickness of the elastic layer.

Abstract: A fixing belt includes, in the following order: a resin base material layer; an elastic layer; and a release layer, in which the elastic layer contains an elastic material and an aggregate in which plural fibrous carbons are entangled with each other, and a maximum diameter of the aggregate is 15% or less of a film thickness of the elastic layer.

Abstract: According to one embodiment, a fixing device, includes a fixing member having a first surface configured to be pressed against a recording medium and a heater on a second surface of the fixing member. A first heat conducting member contacts aback surface side of the heater, and a second heat conducting member is provided to be moveable between a first state, in which the second heat conducting member is in contact with the first heat conducting member and the second surface of the fixing member, and a second state, in which the second heat conducting member is contacting the first heat conducting member, but separated from the second surface of the fixing member.

Abstract: A fixing device includes a heating and fixing rotator, a pressing rotator, a blower, a guide, an opening and closing device, and a driving device. The heating and fixing rotator is rotatable and heats an unfixed image on a recording medium to fix the unfixed image on the recording medium. The pressing rotator is rotatable, faces the heating and fixing rotator, and is pressed against the recording medium. The guide has an air blowing port and guides air sent from the blower to at least one of the heating and fixing rotator and the pressing rotator. The opening and closing device moves to open and close the air blowing port. The driving device includes a driver to move the opening and closing device and at least one member other than the opening and closing device and separately drives the opening and closing device and the at least one member.

Abstract: A fixing device includes a heater, a heater holding member, a stay sheet-metal, and a belt holding member. The stay sheet-metal includes a top plate and side plates and is configured to control a load applied to the heater holding member, the side plates extending respectively from opposite sides of the top plate in a short-length direction of the top plate, toward the heater holding member. The belt holding member holds the fixing belt such that the fixing belt can peripherally rotate, the belt holding member holding at least one end of the heater holding member in a longitudinal direction thereof and at least one end of the stay sheet-metal in a longitudinal direction thereof. The top plate of the stay sheet-metal is formed to extend to at least one end of the stay sheet-metal in the longitudinal direction thereof.

Abstract: A heater holding member circulatably guides a fixing belt and holds a heater that heats the fixing belt. A stay sheet metal reinforces the heater holding member. The heater holding member has a base plate and side walls. The stay sheet metal is placed on the base plate. A side wall is erected on either side of the base plate in a short direction thereof. A pocket which keeps the stay sheet metal is formed in each side wall. The stay sheet metal has a top plate and side plates. A side plate bends and extends from either edge of the top plate in a short direction thereof. A slit is formed in each side plate such that the side plates are kept in the pockets of the heater holding member.

Abstract: A heater includes a first heat generator and a second heat generator each of which has a hypothetical center line that divides each of the first heat generator and the second heat generator into a first section and a second section. A first conductor connects a first electrode to the first heat generator and the second heat generator. A second conductor connects a second electrode to the first heat generator and the second heat generator. A first primary connector connects the first conductor to the first section of the first heat generator. A second primary connector connects the first conductor to the second section of the second heat generator. A first secondary connector connects the second conductor to the first heat generator. A second secondary connector connects the second conductor to the second heat generator.

Abstract: An image forming apparatus includes a fixing device and a cooling device provided on a side downstream of the fixing device with respect to a sheet feeding direction. The cooling device includes a first unit including a first belt and a first roller, a second unit including a second belt for forming a nip in cooperation with the first belt, a heat sink and a second roller, and a driving motor for rotating the first roller and the second roller. The second unit is movable between a contact position where the first belt and the second belt are in contact with each other so as to form the nip and a separated position where the first belt and the second belt are in separation from each other so as to release the nip.

Abstract: Provided is a fixing device to press a printing medium. The fixing device includes a rotating member and a pressure roller disposed to face the rotating member. The pressure roller includes a first groove and a second groove that extend along an outer circumferential surface respectively from a first end portion and a second end portion of the pressure roller. The first and second grooves are inclined with respect to a rotational axis of the pressure roller.

Abstract: A fixing device includes a fixing rotator that rotates and a heat source that heats the fixing rotator. A pressure rotator contacts an outer circumferential surface of the fixing rotator. A nip former is disposed opposite the pressure rotator via the fixing rotator to form a nip between the fixing rotator and the pressure rotator. A support supports the nip former and includes a metal member. The nip former includes a resin nip forming member made of resin and a metal nip forming member made of metal and interposed between the resin nip forming member and the fixing rotator. The metal nip forming member includes a contact face disposed in at least a part of a lateral end span of the nip former in a longitudinal direction of the nip former. The contact face contacts the metal member of the support.

Abstract: Provided is an image heating apparatus including: a heater having a plurality of heating elements arranged in a direction orthogonal to a conveying direction of the recording material; and a control portion that controls electric power to be supplied to the plurality of heating elements and is capable of individually controlling the plurality of heating elements, the image heating apparatus heating an image formed on the recording material with heat by the heater, wherein the control portion sets a heating condition when controlling each of the plurality of heating elements, according to the thermal history of a heating region heated by one heating element and the thermal history of a heating region heated by a heating element adjacent to the one heating element.

Abstract: A fixing apparatus includes a rotary member including a heat-generation layer with a plurality of rings, a temperature detecting portion configured to detect a temperature of the rotary member, a conduction detecting unit configured to detect a conduction failure in an opposing ring that is one of the plurality of rings of the heat-generation layer and that opposes the temperature detecting portion, and a controller configured to control the supply of power to the magnetic field generator. The conduction detecting unit includes a first magnetic core, a second magnetic core, and a current detecting portion that includes a detection coil. A length of one of the first magnetic core and the second magnetic core around which the detection coil is wound is less than a length of another of the first magnetic core and the second magnetic core around which the detection coil is not wound.

Abstract: A heating device includes a cylindrical body with a hollow interior and a heater inside the hollow interior. A first surface of the heater faces the inner surface of the cylindrical body. A heat transfer member is on a second surface of the heater. A grease is between the heater and the heat transfer member. A support member is provided including a first portion fixed to the second surface of the heater and a second portion contacting a surface of the heat transfer member. The support member includes a third portion between the first and second portions. The third portion does not contact the second surface of the heater between the first and second portions and provides a space for grease from between the heater and the heat transfer member to accumulate.

Abstract: A novel heating device includes a heating member configured to heat a sheet on an opposite face opposite a liquid applied face. The heating member has a curved portion along which the sheet is conveyed and warped so that the liquid applied face has a concave shape.

Abstract: A fuser configured to nip a sheet by a heating member and a pressurizing member and to thermally fix an image formed in a toner on the sheet, is provided. The fuser includes a supporting member, a temperature sensor, and a sensor cover. The supporting member supports the heating member. The temperature sensor is attached to the supporting member and is configured to detect a temperature of the heating member without contacting the heating member. The sensor cover is located on a side of the temperature sensor opposite to the heating member to cover the temperature sensor. The sensor cover includes a base having an opening at an upper position with respect to the temperature sensor and a windshield wall located in adjacent to the base. The windshield wall protrudes upward and extends in a lengthwise direction for the heating member.

Abstract: An image forming apparatus includes an image forming portion, a fixing portion, and a control portion. The fixing portion forms a nip portion to nip a recording material and includes heat-generating elements along a direction orthogonal to a conveying direction of the recording material. The fixing portion fixes the image on the recording material using heat. The image forming apparatus changes a control target temperature for each heating area heated by each of the heat-generating elements in accordance with the image to be formed on the recording material. When forming the image after a jam clearing process in which the recording material nipped in the nip portion is removed, the control portion changes a distribution of a control target temperature of the whole heater in the direction in which the heat-generating elements are aligned to a second distribution different from a first distribution corresponding to the image.

Abstract: In an image heating apparatus, a region of a recording material, on which an image can be formed, is divided into a boundary region and a non-boundary region so as to correspond to a plurality of heating elements. The boundary region includes a boundary between one heating element out of the plurality of heating elements and an adjacent heating element thereof, and overlap with the one heating element and the adjacent heating element overlap in a predetermined range in the orthogonal direction. The non-boundary region overlaps with the one heating element in a range other than the boundary region. A control target temperature of a heating region that is heated by the one heating element is set to a higher temperature of a first temperature based on information corresponding to the boundary region, and a second temperature based on information corresponding to the non-boundary region.

Abstract: A device includes a rotator having a rotation axis, a belt, a belt support surrounded by the belt, and a sliding sheet configured to be pinched at the nip between an inner peripheral surface of the belt and the belt support. The belt support is configured to form a nip with the rotator. One of the belt support and the sliding sheet includes a hook engaging portion. The hook engaging portion includes an aperture. The other of the belt support and the sliding sheet includes a hook engaged to the aperture.

Abstract: The fixing device (13) includes the fixing belt (20), the pressuring roller (21) and the pad (24). The pad (24) sandwiches the belt (20) with the roller (21) to form the fixing nip. The pad (24) is extended in the nip width direction, and the pressing face (40) has the first and second curved faces (41) and (42) at upstream and downstream sides in the sheet conveyance direction. The first and second curved faces (41) and (42) are formed arch-like curved to the roller (21) toward upstream and downstream sides. The first and second curved faces (41) and (42) continue at the inflection point (B) near the intersection point of the extending line (A) parallel to the pressuring direction and through the rotation center of the roller (21) on the pressing face (40). The first curved face (41) has the curvature radius (Ra) larger than the second curved face (42).