Abstract: A fixing device that fixes a toner image to a medium, includes: a heating body rotatably supported; an auxiliary heating member disposed along an inner surface of the heating rotation body; a temperature sensor facing the inner surface via the auxiliary heating member; a first elastic body configured to press, via a first force, the temperature sensor against the inner surface; and a second elastic body configured to press, via a second force, a sliding member against the inner surface. A product of a distance from a center of the auxiliary heating member to the first elastic body and the first elastic force is equal to a product of a distance from the center to the second elastic body and the second elastic force.

Abstract: An image processing apparatus includes a heating device a temperature sensor, and a controller. The heating device includes a rotator, a fan, an introduction duct, a cooling duct, and a movement mechanism. The introduction duct is shaped such that an airflow generated by the fan is directed towards and is incident on a first end portion of the rotator. The cooling duct extends between the introduction duct and a first end of the rotator, and faces the first end portion. The cooling duct includes a plurality of duct portions. The movement mechanism is configured to move the fan, the introduction duct, and at least one of the duct portions along the rotational axis. The temperature sensor is configured to detect a temperature at the first end portion. The controller is configured to control a movement of the movement mechanism based on a temperature detected by the temperature sensor.

Abstract: According to one embodiment, a fixing device fixes a toner image formed on a medium to the medium. The fixing device includes a heating rotator which is rotatably supported, an auxiliary heating member which is disposed along an inner circumferential surface of the heating rotator, and swings as the heating rotator rotates, a lubricant supply member which is disposed at a position on which the swing auxiliary heating member abuts, and is impregnated with a lubricant, and a pressing rotator which abuts on the heating rotator, and forms a nip portion through which the medium passes.

Abstract: According to one embodiment, a fixing device fixes a toner image formed on a medium to the medium. The fixing device includes a heating rotator which is rotatably supported, an auxiliary heating member which is disposed along an inner circumferential surface of the heating rotator, and swings as the heating rotator rotates, a lubricant supply member which is disposed at a position on which the swing auxiliary heating member abuts, and is impregnated with a lubricant, and a pressing rotator which abuts on the heating rotator, and forms a nip portion through which the medium passes.

Abstract: According to one embodiment, a fixing device includes a heating rotating body having an first arched portion so that a first circular arc is formed in a cross section configured to rotate to be pressed against a medium so as to heat toner on the medium and an auxiliary heat-generating member having a second arched portion so that a second circular arc is formed in the cross section, the second arched portion being smaller than the first arched portion, configured to be supported at one end by a support member so as to be movable inside the heating rotating body and configured to contact with the first arced portion of the heating rotating body, the contact portion between the first arched portion and the second arched portion being closer to the support member than a middle point of the second circular arc in the cross section.

Abstract: To provide a photopolymerization sensitizer which will not cause problems of dusting or coloring of a cured product by bleeding of additives such as the photopolymerization sensitizer on the surface e.g. by blooming at the time of photo-curing or during storage of the cured product, and which imparts a practically sufficient photo-curing rate. An oligomer of a 9,10-bis(substituted oxy)anthracene compound having repeating units represented by the following formula (1): wherein n represents a repetition number and is from 2 to 50, each of X and Y which may be the same or different, is a hydrogen atom, a C1-8 alkyl group or a halogen atom, and A is a bivalent substituent.

Abstract: To provide a photopolymerizable composition which can be quickly cured by light of from 300 nm to 500 nm, and a cured product of which is less colored. A photopolymerizable composition comprising a compound having an anthracene skeleton represented by the following formula (1), a compound having a benzophenone skeleton and a radical polymerizable compound: wherein each of R1 and R2 which may be the same or different, is a C1-20 alkyl group, a C6-20 aryl group, an alkylcarbonyl group having a C1-20 alkyl group, an arylcarbonyl group having a C6-20 aryl group, an alkyloxycarbonyl group having a C1-20 alkyl group, or an aryloxycarbonyl group having a C6-20 aryl group, and each of X and Y which may be the same or different, is a hydrogen atom or a C1-8 alkyl group.

Abstract: In accordance with an embodiment, a fixing apparatus comprises a belt which is equipped with a conductive layer; an induction current generator which faces the belt and heats the conductive layer through an electromagnetic induction system; a magnetic material which faces the induction current generator across the belt; a measurement section which measures a state of the magnetic material; and a controller which controls a frequency applied to the induction current generator based on a measurement result of the measurement section in a case in which at least a print request is not received.

Abstract: In accordance with an embodiment, a fixing apparatus comprises a belt which is equipped with a conductive layer; an induction current generator which faces the belt and heats the conductive layer through an electromagnetic induction system; a magnetic material which faces the induction current generator across the belt; a measurement section which measures a state of the magnetic material; and a controller which controls a frequency applied to the induction current generator based on a measurement result of the measurement section in a case in which at least a print request is not received.

Abstract: To provide a photopolymerizable composition which can be quickly cured by light of from 300 nm to 450 nm, and a cured product of which is less colored. A photopolymerization sensitizer composition containing a compound represented by the following formula (1) and a compound, of which the maximum value of an absorption coefficient in a wavelength region ranging from at least 400 nm to at most 500 nm is higher than the maximum value of an absorption coefficient in a wavelength region ranging from at least 400 nm to at most 500 nm of said compound; and a photopolymerizable composition containing the photopolymerization sensitizer composition.

Abstract: In accordance with an embodiment, a fixing apparatus comprises a belt which is equipped with a conductive layer; an induction current generator which faces the belt and heats the conductive layer through an electromagnetic induction system; a magnetic material which faces the induction current generator across the belt; a measurement section which measures a state of the magnetic material; and a controller which controls a frequency applied to the induction current generator based on a measurement result of the measurement section in a case in which at least a print request is not received.

Abstract: A supporting shaft extending in the direction of A heating unit is provided on A plate. A first bracket configured to support, on the supporting shaft, a center portion in a longitudinal direction of the heating unit and allow the heating unit to move in a rotating direction and a vertical direction with respect to the plate is provided in the heating unit. Receivers are provided at both end portions in the longitudinal direction in one unit of the heating unit and A fuser unit. Inserters are provided in the other unit to be opposed to the receivers. If the fuser unit is attached to the plate, the inserters are coupled to the receivers to restrict the heating unit from moving in the rotating direction and the vertical direction.

Abstract: A supporting shaft extending in the direction of A heating unit is provided on A plate. A first bracket configured to support, on the supporting shaft, a center portion in a longitudinal direction of the heating unit and allow the heating unit to move in a rotating direction and a vertical direction with respect to the plate is provided in the heating unit. Receivers are provided at both end portions in the longitudinal direction in one unit of the heating unit and A fuser unit. Inserters are provided in the other unit to be opposed to the receivers. If the fuser unit is attached to the plate, the inserters are coupled to the receivers to restrict the heating unit from moving in the rotating direction and the vertical direction.

Abstract: To provide a photopolymerizable composition which can be quickly cured by light of from 300 nm to 500 nm, and a cured product of which is less colored. A photopolymerizable composition comprising a compound having an anthracene skeleton represented by the following formula (1), a compound having a benzophenone skeleton and a radical polymerizable compound: wherein each of R1 and R2 which may be the same or different, is a C1-20 alkyl group, a C6-20 aryl group, an alkylcarbonyl group having a C1-20 alkyl group, an arylcarbonyl group having a C6-20 aryl group, an alkyloxycarbonyl group having a C1-20 alkyl group, or an aryloxycarbonyl group having a C6-20 aryl group, and each of X and Y which may be the same or different, is a hydrogen atom or a C1-8 alkyl group.

Abstract: A fixing apparatus includes a belt including a ferromagnetic layer. A ferromagnetic plate is disposed inside the belt and has a Curie point that is lower than a Curie point of the ferromagnetic layer. An induction heater causes heat generation in the ferromagnetic layer and the ferromagnetic plate. The induction heater includes a coil. A driving circuit outputs a high frequency current to the coil, and changes the high frequency current. A temperature sensor measures a temperature of the coil. A controller controls the driving circuit to decrease the high frequency current if the temperature of the coil measured by the temperature sensor is higher than a predetermined value.

Abstract: In accordance with an embodiment, a fixing apparatus comprises a belt which is equipped with a conductive layer; an induction current generator which faces the belt and heats the conductive layer through an electromagnetic induction system; a magnetic material which faces the induction current generator across the belt; a measurement section which measures a state of the magnetic material; and a controller which controls a frequency applied to the induction current generator based on a measurement result of the measurement section in a case in which at least a print request is not received.

Abstract: According to an embodiment, a fixation device has a fixation belt, a coil, and a heat-generation auxiliary plate. The coil is opposed to the fixation belt and the heat-generation auxiliary plate and generates magnetic flux. The heat-generation auxiliary plate assists heating of a recording medium by the fixation belt. The heat-generation auxiliary plate has a magnetic layer and a non-magnetic layer formed on the magnetic layer and contacting a base layer of the fixation belt. The non-magnetic layer is harder than the base layer of the fixation belt.

Abstract: According to one embodiment, a fixing device includes a fixing belt, an induction current generating part and an auxiliary heat generation part. The fixing belt includes a conductive layer. The induction current generating part faces the fixing belt in a thickness direction. The induction current generating part heats the conductive layer by electromagnetic induction. The auxiliary heat generation part faces the induction current generating part through the fixing belt. The auxiliary heat generation part includes a magnetic member. The magnetic member includes a mesh part. The mesh part has a mesh shape when viewed from the thickness direction of the fixing belt.

Abstract: According to an embodiment, a fixation device has a fixation belt, a coil, and a heat-generation auxiliary plate. The coil is opposed to the fixation belt and the heat-generation auxiliary plate and generates magnetic flux. The heat-generation auxiliary plate assists heating of a recording medium by the fixation belt. The heat-generation auxiliary plate has a magnetic layer and a non-magnetic layer formed on the magnetic layer and contacting a base layer of the fixation belt. The non-magnetic layer is harder than the base layer of the fixation belt.

Abstract: In accordance with an embodiment, a fixing apparatus comprises a belt which is equipped with a conductive layer; an induction current generator which faces the belt and heats the conductive layer through an electromagnetic induction system; a magnetic material which faces the induction current generator across the belt; a measurement section which measures a state of the magnetic material; and a controller which controls a frequency applied to the induction current generator based on a measurement result of the measurement section in a case in which at least a print request is not received.