Abstract: When an image forming apparatus, after a feeding error of a recording material occurs in a fixing device, re-forms on the recording material an image corresponding to image data which image was formed on a sheet which caused the feeding error, an image forming condition is caused to be different from an operation condition used when the feeding error has occurred. This makes it possible to prevent a JAM corresponding to the same image from recurring in the fixing device.

Abstract: An image heating apparatus is provided that enables the entire width of a heat-producing medium to be heated uniformly and an excessive rise in temperature to be prevented, without making the configuration complex. In a fixing unit 19 in which this apparatus is applied, a fixing belt 112 is an annular member that has an inner peripheral surface and an outer peripheral surface, and produces heat through the action of magnetic flux. An exciting coil 120 is located in proximity to the outer peripheral surface of fixing belt 112, and generates magnetic flux that acts upon fixing belt 112. A suppression member 650 is located in proximity to inner peripheral surface of fixing belt 112, and reduces, of the magnetic flux generated by exciting coil 120, magnetic flux that acts upon a paper non-passage area of fixing belt 112.

Abstract: The present invention relates to an image forming apparatus that enables the occurrence of print defects due to a first print start time delay to be eliminated without using a temperature sensor that has a small thermal time constant. When the temperature of a fixing belt serving as an image heating body is greater than or equal to a predetermined temperature following the elapse of a fixed time after an image forming operation is started, recording paper is transported to a nip area (fixing area) of a fixing apparatus before the temperature detected by a temperature sensor reaches a predetermined image fixing temperature, and an image forming operation is started immediately.

Abstract: Disclosed herein is a peripheral device connected to an electronic device via an interface cable for exchanging first data with the electronic device via the interface cable based on a general interface standard. The peripheral device includes a radio communication section configured to perform radio communication with an outside and exchange second data relating to the radio communication with the electronic device via the interface cable based on the general interface standard.

Abstract: There is provided an image forming apparatus involving wet fixing that causes no bleeding and coagulation of toner and eventually no disturbance of toner image as a result of application of a fixing fluid, generates no curling or wrinkles in a recording medium, and can fix toner with large adhesion on a recording medium through which the fixing fluid hardly permeates. An image forming apparatus includes a toner image forming section, an intermediate transfer section, a transfer section, a fixing fluid applying section, a transport section, a fixing section, a recording medium feeding section, and a recording medium detection section. In the image forming apparatus, control of application amount of a fixing fluid to a recording medium is performed by the fixing fluid applying section based on the result obtained by the recording medium detection section for the recording medium such as thickness and material.

Abstract: In a fixing apparatus including a regulating member which regulates the position of an external heating belt in a rotation axis direction, the external heating belt includes a base material made of polyimide having a tensile strength of 300 MPa or more and a thickness of 50 ?m to 200 ?m, and a releasing layer. In the base material, 5 to 25 parts by weight of graphite is dispersed in 100 parts by weight of polyimide. With this, it is possible to improve the durability of the external heating belt and adequately secure the life of the external heating belt.

Abstract: Disclosed herein is an antenna device including, a radiator having a feeder, and a planar reflector spaced from the radiator in a radio wave incoming direction, the reflector having at least one slit defined in a side edge thereof.

Abstract: A fixing apparatus includes: a fixing roller and a pressure roller which transport a recording paper while sandwiching the recording paper P therebetween so that an unfixed toner image formed on the recording paper is fixed thereon under heat and pressure; two support rollers; an endless belt which is set over the support rollers and comes into contact with a surface of the fixing roller; and heater lamps which are provided respectively inside the support rollers. A fixing apparatus satisfies a relationship indicated by (C2+C3)/C1?2 where C1 is a heat capacity of each of the heater lamps, C2 is a heat capacity of each of the support rollers, and C3 is a heat capacity of the endless belt in each of areas where the endless belt is in contact with the support rollers. This realizes an external belt heat fixing apparatus which suppresses (a) heat damage to the endless belt and the surface of the fixing member and (b) unevenness of an image.

Abstract: In a fixing apparatus and an image forming apparatus of the present invention, an external heating section is provided that includes: an external heating belt; two heat rollers suspending the external heating belt and pressed against a fixing roller via the external heating belt; and a release/contact mechanism for causing the two heat rollers to separate from or contact with the fixing roller. With the heat rollers separated from the fixing roller by the release/contact mechanism, the external heating belt and the fixing roller are in contact with each other and the external heating belt follows rotation of the fixing roller. As a result, a fixing apparatus is provided that includes an external release/contact mechanism that can quickly operate in a small space and at low power without encouraging deterioration of the belt member. An image forming apparatus provided with such a fixing apparatus is also provided.

Abstract: An image forming apparatus includes a toner-image forming section, an intermediary transfer section including an intermediary transfer belt, a fixing-fluid applying section, a transferring and fixing section, a recording-medium supply section, and an ejection section. The fixing-fluid applying section includes a coating roller, an eccentric cam for moving the coating roller approachably and separably with respect to the intermediary transfer belt, a contact and release detecting section for detecting whether the coating roller is contacted by or away from the intermediary transfer belt, a rotational driving section for rotatably driving the coating roller, and a control unit for controlling the eccentric cam and the rotational driving section.

Abstract: An image forming apparatus capable of applying an adequate amount of fixing fluid to an unfixed toner image and producing high-quality images having high resolution and high image density with stability for a longer period of time while protecting the interior thereof against fixing fluid leakage and achieving reduction in fixing fluid consumption is provided. In an image forming apparatus, a fixing fluid is applied to a toner image on an intermediary transfer belt by a coating roller, and the toner image in a swollen/softened state is fixed onto a recording medium. By a second seal member composed of a film-shaped member and a supporting member, a gap between the coating roller and a fixing fluid chamber which has the opening and places the coating roller therein is closed to avoid leakage of the fixing fluid.

Abstract: Support rollers suspending an endless belt are arranged so that a distance between each support roller and a fixing roller is smaller than a height of a belt regulating member provided on each side of the support roller in moving the support rollers to the second position which allows the endless belt to be in contact with the fixing roller so that a contact area therebetween is smaller than in the first position. As a result, in a fixing apparatus which includes the regulating member for regulating a position of an external heating belt in a rotational axis direction so that a contact area size between the external heating belt and the fixing member is variable, it is possible to appropriately vary the contact area between the belt and the fixing material.

Abstract: An image forming apparatus includes a toner image forming section, an intermediate transferring section, a transferring section, a fixing solution applying section, a transporting section, a fixing section, and a recording medium feeding section. In the image forming apparatus, the fixing solution applying section includes a droplet supplying section, a recording medium detecting section, and a control unit, wherein the recording medium is heated before or at the same time when the fixing solution is applied to the recording medium by the fixing solution applying section, and a size of droplets of the fixing solution supplied to the recording medium is controlled based on the type of the recording medium.

Abstract: An image forming apparatus includes a toner image forming section, an image carrying section, a transferring section, a recording material conveying section, a heat fixing section, a wet fixing section, and a recording material supply section. In the image forming apparatus, a surface temperature of fixing roller in the heat fixing section is detected by a temperature sensor and according to a detected result, the recording material conveying section selects either one of the heat fixing section and the wet fixing section as a conveyance destination for a recording material carrying an unfixed toner image.

Abstract: An antenna for receiving electromagnetic waves in a desired frequency band, includes a radiating conductor and a ground conductor, a feeder part, a wavelength-shortening section, and a magnetic field applying section. The radiating conductor and a ground conductor resonate at a resonance point frequency. The feeder part is configured to feed the radiating conductor with electricity. The wavelength-shortening section in which a magnetic body having both a dielectric property and a magnetic property is disposed close to the radiating conductor shifts the resonance point frequency into a band lower than the desired frequency band by a wavelength-shortening effect obtained based on the dielectric property and the magnetic property. The magnetic field applying section is configured to apply a magnetic field to the magnetic body so as to reduce a magnetic loss due to the magnetic body.

Abstract: The present invention relates to an image forming apparatus that enables the occurrence of print defects due to a first print start time delay to be eliminated without using a temperature sensor that has a small thermal time constant. When the temperature of a fixing belt serving as an image heating body is greater than or equal to a predetermined temperature following the elapse of a fixed time after an image forming operation is started, recording paper is transported to a nip area (fixing area) of a fixing apparatus before the temperature detected by a temperature sensor reaches a predetermined image fixing temperature, and an image forming operation is started immediately.

Abstract: An image heating device according to an embodiment of the present invention includes a heat generator that has an outer surface and that generates heat by induction heating and a heater positioned close to the outer surface of the heat generator, the heater being configured to heat the heat generator by induction heating. A positioner is located close to an end of the heater, the positioner being configured to position the heater with respect to the heat generator. A vibration absorber is attached to the positioner and is configured, in one embodiment, to viscoelasticly absorb vibration of the heater produced by a vibration caused by an electromagnetic repulsive force acting between the heat generator and the heater when the heater heats the heat generator by induction heating.

Abstract: A developing device includes an endless belt stretched around a plurality of support members, a portion of a peripheral surface of the endless belt contacting a portion of a surface of an image carrying member at a contact region, the endless belt being rotated by a driving force transmitted from a driving device at a driving transmission position, and a layer regulating member pressed against a portion of the endless belt at a pressure contact region positioned upstream, with respect to the endless belt's rotation direction, from the contact region. Further provided is a load device applying, to at least a portion of the endless belt between the pressure contact region and the contact region, which is positioned upstream, with respect to the endless belt's rotation direction, from the driving transmission position, a load acting in a direction opposite to the rotation direction of the endless belt.

Abstract: An image heating apparatus is provided that enables the entire width of a heat-producing medium to be heated uniformly and an excessive rise in temperature to be prevented, without making the configuration complex. In a fixing unit 19 in which this apparatus is applied, a fixing belt 112 is an annular member that has an inner peripheral surface and an outer peripheral surface, and produces heat through the action of magnetic flux. An exciting coil 120 is located in proximity to the outer peripheral surface of fixing belt 112, and generates magnetic flux that acts upon fixing belt 112. A suppression member 650 is located in proximity to inner peripheral surface of fixing belt 112, and reduces, of the magnetic flux generated by exciting coil 120, magnetic flux that acts upon a paper non-passage area of fixing belt 112.

Abstract: An image forming apparatus is provided in which a toner is prevented from flowing and being agglomerated, at the time of application of a fixer fluid to a toner image so as to fix the toner image to a recording medium, and the recording medium is prevented from generating curl and wrinkle, and consumption of the fixer fluid and electricity can be reduced, and even a multicolored toner image can be fixed for a relatively short time. An image forming apparatus includes a toner image forming section, an intermediate transfer section, a secondary transfer section, a heating section, a fixer fluid applying section, and a recording medium supplying section. A recording medium carrying the toner image on a surface thereof is heated by the heating section and then, a fixer fluid is applied to the toner image by the fixer fluid applying section so that the toner image is fixed.