Abstract: An image forming apparatus includes a fixing device and a control unit. The fixing device includes a heating resistor formed of a positive temperature coefficient material. The control unit energizes the heating resistor with a first energization amount if a temperature of the heating resistor is lower than a predetermined temperature, and energizes the heating resistor with a second energization amount that is higher than the first energization amount if the temperature of the heating resistor is higher than the predetermined temperature.

Abstract: An image forming apparatus includes a fixing device and a control unit. The fixing device includes a heating resistor formed of a positive temperature coefficient material. The control unit energizes the heating resistor with a first energization amount if a temperature of the heating resistor is lower than a predetermined temperature, and energizes the heating resistor with a second energization amount that is higher than the first energization amount if the temperature of the heating resistor is higher than the predetermined temperature.

Abstract: An image forming apparatus includes a fixing device and a control unit. The fixing device includes a heating resistor formed of a positive temperature coefficient material. The control unit energizes the heating resistor with a first energization amount if a temperature of the heating resistor is lower than a predetermined temperature, and energizes the heating resistor with a second energization amount that is higher than the first energization amount if the temperature of the heating resistor is higher than the predetermined temperature.

Abstract: An image forming apparatus includes a fixing device and a control unit. The fixing device includes a heating resistor formed of a positive temperature coefficient material. The control unit energizes the heating resistor with a first energization amount if a temperature of the heating resistor is lower than a predetermined temperature, and energizes the heating resistor with a second energization amount that is higher than the first energization amount if the temperature of the heating resistor is higher than the predetermined temperature.

Abstract: An image forming apparatus includes a fixing device and a control unit. The fixing device includes a heating resistor formed of a positive temperature coefficient material. The control unit energizes the heating resistor with a first energization amount if a temperature of the heating resistor is lower than a predetermined temperature, and energizes the heating resistor with a second energization amount that is higher than the first energization amount if the temperature of the heating resistor is higher than the predetermined temperature.

Abstract: An image forming apparatus includes a fixing device and a control unit. The fixing device includes a heating resistor formed of a positive temperature coefficient material. The control unit energizes the heating resistor with a first energization amount if a temperature of the heating resistor is lower than a predetermined temperature, and energizes the heating resistor with a second energization amount that is higher than the first energization amount if the temperature of the heating resistor is higher than the predetermined temperature.

Abstract: An image forming apparatus includes a fixing device and a control unit. The fixing device includes a heating resistor formed of a positive temperature coefficient material. The control unit energizes the heating resistor with a first energization amount if a temperature of the heating resistor is lower than a predetermined temperature, and energizes the heating resistor with a second energization amount that is higher than the first energization amount if the temperature of the heating resistor is higher than the predetermined temperature.

Abstract: An image forming apparatus includes a fixing device and a control unit. The fixing device includes a heating resistor formed of a positive temperature coefficient material. The control unit energizes the heating resistor with a first energization amount if a temperature of the heating resistor is lower than a predetermined temperature, and energizes the heating resistor with a second energization amount that is higher than the first energization amount if the temperature of the heating resistor is higher than the predetermined temperature.

Abstract: An image forming apparatus includes a fixing device and a control unit. The fixing device includes a heating resistor formed of a positive temperature coefficient material. The control unit energizes the heating resistor with a first energization amount if a temperature of the heating resistor is lower than a predetermined temperature, and energizes the heating resistor with a second energization amount that is higher than the first energization amount if the temperature of the heating resistor is higher than the predetermined temperature.

Abstract: An image forming apparatus includes a heater to generate heat with AC power for fixing a toner image to a medium and a power supply device to supply the AC power to the heater according to a pattern corresponding to one of at least two different combinations of a control cycle and a resolution in duty ratio. The control cycle corresponds to an integer multiple of a nominal AC power cycle. The duty ratio reflects a number of nominal AC power cycles in the control cycle during which the heater is in an on state.

Abstract: A fixing device includes a circulating member, a pressure member, a pad material, a heater, a reflector, and a heat conductor. The circulating member includes an annular peripheral wall that is circularly movable. The pressure member is arranged to face an outer peripheral surface of the circulating member and forms a nip with the circulating member. The pad material abuts on an inner peripheral surface of the circulating member at a nip portion of the circulating member. The heater is arranged inside the circulating member and heats the circulating member. The reflector is inside the circulating member and reflects radiant heat of the heater to the circulating member. The heat conductor connects an area covering a pressed portion of the pad material against the circulating member. The reflector is formed of a material having higher thermal conductivity than the pad material.

Abstract: An image forming apparatus includes a print speed determination section and a print speed control section. The print speed determination section determines, on the basis of at least one of a shape, a size and a conveyance direction of a second image formed medium where image formation on the second image formed medium is conducted after image formation on a first image formed medium, whether a timing when the first image formed medium reaches a fixing section is later than a predetermined timing. The print speed control section controls, on the basis of a determination result of the print speed determination section, the timing when the first image formed medium reaches the fixing section.

Abstract: A fixing device includes a magnetic flux generation unit, an auxiliary heating body formed of material that generates heat from the magnetic flux generated by the magnetic flux generation unit, a rotatable fixing belt having opposing first and second ends in a direction of its rotational axis and a material that generates heat from the magnetic flux, a magnetic flux shield in contact with the auxiliary heating body and having first and second openings that expose the auxiliary body, the first and second openings being symmetrical with respect to a center point along the rotational axis between the first and second ends, a temperature sensor in contact with the auxiliary heating body through one of the first and second openings of the magnetic flux shield shielding member, and a driver that controls power supplied to the magnetic flux generation unit in accordance with signals from the temperature sensor.

Abstract: A fixing device includes a magnetic flux generation unit, an auxiliary heating body formed of material that generates heat from the magnetic flux generated by the magnetic flux generation unit, a rotatable fixing belt having opposing first and second ends in a direction of its rotational axis and a material that generates heat from the magnetic flux, a magnetic flux shield in contact with the auxiliary heating body and having first and second openings that expose the auxiliary body, the first and second openings being symmetrical with respect to a center point along the rotational axis between the first and second ends, a temperature sensor in contact with the auxiliary heating body through one of the first and second openings of the magnetic flux shield shielding member, and a driver that controls power supplied to the magnetic flux generation unit in accordance with signals from the temperature sensor.

Abstract: In accordance with an embodiment, a character recognition apparatus comprises a decolorization control section configured to carry out a decolorization processing for a sheet; an image reading control section configured to carry out an image reading processing for the sheet to which the decolorization processing is carried out; and a character recognition processing section configured to carry out a character recognition processing for a decolorized image read through the reading processing after the decolorization processing is carried out or for a generated image generated according to the decolorized image.

Abstract: In accordance with an embodiment, a character recognition apparatus comprises a decolorization control section configured to carry out a decolorization processing for a sheet; an image reading control section configured to carry out an image reading processing for the sheet to which the decolorization processing is carried out; and a character recognition processing section configured to carry out a character recognition processing for a decolorized image read through the reading processing after the decolorization processing is carried out or for a generated image generated according to the decolorized image.

Abstract: In accordance with an embodiment, an image forming apparatus comprises a first toner image forming section, a second toner image forming section and a transfer section. The first toner image forming section forms a first toner image with a first toner containing a metallic pigment or a pearlescent pigment. The second toner image forming section forms a second toner image with a second toner which has transparency to e identify of the first toner through the second toner. The transfer section transfers, after transferring the first toner image, the second toner image onto a medium with the second toner image at least partially overlapped on the first toner image.

Abstract: An image forming apparatus includes a fixing member to fix toner to a recording medium, a heating control part to heat the fixing member to a specified temperature, a measuring part to measure a temperature of the fixing member, and a calculation part to calculate an arrival time required until the temperature of the fixing member reaches a target temperature based on a difference between the target temperature at a warming-up end time of the fixing member and the temperature measured by the measuring part. If the arrival time is shorter than a rise time required to warm up the image forming apparatus, the heating control part starts to heat the fixing member after a specified time passes from a time when warming-up of the image forming apparatus is started.

Abstract: An image forming apparatus includes a fixing member to fix toner to a recording medium, a heating control part to heat the fixing member to a specified temperature, a measuring part to measure a temperature of the fixing member, and a calculation part to calculate an arrival time required until the temperature of the fixing member reaches a target temperature based on a difference between the target temperature at a warming-up end time of the fixing member and the temperature measured by the measuring part. If the arrival time is shorter than a rise time required to warm up the image forming apparatus, the heating control part starts to heat the fixing member after a specified time passes from a time when warming-up of the image forming apparatus is started.

Abstract: An image forming apparatus includes a fixing member to fix toner to a recording medium, a heating control part to heat the fixing member to a specified temperature, a measuring part to measure a temperature of the fixing member, and a calculation part to calculate an arrival time required until the temperature of the fixing member reaches a target temperature based on a difference between the target temperature at a warming-up end time of the fixing member and the temperature measured by the measuring part. If the arrival time is shorter than a rise time required to warm up the image forming apparatus, the heating control part starts to heat the fixing member after a specified time passes from a time when warming-up of the image forming apparatus is started.