| Patent application number | Description | Published |
|---|
| 20090047033 | FIXING DEVICE FOR COLOR IMAGE FORMING APPARATUS AND CONTROL METHOD - A fixing device of the invention switches ON a heater lamp of the press roller in a fixing device in a color print mode. In a monochromatic mode, power comparable to the power consumption of the heater lamp can be supplied additionally to an exciting coil on the heat roller side when a heater lamp 3 stays OFF. An amount needed for the heat roller can be therefore added flexibly to the exciting coil. During a warm-up, power comparable to power consumption of the option can be supplied additionally to the exciting coil on the heat roller side. | 02-19-2009 |
| 20090067899 | FIXING DEVICE AND IMAGE FORMING APPARATUS - According to an aspect of the invention, a fixing device includes, a fixing member that fixes an image onto a sheet, a satellite member arranged parallel to the fixing member with respect to an axial direction and having a smaller heat capacity than the fixing member, an endless belt laid over the fixing member and the satellite member, and a pressurizing member facing the fixing member and forming a nip via the endless belt. | 03-12-2009 |
| 20100034567 | FIXING DEVICE AND IMAGE FORMING APPARATUS - To provide a technique for reducing waste of thermal energy in a fixing device. The fixing device includes: a heating rotational unit configured to heat a sheet on which a toner image is formed; a pressing rotational unit configured to come into press contact with the heating rotational unit to form a nip between the heating rotational unit and the pressing rotational unit and nip and carry the sheet in cooperation with the heating rotational unit; a heating device configured to heat the heating rotational unit; and a heat accumulating unit configured to cover at least a range above at least one of the heating rotational unit and the pressing rotational unit. | 02-11-2010 |
| 20100111555 | FIXING DEVICE FOR COLOR IMAGE FORMING APPARATUS AND CONTROL METHOD - A fixing device switches ON a heater lamp of the press roller in a fixing device in a color print mode. In a monochromatic mode, power comparable to the power consumption of the heater lamp can be supplied additionally to an exciting coil on the heat roller side when a heater lamp | 05-06-2010 |
| 20110091250 | FIXING APPARATUS OF IMAGE FORMING APPARATUS - A fixing apparatus of an embodiment of the invention includes an auxiliary pressure member to press a belt to a heat roller side. A belt mechanism to integrally support the belt and the auxiliary pressure member is rotated so that the belt is spaced from the heat roller except for a necessary time. The temperature gradient characteristic of the surface temperature of the heat roller is compared with a reference temperature gradient characteristic, and a correction value of power supplied to a coil is estimated. The correction value is added to the supply power obtained from the detection result of a sensor, and control power for controlling an inverter drive circuit is obtained. | 04-21-2011 |
| 20110158713 | FIXING DEVICE FOR IMAGE FORMING APPARATUS - A fixing device according to an embodiment of the invention is provided with a center coil and a side coil to induction heat a metal roller which supports a belt. An auxiliary pressurizing member which is adjacent to an opposing roller which supports the belt and presses the belt against a heat roller is provided. The distance from the center position of induction heating of a heat roller to an entrance of a nip is equalized to the distance from the center position of induction heating of the metal roller to the entrance of the nip. The distance from the temperature reading position of the heat roller to the center position of induction heating of the heat roller is equalized to the distance from the temperature reading position of the belt to the center position of induction heating of the metal roller. | 06-30-2011 |
