Patent application number | Description | Published |
20100166470 | IMAGE FORMING APPARATUS AND FIXING DEVICE - According to one embodiment, an image forming apparatus includes an image forming portion to form an image on a sheet, a heating rotation portion to heat the sheet to fix the image on the sheet, and a coil to provide magnetic flux to the heating rotation portion, one end of the coil is closer to the heating rotation portion than another end of the coil in a direction of an axis of rotation of the heating rotation portion. | 07-01-2010 |
20100258557 | IMAGE FORMING APPARATUS - A heating fuser includes: a rotating member configured to heat a toner transferred onto a sheet; a first coil body configured to generate a first magnetic field for inducing eddy-current in a first area including the center in a rotation axis direction of the rotating member; second coil bodies configured to generate second magnetic fields for inducing eddy-current in second areas of the rotating member adjacent to the first area in the rotation axis direction; third coil bodies located to extend over the first and second coil bodies when viewed in a direction orthogonal to the rotation axis direction; and a driving circuit configured to drive the third coil bodies between a first state in which the third coil bodies generate magnetic fields for weakening the first magnetic field and a second state in which the third coil bodies generate magnetic fields for strengthening the second magnetic fields. | 10-14-2010 |
20110033215 | FUSER, IMAGE FORMING APPARATUS, AND FUSING METHOD - According to one embodiment, a fuser includes a rotatable heating member having a plurality of holes formed on difference areas, which are not overlapped with each other and which are the difference between an area in the rotating direction where a sheet having a first width is in contact during the conveyance and an area in the rotating direction where a sheet having a second width, different from the first width, is in contact during the conveyance, and a rotatable pressing member that is brought into contact with the rotatable heating member and conveys the sheet as nipping the sheet with the rotatable heating member. | 02-10-2011 |
20110070006 | TEMPERATURE EQUALIZING ROLLER AND FIXING DEVICE - A temperature equalizing roller includes a metal pipe, a heat pipe that is located inside the metal pipe and has a thermal expansion coefficient higher than that of the metal pipe, and a joining layer. The joining layer lies between an outer peripheral surface of the heat pipe and an inner peripheral surface of the metal pipe, joins the outer peripheral surface of the heat pipe and the inner peripheral surface of the metal pipe, and has a higher thermal conductivity than a thermal conductivity of air. | 03-24-2011 |
20110076043 | FIXING DEVICE - A fixing device includes a belt that has an endless shape, a roller that forms a nip with the belt, a support member that supports the belt interposed between the support member and the roller, a coil that generates a magnetic field for inducing current in the belt, an auxiliary heat generation member that generates heat with the current induced by the magnetic field in the loop of the belt, and a temperature sensor that is opposed to the auxiliary heat generation member with the belt interposed between the element and the auxiliary heat generation member and detects the temperature of an outer peripheral surface of the belt. | 03-31-2011 |