Patent application number | Description | Published |
20080226315 | FUSER UNIT AND IMAGE FORMING APPARATUS EQUIPPED WITH THE SAME - A fuser unit for an image forming apparatus including: a tape-like cleaning member that abuts on a fuser roller and cleans its peripheral surface; a press roller that presses the fuser roller via the cleaning member; a feed roller that feeds said cleaning member; a wind roller that winds the cleaning member therearound; and a controller that actuates a fixing function before an image formation, stops it after said image formation, and rotates and stops the wind roller and/or the feed roller to control a winding quantity of the cleaning member, wherein said controller calculates a toner image amount based on the prescribed number of pages by tracking from a page on which an image is formed just before the image formation is completed, and determines whether or not said cleaning member is wound around the wind roller during a non-fixing period based on the calculated toner image amount. | 09-18-2008 |
20080226325 | FIXING APPARATUS AND IMAGE FORMING APPARATUS - In one embodiment, a paper separation claw is separated from a surface of a pressure roller by a drive source being turned ON at a time t | 09-18-2008 |
20090285592 | FIXING APPARATUS AND IMAGE FORMING APPARATUS - In an embodiment, in a fixing apparatus provided with a plurality of fixing heaters having heat distribution characteristics that are different from each other inside a fixing roller, and an image forming apparatus provided with the fixing apparatus, an auxiliary heater is provided, the auxiliary heater being provided inside the fixing roller and to which power is distributed only during the warm-up period until the fixing roller in a lower temperature state reaches a predetermined fixing temperature. | 11-19-2009 |
20090297181 | FIXING APPARATUS - In one embodiment of the present invention, a fixing apparatus that causes a recording material to pass through a nip portion formed by a rotating heat roller and a rotating pressure roller being in contact so as to perform a fixing operation is configured including a pressing mechanism that can switch between a pressure applied state in which the pressure roller presses against the heat roller using a bias and a pressure cancelled state in which the pressure is cancelled, a pressure state detection unit, and a control unit that performs a pressure cancelation operation and a pressure application operation. If the pressure state detection unit does not detect the pressure cancelled state even when the control unit has performed pressure cancellation control for a certain time period with respect to the pressing mechanism in the pressure applied state, the control unit permits a fixing operation in only the pressure applied state after performing pressure application control for a certain time period with respect to the pressing mechanism. | 12-03-2009 |
20090297196 | FIXING APPARATUS - In one embodiment, a fixing apparatus is configured of a pressing portion for causing the pressure roller to enter a pressure applied state by applying bias, a switching portion for causing the pressing portion in the pressure applied state to enter a pressure released state by causing a cam to rotate forward, a pressure state detection portion for detecting the pressure released state, and a control portion for, when shifting from the pressure applied state to the pressure released state, turning forward the cam of the switching portion in the pressure applied state and stopping the cam after the pressure state detection portion detects the pressure released state. If the cam is turned forward with respect to the switching portion for a certain time period, but the pressure state detection portion does not detect the pressure released state, the control portion performs forward rotational direction retry control. | 12-03-2009 |
20090324307 | FIXING APPARATUS - In one embodiment, when a hot roller is driven to rotate, a driving gear rotates so that a swing gear and a swing cam rotate. Then, a sliding contact edge on the right side of a swing lever that abuts against the circumferential face of the swing cam repeatedly moves up and down, and the swing lever repeatedly rotates clockwise and counterclockwise with a shaft of a pressure release cam as the center. At this time, since only the clockwise rotation of the swing lever is transmitted via a one-way clutch to the shaft of the pressure release cam, the clockwise rotation is intermittently transmitted to the shaft of the pressure release cam. As a result of this, the pressure release cam intermittently rotates clockwise, and the pressure release cam pushes away a roller of a displacement frame, so that the pressure roller separates from the hot roller. | 12-31-2009 |
20100008704 | CLEANING APPARATUS USING WEB SHEET - A cleaning apparatus using a web sheet includes: a send-out roller that is wound with the web sheet; a take-up roller that is connected to an end of the web sheet; and a rotation-regulating and canceling portion that regulates rotation of the send-out roller and cancels the regulation according to tension of the web sheet between the send-out roller and the take-up roller; wherein the web sheet is sent out from the send-out roller and taken up by the take-up roller, the web sheet is brought into contact with another roller during the sending out and taking up operation, and extraneous matters that have adhered to the other roller are removed. | 01-14-2010 |
20100046995 | FIXING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A fixing apparatus | 02-25-2010 |