Patent application number | Description | Published |
20130034361 | IMAGE HEATING APPARATUS - An image heating apparatus includes a coil; a heating member; magnetic cores arranged in a widthwise direction of the heating member; a moving mechanism; and a controller. The controller controls, depending on a recording material size, the moving mechanism so that the cores located outside the cores in a set range with respect to the widthwise direction are moved away from the heating member. When the recording material of a size is conveyed to the image heating apparatus, the controller controls the moving mechanism so that the cores, of the cores in the set range, located outside a recording material passing range with respect to the widthwise direction are only the cores located at end portions of the set range with respect to the widthwise direction. | 02-07-2013 |
20130034362 | IMAGE HEATING APPARATUS - An image heating apparatus includes: a coil; a heating member; magnetic cores; a moving mechanism for moving the magnetic cores; a controller; and a temperature sensor, movable in a widthwise direction of the heating member, for detecting a temperature of the heating member. The temperature sensor is controlled so as to be provided at a set position of an end portion of a set range with respect to the widthwise direction. When the temperature detected by the temperature sensor is increased up to a predetermined temperature, the moving mechanism is controlled so that the magnetic core located at the end portion of the set range with respect to the widthwise direction is moved away from the heating member. | 02-07-2013 |
20130058672 | IMAGE HEATING APPARATUS - An image heating apparatus includes a rotatable heating member for heating an image on a recording material in a nip; a nip-forming member for forming the nip together with the heating member; a rotatable rubbing member for rubbing the heating member; a temperature sensor for detecting a temperature of the heating member; a moving mechanism for moving the rubbing member from a position where it is spaced from the heating member to a position where it rubs a surface of the heating member; and a controller for executing, by moving the rubbing member to the position where it rubs the surface of the heating member, a rubbing operation such that the rubbing member rubs the surface of the heating member. The controller executes the rubbing operation depending on the temperature detected by the temperature sensor when the recording material passes through the nip. | 03-07-2013 |
20130129364 | IMAGE FORMING APPARATUS - An image heating apparatus includes a heating roller; a nip forming member for forming the nip with the roller; a sheet jam sensor; a first controller for interrupting a heating operation when the sensor detects the sheet jamming, and for resuming the heating operation after the jamming is cleared; a rubbing member for rubbing a heating roller surface; a moving mechanism for moving the rubbing member to a position for spacing the rubbing member from the roller to a position for rubbing the roller surface; and a second controller for executing an operation of moving the rubbing member to the rubbing position to rub the heating roller surface when a predetermined condition is reached, wherein the second controller delays, when the condition is reached during a period in which a predetermined count of sheets pass the nip after the jam clearance, the moving operation to after the period. | 05-23-2013 |
20130142532 | IMAGE FORMING APPARATUS - An image forming apparatus is configured to be able to switch a target temperature of an image heating member from a standby target temperature during a standby state in which a pressurizing member is separated from the image heating member to a first target temperature or a second target temperature which is lower than the standby and first target temperatures. The image forming apparatus controls a contacting/separating mechanism such that a time from when an image forming signal is input until when the pressurizing member in the standby state contacts the image heating member and forms a nip is shorter in a case when the target temperature of the image heating member is the second target temperature than in a case when the target temperature of the image heating member is the first target temperature. | 06-06-2013 |
20130164015 | FIXING DEVICE - A fixing device includes: a rotatable fixing member configured to fix at a nip a toner image formed on recording paper; a rotatable pressing member configured to form the nip between itself and the rotatable fixing member; and a controller configured to control a temperature of the rotatable pressing member depending on smoothness of the recording paper. | 06-27-2013 |
20130206745 | IMAGE HEATING APPARATUS - An image heating apparatus includes a image heating roller in a nip; a nip forming member; a heating roller rubbing roller; a moving mechanism for moving the rubbing roller between a spaced position and a rubbing position; and a controller for executing operations in first and second modes. In the first mode, the heating roller is rotated with the rubbing roller in the spaced position and the heating roller in contact with the nip forming member with a target temperature of the heating roller higher than that of the nip forming member. In the second mode, the rubbing roller is contacted with the heating roller rubbing the surface of the heating roller. The temperature difference in the first mode between the target temperature of the heating roller and that of the nip forming member is larger than the temperature difference when the toner image is heated by the nip. | 08-15-2013 |
20130272761 | FIXING APPARATUS - With a fixing apparatus, a shape of a folded portion on the side of a pressure roller of a sliding contact sheet is folded along a shape of the pressure roller, thereby uniformizing a longitudinal pressure distribution and preventing an uneven-gloss image due to pressure reduction. | 10-17-2013 |
20150037055 | IMAGE FORMING APPARATUS - An image forming apparatus includes image forming means for forming an image on a sheet; fixing means for fixing an image formed on a sheet; detecting means for detecting a temperature of the fixing means; and controlling means for controlling an image formation start timing in accordance with an output of the detecting means, wherein in an operation of continuously forming images on a plurality of predetermined sheets, when a number of image formations is not less than a predetermined number, start of the image formation is delayed until a temperature of the fixing means rises up to a first temperature, and when the number of image formations is less than the predetermined number, the image formation is started when the temperature of the fixing means rises up to a second temperature which is lower than the first temperature. | 02-05-2015 |