Patent application number | Description | Published |
20100119244 | IMAGE FORMING APPARATUS - When jam occurs in one of a tandem conveyance path and bypass conveyance path, a sheet is automatically discharged from the conveyance path where no jam has occurred. A sheet retained at the upstream side with respect to a first fixing device in a sheet conveying direction is automatically discharged to the outside of an image forming apparatus by using the conveyance path where no jam has occurred. After the automatic discharging of the sheet is completed, a user is prompted to remove the jammed sheet. | 05-13-2010 |
20100322667 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image heating member for heating a toner image formed on a recording material; a pressing member for pressing said image heating member to form a nip in which the recording material is to be nipped and conveyed; contact-and-separation device for permitting contact and separation between said image heating member and said pressing member; an executing portion for executing a stand-by state in which said image heating member and said pressing member are separated with a first distance therebetween and said image forming apparatus is ready for input of an image forming signal; a recording material detecting means for detecting the recording material present in the nip when an image forming operation is stopped; and a contact-and-separation device control portion for controlling an operation of said contact-and-separation device so that said image heating member and said pressing member are separated with a second distance therebetween larger than the first distance at least when said recording material detecting device detects the recording material present in the nip. | 12-23-2010 |
20120027444 | IMAGE HEATING APPARATUS - An image heating apparatus includes image heating device; pressing device; a first temperature sensor; an electric power supply controller; a second temperature sensor; a first cooling device for cooling a surface of the image heating device; a second cooling device for cooling a surface of the pressing device; contact-spacing device for establishing a contact state in which the image heating device and the pressing device are contacted with each other and a spaced state in which the image heating device and the pressing device are spaced from each other; an executing portion for executing a first cooling mode operation in which at least one of the cooling device is operated while rotating the image heating device and the pressing device in the contact state and a second cooling mode operation in which the first cooling device and the second cooling device are operated while rotating the image heating device and the pressing device in the spaced state; and a selector for selecting the first cooling mode or the second cooling mode on the basis of an output of the second temperature sensor. | 02-02-2012 |
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 |
20130287460 | FIXING APPARATUS - A fixing apparatus includes: a rotatable fixing member and a rotatable pressing member which are configured to fix a toner image on a sheet at a nip therebetween, wherein the rotatable fixing member has a first toner parting layer formed of a fluorine-containing resin material, and the rotatable pressing member has a second toner parting layer formed of a fluorine-containing resin material in which an electroconductive filler is contained; and a contact member provided contactable to the second toner parting layer and being electrically grounded. The second toner parting layer has surface resistivity lower than that of the first toner parting layer and has a thickness smaller than that of the first toner parting layer. | 10-31-2013 |