Patent application number | Description | Published |
20100189478 | FIXING DEVICE AND IMAGE FORMING APPARATUS - An image forming apparatus includes a fixing device. The fixing device includes a heating member and a pressing member that form a fixing nip, an approach guide positioned an upstream in a recording-medium conveyance direction of a fixing nip, a fixing-pressure-changing mechanism designed to change the fixing device between a high-pressure mode and a low-pressure mode, and an approach-guide-changing mechanism designed to change an angle of the approach guide in conjunction with the changing by the fixing-pressure-changing mechanism. | 07-29-2010 |
20110243607 | FIXING APPARATUS AND IMAGE FORMING APPARATUS - A fixing apparatus includes: a heating rotator, a pressurizing rotator and a fixing housing. The heating rotator is configured to be rotatable about a first rotational axis and has a peripheral surface heated by a heat source provided inside or outside of the heating rotator. The pressurizing rotator is configured to be rotatable about a second rotational axis parallel to the first rotational axis. The pressurizing rotator forms a fixing nip in conjunction with the heating rotator. The fixing housing is configured to accommodate the heating rotator and the pressurizing rotator. The heating rotator, the pressurizing rotator and the fixing housing form a fixing rotator unit. The fixing rotator unit is configured to be withdrawable from an apparatus main body of an image forming apparatus and such that the peripheral surface of the heating rotator is exposed when the fixing rotator unit is withdrawn from the apparatus main body. | 10-06-2011 |
20120114346 | IMAGE FORMING APPARATUS - An image forming apparatus includes a fixing device that has: a fixing roller heated by induction and a pressing roller brought into press-contact with the fixing roller to fix a toner image borne on a paper sheet conveyed toward the fixing device by a conveyor unit. When a paper sheet having a width smaller than a width of a maximum-width recording medium that can be passed through the fixing device is passed through the fixing device, a non-paper passing region is formed at each end portion of each of the fixing and pressing rollers. Sirocco fans cool the non-paper passing region at a part of an outer peripheral surface of the pressing roller. The pressing roller is disposed opposed to the outer side of the main body of the image forming apparatus. | 05-10-2012 |
20140339763 | FIXING DEVICE, IMAGE FORMING APPARATUS, AND SHEET DETECTING MECHANISM - A fixing device includes a sheet detecting mechanism configured to detect a sheet. The sheet detecting mechanism includes an actuator, a link member, and a detecting part. The actuator swings by being pushed by the sheet. The link member swings in conjunction with the swing of the actuator. The detecting part detects the swing of the link member. When a shift of a position of the actuator with respect to the detecting part is caused, the actuator slides with respect to the link member to absorb the shift. | 11-20-2014 |
20150078793 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes a fixing belt, a pressure rotating body, a nip member, a supporting member, a heating source, a heat conducting member and a reflecting member. The pressure rotating body is rotatably arranged outside the fixing belt to come into pressure contact with the fixing belt to form a fixing nip. The nip member is arranged inside the fixing belt to press the fixing belt toward the pressure rotating body. The supporting member supports the nip member. The heating source is arranged inside the fixing belt to emit radiant heat. The heat conducting member is supported by the supporting member in a cantilevered state to come into contact with an inner circumference face of the fixing belt and to absorb the radiant heat. The reflecting member reflects the radiant heat toward the heat conducting member and at least partially comes into contact with the heat conducting member. | 03-19-2015 |
20150248089 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes a fixing belt, a pressuring member, a pressing member and a sheet member. The fixing belt is arranged rotatably and configured to extend along an axis direction. The pressuring member is arranged rotatably and configured to come into pressure contact with the fixing belt so as to form a fixing nip. The pressing member is configured to press the fixing belt to a side of the pressuring member and configured such that the fixing belt is interposed between the pressing member and the pressuring member. The sheet member is formed in a tubular shape and provided around the pressing member and configured to rotate with rotation of the fixing belt. | 09-03-2015 |
20150293481 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes a fixing belt, a pressuring member, a heat source and a nip member. The fixing belt is arranged rotatably. The pressuring member is arranged rotatably to come into pressure contact with the fixing belt so as to form a fixing nip. The heat source is arranged at the inside in a radial direction of the fixing belt to radiate a radiant heat. The nip member is arranged so as to sandwich the fixing belt between the nip member and the pressuring member. The heat source, the fixing belt and the nip member are arranged so that the radiant heat radiated from the heat source reaches directly an inner circumference face of the fixing belt and the nip member. | 10-15-2015 |
20150293482 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes a fixing belt, a pressuring member, a pressing member, a heat source and a heat transmitting member. The fixing belt is arranged rotatably. The pressuring member is arranged rotatably to come into pressure contact with the fixing belt so as to form a fixing nip. The pressing member presses the fixing belt to a side of the pressuring member. The heat source is arranged at the inside in a radial direction of the fixing belt to radiate a radiant heat. The heat transmitting member comes into contact with an inner circumference face of the fixing belt to absorb the radiant heat radiated from the heat source. A part of the heat transmitting member is sandwiched between the fixing belt and the pressing member. | 10-15-2015 |