Patent application number | Description | Published |
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 |
20100046995 | FIXING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A fixing apparatus | 02-25-2010 |
20110026986 | FIXING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE SAME - An embodiment of the present invention includes a fixing member; a pressure member for pressing against the fixing member so as to form a nip region between the pressure member and the fixing member; a pressure cancellation unit for pressing the pressure member against the fixing member and for cancelling the state in which the pressure member is pressed against the fixing member; a paper detachment member for detaching paper held between the fixing member and the pressure member in the nip region from the pressure member; and a separation mechanism for cleaning the paper detachment member by separating the paper detachment member from the pressure member in conjunction with a pressure cancellation operation of the pressure cancellation unit. | 02-03-2011 |
20110076072 | FIXING APPARATUS AND IMAGE FORMING APPARATUS - In one embodiment, in a fixing apparatus that is provided with a plurality of rollers including a fixing roller, and an endless fixing belt that is wound around the plurality of rollers, a regulation belt for regulating movement of the fixing belt in the axial direction is wound around at least one of both sides in the axial direction of at least one roller (for example, two rollers) among the plurality of rollers. | 03-31-2011 |
20110229221 | FIXING APPARATUS AND IMAGE FORMING APPARATUS - The fixing apparatus is provided with a cleaning pad that is pressed against at least one of roller members composed of a fixing roller, a pressurizing roller and an external heating roller to clean a surface of the roller member, and the cleaning pad is composed of a pad member that cleans the surface of the roller member, and a support member that press the pad member against the surface of the roller member to support. The support member has a plurality of opening portions formed along a thrust direction of the roller member, and has a larger opening area per unit length of the support member at a center part of the support member than that at both edge parts thereof. For example, an interval of holes or slits is narrower at the center part of the support member than that at the both edge parts thereof. | 09-22-2011 |
20110249996 | FIXING DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH SAME - A fixing device is provided in which a rotation member and a roller are caused to rotate pressing against each other, a recording paper is sandwiched and transported in a nip region between the rotation member and the roller, a leading edge of a peeling plate is positioned with respect to a peripheral surface of the rotation member, and the recording paper is separated from the rotation member by the peeling plate. In this fixing device, a surface of the peeling plate faces a transport route of the recording paper. Furthermore, in this fixing device, a contact member is provided that contacts a rear surface of the peeling plate displaced in a direction in which the leading edge of the peeling plate approaches the peripheral surface of the rotation member and prohibits displacement of the peeling plate after contact of the peeling plate to the contact member. | 10-13-2011 |
20110280636 | FIXING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A fixing apparatus of the present invention includes a fixing rotation member, a rotation drive portion that rotates the fixing rotation member, a cleaning web sheet that cleans a circumferential surface of the fixing rotation member, a cleaning web sheet roller that takes up or feeds out the cleaning web sheet, a swing cam rotationally driven by the rotation drive portion, a rotation transmission portion that transmits a rotation drive force to the cleaning web sheet roller, a one way clutch provided on an input shaft of the rotation transmission portion, and a swing lever connected to the one way clutch and biased so as to be brought into slide contact with the swing cam. | 11-17-2011 |
20120093549 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes: a fixing belt in an endless form; a fixing roller; a separating roller for separating, from the fixing belt, a paper sheet onto which a developer is fixed and fused; a heating roller for heating the fixing belt; a pressurizing roller for forming a fixing nip portion between the fixing belt and the pressurizing roller; a first lever to which the fixing roller and the separating roller are fixed, the first lever pivoting around a first supporting point used as the center point; a second lever to which the fixing roller and the heating roller are fixed, the second lever pivoting around a second supporting point used as the center point; a first spring for biasing the first lever; and a second spring for biasing the second lever. | 04-19-2012 |
20140193181 | FIXING DEVICE AND IMAGE FORMING APPARATUS INCLUDING SAME - A fixing device in accordance with the present invention comprises: a rotary member for transporting printing paper; a pressure member for press-contacting the rotary member to apply pressure onto the printing paper; and a cleaning member capable of freely moving into contact with, or away from, a peripheral surface of the rotary member and/or a peripheral surface of the pressure member. A toner image formed on the printing paper is fixed while the printing paper is being held between the rotary member and the pressure member. The fixing device further comprises a contact and separation unit for moving the pressure member into contact with, or away from, the rotary member. The cleaning member moves into contact with, or away from, the peripheral surface of the rotary member and/or the peripheral surface of the pressure member in conjunction with the contact and separation unit moving the pressure member into contact with, or away from, the rotary member. | 07-10-2014 |
20140369724 | IMAGE FORMING APPARATUS - An image forming apparatus includes a pre-fusing paper sheet guide, a fuser unit and a control section. The pre-fusing paper sheet guide is disposed adjacent to the fuser unit on its upstream side. The fuser unit includes a pressing roller having, an electrically conductive surface, a grounding structure grounding a pressing roller's surface, and a cleaning mechanism cleaning the pressing roller's surface. The cleaning mechanism includes a web and a take-up roller. The control section sets a winding quantity x of the web to 0.7 mm when a setting for printing without margin is not made, and sets the winding quantity x to 2.1 mm when the setting for printing without margin is made. If the number of sheets accumulated through the image forming process becomes not less than 18, the control section causes the take-up roller to wind the web by the winding quantity x, and performs an image forming process. | 12-18-2014 |