| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 399331000 | Pressure rollers | 46 |
| 20100074661 | IMAGE FORMING APPARATUS - In an image forming apparatus including a fixing portion in which a fixing nip portion is defined between a heater and a pressure roller via an endless belt, a pressure setting portion, which sets a pressure to be exerted on the fixing nip portion, sets a first pressure during fixing, sets a second pressure lower than the first pressure when the apparatus is not used, and sets a third pressure lower than the first pressure and higher than the second pressure when a recording material is jammed. | 03-25-2010 |
| 20090092426 | FIXING APPARATUS, ROLLER FOR THE FIXING APPARATUS, FLEXIBLE SLEEVE FOR THE FIXING APPARATUS, AND METHODS OF MANUFACTURING THE ROLLER FOR THE FIXING APPARATUS AND THE FLEXIBLE SLEEVE FOR THE FIXING APPARATUS - A fixing apparatus, a roller for a fixing apparatus, and a flexible sleeve for a fixing apparatus are a roller for the fixing apparatus ( | 04-09-2009 |
| 20090245902 | IMAGE FORMING APPARATUS - An image forming apparatus is provided with an image forming station and a fixing unit including a heating member. The fixing unit includes a coil for generating a magnetic field for induction heating the heating member; a first core arranged to face the heating member with the coil located therebetween; a bar-shaped second core including a cut-off portion and arranged in a magnetic path between the first core and the heating member, when seen in a magnetic field generation direction by the coil, to form the magnetic path together with the first core; and a magnetic adjusting mechanism for changing the posture of the second core between a first posture for guiding a magnetic field by retracting the cut-off portion from the magnetic path and a second posture for increasing magnetic resistance by locating the cut-off portion in the magnetic path by rotating the second core about an axis thereof. | 10-01-2009 |
| 20130121738 | Fixing Device for Image-Forming Device, Capable of Adjusting Nip Force Between Heating Roller and Pressure Roller - A fixing device includes a frame, a pressure arm pivotably supported on the frame, and a nip release lever supported on the pressure arm. The pressure arm can release pressure contact between a heating roller and a pressure roller. The nip release lever can move between a pressing position and a release position so as to move the pressure roller between a position at which the pressure roller applies pressure to the heating roller and a position at which the pressure roller applies no pressure. The nip release lever can be halted in the release position. | 05-16-2013 |
| 20130129396 | FIXING DEVICE AND IMAGE FORMING APPARATUS - There are provided a fixing device having excellent fixation properties when a toner image is fixed onto a member to be subjected to fixation, and an image forming apparatus including the fixing device. A fixing device includes a fixing belt, a fixing roller and a heating roller between which the fixing belt is wound under tension, and a pressure roller which is in pressure-contact with the fixing roller through the fixing belt. An elastic layer as a surface layer of the fixing roller has, when being brought into pressure-contact with the pressure roller through the fixing belt, a pressing rate of 40% or more, and an Asker C hardness of 20 degrees or more and less than 30 degrees. | 05-23-2013 |
| 20100290823 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device for fixing an unfixed image on a recording sheet passing through a fixing nip formed by pressing a pressing member against an inside surface of a pressure belt via a low friction sheet, so that an outside surface of the pressure belt presses against a fixing member, wherein the pressing member includes a first pressing part having an elastic front face, and (ii) a second pressing part whose front face presses against a rear face of the first pressing part, the low friction sheet extends from a portion thereof pressed by the front face against the pressure belt, to an upstream end thereof, along a lateral side of the first pressing part, the upstream end being upstream from the other end with respect to a rotation direction of the pressure belt and sandwiched between the rear face and the front face by pressure. | 11-18-2010 |
| 20110286776 | METHOD AND APPARATUS FOR FUSING A RECORDING MATERIAL ON A MEDIUM - In a method for fusing a recording material on a medium, a fusing element is radiated close to and upstream from a fuse nip. Thus, the heat that is provided has very little time to penetrate the fusing element and thus remains at a surface of the fusing element. Therefore, the fusing element does not need to be heated thoroughly, which would require a substantial amount of time. Consequently, in the method, heat may be provided on demand and an energy efficient fuse method is thus provided. | 11-24-2011 |
| 20110170919 | Fixing Device - A fixing device includes a tubular fusing film, a heater, a nip member, a backup member, a first supporting member, and a second supporting member. The heater may be disposed inside the tubular shape of the fusing film. The nip member may be disposed so as to be in sliding contact with the inner surface of the fusing film and heated by the heater. The backup member may form a nip portion between the backup member and the fusing film with the fusing film between the backup member and the nip member. The first supporting member may be configured to support the nip member. The second supporting member may be configured to support the heater and movably support the first supporting member so that the nip member moves relative to the backup member and the heater. | 07-14-2011 |
| 20120189362 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes: an induction coil; heating rotator; pressurizing rotator disposed to face the heating rotator; fixing nip; and magnetic core unit. The heating rotator is disposed in a region through which a magnetic flux generated by the induction coil passes and rotates about a first rotational shaft. The magnetic core unit forms a magnetic path circularly encloses the induction coil. The magnetic core unit includes arch core portions and a core supporting member supporting these portions. The arch core portions each have an arch shape facing the heating rotator across the induction coil and are arranged at intervals in a direction of the first rotational shaft. Each arch core portion has first engaging portions formed respectively at both ends thereof and a core main body formed between the first engaging portions. The core supporting member has second engaging portions with which the first engaging portions are engageable. | 07-26-2012 |
| 20090148207 | Fixing device and image forming apparatus - A fixing device includes a flexible fixing member that heats a toner image to fuse, a contact member fixedly disposed internal to the fixing member and comes into contact with a pressure member via the fixing member to form a nip part, a plurality of heating devices that heats the contact member, wherein the contact member always maintains the contact state with the pressure member via the fixing member, the plurality of heating devices generally remain disposed in the fixing device under an operational state for heating and are freely removable for replacement under a non-operational state for heating. | 06-11-2009 |
| 20110170920 | Fixing Device - A fixing device includes a tubular fusing film, a heater, a nip member, a backup member, a backup member, first supporting member, and a second supporting member. The heater may be disposed inside the tubular shape of the fusing film. The nip member may be disposed so as to be in sliding contact with the inner surface of the fusing film and heated by the heater. The backup member may form a nip portion between the backup member and the fusing film with the fusing film between the backup member and the nip member. The first supporting member may be configured to integrally support the heater and the nip member. The second supporting member may be configured to movably support the first supporting member so that the nip member moves relative to the backup member. | 07-14-2011 |
| 20080292377 | FIXING DEVICE, AND IMAGE FORMING APPARATUS PROVIDED WITH THE SAME - A fixing device includes: a fixing roller; a support roller arranged apart from the fixing roller; an endless fixing belt wound around the fixing roller and the support roller; a pressing roller for applying a pressure force to the fixing roller while the fixing belt being sandwiched between the fixing roller and the pressing roller; a nip extending member arranged on an upstream of the fixing roller and on an inner side of the fixing belt and having a pressing surface for pressing the fixing belt; and a variable mechanism for changing a state of a pressure applied to the fixing belt by the nip extending member. | 11-27-2008 |
| 20080286019 | PRESSURE ROLL FOR FUSING OPERATION - Washers are used for a pressure roll in a fusing system of an electrophotographic system that improve the functionality and durability of the pressure roll. These washers are made up of a rigid ring section having flexible (less rigid) fingers projecting from the inner periphery of the ring. This provides a more uniform pressure to be exerted in the pressure roll and, consequently, a more uniform nip for better handling and fusing. | 11-20-2008 |
| 20090180821 | FIXING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A fixing device of the present invention is arranged so that: (i) at least both ends of a planar heat-generating member come close to or touch an outer surface of a fixing roller, said both ends being in a circumferential direction when viewed in an axial direction of the fixing roller; and (ii) the planar heat-generating member has, in the vicinity of both the ends, shapes formed gently with respect to the outer surface of the fixing roller when viewed in the axial direction. An almost whole inner surface area of the fixing belt wound around the planar heat-generating member and the fixing roller touches the planar heat-generating member or the fixing roller. The fixing belt is naturally formed, without being distorted at an area where the fixing belt touches the heating member. This allows a fixing device using a planar heat-generating belt type fixing method, which provides a short warm-up time, to be excellent in heat efficiency, consume less power, and have a fixing belt which does not slip easily. | 07-16-2009 |
| 20090129836 | Fixing device and image forming apparatus using this fixing device - A fixing device and an image forming apparatus using this, in which even if permanent warping is produced on a roller member that forms a fixing nip portion, no collision sound is produced due to the collision of gears, the fixing device including: two roller members that form a nip portion in which a recording medium is pressed by pressure means and transported; and a drive gear that engages with a shaft portion of one of the two roller members and transmits driving force to that roller member. A key is formed in the drive gear and a key groove having a gap opened therein is formed in the shaft portion, and when a rotation velocity of the roller member increases, transmission of driving force from the drive gear to the shaft portion is suspended and the drive gear slides on the shaft portion. | 05-21-2009 |
| 20090185840 | FUSING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - A fusing unit is comprised of a pair of rollers, a fusing roller and a pressing roller, having an elastic layer on their outer peripheral surface and a pressing spring for pressing the fusing roller against the pressing roller, and causes a sheet of paper with an unfixed toner image to pass through the nip portion where the fusing roller and pressing roller are put in press-contact with each other so as to fuse the toner image and fix it to the paper. This fusing device further includes a roller member regulator for regulating the press-contact state when the fusing roller and pressing roller are put in press-contact with each other by the pressing spring. | 07-23-2009 |
| 20090016791 | FUSING DEVICE AND IMAGE FORMING APPARATUS HAVING THE SAME - A fusing device fuses an image on a printing medium, and includes a belt which is provided to rotate; a heating plate which is supported to an inner surface of the belt, a pressing roller which presses the printing medium against the heating plate, and a piezoelectric member which is disposed to the heating plate and presses at least one portion of the heating plate with respect to the pressing roller if power is applied thereto. | 01-15-2009 |
| 20110142507 | HEATING APPARATUS AND IMAGE FORMING APPARATUS - A heating apparatus of the present invention includes a press member that undergoes driven rotation by contacting a heating member that rotates, the press member conveying a recording medium while nipping the recording medium between the press member and the heating member; a contact and separation mechanism that contacts the press member against the heating member and separates the press member away from the heating member; and a drive mechanism that rotationally drives the press member when the press member is separated from the heating member by the contact and separation mechanism. | 06-16-2011 |
| 20090003902 | IMAGE HEATING APPARATUS AND PRESSURE ROLLER USED FOR IMAGE HEATING APPARATUS - A pressure roller forming a nip portion for contacting to a heating member to pinch and convey and heat recording material includes: a core metal and an elastic layer containing filler, the elastic layer containing the filler including thermal conductive filler with length of not less than 0.05 mm and not more than 1 mm and with thermal conductivity λ | 01-01-2009 |
| 20090003901 | FUSING DEVICE AND IMAGE FORMING APPARATUS HAVING THE SAME - A fusing device to fuse an image to a printing medium, the fusing device including: a heating roller; a first pressing roller, which presses the printing medium against the heating roller; and a second pressing roller which attached to the first pressing roller, to detach the printing medium from the first pressing roller. The first and second pressing rollers are biased against the heating roller such that the first and second pressing rollers move according to a change in a position of the heating roller. | 01-01-2009 |
| 20090208266 | FUSING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - A fusing unit is comprised of a fusing roller and a pressing roller, having an elastic layer on their outer peripheral surface and a pressing structure for pressing the fusing roller against the pressing roller, and causes a sheet of paper with an unfixed toner image to pass through the nip portion where the fusing roller and pressing roller are put in press-contact with each other so as to fuse the toner image and fix it to the paper. This fusing unit further includes a pressure release lever for regulating the pressing action of the pressing structure when the rollers are put in press-contact with each other by the pressing structure. | 08-20-2009 |
| 20080232872 | IMAGE FORMING APPARATUS INCLUDING A HEAT SHIELDING DEVICE - An image forming apparatus includes an image forming device that forms a toner image on a recording medium, a heat fixing device provided adjacent to the image forming device to fix the toner image onto the recording medium by heat, and a heat shielding device that shields the image forming device from the heat radiated from the heat fixing device. The heat shielding device includes a heat shielding member interposed between the image forming device and the heat fixing device to receive the heat radiated from the heat fixing device, a heat transferring member attached to the heat shielding member to transfer the heat received by the heat shielding member to one end portion thereof, a heat radiating fin device provided at the one end portion of the heat transferring member to radiate the transferred heat, and a fan that supplies air to the heat radiating fin device. | 09-25-2008 |
| 20100272483 | FIXING DEVICE AND IMAGE FORMING APPARATUS INCLUDING SAME - A fixing device is provided with a heating member, a pressing member, a coil, a fixed core, a movable core and a shielding member provided on the movable core and a position switching unit moving the shielding member between a shielding position where a ring part shields magnetism and a retracted position where the ring part does not shield magnetism. A first area requiring magnetic shielding and a second area not requiring magnetic shielding are selectively set in the heating member. The shielding member includes a first annular portion provided at a position corresponding to a boundary part between the first and second areas, and the first annular portion has a shape closed in a circumferential direction and is electrically insulated at a circumferential part when viewed in an axial direction of the movable core. | 10-28-2010 |
| 20090116886 | IMAGE HEATING APPARATUS AND PRESSURE ROLLER THEREIN - A pressure member contacts with a heating member | 05-07-2009 |
| 20090016792 | IMAGE FORMING APPARATUS, FIXING DEVICE, AND FIXING METHOD - An image forming apparatus includes an image forming mechanism for forming a toner image on a recording medium, and a fixing device for fixing the toner image on the recording medium. The fixing device including a fixing film, a pressure member, a contact member, a heating device, a holding member, and at least one of a low friction member and a thermal conductivity improving member provided between the fixing film and the contact member. The fixing film heated by the heating device via the contact member comes into contact with the recording medium. The pressure member comes into pressure contact with the fixing film. The contact member comes into pressure contact with the pressure member via the fixing film to form, between the fixing film and the pressure member, a nip portion through which the recording medium is passed. The holding member holds the contact member and the heating device. | 01-15-2009 |
| 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 |
| 20100215416 | PRESSER MEMBER, FIXING DEVICE AND IMAGE FORMING APPARATUS - A first pad has a first nip forming surface which extends in a direction X. An angle formed between an end portion of the first nip forming surface and an XZ plane is smaller than an angle formed between a central portion of the first nip forming surface and the XZ plane, where the XZ plane is formed on a downstream side of the first nip forming surface. Thereby, a fixing device is provided which suppresses generation of wrinkles on a recording material when the fixing device fixes toner on the recording material and conveys it. | 08-26-2010 |
| 20110058866 | Fixing device and image forming apparatus employing the fixing device - A fixing device includes an endless, rotatable fixing member, a rotational pressing member, a nip formation member, and an urging unit. The rotational pressing member is rotatably provided in contact with the fixing member. The nip formation member is disposed opposite the rotational pressing member via the fixing member to form a fixing nip between the fixing member and the rotational pressing member. The urging unit is disposed opposite the rotational pressing member via the nip formation member and the fixing member to push against and deform the nip formation member to change a curvature of a contact face between the fixing member and the rotational pressing member at the fixing nip. | 03-10-2011 |
| 20100239338 | FIXING APPARATUS AND IMAGE FORMATION APPARATUS - In a fixing apparatus including a fixing roller including an elastic layer, a heating roller including a heat source, the heating roller being formed by sequentially layering an elastic layer and a mold release layer on an outer circumferential face of a shaft, a fixing belt wound around the fixing roller and the heating roller, the fixing belt being formed by sequentially layering an elastic layer and a mold release layer on an endless belt type base material layer formed from heat-resistant resin, and a pressurizing roller that is pressed to the fixing roller via the fixing belt, volume resistivity of the base material layer of the fixing belt is in a range of 10 | 09-23-2010 |
| 20090148206 | Fixing device using induction heating and image forming apparatus using the fixing device - In a fixing device for fixing a toner image on a recording medium, a fixing roller and a heating roller support a fixing belt. A pressing roller presses against the fixing roller via the fixing belt to form a fixing nip between the fixing belt and the pressing roller. A tension roller presses against the fixing belt to apply tension to the fixing belt. A primary heat source heats the fixing belt, and is disposed along an outer face of the fixing belt opposite the heating roller. A secondary heat source is provided inside the tension roller to supply deficient heat not provided by the primary heat source. | 06-11-2009 |
| 20080310895 | FIXING DEVICE FOR IMAGE FORMING DEVICE, CAPABLE OF ADJUSTING NIP FORCE BETWEEN HEATING ROLLER AND PRESSURE ROLLER - A fixing device includes a frame, a pressure arm pivotably supported on the frame, and a nip release lever supported on the pressure arm. The pressure arm can release pressure contact between a heating roller and a pressure roller. The nip release lever can move between a pressing position and a release position so as to move the pressure roller between a position at which the pressure roller applies pressure to the heating roller and a position at which the pressure roller applies no pressure. The nip release lever can be halted in the release position. | 12-18-2008 |
| 20090110452 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A disclosed fixing device includes a fixing member configured to heat and melt a toner image to fix it onto a recording medium; a pressure member abutting the fixing member to form a nip into which the recording medium is fed; a separating member disposed on the downstream side in the moving direction of the fixing member in relation to the nip in a manner to oppose the fixing member, and configured to perform a separating operation to prevent the recording medium from winding around the fixing member; an electrically grounded frame supporting the fixing member, the pressure member and the separating member; and a conductive member inserted between a supporting portion of the frame and a supported portion of the separating member and having a higher electric resistance than the frame. The separating member and the frame are rendered electrically conductive to each other only via the conductive member. | 04-30-2009 |
| 20100322684 | FUSER FOR IMAGE FORMING APPARATUS - A fuser includes: a rotational member configured to rotate; a press member configured to press a recording medium at a nip between the rotational member; an induction-current generator configured to generate induction current in the rotational member; a heat insulator partially transparent to an infrared ray; an insulator driver configured to move the heat insulator to cover the press member; and a thermometer configured to receive the infrared ray emitted from the press member. | 12-23-2010 |
| 20080317527 | FUSING APPARATUS AND ELECTROPHOTOGRAPHIC IMAGE-FORMING APPARATUS HAVING THE SAME - A fusing apparatus includes a heating unit to generate heat to fuse an image onto a printing medium, a pressurizing roller that faces and contacts the heating unit having an endless fusing film that is rotated while facing and contacting the pressurizing roller and presses the printing medium toward the heating unit, a nip forming member including a main body formed inside the fusing film to surround a heat source and contacts a portion of the fusing film to the pressurizing roller to form a nip, a plurality of opening forming portions connected to the main body and form an opening portion such that heat generated from the heat source directly arrives at the fusing film via the opening portion, and a plurality of adhering portions connected to the opening forming portions, are separated from each other, having the opening portion therebetween, and contact the fusing film, and a supporting member to support the nip forming member. | 12-25-2008 |
| 20100034568 | FIXING DEVICE - To provide a technique for preventing a temperature rise in a non-sheet passing areas in a fixing device. The fixing device includes: a heating rotational member that includes at least one roller and heats a toner transferred on a sheet; a pressing roller that nips and carries the sheet in cooperation with the heating rotational member; a heating device that heats the heating rotational member; and heat pipes arranged, on the inside of at least one of the roller of the heating rotational member and the pressing roller, in ranges on both the sides in an axial direction of the roller from positions closer to the center in the axial direction than both the ends of a minimum sheet passing range in the axial direction of the roller of the nipped and carried sheet to positions further on the outer sides in the axial direction than both the ends of a maximum sheet passing range. | 02-11-2010 |
| 20100166471 | IMAGE FORMING APPARATUS AND FIXING DEVICE - According to an embodiment of the invention, a fixing apparatus including, a first rotating member, a second rotating member which presses a sheet between the first rotating member and the second rotating member with a first pressure to fix a visualizing agent to the sheet, a separation member which separates the sheet from the first rotating member, a pressure control unit which lowers the pressure between the first rotating member and the second rotating member to a second pressure that is lower than the first pressure, and a heating mechanism which does not heat the first rotating member in a first state where the first rotating member does not rotate and the pressure between the first rotating member and the second rotating member is the second pressure, and heats the first rotating member after the first state when the a second state is set in. | 07-01-2010 |
| 20100158588 | FUSING UNIT AND IMAGE FORMING APPARATUS HAVING THE SAME - A fusing unit and an image forming apparatus having the same. The fusing unit may include a heating roller, a fusing frame to which the heating roller may be mounted, a pivoting frame to mount to the fusing frame to be rotatable about the heating roller, and a plurality of pressure rollers to mount to the pivoting frame and to be elastically supported on an outer peripheral surface of the heating roller. When paper that undergoes serious curling beyond an appropriate level is used, the pressure rollers may rotate to allow paper having passed between the heating roller and the pressure rollers to move in a path rotated by an angle corresponding to a rotation angle of the pressure rollers. This exemplary embodiment may reduce paper jam. | 06-24-2010 |
| 20120148320 | FUSING APPARATUS AND IMAGE FORMING APPARATUS HAVING THE SAME - A fusing apparatus including a heating roller supplying heat onto a printing medium; a first pressure roller forming a first fusing nip by contacting a heating roller; a second pressure roller forming a second fixing nip by contacting the heating roller; a frame on which the heating roller, the first pressure roller and the second pressure roller are installed; and at least one bending reducing roller that reduces the bending of the second pressure roller by supporting a part of the second pressure roller in the lengthwise direction is provided. | 06-14-2012 |
| 20120045261 | FUSING APPARATUS AND IMAGE FORMING APPARATUS PROVIDED WITH THE SAME, AND HEATING APPARATUS - A fusing apparatus that including a sheet heating element for generating heat to fix a toner image being transferred onto a sheet; an endless belt; a rigid member for conducting the heat to the endless belt and being arranged to contact with the sheet heating element and the endless belt respectively; and a pressure member for pressing the sheet heating element against the rigid member, wherein the endless belt is arranged to contact with the sheet, the sheet heating element includes an elongated substrate extending in a widthwise direction of the endless belt, plural resistance heating layers which are formed on a surface of the substrate along a longitudinal direction thereof and arranged parallel to one another, and at least one conduction portion formed in at least one place of an intermediate region between one end and another of each resistance heating layer to connect the different resistance heating layers, and the pressure member presses the sheet heating element against the rigid member at a position other than a position where the conduction portion is formed. | 02-23-2012 |
| 20120163887 | FIXING DEVICE - A fixing device includes a film, a roller forming a nip with the film, for conveying a sheet while nipping the sheet, a member for urging one of the film and the roller toward the other, a heater for heating one of the film and the roller, a cam, rotationally driven by a motor, for moving the urging member in a releasing direction or a restoring direction of an urging force by the urging member, a gear that swings, depending on normal or reverse rotation of the motor, and a stopper to stop the swinging of the gear. By this arrangement, the rapid rotation of gears that are free from engagement, which can cause impact noise during a transitional process between a gear engagement state in a nip-released state by the roller and a gear engagement state during a nipping function by the roller, can be suppressed. | 06-28-2012 |
| 20100209153 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device has a presser member, a slide member and a pressure belt. Both ends of the presser member are positioned outside both ends of the slide member. Both ends of the slide member are positioned outside both ends of the pressure belt. Thereby, the slide member and the pressure belt are improved in service life, so that the fixing device as a whole is improved in service life. | 08-19-2010 |
| 20100209152 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device has a presser member, a heating roller and a pressure belt. An overall length of the presser member is longer than an overall length of a rubber layer of the heating roller. Both ends of the presser member are positioned outside both ends of the rubber layer of the heating roller. An overall length of the presser member is longer than an overall length of the pressure belt. Both ends of the presser member are positioned outside both ends of the pressure belt. Thereby, the heating roller and the pressure belt are improved in service life, so that the fixing device as a whole is improved in service life. | 08-19-2010 |
| 20120170957 | FUSING DEVICE AND IMAGE FORMING APPARATUS HAVING THE SAME - A fusing device and an image forming apparatus having the same are provided. The fusing device includes a position regulating device to regulate a position of a side frame which rotatably supports a fusing belt, thereby fixing a position of a fusing nip defined between the fusing belt, inside of which a heat source is placed, and a pressure roller arranged to face the fusing belt. The fusing device prevents shift of a recording medium delivery path due to deformation of the pressure roller. | 07-05-2012 |
| 20120257913 | IMAGE HEATING APPARATUS AND PRESSURE ROLLER USED FOR IMAGE HEATING APPARATUS - A pressure roller forms a nip for contacting a heating member to pinch and convey a heat recording material. The roller includes a core metal and an elastic layer containing filler. The elastic layer containing the filler includes thermal conductive filler with a length of not less than 0.05 mm and not more than 1 mm with a thermal conductivity λ | 10-11-2012 |
| 20110236092 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes: a rotating member supporting section supporting a first rotating member rotatably and movable in direction in which the first rotating member approaches and leaves a second rotating member; a compression spring pushing the rotating member supporting section in the direction of approaching the second rotating member; and a pressing member pressing the compression spring to the rotating member supporting section. The device further includes: a first spring contact member contacting the compression spring and movable in a compression-and-expansion direction of the compression spring relative to the rotating member supporting section; a first adjustment screw adjusting a position of the first spring contact member; a second spring contact member contacting the compression spring and movable in a direction inclined to the compression-and-expansion direction, relative to the pressing member; and a second adjustment screw adjusting a position of the second spring contact member relative to the pressing member. | 09-29-2011 |
| 20120321361 | Fixing Device and Image-Forming Apparatus - A fixing device for fixing a developed image of developer onto a recording sheet by heating and fusing the developer includes a heating roller, a pressure roller and a driving force input element. The heating roller is configured to be heated by a heat source, such as a halogen heater. The pressure roller is disposed adjacent to the heating roller, such that a recording sheet is fed and conveyed between the pressure roller and the heating roller. The driving force input element is fixed to the pressure roller for causing the pressure roller to rotate. A diameter Dp of the pressure roller and a nip width N between the heating roller and the pressure roller in circumferential directions thereof have a relationship represented by the following expression: 0.24| 12-20-2012 | |
