Patent application number | Description | Published |
20100247179 | FIXING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A fixing device comprises: a pair of fixing rotors, at least one of which has a heating source and both of which are rotated in pressure contact with each other; and a click-shaped peeling member provided on a downstream side of the fixing rotor with respect to a transporting direction of a recording medium and disposed in contact with a surface of the fixing rotor, wherein a tip portion of the click-shaped peeling member which is to come in contact with the fixing rotor is elastically deformed in conformity to a shape of a surface of the fixing rotor when coming in contact with the fixing rotor. | 09-30-2010 |
20100247186 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device comprises a heating roll; an endless belt; and a pressurizing member that forms a pressure contact portion for pushing the endless belt against an outer peripheral surface part of the heating roll from an inner peripheral surface side of the pressurizing member so that a recording medium holding an unfixed image passes between the pressure contact portion and the heating roll, wherein the pressurizing member includes: a hard pressurizing member and a soft pressurizing member the hard pressurizing member, and the soft pressurizing member are disposed in a state in which a clearance is present between the hard pressurizing member and the soft pressurizing member in a specific region part so that at least a specific recording medium passes in a fixing region of the pressure contact portion in the rotating axis direction of the heating roll. | 09-30-2010 |
20100247196 | RECORDING MEDIUM TRANSPORT MECHANISM, FIXING DEVICE AND IMAGE FORMING APPARATUS - A recording medium transport mechanism including: a transporting device provided in a transport-path of medium, that transports the recording medium by a drive-roller and a facing-roller disposed to face the drive-roller; an urging member that urges the facing-roller toward the drive-roller; and a restricting portion that allows movement of the facing-roller away from the drive-roller against urging force of the urging member when the recording medium having thickness smaller than a predetermined thickness is transported in a region the drive-roller and the facing-roller facing each other, and restricts an allowable amount of movement of the facing-roller away from the drive-roller when the recording medium having thickness not smaller than the predetermined thickness is transported in the region compared to an allowable amount of movement of the facing-roller away from the drive-roller when the recording medium having thickness smaller than the predetermined thickness is transported is provided. | 09-30-2010 |
20100247200 | RECORDING MEDIUM TRANSPORTING DIRECTION SWITCHING MECHANISM, FIXING DEVICE AND IMAGE FORMING APPARATUS - A recording-medium-transporting-direction-switching-mechanism including a transport-unit transporting the recording-medium in one/another directions; a guiding-unit rotatably supported and one-end-portion being provided to be capable of existing in a transport-path, the guiding-unit being rotated by a leading-end-portion of the recording-medium transported toward the transport-unit contacting the guiding-unit, and rotating in a reverse-direction after a trailing-end-portion of the recording-medium transported by the transport-unit in the one-direction passes therethrough, and guiding the recording-medium transported by the transport-unit in the other-direction after the trailing-end-portion of the recording-medium passes therethrough, the one-end-portion of the guiding-unit having substantially rectanglular-shape, and a direction in which the leading-end-portion of the recording-medium transported toward the transport-unit is directed intersecting at an acute angle with a surface of the guiding-unit against which the leading-end-portion of the recording-medium contacts; and a detecting-unit that detects a state where the recording-medium is passing through the guiding-unit by rotating integrally with the guiding-unit, is provided. | 09-30-2010 |
Patent application number | Description | Published |
20090154972 | COLLECTED DEVELOPER CONVEYING DEVICE AND IMAGE FORMING APPARATUS - A collected developer conveying device includes: a conveying passage through which collected developer is conveyed; a conveying member that is disposed in the conveying passage, and conveys the developer in the conveying passage by rotation thereof; a developer carrying body that holds developer on a surface thereof, and that is relatable; and a ventilation passage through which air passes from a developing container including the developer carrying body, wherein the conveying passage includes an air flow region formed in a part thereof upper than a rotational center of the conveying member in a gravitational direction, in a side of the conveying passage in which the conveying member rotates from an upper part of the conveying passage to a lower part thereof in the gravitational direction. | 06-18-2009 |
20110211873 | SHEET PRESSING DEVICE AND IMAGE FORMING APPARATUS - A sheet pressing device includes plurality of pressing members and a support member. The plurality of pressing members is provided on a downstream side in a discharging direction of fixing unit which carries out a fixing treatment over a sheet having an unfixed image transferred thereonto along the discharging direction. The plurality of pressing members presses both ends of the sheet in a direction along a surface of the sheet carried out the fixing treatment by the fixing unit and in a direction crossing the discharging direction. The support member supports the plurality of pressing members movably in such a direction as to approach or separate from the sheet when the sheet passes through the sheet pressing device. | 09-01-2011 |
20110222944 | PAPER TRANSPORTING DEVICE, IMAGE FORMING APPARATUS, IMAGE READING DEVICE AND POST-PROCESSING DEVICE - A paper transporting device includes a driving roller member, a driven roller member, a first guiding member and a second guiding member. The driving roller member is rotated. The driven roller member is rotated in contact with the driving roller member. The first guiding member is disposed on a driving roller member side, and guides a paper to a contact portion in which the driving roller member and the driven roller member are in contact with each other. The second guiding member is disposed on a driven roller member side, and guides the paper to the contact portion. The second guiding member partially protrudes inward in a radial direction of the driving roller member from an outer peripheral surface of the driving roller member at a downstream side in a paper transporting direction of the contact portion. | 09-15-2011 |
20110236067 | FIXING DEVICE, SINGLE-SIDED IMAGE FORMING APPARATUS, AND DOUBLE-SIDED IMAGE FORMING APPARATUS - A fixing device is provided with a fixing device body, a fixing member, and a first attachment section. The fixing device body is adapted to attach to and detach from an apparatus body of a double-sided image forming apparatus, which has a return passage through which a recording medium is returned to an image forming position, and an apparatus body of a single-sided image forming apparatus, which does not have the return passage. The first attachment section is provided at a return passage side in the fixing device body, and is adapted to have a passage surface member, which has a passage surface of an introduction passage through which a fixed recording medium is introduced into the return passage, attached thereto. | 09-29-2011 |
20110236068 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes a main body mounted on an image forming apparatus body; a fixing member that is included in the main body and that fixes an image to a recording medium; a pair of conveying rolls that is supported by the main body and that conveys the recording medium to which an image is fixed by the fixing member, the pair of conveying rolls comprising a driven roll and a driving roll disposed under the driven roll; and an exterior portion that is formed in the main body, disposed under the driving roll, forms an exterior face of the main body, and also forms an exterior face of the image forming apparatus body while the main body is mounted on the image forming apparatus body. | 09-29-2011 |
20110236085 | CONVEYING DEVICE, FIXING DEVICE, AND IMAGE FORMING APPARATUS - A conveying device includes: a rotating roll; a conveying belt that rotates, nipping a conveyed member between the conveying belt and the rotating roll; and a pressing member that is disposed at the inner periphery of the conveying belt and pressing the conveying belt towards the rotating roll. The pressing member includes an opposing face formed with a pressure point where the pressing force of the conveying belt towards the rotating roll is greatest, and an inclined face that is formed at the belt rotation direction upstream side relative to the pressure point. The inclined face inclines at an angle relative to a parallel line such that the inclined face separates away from the rotating roll, and the parallel line being parallel to a tangent to the rotating roll outer peripheral surface and passing through the pressure point. | 09-29-2011 |
20110236086 | CONVEYING DEVICE, FIXING DEVICE AND IMAGE FORMING APPARATUS - A conveying device includes: a rotating body that rotates; a belt that contacts the rotating body and rotates; a restricting member that is disposed at each of the two rotation axis direction side edges of the belt, positions the side edges of the belt, and restricts movement of the belt in the rotation axis direction; a lubrication agent that is supplied to the inner peripheral face of the belt; and a slide bearing that is disposed so as to overlap in the rotation axis direction with the restricting member when viewed along a rotating body radial direction, the slide bearing being open to the belt side and rotatably supporting the rotating body. | 09-29-2011 |
20110236087 | CONVEYING DEVICE, FIXING DEVICE AND IMAGE FORMING APPARATUS - A conveying device including: a rotating body that rotates; a conveying belt that rotates while nipping a conveyed member between the conveying belt and the rotating body, thereby conveying the conveyed member; a pressing member that is disposed at an inner periphery of the conveying belt along a conveying belt rotation axis direction and presses the conveying belt towards the rotating body; a pair of support members that are respectively disposed at each of two rotation axis direction edge sides of the conveying belt and that support the pressing member; and a contact member that is disposed at the inner periphery of the conveying belt along the conveying belt rotation axis direction, makes sliding contact with the rotating conveying belt, and is supported so as to be independently displaceable relative to the pressing member. | 09-29-2011 |
20120286470 | DISCHARGE MECHANISM AND IMAGE FORMING APPARATUS - A discharge mechanism includes a rotary shaft, a roller member, and a deforming unit. The roller member has a peripheral surface that is coaxial with the rotary shaft, rotates together with the rotary shaft, and discharges a medium that is in contact with the peripheral surface. The deforming unit deforms the medium in such a way that a part of the medium, the part being not in contact with the peripheral surface, passes through a position that is closer to the rotary shaft than the peripheral surface is. A part of the peripheral surface, the part being in contact with the medium, is continuously displaced in an axial direction and in a rotation direction of the rotary shaft when the roller member is rotated. | 11-15-2012 |
20130322936 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes a rotatable body; a rotatable endless belt having inner and outer peripheral surfaces; a first presser portion within the inner peripheral surface and pressing the outer peripheral surface onto the rotatable body to form a first nip, through which a recording medium passes, between the endless belt and the rotatable body; and a second presser portion within the inner peripheral surface and pressing the outer peripheral surface onto the rotatable body to form a second nip through which the recording medium passes. The first nip decreases in length in a recording-medium transport direction from a central area toward opposite ends in an axial direction. The second nip increases in length in the transport direction from a central area toward opposite ends in the axial direction, and has an upstream edge, in the transport direction, whose central area protrudes upstream relative to the opposite ends. | 12-05-2013 |
20130322940 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes a heating rotatable body; a rotatable endless belt having inner and outer peripheral surfaces; and a presser component having first and second presser portions and a recess. The first presser portion is provided within the inner peripheral surface and presses the outer peripheral surface onto the rotatable body to form a fixation nip, through which a recording medium passes, between the endless belt and the rotatable body. The second presser portion guides the recording medium by pressing the endless belt toward the rotatable body at an upstream side of the fixation nip in a recording-medium transport direction to bring the recording medium into contact with the rotatable body at the upstream side of the fixation nip. The recess is spaced apart from the endless belt and is located upstream of the first presser portion and downstream of the second presser portion in the transport direction. | 12-05-2013 |
20140314460 | SHEET PRESSING DEVICE AND IMAGE FORMING APPARATUS - A sheet pressing device includes plurality of pressing members and a support member. The plurality of pressing members is provided on a downstream side in a discharging direction of fixing unit which carries out a fixing treatment over a sheet having an unfixed image transferred thereonto along the discharging direction. The plurality of pressing members presses both ends of the sheet in a direction along a surface of the sheet carried out the fixing treatment by the fixing unit and in a direction crossing the discharging direction. The support member supports the plurality of pressing members movably in such a direction as to approach or separate from the sheet when the sheet passes through the sheet pressing device. | 10-23-2014 |