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Heated roller

Subclass of:

399 - Electrophotography

399130000 - IMAGE FORMATION

399320000 - Fixing (e.g., fusing)

399328000 - By heat and pressure

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
399333000 Composition or layers 107
399331000 Pressure rollers 46
399334000 Axial heat distribution 4
20100278570FIXING DEVICE AND IMAGE FORMING APPARATUS - In an image forming apparatus having a fixing rotor (11-04-2010
20120014727FIXING DEVICE AND IMAGE FORMING APPARATUS - In a fixing device thermally fixing toner images on recording sheets of various sizes, (i) a conductive heat generating rotational body configured to heat toner images, (ii) an excitation coil positioned along a part of an outer circumferential surface of the heat generating rotational body and configured to generate a magnetic flux to heat the heat generating rotational body by electromagnetic induction, and (iii) a demagnetization coil positioned close to the excitation coil so as to cover a part of the excitation coil and configured to cancel, when a toner image is being fixed on a smaller-sized recording sheet, a part of the magnetic flux generated by the excitation coil so that overheating is prevented in a non sheet-passing region, are provided. The demagnetization coil has a thickness smaller than a thickness of the excitation coil in an axis direction of the coils.01-19-2012
20120177424FIXING DEVICE, IMAGE FORMING APPARATUS INCORPORATING SAME, AND METHOD FOR HEATING FIXING ROTARY BODY - A fixing device includes an induction heater constructed of an exciting coil, a first pair of degaussing coils, and a second pair of degaussing coils. A controller turns off the exciting coil while the controller turns on one of the first pair of degaussing coils and the second pair of degaussing coils and at the same time turns off the other one of the first pair of degaussing coils and the second pair of degaussing coils, and then turns on the exciting coil for an extra time period corresponding to reserved power not supplied to the exciting coil while the exciting coil is turned off.07-12-2012
20120020710FIXING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A fixing device includes a heating rotating member that generates heat by induction heating; an induction coil that generates magnetic flux for induction heating; and a magnetic member core section forming a magnetic path and including a first core section, a second core section, a magnetic flux shielding member, and third core sections. The magnetic flux shielding member is disposed at a side of an end portion of the first core section opposite to the second core section and separated from the end portion, and disposed at a position that is separated from the outer surface of the heating rotating member by a separation distance. The third core sections are disposed at a side of the magnetic flux shielding member facing the end portion of the first core section. At least one of the third core sections is movable to a first position and to a second position.01-26-2012
Entries
DocumentTitleDate
20090196664IMAGE HEATING APPARATUS - An image heating apparatus includes a contact-sliding member parallel to a generatrix of a heating roller and brought into contact with the heating roller configured to heat a toner image on a recording material. An inlet space and an outlet space are formed at the upstream and downstream ends, respectively, of a contact area. A cleaning member, provided on the downstream side of the contact area, cleans the surface of the heating roller to remove toner and paper dust from the surface of the heating roller.08-06-2009
20090123203IMAGE HEATING APPARATUS AND IMAGE HEATING ROTATIONAL BODY TO BE MOUNTED ON THE IMAGE HEATING APPARATUS - According to embodiments, a heating member or a sliding member arranged in contact with the surface of a fusing roller is moved in an intersecting direction with the rotational direction of the fusing roller in a contact state with the heating member or the sliding member so as to prevent a scratch from being generated on the surface of the fusing roller or to repair the scratch.05-14-2009
20130078019FUSING DEVICE AND METHOD USING INDUCTION HEATING AND IMAGE FORMING APPARAUS INCLUDING THE FUSING DEVICE - An induction heating fusing device and method of an image forming apparatus including: a pressure roller; a heating element that forms a fusing nip together with the pressure roller and is rotatable; an inductor that is installed in a rotation axis direction on the outer circumference surface of the heating element, includes a main coil and a plurality of control coils located on the main coil, and inductively heats the heating element; and a controller that selectively drives at least one of the plurality of control coils depending on the width of a printing paper passing though the fusing nip, and controls the main coil and the plurality of control coils so that a current direction of the main coil and a current direction of the plurality of control coils become the same as or opposite to each other depending on the width of the printing paper.03-28-2013
20130045033IMAGE HEATING APPARATUS WITH ROTATABLE HEAT GENERATION MEMBER CAPABLE OF INDUCTION HEAT GENERATION BY A MAGNETIC FLUX - An image heating apparatus for heating an image on a recording material, includes a rotatable heat generation member capable of induction heat generation by a magnetic flux; a coil, provided outside the heat generation member, for generating the magnetic flux for the induction heat generation; a movable magnetic core provided at a position opposed to the coil; a moving device for moving the magnetic core between a first position opposed to the coil and a second position which is more away from the coil than the first position; and an electroconductive member mounted at a position where a magnetic circuit is capable of being formed with the coil when the magnetic core is in the second position.02-21-2013
20090269109IMAGE FORMING APPARATUS - An image forming apparatus includes an image forming unit and a fixing unit. The fixing unit includes a heating member; a coil arranged along an outer surface of the heating member for generating a magnetic field for induction heating the heating member; a core arranged to face the heating member with the coil located therebetween in order to form a magnetic path around the coil and made of a magnetic material; a shielding member arranged near the magnetic path generated by the coil, including a closed frame portion and made of a nonmagnetic metal; and a magnetic shielding portion for displacing the shielding member between a retracted position for permitting a magnetic flux to pass along a frame surface virtually formed inside the closed frame portion and a shielding position for shielding magnetism by the penetration of a magnetic flux inside the frame surface.10-29-2009
20090010689Image forming unit and image forming apparatus - An image forming unit includes an image bearing body, a rotating body disposed in contact with or disposed facing the image bearing body, a supporting member that supports a rotation shaft of the rotating body, an insertion hole provided on the supporting member, a bearing inserted into the insertion hole and supporting the rotation shaft of the rotating body, and three or more contact portions provided on the bearing or the insertion hole. The contact portions contact the insertion hole or the bearing.01-08-2009
20080219729HEAT FIXING MEMBER AND HEAT FIXING ASSEMBLY - In a heat fixing member which is a seamless type cylindrical heat fixing member having an elastic layer, the elastic layer is mixed with carbon fibers, and the elastic layer has a thermal conductivity of 1.0 W/(m·K) or more in the thickness direction thereof. A heat fixing member is provided which is more improved in the thermal conductivity in the thickness direction, can efficiently supply heat to the heating object (recording medium) at the time of high-speed printing, can give fixed images having a high glossiness in virtue of the elastic layer, which has secured a sufficient flexibility. A high-performance heat fixing assembly is also provided which can conduct sufficient heat to toner images even if the dwell time is shortened.09-11-2008
20110293341Fixing Device - A fixing device includes a heat roller and a heater. The heat roller extends in an axial direction and includes a cylindrical-shaped roller section and a coil, the roller section having an inner peripheral surface defining an internal space therewithin and the coil being wound along the inner peripheral surface, the heat roller being configured of a plurality of zones in the axial direction, the plurality of zones including a low zone whose heat capacity is less than a predetermined value and a high zone whose heat capacity is not less than the predetermined value. The heater is disposed within the internal space of the roller section and has a heating wire configured to generate heat, the heating wire having at least a first portion which is in confrontation with the high zone and a second portion which is in confrontation with the low zone, and the heating wire being configured such that the first portion has an amount of heat generation greater than an amount of heat generation at the second portion.12-01-2011
20090148205FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes a heat applying system having an exciting coil that creates a magnetic flux for generating induction heat in a heat generation layer provided in a fixing roller. Plural demagnetizing coils are stacked in plural layers partially overlying the exciting coil to cancel the magnetic flux at one end of the fixing roller. The plural demagnetizing coils partially overlap each other.06-11-2009
20100266319HEAT GENERATION UNIT AND HEATING APPARATUS - In a heat generation unit, an elongated sheet-like heat generator (10-21-2010
20090103958INDUCTION HEATING FIXING DEVICE FOR IMAGE FORMING APPARATUS - In an embodiment of the present invention, one side of first and second side coils formed by winding a Litz wire plural times are formed by bending the Litz wire and the other sides thereof are formed by simply winding the Litz wire without bending the same. The bent one ends of the first and second side coils are arranged to be adjacent to a center coil and the other ends simply wound without being bent are arranged to be opposed to both ends of a heat roller.04-23-2009
20080292376THERMAL FIXING DEVICE AND IMAGE FORMING DEVICE - The contact rate between a heater 11-27-2008
20090245901Thermal Fixing Unit Having Pivotally Movable Pressure Pad and Image Forming Device Provided with the Same - There is provided a thermal fixing unit that fixes a toner image on a printing medium, the fixing unit including a heat member, a pressure pad, a movable supporting assembly, and an urging member. The heat member is in contact with the printing medium, being positionally fixed and defining an axis. The pressure pad is disposed in opposition to the heat member for nipping the printing medium in cooperation with the heat member. The supporting assembly pivotably movably supports the pressure pad. The urging member biases the supporting assembly to urge the pressure pad toward the heat member for providing pressure contact between the heat member and the pressure pad.10-01-2009
20110229229Fixing Device - A heater is inserted into a roller through-hole of a heating roller body. An attached portion of a terminal plate is attached to a power supply terminal provided on one end of the heater. An engaging portion is a plate member extending from the attached portion in a first radial direction of the heating roller body and arranged in parallel with a longitudinal direction of the heater. The engaging portion is engaged with the fixing frame. An engaging terminal portion is a plate member extending from the attached portion in a second radial direction of the heating roller body and intersects with the longitudinal direction of the heater. The second radial direction is a direction the same as the first radial direction.09-22-2011
20120195655FUSER AND IMAGE FORMING DEVICE INCLUDING THE SAME - A fuser includes a first roller that includes a first elastic layer, a belt member provided on, and rotates around, the first roller, a second roller that includes a second elastic layer and that forms a nip part by pressing, through the belt member, the first roller, and a heating member that heats the belt member. A thickness of the second elastic layer of the second roller is less than a thickness of the first elastic layer of the first roller.08-02-2012
20100014900IMAGE FORMING APPARATUS - A fixing unit of an image forming apparatus includes a magnetism adjusting unit switching the position of a shielding member between a shielding position where the shielding member is positioned inside the sheet-conveyed region to shield the pass of the magnetism and a retracted position where the shielding member is positioned outside the sheet-conveyed region to permit the pass of the magnetism. The shielding member is provided in a plural number in the axial direction of the movable core. The shielding members have a different length in the axial direction and a different width in a circumferential direction of the movable core, the length and the width corresponding to a plurality of sizes of the sheet in the width direction of the sheet. The magnetism adjusting unit switches each of the shielding members between the shielding position and the retracted position in accordance with the width-direction size of the sheet.01-21-2010
20130216284FUSER DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH SAME - A magnetic core surrounds a coil and has a plurality of first core sections arrayed along the widthwise direction of a recording medium orthogonally to the conveyance direction of the recording medium, and a second core section disposed at both ends in the widthwise direction within a hollow section of the coil. The second core section is formed so that the cross-sectional area thereof in the conveyance direction of the recording medium grows progressively larger from the center of the widthwise direction towards the end thereof.08-22-2013
20090028616FIXING ROLLER, METHOD OF MANUFACTURE THEREOF, AND FIXATION ASSEMBLY AND IMAGE-FORMING APPARATUS EMPLOYING THE ROLLER - A coil spring 01-29-2009
20110081175IMAGE FORMING APPARATUS AND FUSER UNIT - According to one embodiment, a fuser including, a first endless member including a gel-like silicone material and configured to apply heat to an object, a second endless member configured to apply pressure to the first endless member, and a heat source configured to raise temperature of the first endless member to predetermined temperature.04-07-2011
20090022528FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device is provided in image forming apparatuses such as a printer and the like and performs a fixing by heating to a recording sheet on which a toner image is transferred. The fixing device includes: a heating source adapted for performing fixing of a toner image onto a recording medium by heat; a fixing roller including a thin-wall cylinder rotatable about an axis thereof and carrying the heating source therein, the recording medium being placed on a peripheral surface of the cylinder; an annular heat-insulating member coaxially mounted on an outside surface of the fixing roller; and a C-shaped stopper attached to the peripheral surface of the fixing roller for preventing the annular heat-insulating member from moving out of the fixing roller, the C-shaped stopper including at least three engaging portions.01-22-2009
20080205949Fixing unit - A fixing unit includes: a heat roller that is rotatably supported and that supplies heat for fixing; and a first and a second tubular heaters that are disposed in parallel in the heat roller along an axis thereof and that each have on an outer circumferential surface thereof one protruding residual fused tip, namely, tip portion. As viewed from a side end surface of the heat roller, the tip portions of the first and second tubular heaters are oriented directly opposite to each other with respect to the connection line connecting centers of the first and second tubular heaters.08-28-2008
20110052283HEAT GENERATING UNIT AND HEATING APPARATUS - A heat generating element (03-03-2011
20090067903COIL UNIT FOR INDUCTION HEATING FIXING DEVICE - In an embodiment of the present invention, an electromagnetic induction coil, insulating plates, and a magnetic core are positioned by a coil holder including holder plates on which ribs are integrally formed. Consequently, the electromagnetic induction coil is regulated from sliding on the holder plates and fixed in a desired proper position regardless of flows of a mold material caused when a coil mold is injection-molded.03-12-2009
20100166470IMAGE FORMING APPARATUS AND FIXING DEVICE - According to one embodiment, an image forming apparatus includes an image forming portion to form an image on a sheet, a heating rotation portion to heat the sheet to fix the image on the sheet, and a coil to provide magnetic flux to the heating rotation portion, one end of the coil is closer to the heating rotation portion than another end of the coil in a direction of an axis of rotation of the heating rotation portion.07-01-2010
20090175664IMAGE FORMING APPARATUS - A fixing unit (07-09-2009
20110188909Fixing Device Having Adjustment Mechanism for Adjusting Sheet Discharging Direction - A fixing device for thermally fixing a developing agent image to a sheet fed in a sheet feeding direction includes: a tubular flexible fusing member; a heater; a nip member; a resiliently deformable backup member; and an adjustment mechanism. The tubular flexible fusing member has an inner peripheral surface defining an internal space. The heater is disposed in the internal space and configured to radiate radiant heat. The nip member is disposed in the internal space and configured to receive the radiant heat from the heater. The inner peripheral surface is in sliding contact with the nip member. The resiliently deformable backup member is configured to provide a nip region in cooperation with the fusing member upon nipping the fusing member between the backup member and the nip member. The adjustment mechanism is configured to move the nip member between a first position and a second position different from the first position in the sheet feeding direction to adjust the sheet feeding direction.08-04-2011
20110188908Fixing Device Having Adjustment Mechanism for Adjusting Sheet Discharging Direction - A fixing device for thermally fixing a developing agent image to a sheet fed in a sheet feeding direction including: a tubular flexible fusing member; a heater; a nip member; a resiliently deformable backup member; and an adjustment mechanism. The tubular flexible fusing member has an inner peripheral surface defining an internal space. The heater is disposed in the internal space and configured to radiate radiant heat. The nip member is disposed in the internal space and configured to receive the radiant heat from the heater. The inner peripheral surface is in sliding contact with the nip member. The resiliently deformable backup member is configured to provide a nip region in cooperation with the fusing member upon nipping the fusing member between the backup member and the nip member. The adjustment mechanism is configured to move the backup member between a first position and a second position different from the first position in the sheet feeding direction to adjust the sheet feeding direction.08-04-2011
20100092221FIXING DEVICE AND IMAGE FORMING APPARATUS WITH HEATING MEMBER HEATED UNIFORMLY IN CIRCUMFERENTIAL DIRECTION - In a fixing device, a belt moves in a predetermined direction to heat and melt a toner image on a recording medium. A pressing rotary member is pressed against the belt to form a nip portion to nip and convey the recording medium bearing the toner image. A heating member is fixedly provided inside a loop formed by the belt and faces an inner circumferential surface of the belt. The heating member is heated by a heater to heat the belt. The heating member includes a primary heating portion directly heated by the heater, and a secondary heating portion heated by heat conducted from the primary heating portion. The primary heating portion and the secondary heating portion are provided in a circumferential direction of the heating member. The secondary heating portion has a heat capacity smaller than a heat capacity of the primary heating portion.04-15-2010
20100046996FIXING UNIT AND IMAGE FORMING APPARATUS COMPRISING FIXING UNIT - A fixing unit for fixing a toner image onto paper has a member to be heated and a pressurizing member configured to press against the member to be heated and fix the toner image to the paper. At least one coil surface is disposed along one surface of the member to be heated and includes a coil to generate a magnetic field for inductively heating the member. A magnetism shielding member is disposed near the coil surface. A switch includes a first member to allow passage of the magnetic field and a second member to prevent passage of the magnetic field. The amount of heat for the member when the switch is in a first position where the second member is close to the magnetism shielding member is smaller than when the switch is in a second position where the second member is distanced from the magnetism shielding member.02-25-2010
20110236091FIXING DEVICE, IMAGE FORMING APPARATUS INCLUDING THE SAME AND ELECTROMAGNETIC-INDUCTION HEATING UNIT - A fixing device for fixing a toner image on a recording medium includes a toner fusing unit that is operable to fix the toner image on the recording medium and that includes a pressure member and a heating member in contact with the pressure member to form a fixing nip therebetween; an electromagnetic-induction heating unit having a coil disposed along an outer surface of the heating member and configured to generate a magnetic flux for applying induction heating to the heating member, and a core unit disposed opposite the heating member with the coil interposed therebetween to provide for a magnetic path around the coil, the core unit being configured to rotate about an axis extending across the width of the recording medium; and a drive unit formed integrally with the electromagnetic-induction heating unit and configured to rotate the core unit.09-29-2011
20130017004IMAGE FORMING APPARATUS HAVING FIXING DEVICE THAT RESPONDS TO REQUEST WHEN USING DECOLORABLE INK - An image forming apparatus includes: a first image forming unit which forms a first image on a first recording medium with a first material which is not thermally decolorized; a second image forming unit which forms a second image on a second recording medium with a second material which is thermally decolorized; a fixing unit which is on a common carrying path shared by the first recording medium and the second recording medium and fixes the first image to the first recording medium; and a control unit which controls the fixing unit so that the temperature of the second recording medium passing through the fixing unit becomes lower than a decolorizing temperature of the second material.01-17-2013
20080219728IMAGE FORMING APPARATUS AND FIXING UNIT THEREOF - An image forming apparatus and a fixing unit thereof are disclosed. The fixing unit includes a heating roller, a press roller mounted in close contact with the heating roller to apply heat and pressure to the printable medium with the heating roller, a press lever to press the press roller toward the heating roller, a press spring connected to the press lever, a release device to operate the press lever to release pressing force exerted on the press roller, and a power conversion device to transmit driving power generated from a main driving source to drive the heating roller to the release device. Accordingly, since the press lever pressing the press roller to closely contact the heating roller can be operated by the driving power of the main driving source, the jammed printable medium can be easily removed.09-11-2008
20080219727IMAGE FORMING APPARATUS - An image forming apparatus to shorten a warm-up time required to fuse a visible image to a printing medium is provided. The image forming apparatus includes an indirect heating member to indirectly transfer radiant heat to the visible image formed on the printing medium passing through the fusing nip, and a direct heating member to directly transfer resistance heat to the visible image formed on the printing medium passing through the fusing nip. Accordingly, since the radiant heat generated from the indirect heating member heats the direct heating member, a heating rate of the direct heating member increases, and the warm-up time required to reach a predetermined fusing temperature to fuse the visible image is shortened.09-11-2008
20130094887IMAGE HEATING APPARATUS - An image heater a hollow heating roller having a hole at an axial end portion thereof; a bearing supporting the heating roller; a heat insulating bush fitted between an outer surface of the heating roller and the bearing; a retaining ring for retaining the heat insulating bush in an axial direction of the heating roller, the retaining ring including a projection engaging with the hole; an annular spacer provided between the retaining ring and the heat insulating bush, wherein the spacer includes a connecting portion having a connecting hole, the retaining ring includes a hooking portion engaging with the connecting hole.04-18-2013
20120027479ROTATABLE IMAGE HEATING MEMBER AND IMAGE HEATING DEVICE - An image heating device includes a rotatable image heating member including an elastic layer and a surface layer in which a filler is dispersed; and a fixed pressing member which is contacted to a surface of the rotatable image heating member and forms a nip, between itself and the rotatable image heating member, in which a recording material for carrying an image is to be nip-conveyed. The surface of the rotatable image heating member has a shape such that projections are distributed by the filler so that a coefficient of dynamic friction μ(hot) relative to said fixed pressing member when a surface temperature of the rotatable image heating member is a temperature during image heating and a coefficient of dynamic friction μ(cold) relative to the fixed pressing member when the surface temperature is a normal temperature satisfy,02-02-2012

Patent applications in class Heated roller

Patent applications in all subclasses Heated roller