Patent application number | Description | Published |
20080267668 | DEVELOPING UNIT, PROCESS CARTRIDGE, AND IMAGE FORMING METHOD AND APPARATUS - A developing unit used in an image forming apparatus with a latent image carrier includes a developer carrier, a supply compartment, a recovery compartment, a separation member, and a gap. The developer carrier facing the latent image carrier rotates while carrying two-component developer containing toner and carrier and supplies the toner to the latent image. The supply compartment includes a supply transport member to transport the developer in a first direction. The recovery compartment includes a recovery transport member to transport the developer in a second direction. The separation member includes one end portion facing the latent image carrier at a facing area. The separation member separates the supply compartment and the recovery compartment and is disposed above the recovery compartment behind the separation member. The gap is provided at the facing area. The gap has a width of not more than 1.4 millimeters. | 10-30-2008 |
20090103943 | DEVELOPER, DEVELOPING DEVICE, IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING METHOD - A two-component developer used in an image forming apparatus including a latent image bearing member and a developing device includes a magnetic carrier and a toner. The toner includes a toner base and inorganic fine particles as an external additive. A loose apparent density of the toner is not greater than 0.39 g/cm | 04-23-2009 |
20100068645 | Carrier for developing electrostatic latent image, two-component developer, supplemental developer, process cartridge, and image forming method - A carrier for developing an electrostatic latent image which includes a core material and a resin coating layer provided on the core material. The resin coating layer includes a resin and a particulate tin oxide, and the surface of the particulate tin oxide is coated with carbon. | 03-18-2010 |
20100239975 | CARRIER FOR USE IN DEVELOPER DEVELOPING ELECTROSTATIC IMAGE, DEVELOPER USING THE CARRIER, AND IMAGE FORMING METHOD AND APPARATUS AND PROCESS CARTRIDGE USING THE DEVELOPER - The carrier includes a particulate core material having magnetism; and a resin layer located on the surface of the particulate core material. The resin layer is prepared by forming a layer including a copolymer, which includes a unit (A) having a specific acrylic siloxane structure, a unit (B) having a specific acrylic silicone structure having a crosslinking ability, and a unit (C) having a specific acrylic structure in a specific ratio, on the particulate core material, and then subjecting the layer to a heat treatment to crosslink the layer. | 09-23-2010 |
20110091802 | CARRIER, METHOD FOR PREPARING THE CARRIER, DEVELOPER USING THE CARRIER, DEVELOPER CONTAINER, AND IMAGE FORMING METHOD AND PROCESS CARTRIDGE USING THE DEVELOPER - The carrier is used for a two-component developer for developing an electrostatic latent image, and includes a particulate magnetic core material; and a cover layer located on a surface of the core material and including a crosslinked material and barium sulfate. The cover layer is formed by applying a coating medium including barium sulfate, a copolymer including a unit (A) having a specific acrylic siloxane structure including a tris(trialkylsiloxy)silanyl group and a unit (B) having a specific acrylic silicone structure having a crosslinking ability, and a condensation reaction catalyst, heating the applied medium to a temperature of from 100° C. to 230° C. so that the copolymer is hydrolyzed to produce a material having a silanol group, and the material and the catalyst are subjected to a condensation reaction to form the crosslinked material. | 04-21-2011 |
20110171573 | CARRIER, DEVELOPER USING THE CARRIER, AND DEVELOPING DEVICE, IMAGE FORMING METHOD, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE USING THE DEVELOPER - A carrier for use in a two component developer for developing an electrostatic latent image is provided. The carrier includes a particulate core material; and a cover layer located on a surface of the core material and including a silicone resin and barium sulfate. The cover layer includes Ba and Si at an atomic ratio of from 0.01 to 0.08 as determined by X-ray photoelectron spectroscopy. | 07-14-2011 |
Patent application number | Description | Published |
20080317508 | DEVELOPING DEVICE, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - A developing device capable of conveying discharged developer to the outside of the device well by preventing developer from firmly adhering within a discharge conveyance path, as well as an image forming apparatus and a process cartridge having this developing device. A developing device, having: a developing roller; a developer conveyance path having a supply screw and a supply conveyance path; a toner replenishment controller for replenishing the developer to the developer conveyance path; a discharge conveyance path for conveying the developer to the outside of the developing device; a discharge screw serving as a discharge conveying member for applying a conveying force to the developer within the discharge conveyance path; and a developer discharge port serving as developer discharge means for discharging the developer to the discharge conveyance path, wherein the conveying force is applied to the discharged developer intermittently by the discharge screw serving as a discharge conveying member, whereby a shock is applied intermittently to the discharged developer within the discharge conveyance path. | 12-25-2008 |
20090324977 | LASER-WELDABLE RESIN COMPOSITION AND MOLDED PRODUCT - A laser-weldable polybutylene terephthalate-series resin composition having a high laser weldability, a high welding strength, and a high heat shock resistance is provided. | 12-31-2009 |
20110065037 | LATENT ELECTROSTATIC IMAGE DEVELOPING CARRIER, TWO-COMPONENT DEVELOPER AND IMAGE FORMING METHOD - A latent electrostatic image developing carrier including a carrier core material, and a coating layer containing a resin and provided on a surface of the carrier core material, wherein the coating layer includes a particulate material containing at least first fine conductive particles and second fine conductive particles, and wherein the first fine conductive particles and the second fine conductive particles satisfy the relationships expressed by Expressions 1 and 2, 3≦D1/D2≦15 . . . Expression 1, where D1 denotes a dispersed particle diameter of the first fine conductive particles and D2 denotes a dispersed particle diameter of the second fine conductive particles, and −7E≦R1×R2≦8E . . . Expression 2, where R1 denotes a powder specific resistance of the first fine conductive particles and R2 denotes a powder specific resistance of the second fine conductive particles. | 03-17-2011 |
20110217649 | CARRIER, DEVELOPER, AND IMAGE FORMING METHOD - The present invention provides a carrier which includes core material particles, and a coating layer on surfaces of the core material particles, wherein the coating layer contains a crosslinked product which is obtained by condensation of a cone resin with an organic zirconium catalyst, the silicone resin having at least one of a silanol group and a functional group capable of generating a silanol group by means of hydrolysis. | 09-08-2011 |
20110229817 | CARRIER, METHOD FOR PREPARING THE CARRIER, DEVELOPER USING THE CARRIER, DEVELOPER CONTAINER, AND IMAGE FORMING METHOD AND APPARATUS AND PROCESS CARTRIDGE USING THE DEVELOPER - The carrier is used for a two-component developer for developing an electrostatic latent image, and includes a particulate magnetic core material; and a cover layer located on a surface of the particulate magnetic core material and including a crosslinked material. The crosslinked material is formed by hydrolyzing a copolymer including at least a unit (A) having a specific acrylic siloxane structure including a tris(trialkylsiloxy)silanyl group and a unit (B) having a specific acrylic silicone structure to form a material having a silanol group, and subjecting the material having a silanol group to a condensation reaction using an organic zirconium-containing catalyst. | 09-22-2011 |
20120028183 | DEVELOPING METHOD AND IMAGE FORMING METHOD - The developing method includes developing an electrostatic latent image on an image bearing member with a two-component developer including a toner and a carrier and born on at least one developer bearing member, whose surface moves at a linear speed of from 300 mm/sec to 2,000 mm/sec. The carrier includes a particulate core material; and a cover layer located on a surface of the core material and including a crosslinked material obtained by crosslinking a resin including a first unit having a specific tris(trialkylsiloxy) silyl group and a second unit having a specific alkoxysilyl group having a crosslinking ability. Each of the first unit and the second unit is included in the resin in a molar ratio of from 0.1 to 0.9 based on all the units included in the resin. | 02-02-2012 |
20120057898 | CARRIER, DEVELOPER, METHOD OF MANUFACTURING CARRIER, DEVELOPER CONTAINER, IMAGE FORMING METHOD, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND SUPPLEMENTAL DEVELOPER - A carrier including a magnetic core particle and a resin layer covering a surface of the magnetic core particle. The magnetic core particle is a ferrite particle including strontium in an amount of 0.005 to 3% by mass, measured by fluorescent X-ray spectroscopy. The resin layer comprises a resin obtained by heating a copolymer comprising a silicon-containing unit A and another silicon-containing specific unit B. | 03-08-2012 |
20120058423 | CONTACT DEVELOPING METHOD, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE - A contact developing method including supplying a two-component developer to an electrostatic latent image on a rotating image bearing member by rotating a developing sleeve and a rotatable magnet having multiple magnetic poles provided inside the developing sleeve, to develop the electrostatic latent image into a toner image. The developing sleeve and the image bearing member rotate in the same direction while facing each other. The two-component developer comprises a non-magnetic toner and a carrier. The carrier comprises a magnetic core particle and a resin layer covering the magnetic core particle. The resin layer comprises a conductive particle and a resin. The conductive particle comprises an alumina-based material and a conductive layer covering the alumina-based material. The resin is obtained by heating a copolymer comprising a monomer A unit and a monomer B unit. | 03-08-2012 |
20120064451 | CARRIER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE, AND TWO-COMPONENT DEVELOPER, SUPPLEMENTAL DEVELOPER, IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING METHOD USING THE CARRIER - A carrier comprising a magnetic core particle having a shape factor SF-2 of 130 to 160 and a resin layer covering a surface of the magnetic core particle. The resin layer comprises a conductive particle and a resin obtained by heating a copolymer comprising a silicon-containing A unit and another silicon-containing B unit having. | 03-15-2012 |
20120230725 | DEVELOPING DEVICE, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE - A developing device including a developer bearing member containing a magnetic field generator having multiple magnetic poles and a developer containing chamber is provided. The developer containing chamber contains a two-component developer comprising magnetic carrier particles having a saturated magnetization of 58 to 70 emu/g in a magnetic field of 1 KOe and toner particles, and has a divider to define an upper supply chamber and a lower collection chamber. The supply chamber includes a supply conveyer to supply the two-component developer to the developer bearing member at an upstream side from the developing area. The collection chamber includes a collection conveyer to collect the two-component developer from the developer bearing member at a downstream side from the developing area. The multiple magnetic poles includes three developer bearing poles capable of bearing the developer on its surface. | 09-13-2012 |
20130004209 | DEVELOPING DEVICE, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE - A developing device including a developer container and a developer bearing member is provided. The developer container contains a two-component developer comprising toner particles and magnetic carrier particles having a ten-point average surface roughness Rz of 0.5 to 3.0 μm. The developer bearing member is a cylindrical member containing a magnetic field generator having multiple magnetic poles. The developer bearing member is adapted to bear the two-component developer on a surface thereof and to convey the two-component developer as the surface rotates. The developer bearing member has a ten-point average surface roughness Rz of 10 to 30 μm. The multiple magnetic poles include three developer bearing poles each adapted to generate a magnetic field having a strength enough for retaining the two-component developer on a surface of the developer bearing member. The three developer bearing poles consist of a developing pole, a pre-developing pole, and a post-developing pole. | 01-03-2013 |
20130016999 | IMAGE FORMING METHOD AND IMAGE FORMING APPARATUSAANM Tohmatsu; HiroshiAACI ShizuokaAACO JPAAGP Tohmatsu; Hiroshi Shizuoka JPAANM Yaguchi; ShigenoriAACI ShizuokaAACO JPAAGP Yaguchi; Shigenori Shizuoka JPAANM Iwatsuki; HitoshiAACI ShizuokaAACO JPAAGP Iwatsuki; Hitoshi Shizuoka JPAANM Tano; ToyoakiAACI ShizuokaAACO JPAAGP Tano; Toyoaki Shizuoka JPAANM Sakata; KoichiAACI ShizuokaAACO JPAAGP Sakata; Koichi Shizuoka JPAANM Takii; MarikoAACI ShizuokaAACO JPAAGP Takii; Mariko Shizuoka JP - To provide an image forming method, containing: a charging step, a latent electrostatic image forming step, a developing step, a transferring step, and a fixing step, wherein the developing step is developing the latent electrostatic image formed on the latent electrostatic image bearing member with a two-component developer containing a toner and a carrier by a developing element to form a visible image, where the developing contains: stirring the toner and the carrier to prepare the two-component developer to have a flow energy amount of 30 mJ to 70 mJ; and periodically discharging and transporting the stirred two-component to the developer unit by air pressure to thereby supply the two-component developer for the developing. | 01-17-2013 |
20130065175 | CARRIER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE AND DEVELOPER - A carrier for developing electrostatic latent image, including a core material; and a coated layer covering the core material, including a binder resin and a particulate material, wherein the core material is exposed on the surface of the carrier at an areal ratio of from 0.1 to 5.0% and has the largest exposed part having an areal ratio not greater than 0.03%, and wherein the coated layer comprises the particulate material in an amount of from 100 to 500 parts by weight per 100 parts by weight of the binder resin. | 03-14-2013 |
20130252169 | CARRIER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE, TOW-COMPONENT DEVELOPER AND IMAGE FORMING METHOD - A carrier for developing electrostatic latent image, including a particulate magnetic core material; and a coated layer covering the surface of the particulate magnetic core material, wherein the coated layer includes a resin including a silicone resin and a methacrylic ester or an acrylic ester resin, and a filler including a substrate; and an electroconductive layer comprising tin dioxide (SnO | 09-26-2013 |
20140072910 | CARRIER FOR DEVELOPING AN ELECTROSTATIC LATENT IMAGE, DEVELOPER AND IMAGE FORMING APPARATUS - A carrier for developing an electrostatic latent image of the present invention includes a core material and a coating layer which coats the core material, wherein the coating layer includes a resin and fine particles, wherein the coating layer has an average layer thickness difference of 0.02 μm to 3.0 μm, and wherein the carrier for developing an electrostatic latent image has an arithmetic mean surface roughness Ra1 of 0.5 μm to 0.9 μm. | 03-13-2014 |
20140080052 | CARRIER FOR TWO-COMPONENT DEVELOPER, ELECTROSTATIC LATENT IMAGE DEVELOPER, AND IMAGE FORMING METHOD - A carrier for developing electrostatic latent images produced in an image developer includes a magnetic particulate core material and a covering layer covering the surface of the core material. The image developer includes an image bearer, a developer bearer including comprising a magnetic field generator inside and a developer regulation member facing the surface of the image developer with a predetermined gap. The carrier has a bulk density of from 1.6 to 2.25 g/cm | 03-20-2014 |
20140248557 | CARRIER FOR TWO-COMPONENT DEVELOPER, TWO-COMPONENT DEVELOPER USING THE CARRIER, AND IMAGE FORMING METHOD AND PROCESS CARTRIDGE USING THE TWO-COMPONENT DEVELOPER - A carrier is provided. The carrier includes a particulate magnetic core, and a cover layer located on the surface of the particulate magnetic core and including a resin and a filler. When determined from observation of cross-section of the carrier, the shape factor SF2 of the carrier is from 120 to 160, the ratio of the average domain diameter of the particulate magnetic core to the number average particle diameter of the filler is from 1:1 to 1:0.003, and the area ratio of the filler in the cover layer is from 30 to 85%. | 09-04-2014 |
20140348552 | REPLENISHING DEVELOPER HOUSING CONTAINER AND IMAGE FORMING APPARATUS - A replenishing developer housing container according to the present invention includes: a container body housing a replenishing developer; a conveying portion; a pipe receiving port; and an uplifting portion, wherein the replenishing developer contains a toner and a carrier, wherein the container body includes a protruding portion protruding from a container body interior side of the container opening portion toward one end of the container body and a curving portion curving so as to conform to the protruding portion, wherein the uplifting portion includes an uplifting wall surface extending from an internal wall surface of the container body toward the protruding portion, wherein the protruding portion is provided such that when the replenishing developer housing container is mounted on the replenishing developer conveying device, the protruding portion is present between the curving portion and the replenishing developer receiving port of a conveying pipe being inserted. | 11-27-2014 |
20150153665 | CARRIER, TWO-COMPONENT DEVELOPER, SUPPLEMENTAL DEVELOPER, IMAGE FORMING METHOD, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - There is provided a carrier including magnetic core particles; and a coating layer on a surface of each of the magnetic core particles, wherein the coating layer contains electroconductive particles; wherein the electroconductive particles are electroconductive particles in which white inorganic pigments are coated with phosphorus-doped tin or tungsten-doped tin; and wherein a dope ratio of phosphorus or tungsten to tin in the phosphorus-doped tin or tungsten-doped tin is 0.010 to 0.100. | 06-04-2015 |
Patent application number | Description | Published |
20120212160 | DISCHARGE CONTROL DEVICE OF ELECTRIC POWER CONVERSION SYSTEM - In an electric power conversion system having a discharge control device capable of discharging a voltage charged in a capacitor to a voltage of not more than a predetermined voltage, a linear regulator decreases a voltage of the capacitor and outputs the decreased voltage to a drive unit at a bottom arm in a U phase. A flyback converter for discharging use inputs an output of the linear regulator, and outputs electric power to a drive unit at an upper arm in the U phase. When detecting that own vehicle collides with an obstacle, the discharge control device starts to execute discharge control of the capacitor by turning off a photo coupler and turning on the linear regulator. | 08-23-2012 |
20120235488 | POWER CONVERTER - A power converter includes a backup power source Eb provided separately from a power source Es and designed to supply power during a discharge period, and a discharging driver Mb that turns on/off an upper-arm (one) switching element in series-connected switching elements Qu and Qd based on a drive signal that has at least one of a voltage and a frequency, and drives a lower-arm (the other) switching element Qd such that it is always on, the at least one of the voltage and the frequency of the drive signal being within a predetermined range lower than a drive signal outputted from a normal driver Mu, Md. | 09-20-2012 |
20120236617 | POWER CONVERTER - A motor control apparatus | 09-20-2012 |
20120320649 | DISCHARGE CONTROL APPARATUS FOR POWER CONVERTING SYSTEM WITH CAPACITOR - A discharge controller carries out discharge control by determining a voltage to be applied to a conduction control terminal of each of switching elements such that a current in a non-saturation region of one of the switching elements is lower than a current in a non-saturation region of the other thereof, and applying the voltage to the conduction control terminal of each switching element with an opening-closing member opening an electrical path to turn on the switching elements, resulting in short-circuit of both electrodes of a capacitor so that a discharge current is outputted from the capacitor based on the discharge control. A manipulator manipulates, based on a value of the discharge current, how to apply the voltage to the conduction control terminal of the one of the switching elements, thus controlling an amount of heat to be generated in the one of the switching elements. | 12-20-2012 |
20130181731 | INVERTER - In a test of discharging a capacitor by electrically turning on a first switching element and a second switching element that are inserted in series in a conductor connecting a positive electrode and a negative electrode of the capacitor, a discharge current that passes through the first and second switching elements tend to apply stress on the first and second switching elements. In this discharge test, while a first control signal for putting the first switching element into a low resistance state is being applied to the first switching element, a second control signal increasing a voltage thereof over time is applied to the second switching element, and application of one of or both of the first and second control signals is stopped when a current detector detects a current. Since a discharge test ends when a limited discharge current starts flowing, stress associated with the discharge test is reduced. | 07-18-2013 |
20130204477 | VEHICLE AND CONTROL METHOD THEREFOR - After a collision has been detected, all the upper arm transistors of inverters ( | 08-08-2013 |
20140309827 | MOTOR VEHICLE HAVING TRACTION MOTOR - A motor vehicle includes an electric motor, a smoothing capacitor, a discharge device and a controller. The smoothing capacitor smoothes the electric current that is used to drive the electric motor. The discharge device is capable of releasing the electric charge stored in the capacitor. The controller is configured to receive sensor data that indicates a state of the motor vehicle and determine whether to activate a discharge device, based on the sensor data received. | 10-16-2014 |
20140320047 | DRIVE SYSTEM AND VEHICLE INCLUDING DRIVE SYSTEM - A drive system includes a first switching unit, a first capacitor, a step-down circuit, a second capacitor, and a discharging unit. The first switching unit is configured to convert energy, stored in an electrical storage device, to electric power that is supplied to a motor. The first capacitor is connected to the first switching unit and configured to smooth voltage that is supplied from the electrical storage device to the first switching unit. The step-down circuit is connected to the first capacitor and configured to step down voltage of the first capacitor. The second capacitor is connected to the step-down circuit and configured to draw electric charge stored in the first capacitor. The discharging unit is configured to discharge electric charge stored in the second capacitor. | 10-30-2014 |