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Charging

Subclass of:

399 - Electrophotography

399130000 - IMAGE FORMATION

Patent class list (only not empty are listed)

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Class / Patent application numberDescriptionNumber of patent applications / Date published
399174000 Contact 69
399170000 Corona 52
399169000 Having selection of area to be charged 3
20120195642ENHANCEMENT OF DISCHARGED AREA DEVELOPED TONER LAYER - Methods for printing are provided. In one aspect a primary imaging member having a pattern of engine pixel locations with image modulated differences of potential and with first toner having a first toner difference of potential is moved to a second development station. A second development difference of potential of the first polarity at the second development station forms a second net development difference of the second development difference of potential less any image modulated difference of potential at the individual engine pixel location and less any difference of potential relative to ground of any first toner at the individual engine pixel location. The second development difference of potential is greater than the first development difference of potential so that second toner that is different from the first toner, is developed onto the first toner using the second net development difference of potential.08-02-2012
20090162099Image Forming Apparatus Including Charge Removal Member - An image forming apparatus may be provided with a belt configured to move in the predetermined direction and face a photoreceptor, a charge removal member, and a conductive member. The charge removal member may be configured to remove charge of the belt. The conductive member may be located at the downstream side of the charge removal member in the predetermined direction. The conductive member may include a surface facing the belt.06-25-2009
20100239319METHOD AND DEVICE FOR MEASURING SURFACE POTENTIAL DISTRIBUTION, METHOD AND DEVICE FOR MEASURING INSULATION RESISTANCE, ELECTROSTATIC LATENT IMAGE MEASUREMENT DEVICE, AND CHARGING DEVICE - A surface potential distribution measurement method and device including setting a sample having a surface with a surface potential distribution in a sample installation unit wherein both an electric field intensity formed on the sample surface and a potential bias component of the sample are variable, and scanning the sample surface in a one-dimensional or two-dimensional manner by irradiating a charged particle beam to the sample. The method also includes obtaining a detection signal from charged particles generated by the scanning, to measure the surface potential distribution of the sample by varying the electric field intensity and the potential bias component in order to control a quantity of the detection signal obtained from the charged particles.09-23-2010
Entries
DocumentTitleDate
20100119261Charging device and an image forming device including the same - A charging device comprises first and second electrodes forming a charging zone. A plurality of nanostructures adhere to at least one of the first and second electrodes. A charging voltage supply couples to the electrodes to support the formation of gaseous ions in the charging zone. An aperture electrode or grid proximate to the first and second electrodes is coupled to a grid control voltage supply which grid control voltage supply, in turn, controls a flow of gaseous ions from the charging zone to thereby charge a proximately-located receptor. In one embodiment, the charging voltage supply is arranged to provide a pulsed-voltage waveform. In one variation of this embodiment, the pulsed-voltage waveform comprises a pulsed-DC waveform. In another embodiment, the charging voltage supply is arranged to provide an alternating-current waveform. In one embodiment, the charging device itself is comprised in an image forming device.05-13-2010
20100067952IMAGE FORMING APPARATUS - An image forming apparatus includes a toner image carrying member, an image transfer device, a fixing device, a registration unit, a guide member, an upstream-side transportation unit, and a downstream-side transportation unit. The image transfer device transfers a toner image from the toner image carrying member to a recording medium. The fixing device fixes the toner image. The registration unit transports the recording medium. The guide member guides the recording medium. The upstream-side transportation unit includes an upstream-side transportation member, disposed at an upstream side in the transport direction of the recording medium. The downstream-side transportation unit includes the downstream-side transportation member, disposed at a downstream side in the transport direction of the recording medium. The upstream-side transportation unit includes an upstream-side positioning member to position the guide member to the upstream-side transportation member. The downstream-side transportation unit includes a downstream-side positioning member to position the guide member to the downstream-side transportation member.03-18-2010
20110013938CHARGING DEVICE, IMAGE FORMING APPARATUS, AND METHOD OF MAINTAINING GAP BETWEEN CHARGING ROLLER AND PHOTOCONDUCTIVE DRUM - According to one embodiment, a charging device includes a charging roller and gap maintaining members. The charging roller includes a conductive roller to which charging voltage is applied and a coating layer as a member for covering the outer circumferential surface of the conductive roller, ends of the coating layer being further extended by predetermined length along an extending direction of the conductive roller than end faces of the conductive roller. The charging roller charges, in a non-contact manner, a photoconductive drum arranged near the charging roller with the charging voltage applied via the conductive roller. The gap maintaining members are respectively fixed at both ends of the charging roller in positions spaced apart from the ends of the charging roller. The gap maintaining members are set in contact with the photoconductive drum while keeping a predetermined charging gap between the coating layer and the photoconductive drum and rotate together with the charging roller according to the rotation of the photoconductive drum.01-20-2011
20120224887CONDUCTIVE RUBBER ELASTIC MATERIAL, CHARGING MEMBER AND ELECTROPHOTOGRAPHIC APPARATUS - A conductive rubber elastic material is stably provided which can produce a charging member that may less vary in electrical resistance even with changes in applied voltage, promises uniform electrical properties, has charge characteristics not affected by changes in environments such as temperature and humidity, and enables a charging object member such as a photosensitive member to be kept from being contaminated. It is a conductive rubber elastic material which contains a matrix containing at least one ionically conductive rubber selected from the group consisting of epichlorohydrin rubber, epichlorohydrin-ethylene oxide rubber, epichlorohydrin-ethylene oxide-allyl glycidyl ether rubber, acrylonitrile-butadiene rubber and a hydrogenated product of acrylonitrile-butadiene rubber and domains composed of an electronically conductive rubber material containing i) a rubber having a butadiene skeleton and ii) carbon black, and the rubber having a butadiene skeleton is modified at a molecular terminal thereof with a specific atomic group.09-06-2012
20130064574CHARGING MEMBER AND METHOD OF PRODUCING THE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE-FORMING APPARATUS - Provided are the following charging member and a method of producing the charging member. The charging member has an improved charging ability and hence alleviates, in particular, a positive ghost. The charging member can maintain resistance to the adhesion of toner, a toner external additive, or the like over a long time period. The charging member for an electrophotographic apparatus comprises an electro-conductive support, an electro-conductive elastic layer, and a surface layer, wherein the surface layer comprises a polymer compound having an Si—O—Ti linkage in a molecular structure thereof, and the polymer compound has each of constitutional units represented by a formula (1), a formula (2), and a formula (3) defined in the description. The method is a method of producing the charging member.03-14-2013
20130164036CHARGING DEVICE - The present invention provides a charging device which can suppress the deterioration of a photosensitive member and the occurrence of an image deletion phenomenon on an electrophotographic image due to an electric discharge product having deposited on a charger shutter, even when having been used for a long period of time. The charging device has an image bearing member which bears an image thereon, a charging member which charges the image bearing member, and a shielding member which shields the charging member from the image bearing member, wherein the shielding member includes a specific material.06-27-2013
20110293330IMAGE FORMING APPARATUS AND GAP MAINTAINING METHOD OF CHARGING ROLLER - An image forming apparatus includes: a photoconductor that rotates about a first rotation axis; and a charging roller that rotates about a second rotation axis which is parallel to the first rotation axis, wherein the charging roller includes a conductive roller portion that extends in parallel with the first rotation axis and contains an ion-conductive agent, a flange portion that is provided on an outer peripheral surface of the conductive roller portion further to the outside than an image forming area of the photoconductor in the second rotation axis direction so as to protrude outward from the outer peripheral surface in the radial direction of the conductive roller portion into a flange shape, and an insulating elastic layer that coats the outer peripheral surface of the flange portion and has an elasticity higher than that of a photoconductive surface of the photoconductor.12-01-2011
20090311008ION GENERATING ELEMENT, CHARGING DEVICE, AND IMAGE FORMING APPARATUS - In an ion generating element, (i) an induction electrode and a heater electrode are provided away from each other on one surface of an insulating base material such that the induction electrode and the heater electrode are insulated from each other, (ii) a dielectric layer is provided on the surface of the insulating base material, and (iii) the dielectric layer has a length covering the insulating base material and the dielectric layer has openings above a ground terminal of the induction electrode and above a ground terminal and a power supply connection terminal of the heater electrode so that the terminals are exposed. As a result, it is possible to provide an ion generating element for generating ions along with creeping discharge, a charging device, and an image forming apparatus, each of which can be produced at low costs and prevent damages when unexpected troubles occur, and each of which is excellent in terms of safety.12-17-2009
20100124436IMAGE FORMING APPARATUS USING CLEANER-LESS SYSTEM - An image forming apparatus includes a rotatable photosensitive member; a charging device for electrically charging the photosensitive member; a developing device for developing with toner an electrostatic latent image formed on the photosensitive member electrically charged by the charging device; a transfer device for transferring a toner image from the photosensitive member onto an image-receiving member; and an auxiliary charging device for electrically charging untransferred toner on the photosensitive member to a normal charge polarity before the photosensitive member is electrically charged by the charging device; wherein effective widths W05-20-2010
20110217079IMAGE FORMING APPARATUS AND METHOD OF ADJUSTING GAP BETWEEN ROLLERS - According to one embodiment, an image forming apparatus includes a first roller, a second roller, and a separating mechanism. The first roller is formed in a longitudinal shape. The second roller is formed in a longitudinal shape and arranged in parallel to the first roller via a gap. The separating mechanism moves the second roller in a direction further away from the first roller such that the gap between the first roller and the second roller in a direction orthogonal to the axis direction of the second roller increases.09-08-2011
20080279588Conductive member, process cartridge including same, and image forming apparatus including the process cartridge - A conductive member includes a conductive supporting member provided facing an image bearing member and including a continuous or discontinuous fixing groove provided in the vicinity of each of both ends of the conductive supporting member in a peripheral direction thereof, an electrical resistance adjusting layer formed on the conductive supporting member and including a step portion which includes at least one step disposed in the vicinity of each of the both ends of the electrical resistance adjusting member, and gap retainers each provided to the step portion and including a cylinder portion which contacts at least one surface of the step portion, and an end plate so that a predetermined gap is formed between the image bearing member and the electrical resistance adjusting layer. The end plate contacts at least one surface of the step portion and fits into the fixing groove.11-13-2008
20130216266IMAGING MEMBERS COMPRISING FLUOROKETONE - Improved electrophotographic imaging members which pertain to the incorporation of a fluoroketone into the charge transport layer to achieve a structurally simplified flexible electrophotographic imaging member that remains flat without the need for an anticurl back coating layer. The imaging member is both more slippery and has a reduced coefficient of friction, thus extending service life.08-22-2013
20100135698POWER SUPPLY APPARATUS AND IMAGE FORMING APPARATUS - A power supply apparatus including a current regulation unit configured to regulate a surge current generated on a primary side of a piezoelectric transformer. The surge current is generated when the piezoelectric transformer including a piezoelectric element and a holding unit, which are connected to each other using a conductive rubber, is driven.06-03-2010
20110229204IMAGE FORMING APPARATUS AND CHARGING METHOD - An image forming apparatus includes a photoreceptor, a discharging device that discharges the photoreceptor, to regard a potential of the photoreceptor as a first potential, a charging device that charges the photoreceptor by proximity discharge, to regard a potential of the photoreceptor as a second potential. The charging device charges the photoreceptor for a plurality of times when changing the potential of the photoreceptor from the first potential to the second potential, and a change amount in potential of the photoreceptor in each charge is substantially the same.09-22-2011
20090220279ION GENERATING ELEMENT, CHARGING DEVICE AND IMAGE FORMING APPARATUS - An ion generating element of the present invention includes a discharge electrode and an inductive electrode, both of which are provided so as to face each other with a dielectric body sandwiched therebetween, and a heater electrode which warms the ion generating element by Joule heat produced because of a passage of an electrical current. A distance between the discharge electrode and the heater electrode is larger than that between the discharge electrode and the inductive electrode, and further a shield electrode having a connection for ground is provided between the heater electrode and the inductive electrode on a surface of the dielectric body at a side on which the inductive electrode is provided. Hence, it is possible to prevent a leak to the heater electrode at low cost, while giving consideration towards safety.09-03-2009
20090116872Charging device, and process cartridge and image forming apparatus using the same - A charging device including an electron discharging device for forming a latent electrostatic image on an image bearing member and containing an sp05-07-2009
20100183333LIGHT GUIDE AND CHARGE ELIMINATING UNIT, IMAGE FORMING APPARATUS AND IMAGE READING APPARATUS HAVING THE SAME - Disclosed are a light guide member, a charge eliminating unit and an image forming apparatus and/or an image reading apparatus having the same. The light guide member may include an incidence face through which light is introduced, an irregular reflection portion arranged along a longitudinal direction of the light guide member for irregular reflection of the light introduced through the incidence face and an emission face arranged opposite the irregular reflection portion for emission of the light. At least one recess may be formed in the incidence face for diffusion of the light introduced through the incidence face.07-22-2010
20090041501Charging Device and Image Forming Device Using Same - A charging device (02-12-2009
20090074462OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS INCLUDING SAME - An optical scanning device including a first housing including a rotating deflector configured to deflect a light beam from at least one light source to scan a surface to be scanned with a deflected light beam, a second housing including one or more reflecting mirrors, and three supporting members configured to support the second housing relative to an image forming apparatus. The first housing is mounted inside the second housing, and mounts to fix the first housing to the second housing are positioned substantially on or within sides of a triangle formed by the three supporting members.03-19-2009
20110129257CHARGING DEVICE, CARTRIDGE FOR IMAGE FORMING APPARATUS, AND IMAGE FORMING APPARATUS - A charging device includes: 06-02-2011
20100296843ELECTRON EMITTING ELEMENT, ELECTRON EMITTING DEVICE, LIGHT EMITTING DEVICE, AIR BLOWING DEVICE, CHARGING DEVICE, ELECTRON-BEAM CURING DEVICE, AND METHOD FOR PRODUCING ELECTRON EMITTING ELEMENT - An electron emitting element of the present invention includes an electron acceleration layer sandwiched between an electrode substrate and a thin-film electrode, and the electron acceleration layer includes a fine particle layer containing insulating fine particles and a basic dispersant. This makes it possible to provide an electron emitting element which does not cause insulation breakdown in an insulating layer and which can be produced at a low cost.11-25-2010
20100166463HIGH-VOLTAGE POWER SUPPLY DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - In a power supply that outputs a high voltage by driving a piezoelectric element, a switching-on time period of a switching element in an initial frequency range when the piezoelectric element starts to be driven is set to a smaller value.07-01-2010
20090324289MICRO-TIP ARRAY AS A XEROGRAPHIC CHARGING DEVICE - According to various embodiments, there is a charging device including a first conductive layer disposed over a first dielectric layer; a second dielectric layer disposed over a first conductive layer, the second dielectric layer including a plurality of cavities, wherein each of the plurality of cavities exposes a portion of the first conductive layer; a plurality of micro-tips, wherein one of the plurality of micro-tips is disposed within each of the plurality of cavities and on the first conductive layer; a second conductive layer disposed over the second dielectric layer; and a system of interconnected air flow channels disposed in the second dielectric layer and connected to the cavities, such that air injected through an air inlet exits through the plurality of cavities. The charging device can also include one or more power supplies to apply bias voltages to the first and the second conductive layers.12-31-2009
20120148306CHARGING MEMBER AND PROCESS FOR ITS PRODUCTION - To provide a charging member to the surface of which any toners and so forth can be kept from adhering and which can exhibit a stable charging performance. The charging member has a substrate, an elastic layer and a surface layer; the surface layer containing a high-molecular compound having an Si—O—B linkage and having a constitutional unit represented by the following formula (1) and a constitutional unit represented by the following formula (2).06-14-2012
20080219702IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING METHOD - A disclosed image forming apparatus includes an image carrier; one or more charging units configured to charge the image carrier in preparation for formation of each of plural latent images corresponding to toner images of different colors; a latent image forming unit configured to expose non-image areas on the charged image carrier to form each of the latent images; and developing units configured to develop the corresponding latent images in sequence with toners of the corresponding colors to form the toner images and thereby to form a color toner image composed of the toner images of the different colors on the image carrier, the toners having polarity opposite to that of the charged image carrier.09-11-2008
20080219701SQUAREWAVE CHARGING OF A PHOTORECEPTOR - Charging devices, electrostatic imaging devices, and methods generate a charging waveform having a DC bias component and an AC component for charging the imaging surface of a charge retentive member, the AC component having a substantially squarewave waveform.09-11-2008
20100158570CHARGE ELIMINATOR AND IMAGE FORMING APPARATUS HAVING THE SAME - Disclosed are a charge eliminator and an image forming apparatus having the same. The charge eliminator includes a light source array and a light guide member. The light source array includes a plurality of point light sources. The light guide member includes an incidence face through which light generated from the point light sources is introduced. The light guide member guides the light introduced through the incidence face to the photoconductor. A diffusion pattern is provided at the incidence face of the light guide member to diffuse the light introduced through the incidence face.06-24-2010
20100196050ELECTRON EMITTING ELEMENT, ELECTRON EMITTING DEVICE, LIGHT EMITTING DEVICE, IMAGE DISPLAY DEVICE, COOLING DEVICE, AND CHARGING DEVICE - An electron emitting element of the present invention includes an electron acceleration layer provided between an electrode substrate and a thin-film electrode, which electron acceleration layer includes (a) conductive fine particles and (b) insulating fine particles having an average particle diameter greater than that of the conductive fine particles. The electron emitting element satisfies the following relational expression: 0.3x+3.9≦y≦75, where x (nm) is an average particle diameter of the insulating fine particles, and y (nm) is a thickness of the thin-film electrode 08-05-2010
20120045250CHARGING MEMBER, PROCESS FOR ITS PRODUCTION, AND ELECTROPHOTOGRAPHIC APPARATUS - To provide a charging member that can not easily cause faulty cleaning. A charging member having a conductive support and an elastic layer that is a surface layer; the elastic layer having on its surface a region having been cured by irradiation with electron rays, where the region having been cured supports at least one type of spherical particles of spherical silica particles, spherical alumina particles and spherical zirconia particles in such a state that the spherical particles are exposed at least in part to the surface of the elastic layer so as to make the surface roughened.02-23-2012
20100278561ELECTRON EMITTING ELEMENT, ELECTRON EMITTING DEVICE, LIGHT EMITTING DEVICE, IMAGE DISPLAY DEVICE, AIR BLOWING DEVICE, COOLING DEVICE, CHARGING DEVICE, IMAGE FORMING APPARATUS, ELECTRON-BEAM CURING DEVICE, AND METHOD FOR PRODUCING ELECTRON EMITTING ELEMENT - An electron emitting element (11-04-2010
20100172672High voltage power supply apparatus - A high voltage power supply apparatus comprising a first circuit disposed on a prepared substrate, and for receiving a first voltage and generating a second voltage that is previously set according to the first voltage, and a second circuit for amplifying and rectifying the second voltage to generate a plurality of high voltage signals, wherein the first circuit and the second circuit are embodied as a single module, wherein at least a portion of the single module is surrounded by an insulator.07-08-2010
20110129256ELECTRON EMITTING ELEMENT, METHOD FOR PRODUCING ELECTRON EMITTING ELEMENT, ELECTRON EMITTING DEVICE, CHARGING DEVICE, IMAGE FORMING APPARATUS, ELECTRON-BEAM CURING DEVICE, LIGHT EMITTING DEVICE, IMAGE DISPLAY DEVICE, AIR BLOWING DEVICE, AND COOLING DEVICE - An electron emitting element of the present invention includes: an electrode substrate; a thin-film electrode; and an electron acceleration layer sandwiched between the electrode substrate and the thin-film electrode, the electron acceleration layer including (1) conductive fine particles, (ii) insulating fine particles having an average particle diameter greater than an average particle diameter of the conductive fine particles, and (iii) a crystalline electron transport agent. The crystalline electron transport agent is crystallized in the acceleration layer.06-02-2011
20100215402ELECTRON EMITTING ELEMENT, ELECTRON EMITTING DEVICE, LIGHT EMITTING DEVICE, IMAGE DISPLAY DEVICE, AIR BLOWING DEVICE, COOLING DEVICE, CHARGING DEVICE, IMAGE FORMING APPARATUS, ELECTRON-BEAM CURING DEVICE, AND METHOD FOR PRODUCING ELECTRON EMITTING ELEMENT - An electron emitting element of the present invention includes an electron acceleration layer between an electrode substrate and a thin-film electrode. The electron acceleration layer includes a binder component in which insulating fine particles and conductive fine particles are dispersed. Therefore, the electron emitting element of the present invention is capable of preventing degradation of the electron acceleration layer and can efficiently and steadily emit electrons not only in vacuum but also under the atmospheric pressure. Further, the electron emitting element of the present invention can be formed so as to have an improved mechanical strength.08-26-2010
20120213551IMAGE FORMING APPARATUS - An image forming apparatus includes: a rotatable photosensitive member; a charging member configured to charge the photosensitive member; a developing device configured to develop the electrostatic image formed on the photosensitive member with toner; a transferring device configured to transfer the toner image to a toner image receiving member; first and second brushes downstream of the transferring device and upstream of the charging member with respect to a rotational direction of the photosensitive member and in contact with the photosensitive member; and a device configured to apply, during image formation, to the first and second brushes voltages that are, respectively, opposite in polarity to and the same polarity as the polarity of voltage applied to the charging member. The first brush has a density lower than that of the second brush.08-23-2012
20120177407DEVELOPING DEVICE AND IMAGE FORMING APPARATUS HAVING THE SAME - A developing device and an image forming apparatus having the same. The developing device includes a space maintaining member separably coupled to an outer surface of a housing thereof. The space maintaining member restricts movement of a holder used to support a charging roller which comes into contact with a photoconductor by pressure of a pressure member, providing use convenience and operation reliability.07-12-2012
20100296842ELECTRON EMITTING ELEMENT, ELECTRON EMITTING DEVICE, LIGHT EMITTING DEVICE, IMAGE DISPLAY DEVICE, AIR BLOWING DEVICE, COOLING DEVICE, CHARGING DEVICE, IMAGE FORMING APPARATUS, ELECTRON-BEAM CURING DEVICE, AND METHOD FOR PRODUCING ELECTRON EMITTING ELEMENT - An electron emitting element of the present invention includes an electron acceleration layer that includes insulating fine particles but does not include conductive fine particles, the electron acceleration layer being provided between an electrode substrate and a thin-film electrode. This electron emitting element accelerates electrons in the electron acceleration layer and emits the electrons from the thin-film electrode, when a voltage is applied between the electrode substrate and the thin-film electrode. Accordingly, the electron emitting element of the present invention makes dielectric breakdown hard to occur. Further, this electron emitting element is produced easily at low cost and capable of emitting a steady and sufficient amount of electrons.11-25-2010
20100296844ELECTRON EMITTING ELEMENT, ELECTRON EMITTING DEVICE, CHARGING DEVICE, IMAGE FORMING APPARATUS, ELECTRON-BEAM CURING DEVICE, LIGHT EMITTING DEVICE, IMAGE DISPLAY DEVICE, AIR BLOWING DEVICE, AND COOLING DEVICE - According to an electron emitting element of the present invention, an electron acceleration layer sandwiched between an electrode substrate and a thin-film electrode contains (i) insulating fine particles and (ii) at least one of (a) conductive fine particles having an average particle diameter smaller than an average particle diameter of the insulating fine particles and (b) a basic dispersant. The electron acceleration layer has a surface roughness of 0.2 μm or less in centerline average roughness (Ra). The thin-film electrode has a film thickness of 100 nm or less. As such, according to the electron emitting element of the present invention, it is possible to reduce the thickness of the thin-film electrode to an appropriate thickness. Accordingly, it is possible to increase electron emission.11-25-2010
20120189348ELECTROSTATIC CHARGER AND IMAGE FORMING APPARATUS - An electrostatic charger (07-26-2012
20100296845ELECTRON EMITTING ELEMENT, ELECTRON EMITTING DEVICE, LIGHT EMITTING DEVICE, IMAGE DISPLAY DEVICE, AIR BLOWING DEVICE, COOLING DEVICE, CHARGING DEVICE, IMAGE FORMING APPARATUS, AND ELECTRON-BEAM CURING DEVICE - The present invention provides an electron emitting element which has good energy efficiency and which is capable of controlling a value of current flowing in an electron acceleration layer and an amount of emitted electrons by adjusting a resistance value of the electron acceleration layer and an amount of generated ballistic electrons. An electron emitting element 11-25-2010
20110158693CHARGE DEVICE AND IMAGE FORMING APPARATUS HAVING THE SAME - A charge device including an electrode arranged to face an object to be charged, and an image forming apparatus having the same. The electrode includes an electrode body made of a conductive material, a first layer made of carbon and formed on an outer surface of the electrode body, and a second layer made of a metal and formed between the electrode body and the first layer, to reduce and/or impede oxidization thereof.06-30-2011
20080219703CONDUCTIVE MEMBER, PROCESS CARTRIDGE USING CONDUCTIVE MEMBER, AND IMAGE FORMING APPARATUS USING PROCESS CARTRIDGE - A conductive member includes a conductive supporter, an electric resistance adjusting layer formed on the conductive supporter and gap retaining members which are of a different material from that of the electric resistance adjusting layer and are disposed respectively at both ends of the electric resistance adjusting layer for contacting an image carrier so as to maintain a predetermined gap between the electric resistance adjusting layer and the image carrier, wherein the electric resistance adjusting layer is made from a resin composition containing a thermoplastic resin containing an ether group, an organic phosphonium salt and a fluorine-containing organic anion salt.09-11-2008
20130094883CHARGING DEVICE, IMAGE FORMING APPARATUS, AND COMPUTER PROGRAM PRODUCT - An charging device includes: capacitors connected in series; a charging unit that charges the capacitors; bypass units, each respectively connects in parallel to each capacitors, wherein each bypass unit causes, when a charged voltage of any capacitor has reached a set voltage, a charging current to bypass the capacitor whose charged voltage has reached the set voltage; and a control unit that controls the charging unit to charge the capacitors in such a manner that, when a charging voltage of the any capacitor has reached the set voltage, the control unit causes the charging unit to reduce the charging current, and if a predetermined period has elapsed since the charging voltage has reached the set voltage, and if a charging voltage of any of the other capacitors has not reached the set voltage after the predetermined period, the control unit causes the charging unit to increase the charging current.04-18-2013
20130114977CHARGING APPARATUS AND IMAGE FORMING APPARATUS - A charging apparatus includes a latent image bearing member having a charge generating layer for generating an electric charge by receiving light energy; a light source for emitting light energy for generating the electric charge in the charge generating layer; an electrode; a bias voltage applying portion for applying a bias voltage to the electrode; and an elastic member, which is insulative and transparent, for contacting the electrode to a surface of the latent image bearing member. The electric charge is generated in the charge generating layer by reception of the light energy emitted from the light source, and the surface of the latent image bearing member is electrically charged by applying the bias voltage from the bias voltage applying portion to the electrode. The electrode is provided on the elastic member and is contacted to the surface of the latent image bearing member in a contact area and does not extend to an outside of the contact area.05-09-2013
20110236072ELECTRON EMITTING ELEMENT AND METHOD FOR PRODUCING THE SAME - The present invention provides an electron emitting element, comprising: a first electrode; an insulating fine particle layer formed on the first electrode; and comprising first insulating fine particles and second insulating fine particles larger than the first insulating fine particles, a surface of the insulating fine particle layer having a projection formed from the second insulating fine particles, and a second electrode formed on the insulating fine particle layer, wherein when a voltage is applied between the first electrode and the second electrode, electrons provided from the first electrode are accelerated in the insulating fine particle layer to be emitted from the second electrode via the projection.09-29-2011

Patent applications in class Charging

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