Class / Patent application number | Description | Number of patent applications / Date published |
399127000 | SUPPLEMENTAL ELECTROPHOTOGRAPHIC PROCESS | 51 |
20110008069 | IMAGE FORMING APPARATUS - An image forming apparatus including a latent image bearing member, a charger, an irradiator, a developing member, a transfer device, and a surface potential equalizer. The transfer device includes an intermediate transfer member comprising a high-resistivity body having a surface resistivity of 10 | 01-13-2011 |
20110170908 | Lubricant supplying device, process cartridge, and image forming apparatus - A lubricant applying unit that applies lubricant to a photosensitive element includes solid lubricant blended with fatty acid metal salt, a lubricant supplying brush roller, a lubricant applying blade, and a biasing unit of the solid lubricant. In addition, a lubricant applying unit that applies lubricant to an intermediate transfer belt includes solid lubricant blended with inorganic lubricant, a lubricant supplying brush roller, a lubricant applying blade, and a biasing unit of the solid lubricant blended with the inorganic lubricant. | 07-14-2011 |
20130108322 | Process Unit and Image Forming Device Including the Same | 05-02-2013 |
399128000 | Exposure or charging (e.g., fatigue treatment) | 48 |
20080292358 | OPTICAL SCANNING UNIT AND ELECTRO-PHOTOGRAPHIC IMAGE FORMING APPARATUS INCLUDING THE SAME - An optical scanning unit that includes a first optical device that forms collimated light from light radiated from a light source, a second optical device that focuses the collimated light onto a deflector, and an imaging optical device that focuses light deflected by the deflector onto an exposure object. The optical scanning unit further includes a refraction unit and a diffraction unit, and the power of the refraction unit is φr, the power of the diffraction unit is φd, and the ratio φr/φd is such that 0.5<φr/φd<1.3. | 11-27-2008 |
20090022517 | IMAGE FORMING APPARATUS - An inexpensive image forming apparatus, which can suppress a ghost to obtain an image maintaining satisfactory density and gradations for a long time. The apparatus including an electrophotographic photosensitive member, a contact charger in contact with the photosensitive member for charging the photosensitive member, a charging voltage applying device for applying direct current voltage to the contact charger, a charging current detector for detecting electric current flowing through the contact charger, a pre-exposure device for exposing the photosensitive member to light to remove residual charge on the photosensitive member, and a pre-exposure light amount controller for controlling an exposure light amount of the pre-exposure device in image formation based on the results of detection by the charging current detector when the exposure light amount of the pre-exposure device is changed with direct current voltage applied from the charging voltage applying device to the contact charger during non-image formation. | 01-22-2009 |
20090060574 | IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - An image forming apparatus comprising an image holding member that is rotationally driven, the image holding member comprising, on a substrate, a subbing layer and a photosensitive layer, a volume resistance value of the subbing layer decreasing in a rotation axis direction of the image holding member, from one end portion of a light source side of the image holding member towards another end portion of the image holding member, a charging unit, a latent image formation unit, a developing unit, a transfer unit, and a charge removal unit comprising a light source that, after transfer of the toner image, irradiates the surface of the image holding member from one side thereof, in a rotation axis direction of the image holding member, with charge removing light, to remove the charge from the surface of the image holding member. | 03-05-2009 |
20090074458 | IMAGE FORMING APPARATUS AND CHARGE REMOVING DEVICE THEREOF - An image forming apparatus and a charge removal device thereof capable of evenly irradiating light to a photosensitive body are disclosed. The charge removal device includes a charge removal lamp, which may be mounted outside the length of the photosensitive body, and the optical axis of which forms an angle with respect to the surface of the photosensitive body, and a lens provided between the photosensitive body and the charge removal lamp. The lens can collimate or make less divergent the light beam emitted by the charge removal lamp, and directs the collimated or less divergent light beam onto the surface of the photosensitive body. The light beam from the lens may be incident upon an area of the surface extending across the length of the photosensitive body. | 03-19-2009 |
20090087219 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - The image forming apparatus including: a photoconductor provided with a charge generation layer and an overcoat layer; a first charging unit charging the photoconductor when an image is formed; an exposure unit irradiating the photoconductor with light having a wavelength to which a relative sensitivity of the charge generation layer is larger than a relative sensitivity of the overcoat layer; a development unit developing an electrostatic latent image formed on the photoconductor by the first charging unit and the exposure unit with toner; a transfer unit transferring an image developed on the photoconductor to a medium; a light irradiation unit irradiating the photoconductor with light having a wavelength to which the relative sensitivity of the overcoat layer is larger than the relative sensitivity of the charge generation layer; and an erasing unit erasing a charge from the photoconductor irradiated with light by the light irradiation unit. | 04-02-2009 |
20090097880 | LIGHT IRRADIATION ELEMENT, IMAGE FORMING STRUCTURE, AND IMAGE FORMING APPARATUS - A light irradiation element includes a cavity through which light passes and a translucent light conduit bordering the cavity, allowing light to pass therethrough and transmitting the light passed through the cavity, the light irradiation element being disposed along a longitudinal direction of an image bearing body on which an electrostatic latent image is formed and directing the light passed through the light conduit to irradiate the image bearing body. | 04-16-2009 |
20090324286 | Discharger and Process Cartridge - A discharger is provided, which can eliminate charge from a surface of a photoconductor. The discharger includes: a light source; a light guide member; a cover which covers the light guide member to expose at least an opposed surface of the light guide member to the photoconductor; and an adhesive tape which uses nonwoven fabric as a substrate, which is disposed between the light guide member and the cover so that the opposed surface of the light guide member is disposed between the tape and the photoconductor, and which bonds the light guide member and the cover to each other. | 12-31-2009 |
20090324287 | Discharger and Process Cartridge - A discharger is provided, which can eliminate charge from a surface of a photoconductor. The discharger includes: a light source; and a light guide member which extends in a first direction to be opposed to the surface of the photoconductor in a second direction substantially orthogonal to the first direction. The light guide member has a plurality of holes, each defined by a hole surface. At least a portion of the hole surface is curved. The hole extends in an orthogonal direction substantially orthogonal to the first and second directions. | 12-31-2009 |
20110013937 | IMAGE FORMING APPARATUS - An image forming apparatus is constituted by a rotatable image bearing member; a charging member for electrically charging the image bearing member in contact with the image bearing member; developing member, containing polishing particles, for collecting toner from the image bearing member and effecting development on the basis of an electrostatic latent image formed on the image bearing member; a transfer member for transferring a toner image formed on the image bearing member onto a transfer material; an auxiliary charging member, located downstream from a transfer portion and upstream from the charging member with respect to a movement direction of the image bearing member, for electrically charging toner remaining on the image bearing member after the transfer by contact with the image bearing member; and control means for performing a discharging mode, for discharging polishing particles from the auxiliary charging member onto the image bearing member on the basis of an image ratio of an image to be formed, during non-image formation by applying a voltage to the auxiliary charging member under a condition different from a condition for applying a voltage to the auxiliary charging member during image formation. | 01-20-2011 |
20110020034 | IMAGE FORMING APPARATUS HAVING CHARGE ELIMINATOR - An image forming apparatus includes an image carrying body having a surface on which a toner image is formed. A charger charges the surface body and a charge eliminator removes charge from the surface. The charge eliminator includes light sources to generate charge elimination light and a light guide to guide the charge elimination light onto the surface. The light guide includes a first portion to guide the charge elimination light onto an axial central portion of the image carrying body and a second portion to guide the charge elimination light onto axial end portions of the image carrying body. The second light guide portion allows charge elimination light that is incident on the first light guide portion to travel into the second light guide portion, but restricts charge elimination light that is incident on the second light guide portion from traveling into the first light guide portion. | 01-27-2011 |
20110058850 | IMAGE FORMING APPARATUS - When a charging member charge a photosensitive member by being applied with a direct-current voltage, a gap between the charging member and the photosensitive member is exposed to light with a constant light amount. However, if the process speed is lowered, charging non-uniformity occurs. Therefore, when the process speed is low, the amount of light radiated to the charging gap is made higher than that when the process speed is low. | 03-10-2011 |
20110129254 | Neutralization device, developing device and image forming apparatus - A neutralization device includes a light emitter, an optical conductor and multiple diffusion portions. The light emitter emits light for neutralizing an object. The optical conductor, which is opposed to the object and extends in a longitudinal direction, directs and applies the light to the object. The diffusion portions are arranged on the optical conductor in a zig-zag manner from one end of the optical conductor to the other and diffuse the light. | 06-02-2011 |
20110217076 | LIGHT 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. | 09-08-2011 |
20110243609 | CHARGE-REMOVING DEVICE - In the charge-removing device, the light guide portion extends in a first direction. The light guide portion guides light from the light source toward the surface of the image-bearing member. A charge on the surface of the image-bearing member is removed by the light emitted from the light guide portion. The first surface of the light guide portion opposes the light source. The rear surface is an opposite surface of the confronting surface and has a rough surface part that reflects, toward the confronting surface, the light from the first surface. The closer a position of the increasing portion is to the second surface, the larger the length of the increasing portion becomes. The closer a position of the decreasing portion is to the second surface, the smaller the length of the decreasing portion becomes. | 10-06-2011 |
20110249987 | IMAGE-FORMING APPARATUS - An image-forming apparatus is equipped with a neutralization light source that is disposed between a primary transfer position and the cleaning unit, in a direction of rotation of the first image carrier that composes the image-forming unit; irradiates a first neutralization light from a position opposing the primary transfer position on a first image carrier up to a position opposing the cleaning unit; and irradiates a second neutralization light from a position opposing the developer unit for a second image carrier that composes an image-forming unit disposed adjacent to the image-forming unit at a downstream side in the direction of transfer belt rotation, up to a position opposite the primary transfer position. | 10-13-2011 |
20120321347 | PHOTORECEPTOR CHARGING AND ERASING SYSTEM - Two thick film charging devices or a common thick film charge device with two separated obverse conductors, sharing a common power supply are used for photoreceptor charge and erase. The thick film charging devices use a set of AC biased electrodes supported on a dielectric material which also support a counter electrode on an opposite side of the dielectric. A DC offset applied to the counter electrodes is used to set photoreceptor charge level. One DC voltage is used for photoreceptor charge and a zero or near zero DC voltage is used to erase residual charge for the photoreceptor. | 12-20-2012 |
20120328332 | IMAGE FORMING APPARATUS WITH NEUTRALIZER AND IMAGE FORMING METHOD - An image forming apparatus including an image bearing member, a charger, an irradiator, a developing device, a transfer device, a neutralizer, and a varying device is provided. The neutralizer is adapted to neutralize the image bearing member by emitting neutralization light thereto, after a toner image formed on the image bearing member is transferred therefrom. The varying device is adapted to vary an amount of the neutralization light to be emitted to the image bearing member by pulse-width modulation of a voltage to be supplied to the neutralizer. The image forming apparatus satisfies the following formula: | 12-27-2012 |
20130004204 | COLOR IMAGE FORMING APPARATUS - An image forming apparatus includes a process unit arranged in the vicinity of the circumference of each photosensitive member and the process unit is configured to act on the photosensitive member in forming a toner image thereon. The image forming apparatus detects a time period since a laser beam emission unit emits a laser beam to the photosensitive member to form an electrostatic latent image for detection until the formed electrostatic latent image for detection or a toner image based on the electrostatic latent image for detection reaches the process unit, and performs color misregistration correction control based on the result of detection. In this case, a control unit at least decreases the light amount of a pre-exposure LED when the electrostatic latent image for detection passes through a position facing the pre-exposure LED. | 01-03-2013 |
20130045027 | ELECTRICAL RECONDITIONING FOR PRINTER PHOTORECEPTOR - Apparatus for electrically reconditioning a rotatable photoreceptor in an electrophotographic (EP) printer includes a charger, an exposure subsystem, a transfer station, and an erase lamp arranged in that order around the photoreceptor in the direction of rotation thereof. A first corona electrode is disposed within 3 cm of the surface of the photoreceptor, but not in contact therewith, between the transfer station and the erase lamp. The transfer station and the erase lamp are at most 1 cm apart. A second corona electrode is disposed within 3 cm of the surface of the photoreceptor, but not in contact therewith, after the erase lamp in the direction of rotation of the photoreceptor. The erase lamp and the second corona electrode are less than 1 cm apart. | 02-21-2013 |
20130045028 | RECONDITIONING ROTATABLE PHOTORECEPTOR IN ELECTROPHOTOGRAPHIC PRINTER - An electrophotographic photoreceptor is prepared for charging. Corona electrodes before and after the erase lamp apply respective biases to provide the correct sign of charge for cleaning, and to discharged trapped charges in the photoreceptor. Toner is then cleaned off the photoreceptor. This leaves the photoreceptor electrically and mechanically reconditioned and ready for its next printing cycle. | 02-21-2013 |
20130101313 | IMAGE FORMING APPARATUS - An image forming apparatus includes a photosensitive body carrying an electrostatic latent image on a surface thereof, a charge device charging the surface of the photosensitive body, an exposure device forming the electrostatic latent image on the photosensitive body, a development device developing the electrostatic latent image so that a developer image is formed, and a transfer device transferring the developer image on a print medium. Wherein, a positive charge dark decay rate of the photosensitive body is greater than a negative charge dark decay rate when a dark decay rate is expressed by | 04-25-2013 |
20130136499 | IMAGE FORMING APPARATUS - The neutralization units | 05-30-2013 |
20130149006 | IMAGE FORMING APPARATUS - Disclosed is an image forming apparatus, including: a main body; an image carrying body disposed in the main body, a transfer unit and an electrical charge removal unit. The image forming apparatus forms a visible image on the image carrying body by carrying out charging, exposing and developing processes. The transfer unit transfers the visible image from the image carrying body to a printing medium. The electrical charge removal unit is configured to remove the residual electrical charge from the printing medium, and is movable, in cooperation with at least one replaceable component part of the transfer unit, between an operable position at which the electrical charge removal unit is capable of removing the electrical charge from the printing medium and a non-interfering position at which the electrical charge removal unit does not interfere with the movement of the at least one replaceable component part of the transfer unit being received into or being removed from the main body for replacement. | 06-13-2013 |
20130156465 | NEUTRALIZATION DEVICE AND IMAGE FORMING APPARATUS - The light emitting portions | 06-20-2013 |
20130195507 | TANDEM IMAGE FORMING APPARATUS HAVING NEUTRALIZATION DEVICE PERFORMING PRE-TRANSFER NEUTRALIZATION AND POST-TRANSFER NEUTRALIZATION - An image forming apparatus has an intermediate transfer belt and a plurality of image forming units located along the intermediate transfer belt. Each image forming unit has a photosensitive drum, a charger that charges the photosensitive drum, a developing device that forms a toner image by attaching toner to an electrostatic latent image formed by exposure after charging, a transfer device that transfers the toner image formed on the photosensitive drum to the intermediate transfer belt, a cleaning device that removes toner remaining on the photosensitive drum, and a neutralization device that neutralizes the photosensitive drum using neutralization light. The neutralization device of at least one of the image forming units irradiates the photosensitive drum with neutralization light, irradiates the intermediate transfer belt with neutralization light, and irradiates the photosensitive drum of the adjacent image forming unit with reflected light of neutralization light from the intermediate transfer belt. | 08-01-2013 |
20130315626 | STATIC ELIMINATING DEVICE AND IMAGE FORMING APPARATUS - A static eliminating device includes: a housing; a substrate mounted to the housing; a light-emitting part mounted on a mounting surface of the substrate; a partition member connected to the housing to cover the substrate and the light-emitting part and face a portion of the housing to which the substrate and the light-emitting part are mounted so that an opening facing the surface of the image carrier is formed in a light-emitting region across which light is delivered from the light-emitting part to the surface of the image carrier; and a restricting protrusion abutting at a distal end thereof against the partition member to support the partition member and restricting the position of the partition member to ensure the formation of the opening. A distal side portion of the restricting protrusion located within the light-emitting region has a tapered shape narrowing with approach toward the partition member. | 11-28-2013 |
20150023696 | IMAGE FORMING APPARATUS AND LIGHT CONCENTRATING DEVICE - An image forming apparatus includes an image carrier, a development device, a transferring device, a static eliminating device, a cleaning device, a light concentrating member and a separating claw. On the image carrier, an electrostatic latent image is formed. The development device develops and visualizes the electrostatic latent image by a toner. The transferring device transfers the toner on the image carrier to a recording sheet. The static eliminating device irradiates the image carrier with a light to eliminate a remained static charge. The cleaning device removes the toner remained on the image carrier. The light concentrating member is arranged between the static eliminating device and image carrier to concentrate the light emitted from the static eliminating device and to irradiate the image carrier with the concentrated light. The separating claw is supported by the light concentrating member to separate the recording sheet from the image carrier. | 01-22-2015 |
20150030351 | STATIC ELIMINATING DEVICE AND IMAGE FORMING APPARATUS - A static eliminating device includes a light emitting part and an optical path providing part. The light emitting part emits a static eliminating light to a surface of an image carrier. The optical path providing part includes a reflecting face reflecting the static eliminating light and a radiation end from which the static eliminating light is radiated to the surface of the image carrier. The reflecting face is a matted face. | 01-29-2015 |
20150030352 | IMAGE FORMING APPARATUS, SUPPORTING MEMBER AND CLEANING DEVICE - An image forming apparatus includes an image carrier, a development device, a transferring device, a static eliminating device, a cleaning device, a separating claw and a static elimination assisting device. On the image carrier, an electrostatic latent image is formed. The development device develops the electrostatic latent image by a toner. The transferring device transfers the toner on the image carrier to a recording sheet. The static eliminating device irradiates the image carrier with a light to eliminate a remained static charge. The cleaning device removes the toner remained on the image carrier. The separating claw is arranged between the static eliminating device and image carrier to separate the recording sheet from the image carrier. The static elimination assisting device radiates a light to a light obstruction area where is not irradiated with the light emitted from the static eliminating device on the image carrier due to the separating claw. | 01-29-2015 |
20150132025 | IMAGE FORMING APPARATUS, LIGHT GUIDE MEMBER, AND ELECTRICITY REMOVING DEVICE - An image forming apparatus includes a light source, a cleaning portion, and a light guide member. The light source irradiates an image carrying member with light to remove electricity from a surface of the image carrying member after formation of an electrostatic latent image thereon. The cleaning portion cleans the surface of the image carrying member. The light guide member is disposed on an upstream side of the cleaning portion in a rotation direction of the image carrying member, forms a light guide path for guiding the light irradiated from the light source to the image carrying member, and includes at least one reflection surface, wherein an area of the reflection surface on the image carrying member side is lower in reflection ratio than an area of the reflection surface on the light source side. | 05-14-2015 |
20150309450 | IMAGE FORMING APPARATUS - An image forming apparatus includes image forming units, static eliminating sections, a mode switching section, and an exposure switching section. The static eliminating sections outputs first and second light. The mode switching section switches a state a between a first mode in which all of the image forming units are operated and a second mode in which only a first image forming unit is operated. In a second image forming unit located upstream next to the first image forming unit, the exposure switching section causes the image bearing member of the second image forming unit not to be irradiated with the first light and causes the image bearing member of the first image forming unit to be irradiated with the second light in the second mode. | 10-29-2015 |
20160026109 | APPARATUS AND METHOD OF FORMING IMAGE - An image forming apparatus includes a first electric charging unit having an electric discharge wire to uniformly electrify a surface of the electrostatic latent image bearer, a second electric charging unit having a second electric discharge wire to execute a pre-electric charge removal electric charging process by electrifying the surface of the electrostatic latent image bearer subsequent to a transfer process to transfer a toner image, and a first electric charge removing device to diselectrify the surface of the electrostatic latent image bearer by irradiating it with electric charge removing light subsequent to the pre-electric charge removal electric charging process. The first electric charge removing device is disposed within an electric discharge region of the second electric discharge wire on a downstream side of an extreme upstream edge of the electric discharge region of the second electric discharge wire in a rotational direction of the electrostatic latent image bearer. | 01-28-2016 |
20160033922 | IMAGE FORMING APPARATUS - An image forming apparatus includes: an image bearer on which a latent image is formed and developed into a toner image; a transfer member that is arranged so as to come in contact with or face the image bearer to form a transfer position; a cleaning unit that removes and collects untransferred toner; a guide member that guides conveyance of the recording medium; a neutralizing light source that irradiates a position downstream of the transfer position and upstream of the cleaning unit in a running direction of the image bearer with neutralizing light which is incident on and reflected by the recording medium sent out from the transfer position and/or the guide member; and a shielding member that blocks light such that the image bearer is not irradiated directly with a part or whole of neutralizing light emitted from the neutralizing light source. | 02-04-2016 |
20160062261 | IMAGE FORMING APPARATUS - An image forming apparatus includes a plurality of image forming units that charge a surface of a photoconductor to form an image, a static eliminator that outputs static elimination light to eliminate a charge remaining on the photoconductor after image formation by the image forming unit, and a controller that controls the image forming unit and the static eliminator. The static eliminator includes a light source that emits the static elimination light, a light guide unit that guides the static elimination light from the light source to the photoconductors, and outputs the guided static elimination light to surface of the photoconductors, and a light shield unit provided inside the light guide unit, or between the light guide unit and the photoconductors in an optical path between the light source and the surface of each of the photoconductors, and configured to transmit or block the static elimination light. | 03-03-2016 |
20160062277 | IMAGE FORMING APPARATUS - An image forming apparatus being capable of commonalizing a control signal for lighting of static eliminators, and controlling the static eliminators with a single port of CPU. The image forming apparatus includes a main body control part controlling image formation; a nip separation mechanism separating an intermediate transfer belt from color photosensitive drums; a separation control part driving nip separation mechanism on a separation control signal inputted from main body control part; a monochrome static eliminator comprised of a monochrome light guide body and a monochrome light source irradiating light on its end face; color static eliminators comprised of color light guide bodies and color light sources irradiating light on their end faces; and an irradiation location shifting mechanism shifting irradiation location of light emitted from color light source from end face of color light guide body when intermediate transfer belt is separated from color photosensitive drums. | 03-03-2016 |
20160070227 | PROCESS CARTRIDGE - A process cartridge includes a photosensitive drum; a light guide member; a shutter portion movable between a closed position where the shutter portion covers the surface of the drum and an open position where the surface of the drum is exposed; and a connecting portion, provided at each of end portions of the shutter portion with respect to an axial direction of the drum, for connecting the shutter portion so as to be movable relative to a main body portion of the process cartridge. The light guide member includes an incident portion, at one end portion thereof with respect to the axial direction of the drum, for irradiating the surface of the drum with light incident on the incident portion. The incident portion is positioned outside the connecting portion with respect to the axial direction of said photosensitive drum. | 03-10-2016 |
20160147168 | PHOTOCONDUCTIVE LAYER REFRESH - In one implementation, an image forming apparatus may include a photoconductive unit and a refresh unit. The photoconductive unit may include a photoconductive layer. The photoconductive layer may have a first polarity during a print routine. The refresh unit may apply a voltage to the photoconductive layer to electrically bias the photoconductive layer to have a second polarity during a refresh routine. | 05-26-2016 |
20160147169 | IMAGE FORMING APPARATUS AND LIGHT GUIDE MEMBER - A light guide member has a transmitting/reflecting portion transmitting and reflecting light that is emitted from a light source, to enter one end of the light guide member in a longitudinal direction, and be guided to the other end of the light guide member so that the light is applied to: a position between the developing roller and the transfer roller on the image carrier on a downstream side in the traveling direction of the transfer target member; and a position between the transfer roller and the cleaning portion on the image carrier on an upstream side in the traveling direction of the transfer target member. Furthermore, the light guide member has a convex portion having an arc-shaped cross section and being formed outward at a position opposing the transmitting/reflecting portion in a part of a predetermined specific region at one end or both ends in the longitudinal direction. | 05-26-2016 |
20160161879 | IMAGE FORMING APPARATUS - In the case where development is performed by a two-component developing method, a previous charge removal light-emitting portion applies charge removal light to a first charge removal target region of an effective outer circumferential surface of a photosensitive member on which effective outer circumferential surface an electrostatic latent image can be formed. The first charge removal target region includes a part of a magnetic brush contact region of the effective outer circumferential surface and a region of the effective outer circumferential surface between the magnetic brush contact region and a transfer position of a toner image. | 06-09-2016 |
20160179027 | ELECTRIC CHARGING-DISELECTRIFYING DEVICE, PROCESS CARTRIDGE WITH ELECTRIC CHARGING-DISELECTRIFYING DEVICE, AND IMAGE FORMING APPARATUS WITH PROCESS CARTRIDGE | 06-23-2016 |
399129000 | Of residual toner | 8 |
20100008699 | Image Forming Apparatus and Image Forming Method - An image forming apparatus includes: an image carrier; an exposure device; a developing device that develops the latent image on the image carrier by using a toner charged to a predetermined polarity and having an external additive; a transfer device that transfers a toner image developed on the image carrier to a transfer medium; a first charging member that charges the external additive and the transfer residual toner remaining on the image carrier and the image carrier after transfer to the same polarity as a polarity of the toner; a cleaning member that electrostatically attracts the external additive and the transfer residual toner charged by the first charging member; and a second charging member that charges the image carrier to an electric potential smaller in absolute value than an electric potential of the image carrier generated after the image carrier passes the cleaning member. | 01-14-2010 |
20110116834 | IMAGE FORMING APPARATUS - An image forming apparatus includes a photosensitive member; a charging device for electrically charging the photosensitive member; an exposure device for exposing to light the photosensitive member charged by the charging device to form an electrostatic image on the photosensitive member; a developing device for developing the electrostatic image on the photosensitive member with toner to form a toner image; a transfer portion for transferring the toner image from the photosensitive member onto an image receiving member; a toner charging portion, disposed upstream of the charging device and downstream of the transfer portion with respect to a rotational direction of the photosensitive member, for electrically charging the toner remaining on the photosensitive member without being transferred onto the image receiving member; and control portion for controlling the charging device and the exposure device so that a stripe-shaped electrostatic image is repeatedly formed in substantially parallel to a longitudinal direction of the photosensitive member and discharges the toner, deposited on the toner charging portion, to the photosensitive member. | 05-19-2011 |
20120257910 | IMAGE-FORMING APPARATUS - An image-forming apparatus for forming an image on a recording medium includes an image carrier for carrying a toner image corresponding to an image to be formed on the recording medium, a cleaning device including a cleaning member for cleaning the image carrier by removing residual toner remaining on an image-carrying face, and a bias-applying unit for applying a first bias for removing residual toner charged to a first polarity by electrostatic force from the image carrier such that the cleaning member captures residual toner, and expelling the residual toner charged to a second polarity, which is an opposite polarity to the first polarity, by electrostatic force from the cleaning member toward the image carrier, between the image carrier and the cleaning member. | 10-11-2012 |
20130114974 | IMAGE FORMING APPARATUS - An image forming apparatus | 05-09-2013 |
20130223880 | OUTPUT OF A CORONA CHARGER - A system for charging an insulating object on a static dissipative surface with a constant current includes a corona electrode in close proximity to the insulating surface; a shell electrode in close proximity to the corona electrode; a high voltage power supply connected to the corona electrode; wherein the potential of the shell electrode is raised to at least one tenth the magnitude of the potential of the corona electrode; sensing a first current from the high voltage power supply to the corona electrode; sensing a second current from the shell electrode to ground; and adjusting a voltage on the high voltage power supply to maintain a constant difference between the first current and the second current. | 08-29-2013 |
20130223881 | OUTPUT OF A CORONA CHARGER - A system for charging an insulating object on a static dissipative surface with a constant current includes a corona electrode in close proximity to the insulating surface; a shell electrode in close proximity to the corona electrode; a high voltage power supply connected to the corona electrode; wherein the potential of the shell electrode is raised to at least one tenth the magnitude of the potential of the corona electrode; sensing a first current from the high voltage power supply to the corona electrode; sensing a second current from the shell electrode to ground; and adjusting a voltage on the high voltage power supply to maintain a constant difference between the first current and the second current. | 08-29-2013 |
20130223882 | OUTPUT OF A CORONA CHARGER - A method for charging a static dissipative object on an insulating surface with a constant current includes placing a corona electrode in close proximity to the static dissipative object; placing a shell electrode in close proximity to the corona electrode; connecting a high voltage power supply to the corona electrode; raising the potential of the shell electrode to at least one tenth the magnitude of the potential of the corona electrode; sensing a first current from the high voltage power supply to the corona electrode; sensing a second current from the shell electrode to ground; and adjusting a voltage on the high voltage power supply to maintain a constant difference between the first current and the second current. | 08-29-2013 |
20130223883 | OUTPUT OF A CORONA CHARGER - A method for charging an insulating object on a static dissipative surface with a constant current includes placing a corona electrode in close proximity to the insulating object; placing a shell electrode in close proximity to the corona electrode; connecting a high voltage power supply to the corona electrode; placing a counter electrode on a side of the static dissipative surface opposite the corona electrode; maintaining the counter electrode at a constant potential; raising the potential of the shell electrode to at least one tenth the magnitude of the potential of the corona electrode; sensing a first current from the high voltage power supply to the corona electrode; sensing a second current from the shell electrode to ground; and adjusting a voltage on the high voltage power supply to maintain a constant difference between the first current and the second current. | 08-29-2013 |