| Entries |
| Document | Title | Date |
|---|
| 20080199228 | COLOR IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE ATTACHED THERETO - In a color image forming apparatus comprising a plurality of developing devices each provided with a developing roller structured with a developing sleeve and a fixed magnetic pole member, an agitating member, a recovering and feeding member, a regulating member and a developing device casing member, at least one of the plurality of developing devices has a different developer storing capacity and a different outer diameter of the recovering and feeding member for the other developing devices and has the same angle allocation values among the plurality of fixed magnetic poles in the fixed magnetic pole member. | 08-21-2008 |
| 20080240793 | IMAGE FORMING APPARATUS - An image forming apparatus having an image carrier for forming an electrostatic latent image and a developing unit for developing the electrostatic latent image with a two-component developing agent, the developing unit includes: a developing agent carrier for developing the electrostatic latent image to form a visible image, having inside thereof a development main magnetic pole for forming a bristle of a magnetic brush; and a plurality of magnetic poles for conveying the developing agent, wherein the developing unit performs a counter type contact developing method, and wherein, the development area is formed so that, a contact width of the bristle of the magnetic brush is 70% or less with respect to a development width, and a center position of the contact width is positioned on an upstream side with respect to a center position of the development width in a rotation direction of said image carrier. | 10-02-2008 |
| 20080279596 | LOW GRAININESS PRINTING AND MICR PRINTING WITH SCMB AND EA-SCMB SYSTEMS - A specific magnet roll design for high speed semi-conductive magnetic brush (SCMB) development systems for magnetic image character recognition (MICR) printing is provided. The resulting magnetic field distributions include a more uniform radial field and enhance solid area development and halftone graininess without or substantially without bead carryout issues. In addition, this enhancement of solid area development enables magnetic toner in these hill speed SCMB systems that normally would not provide sufficient development latitude for MICR. | 11-13-2008 |
| 20090047045 | IMAGE FORMING APPARATUS - An image forming apparatus capable of collecting residual toner from the donor roller by means of a plurality of magnetic rollers and consequently, reducing the occurrences of possible ghost phenomenon caused by the toner residue. The image forming apparatus includes an image receiving member having an electrostatic latent image formed on a surface thereof, a donor roller to receive a toner and form a layer of toner on an outer circumferential surface thereof, the donor roller being arranged to oppose the image receiving member so as to develop with toner the electrostatic latent image of the image receiving member, and a plurality of magnetic rollers each to support magnetic brushes of carrier. | 02-19-2009 |
| 20090136267 | MAGNETIC SCAVENGER FOR AN ELECTROSTATOGRAPHIC PRINTER - An apparatus and method for managing magnetic carrier in an electrostatographic printer including an apparatus for directing magnetic carrier from the photoconductor, back toward the feed apparatus wherein the apparatus includes a magnetic carrier scavenger such that there is more magnetic carrier volume in the direction of the feed apparatus as well as a well to collect any magnetic carrier that does not move toward the feed apparatus. | 05-28-2009 |
| 20090162108 | IMAGE FORMING APPARATUS - A developing unit includes a developing hopper for storing a dual-component developer. In the developing hopper, an opening portion is formed at the position opposing the outer peripheral surface of a photoreceptor drum. A developing roller for supplying the developer to the photoreceptor drum to develop an electrostatic latent image is provided inside the developing hopper. The developing roller has a multi-pole magnetic member having a multiple magnetic poles and a non-magnetic sleeve. The multi-pole magnetic member has a multiple number of magnetic poles radially arranged apart from each other. The photoreceptor drum incorporates an opposing magnetic pole formed of a bar magnet having a rectangular section, disposed at a position opposing the magnetic pole across a photosensitive layer. The opposing magnetic pole has a polarity dissimilar to that of the main magnetic pole. | 06-25-2009 |
| 20090185835 | IMAGE FORMING APPARATUS - An image forming apparatus is disclosed. The image forming apparatus includes a photosensitive body, a magnetic roller disposed at a predetermined distance from the photosensitive body, and a donor roller disposed between the photosensitive body and the magnetic roller. The donor roller has a diameter larger than the closest distance between the photosensitive body and the magnetic roller. The image forming apparatus includes gap rings and pressing device to maintain desired gaps between the magnetic roller and the donor roller and between the donor roller and the photosensitive body. | 07-23-2009 |
| 20090232563 | MAGNETIC ROLLER, DEVELOPER CARRIER, DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A magnetic roller includes a cylindrical magnetic field generation part ( | 09-17-2009 |
| 20090238610 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A first carrying member supplies a developer to a developer carrier at the position of a developer attracting magnetic pole H | 09-24-2009 |
| 20090285607 | DEVELOPING APPARATUS - A developing apparatus including a first development sleeve carrying a developer toward a first development area, a second development sleeve carrying the developer from the first sleeve toward a second development area, a first magnet roller disposed in the first sleeve and having a first magnetic pole, a second magnet roller disposed in the second sleeve and having a second magnetic pole, a first magnet member disposed in the vicinity of an axial end of the first sleeve without facing the first magnetic pole, and a second magnet member disposed in the vicinity of an axial end of the second sleeve without facing the second magnetic pole. A surface facing the second sleeve in an end area downstream of the second magnet member in a rotating direction of the second developer carrying member is identical in polarity with the second magnetic pole. | 11-19-2009 |
| 20090290912 | DEVELOPER APPARATUS AND IMAGE FORMING APPARATUS COMPRISING THE SAME - A developer includes a developer carrying body that carries a two-component developer having a magnetic toner and a carrier. A toner carrying body opposes the developer carrying body and receives toner from the developer carrying body. An image carrying body develops an electrostatic latent image by toner carried on the toner carrying body. A first magnetic member is inside the developer carrying body and opposes a surface of the toner carrying body. A second magnetic member is inside the toner carrying body and opposes the surface of the developer carrying body. The second magnetic member is magnetized to an opposite polarity to the first magnetic member and generates a magnetic force at least on the surface of the toner carrying body in a range of 25 mT to 40 mT in a direction perpendicular to the surface of the toner carrying body. | 11-26-2009 |
| 20100247162 | DEVELOPER STATION FOR AN ELECTROGRAPHIC PRINTER HAVING REDUCED DEVELOPER AGITATION - A developer station and method for an eletrographic printer is provided that reduces developer agitation. The developer station includes a sump of magnetic developer, and a magnetic brush roller mounted above said sump and having a rotatable magnetic core surrounded by a substantially cylindrical toning shell rotatably mounted with respect to the core. The toning shell defines a nip at its closest point to the photoconductor element. A tangent line tangent to the cylindrical toning shell at the nip is oriented substantially vertically, and the magnetic developer is applied to the toning shell at an angular distance of no more than about 120° from said nip. The toning shell may be eccentrically mounted with respect to the magnetic core and is substantially closest to the rotatable magnetic core within about +30° and −30° from said nip. Such a configuration advantageously reduces the residence time of the developer on the toning shell. | 09-30-2010 |
| 20100247163 | DEVELOPER STATION AND METHOD FOR AN ELECTROGRAPHIC PRINTER WITH MAGNETICALLY ENABLED DEVELOPER REMOVAL - A developer station for an electrographic printer is provided that reduces developer agitation. The developer station includes a sump of magnetic developer, and a magnetic brush roller mounted above said sump and having a rotatable magnetic core surrounded by a substantially cylindrical toning shell rotatably mounted with respect to the core. The toning shell defines a nip at its closest point to the photoconductor element. A toning shell and magnetic core radius along with the eccentric offset of the toning shell from the rotating magnetic core are used in combination with the magnetic properties of the rotating magnetic core to determine the radius of the toning shell and magnetic core to improve the skiving and removal of developer from the toning shell after the developer has passed through the nip with the photoconductor element. | 09-30-2010 |
| 20110026976 | ELECTROGRAPHIC IMAGE DEVELOPING APPARATUS AND PROCESS - A method for forming an electrographic image includes providing an imaging member having an electrostatic image and a toning shell adjacent to the imaging member to take into account the slippage as a result of toner particles that are approximately spherical. | 02-03-2011 |
| 20110044728 | METHOD AND SYSTEM TO REDUCE HIGH-FREQUENCY BANDING FOR ELECTROPHOTOGRAPHIC DEVELOPMENT STATIONS - A method for reducing high-frequency banding in an electrophotographic development station having a rotating shell and a photoconductor is disclosed. A rotating speed of the rotating shell is adjusted relative to a photoconductor such that a banding reduction ratio is not a ratio of differing low whole numbers. Another method for reducing high-frequency banding in an electrophotographic development station having a rotating shell and a rotating magnetic core is also disclosed. A rotating speed of the rotating shell is adjusted relative to a rotating speed of the rotating magnetic core such that from the point of view of a spot on a dielectric support member (DSM) in a nip region of the DSM, a similar point on the rotating shell is substantially in alignment with the DSM spot in the nip region when a pole flip occurs. | 02-24-2011 |
| 20110044729 | HIGH-FREQUENCY BANDING REDUCTION FOR ELECTROPHOTOGRAPHIC PRINTER - A method for reducing high-frequency banding in an electrophotographic development station having a rotating shell and a rotating magnetic core is disclosed. A rotating angular velocity of the rotating shell is adjusted relative to a angular velocity of a photoconductor such that a ratio of these angular velocities is not a ratio of whole numbers. | 02-24-2011 |
| 20110170914 | MAGNETIC ARRANGEMENT IN A DEVELOPMENT ROLLER OF AN ELECTROSTATOGRAPHIC PRINTER - An apparatus and method for arranging the spacing of magnets in an electrostatogaphic printer to eliminate steaks due to the magnetic carrier that does not move uniformly across the photoconductor surface. | 07-14-2011 |
| 20120070197 | IMAGE FORMING APPARATUS - The image forming apparatus is an image forming apparatus including an image bearing member, a developing device, a transfer device, and a cleaning device. The developing device includes a toner bearing member having a surface subjected to alumite treatment. Toner that is used in the image forming apparatus is magnetic mono-component developer including magnetic toner particles containing at least binder resin and iron-containing magnetic powder, and an external additive to be externally added to the magnetic toner particles. The external additive is formed from inorganic fine particles which have been subjected to surface treatment with a tin-containing compound and an antimony-containing compound. In the image forming apparatus, the ratio of antimony to iron of the toner that has been removed by the cleaning device is double or more the ratio of antimony to iron of the toner before being conveyed by the toner bearing member. | 03-22-2012 |
| 20120093543 | ELECTROSTATIC LATENT IMAGE DEVELOPER, METHOD FOR FORMING IMAGE, AND IMAGE FORMING APPARATUS - An electrostatic latent image developer contains a toner having a volume-average particle diameter of about 2.0 μm to about 6.5 μm, and a carrier whose average magnetization per carrier particle at an applied magnetic field of 1 kilooersted is about 3.0×10 | 04-19-2012 |
| 20120195646 | SUPPLYING ELECTROPHOTOGRAPHIC TONING MEMBER USING RIBBON BLENDER - A toning apparatus for an electrophotographic marking engine using multi-component developer includes a magnet for producing a magnetic field through the surface of a toning member, so that the carrier particles in the developer in a receiving zone are attracted to the toning member. A rotatable ribbon blender includes an axle, a first inner ribbon and a first outer ribbon having opposite handednesses of twist and arranged to rotate with the axle, and a paddle connected to the first outer ribbon. The ribbon blender is disposed at least partially in the developer in the sump, so that when the ribbon blender rotates, the paddle transports developer from the sump to the receiving zone. No feed roller or supply roller is required; the ribbon blender mixes and transports developer. | 08-02-2012 |
| 20120230737 | DEVELOPING DEVICE, VISIBLE IMAGE FORMING DEVICE, AND IMAGE FORMING APPARATUS - A developing device includes a developer container; a developer holding body including a magnet member and a substantially cylindrical member; a transport member including a rotating shaft and a substantially spiral transport blade; a layer-thickness regulating member; and an interrupting member that is arranged between the developer holding body and the transport member, that intersects with a first virtual plane passing through a facing position between the regulating member and the developer holding body and being adjacent to a rotation locus of a radial-direction outer edge of the transport blade at a position at which a speed in a circumferential direction of the transport blade has a speed component toward the regulating member, and a second virtual plane passing through rotation centers of the developer holding body and transport member, and that interrupts movement of the developer pushed and moving in the radial direction of the transport blade. | 09-13-2012 |
| 20130034372 | METHOD AND SYSTEM TO REDUCE HIGH-FREQUENCY BANDING FOR ELECTROPHOTOGRAPHIC DEVELOPMENT STATIONS - A method for reducing high-frequency banding in an electrophotographic development station having a rotating shell and a photoconductor is disclosed. A rotating speed of the rotating shell is adjusted, relative to a rotating speed of the rotating magnetic core such that from the point of view of a spot on a dielectric support member (DSM) in a nip region of the DSM, a similar point on the rotating shell is substantially in alignment with the DSM spot in the nip region when a pole flip occurs. | 02-07-2013 |
| 20130071145 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH SAME - A developing device includes a case for housing a developer, a magnetic roller, an agitating member, a layer thickness restricting member and a plurality of projection members. The magnetic roller is arranged in the case, includes a rotary shaft and magnetically carries the developer on a circumferential surface. The agitating member is arranged to face the magnetic roller in the case, includes a shaft center and a screw forming portion arranged around the shaft center. The layer thickness restricting member restricts the layer thickness of the developer to a predetermined thickness. The plurality of projection members are arranged along a rotation axis direction of the magnetic roller to face the circumferential surface of the magnetic roller at a side upstream of the layer thickness restricting member in a rotating direction of the magnetic roller and comes into contact with the developer carried on the magnetic roller. | 03-21-2013 |
| 20130183067 | DEVICE, SYSTEM AND METHOD FOR PRODUCING A MAGNETICALLY INDUCED VISUAL EFFECT - The invention relates to a device, system and method for producing magnetically induced visual effects in coatings, particularly security or decorative features, containing orientable magnetic particles. The device comprises a printing unit, an orientation means, a substrate-guiding system and a photocuring unit. The printing unit is arranged to print with the coating composition an image on a first side of a substrate. The orientation means comprises a magnetic field generating element for orienting the magnetic particles in the coating composition of the printed image. The substrate-guiding system is arranged to bring and hold the substrate in contact with the orientation means. The photocuring unit irradiates the image printed on the substrate to at least partially cure the coating composition of the image while the substrate is still in contact with the orientation means. The photocuring unit is configured such that its emission of thermal radiation energy is such limited as to not heat the orientation means to an average temperature T | 07-18-2013 |
| 20140072349 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device, including: a developer bearing member, which is disposed opposite to an electrostatic latent image bearing member and which bears thereon a developer for developing an electrostatic latent image formed on the electrostatic latent image bearing member and conveys the developer to a developing region, wherein the developer includes a toner and a carrier, the toner containing: a toner base containing a binder resin and a colorant; and an external additive, wherein the external additive contains coalescent particles each made up of a plurality of coalescing primary particles, and wherein a work function Wc of the carrier and a work function Ws of the developer bearing member satisfy a relationship of the following formula (1): | 03-13-2014 |
| 20140086641 | TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A two-component developer includes toner and a magnetic carrier. The two-component developer is used in a developing device including a circular cylindrical developer transporting member that is disposed so as to be separated by 125 μm to 250 μm from a latent image carrier that rotates. The two-component developer is used so as to satisfy a condition in which a width of a region where a magnetic brush contacts a surface of the latent image carrier is in a range of from 1.0 mm to 2.25 mm, and a condition in which a developer density of the region where the magnetic brush contacts the surface of the latent image carrier is in a range of from 0.75×10 | 03-27-2014 |
| 20140193179 | IMAGE FORMING APPARATUS HAVING REDUCED MANUFACTURING COSTS, AND IMAGE FORMING UNIT AND DEVELOPING UNIT INCLUDED THEREIN - An image forming apparatus supplies toner to an electrostatic latent image on a circumferential surface of a photosensitive rotating member to develop the electrostatic latent image, and includes: a photosensitive unit including the photosensitive rotating member and a pair of support frames rotatably supporting the photosensitive rotating member at axial ends thereof; a developing unit including a developing sleeve that is longer in a rotational axis direction thereof than an element tube of the photosensitive rotating member in a rotational axis direction thereof, and a pair of bearings provided outward from axial ends of the element tube and rotatably holding the developing sleeve at axial ends thereof; and a forcing member relatively forcing the developing unit toward the photosensitive unit to bring the bearings into abutment with the respective support frames, such that a gap between the developing sleeve and the photosensitive rotating member is maintained at a predetermined value. | 07-10-2014 |
| 20140334851 | DEVELOPING APPARATUS AND IMAGE FORMING APPARATUS - In accordance with one embodiment, a developing apparatus comprises a developing roller configured to hold developing agent and face to an image carrier; a housing configured to store the developing agent and support the developing roller; and a first gap adjusting section configured inside the housing at the downstream side of an opening end part of the housing in a rotation direction of the developing roller, and configured to protrude from an inner wall of the housing at the side parts in an axis direction of the developing roller. | 11-13-2014 |
| 20140356030 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE INCORPORATING SAME - A developing device includes a developer bearer, a magnetic field generator provided inside the developer bearer, a casing including an opening to partly expose a surface of the developer bearer, and a lateral end cover to cover an axial end portion of the exposed surface of the developer bearer. The lateral end cover includes a wide portion extending more to an axial inner side of the developer bearer than a downstream portion of the lateral end cover positioned downstream from the wide portion in a direction of rotation of the developer bearer. A downstream end of the wide portion is downstream from an upstream end of the development range in the direction of rotation of the developer bearer. | 12-04-2014 |
| 20140369720 | DEVELOPING APPARATUS, PROCESS CARTRIDGE, AND INTERVAL GUARANTEE MEMBER - A developing apparatus used in an image forming apparatus including a developer bearing member configured to develop a latent image formed on an image bearing member and rotate together with the image bearing member so that opposed surfaces thereof rotate in the same direction, an interval guarantee member configured to maintain a distance between the developer bearing member and the image bearing member by coming into abutment with the developer bearing member and the image bearing member, and a biasing member configured to bias the interval guarantee member toward the upstream side in the direction of rotation of the developer bearing member by applying an elastic force generated by elastic deformation on the interval guarantee member. | 12-18-2014 |
| 20150139699 | DEVELOPING APPARATUS - A developing apparatus includes a developer carrying member; and a magnetic member provided inside the carrying member and having magnetic poles arranged circumferentially, wherein on a center axis of the carrying member outside an end of the magnetic member, there is a region in which a magnetic flux density of a first magnetic polarity converges toward zero; and wherein a ratio of a volume, per unit length, of a portion of the magnetic member which has a surface magnetic pole of a second magnetic polarity which is different from the first magnetic polarity in a longitudinal end portion to that in a longitudinally central portion is smaller than a ratio of a volume of a portion of the magnetic member which has a surface magnetic pole of the first magnetic polarity in a longitudinal end portion to that in a longitudinally central portion. | 05-21-2015 |
