Abstract: In an image forming apparatus, in a case where a power of the apparatus is turned from OFF to ON, a rotation drive unit rotationally drives each of a developing roller, a first conductive roller, and a second conductive roller in a state where a liquid developer supplied to a developer container by a supply device has reached a supply position, and a bias application unit applies a bias to each of the developing roller, the first conductive roller, and the second conductive roller after the developing roller rotates at least once, in the state where the liquid developer supplied to the developer container by the supply device has reached the supply position.

Abstract: In some examples, a print material particles dispenser, including: a print material area with an output area that includes an output channel that is positioned away from a central axis of the print material area, and a structure adapted to decrease a volume of the print material area to output print material particles through the output channel of the print material area.

Abstract: A liquid developer set of the present invention includes a first liquid developer including an insulating liquid and first toner particles and a second liquid developer including an insulating liquid and second toner particles, the first toner particles include carbon black and a first resin, the second toner particles include a coloring agent other than carbon black and a second resin, without including carbon black, the first resin and the second resin each include a hydrocarbon long chain which is a hydrocarbon group having a carbon number of 8 to 30, and a mass ratio of the hydrocarbon long chain to the first toner particles is higher than a mass ratio of the hydrocarbon long chain to the second toner particles.

Abstract: In accordance with one embodiment, an image forming apparatus forms a metallic toner image with the toner having metallic color tone. The plurality of developing sections includes either or both of a developing section for forming a black toner image with the black toner and a developing section for forming a white toner image with the white toner. The plurality of developing sections is provided with one or more than two developing sections for forming a metallic toner image with the toner having metallic color tone.

Abstract: An image forming device includes: a charging unit configured to apply charging bias voltage to a charging member and charge a surface of an image carrying body; an exposure unit configured to expose the surface of the image carrying body, and form an electrostatic latent image; a developing unit configured to apply developing bias voltage to a developer carrying body, and develop the electrostatic latent image; and a control unit configured to control timing to start applying the developing bias voltage relative to timing to start applying the charging bias voltage, wherein the control unit performs control such that the larger an absolute value of the charging bias voltage is, the shorter an interval from timing to start applying the charging bias voltage to timing to start applying the developing bias voltage becomes, and such that the smaller the absolute value is, the longer the interval becomes.

Abstract: A printing apparatus comprising a plurality of base color ink containers, each for containing a different base color ink, and a custom color ink container for containing a custom color ink, the printing apparatus being configured to print any of the custom color ink and the different base color inks, from the custom color ink container and the plurality of base color ink containers, respectively, to a print medium. The printing apparatus is configured to mix a custom color ink for the custom color ink container using a combination of any of the base color inks.

Abstract: A liquid developer includes a toner that contains a binder resin and a release agent, and a carrier liquid that has a difference (?SP (tc)) in SP value from the binder resin of from 1.5 to 7.0, wherein the release agent is not eluted in the carrier liquid at a temperature lower than a glass transition temperature of the binder resin.

Abstract: In a method or apparatus to optimize transfer of a developer fluid having toner embedded in a carrier fluid in an electrophoretic printing apparatus, charge images of print images are generated on an intermediate image carrier. The print images are inked into toner images by means of a developer station with the developer fluid. The toner images are transfer printed onto a printing substrate in a transfer printing zone by a transfer unit. The toner embedded in the carrier fluid is thus transported from the developer station to the intermediate image carrier in a first transport path segment and from the transfer unit to the printing substrate in a second transport path segment. A temperature acting on the carrier fluid in the first transport path segment is above a melting point of the carrier fluid, and a temperature acting on the carrier fluid in the second transport path segment is below the melting point of the carrier fluid.

Abstract: A wet-type image forming apparatus includes an image bearing member, a developer bearing member for bearing liquid developer containing toner and carrier liquid on the circumferential surface thereof, a bias applying unit for applying a developing bias to the developer bearing member, a first charging unit for charging the toner in the liquid developer to a first polarity before supplying the liquid developer to the image bearing member, and a second charging unit for reversely charging the toner in residual liquid developer remaining on the circumferential surface of the developer bearing member to a second polarity opposite to the first polarity after the development process. When VD denotes the developing bias and V0 denotes the surface potential of the residual liquid developer when the reverse charging is not performed, a surface potential V of the residual liquid developer after reverse charging satisfies the equation: 0.1?(VD?V)/(V0?VD)?1.0.

Abstract: Liquid electro-photographic (LEP) printers having a coating disposed thereon, LEP printers having a compound such as fluorosurfactant in the resin to make one or more parts of the LEP printer, and the like, are disclosed.

Abstract: An image forming device includes a first development unit configured to form a first image on a recording medium with a first developer, a second development unit configured to form a second image on the recording medium with at least one of a plurality of second developers that are different from the first developer, and a print control unit configured to select the at least one of the plurality of second developers for forming the second image. The second developers are transparent developers, and the second image is a transparent image.

Abstract: A printing machine having a colorant support, a transfer device, a delivery apparatus, and a colorant stripper. The transfer device is arranged to transfer colorant from a reservoir onto the colorant support such that during operation of the printing machine, a colorant is transferred from the transfer device onto the colorant support. The delivery apparatus is arranged to deliver at least part of the colorant from the colorant support onto a printing medium or a transfer means. The colorant support and the colorant stripper are arranged so that during operation of the printing machine, non-consumed colorant is transferred from the colorant support onto the colorant stripper. The invention is also a method for printing using such an apparatus.

Abstract: A method and apparatus for generating documents having stored electrostatic pattern information provides security with respect to the authenticity of documents. A liquid medium including a plurality of electrostatic monopoles is applied to the surface of a document, which embeds a permanent electrostatic pattern in the document. The pattern is then readable by an electrostatic scanner. The monopoles may be associated with differing colors, including black and white, may be transparent or have a neutral color. The patterns may embed data, certificates or shapes. The monopoles may provide a watermark or visible image. The apparatus may be a pen or printer, and may include multiple selectable vessels containing ink and/or electrostatic liquid medium of one or both charge states. Visible features of the document can be compared with the detected pattern, or the pattern may be compared to a database or decrypted with a key.

Abstract: An imaging member for ink-based digital printing having an outermost layer including a structured organic film (SOF) having a plurality of segments and a plurality of linkers arranged as a covalent organic framework, wherein the structured organic film may be multi-segment thick.

Abstract: An imaging member for a xerographic liquid immersion development machine having an outermost layer including a solvent resistant structured organic film (SOF) having a plurality of segments and a plurality of linkers arranged as a covalent organic framework, wherein the structured organic film may be multi-segment thick.

Abstract: A liquid developer collecting system includes a developing roller cleaning unit that collects liquid developer on a developing roller; a developer storage unit that stores the liquid developer collected by the developing roller cleaning unit; and a concentration control unit that stores the liquid developer fed from the developer storage unit and controls the concentration of the liquid developer.

Abstract: A liquid developer collecting system. A collection section collects liquid developer from a photosensitive body. A storage section stores liquid developer collected by the collection section. A first feed unit feeds liquid developer from the storage section to a concentration control unit.

Abstract: A liquid developer collecting system. A developing unit has a developing roller. A developing roller cleaning unit collects liquid developer on the developing roller. A concentration control unit stores liquid developer collected by the developing roller cleaning unit and controls the concentration of the liquid developer. A first feed unit feeds the liquid developer in the concentration control unit to the developing unit. A second feed unit feeds the liquid developer in the concentration control unit. A developer storage unit stores the liquid developer fed by the second feed unit.

Abstract: A liquid developer includes an insulation liquid, toner particles dispersed in the insulation liquid, which at least a part of the surface of each of the toner particles contains a rosin resin and a dispersant improving dispersibility of the toner particles in the insulation liquid, which the dispersant is consisted of a material having a predetermined amine value. The liquid developer described above has superior positive charge property of toner particles and which has superior dispersibility of the toner particles for a long period of time. Further, an image forming apparatus that can suitably use such a liquid developer is also provided.

Abstract: A method comprising generating a clear layer on a first surface using a transparent liquid toner, generating a color layer using a pigmented liquid toner over the clear layer on the first surface, and transferring the clear layer and the color layer from the first surface to a substrate is provided.

Abstract: A liquid developer includes: toner particles containing a rosin resin; an insulating liquid in which the toner particles are dispersed; and a dispersant having plural cyclic structures containing a secondary amine and/or a tertiary amine.

Abstract: A liquid developer includes an insulating liquid and toner particles obtained by surface-modifying toner mother particles made of a material containing a rosin resin with a polyalkyleneimine.

Abstract: A process for producing a liquid developer includes: providing a dispersion liquid containing an aqueous dispersion medium and toner mother particles including a rosin resin; chemically modifying surfaces of the toner mother particles with an amine-based material by mixing the amine-based material with the dispersion liquid to obtain toner particles; and dispersing the toner particles in an insulating liquid.

Abstract: A liquid developer is provided. The liquid developer comprises an insulation liquid, toner particles dispersed in the insulation liquid, a dispersant dissolved in the insulation liquid; and a charge control agent dissolved in the insulation liquid. The charge control agent is represented by the following chemical formula (I): wherein in the chemical formula (I) R1 represents an alkyl group or alkenyl group having a carbon number in the range of 8 to 22, and R2 represents a hydroxyalkyl group. The liquid developer has both superior dispersibility and a charge characteristic of toner particles. Further, an image forming apparatus is also provided.

Abstract: A liquid developer includes an insulation liquid, toner particles dispersed in the insulation liquid, which at least a part of the surface of each of the toner particles contains a rosin resin and a dispersant improving dispersibility of the toner particles in the insulation liquid, which the dispersant is consisted of a material having a predetermined amine value. The liquid developer described above has superior positive charge property of toner particles and which has superior dispersibility of the toner particles for a long period of time. Further, an image forming apparatus that can suitably use such a liquid developer is also provided.

Abstract: A liquid developer includes: an insulating liquid; toner particles constituted by a resin material as a main component; and a dispersing agent expressed by Formula (I): H2N—R—NH—R???(I) (where, R denotes an alkylene group having a carbon number of to 6 and R? denotes an alkyl group having a carbon number of 8 to 24).

Abstract: A method of producing an image on a final image receptor in a single pass electrophotographic system is provided. The method includes the steps of providing at least one toner development unit including a photoreceptive element and charged toner particles, and creating a toned image on the photoreceptive element that is transferred to an intermediate transfer member. The method further includes providing a transfer assist material development unit for applying a transfer assist material to at least a portion of the toned image to form a complete image layer on the intermediate transfer member, wherein the complete image layer is formed in a single pass of the intermediate transfer member. The method also includes contacting the complete image layer with a final image receptor while applying a bias that is sufficiently strong to transfer at least a portion of the complete image layer to the final image receptor.

Abstract: A method of producing an image on a final image receptor from image data in a multiple pass electrophotographic system is provided. The method includes the steps of applying transfer assist material to an intermediate transfer member and providing at least one development unit including a photoreceptive element and charged toner particles. During each complete processing cycle of an intermediate transfer member, a toned image is created and transferred to the intermediate transfer member by application of a bias. In multiple processing cycles of the intermediate transfer member, the transfer assist material and the at least one toned image thereby form a composite image layer on the intermediate transfer member. The method further includes contacting the composite image layer with a final image receptor while applying a bias that is sufficiently strong to transfer at least a portion of the composite image layer to the final image receptor.

Abstract: When superimposing toner images of a plurality of colors on an image supporting member to form a color image, a free phase ion in a precedent image is removed without distorting the toner image precedently formed on the image supporting member, thereby improving reproducibility of image dots of the toner images having second and subsequent colors to obtain a high-definition color image with high contrast.

Abstract: In a device and method for electrographic printing or copying, a latent image carrier is provided having a potential pattern corresponding to an image pattern. An applicator pattern is provided that carries a liquid layer of ink spaced from a surface of the latent image carrier by an air gap. A surface of the applicator element is provided with a structure with which detachment of droplets from the liquid layer is facilitated, the structure having a plurality of first areas having an increased electrical conductivity, a plurality of second areas that differ from a remaining surface based on a portion of surface energy, and a plurality of third areas formed as microscopic elevations. A force field is applied in the air gap to act on the liquid layer. By overcoming the air gap, droplets are transferred from the liquid layer on the surface of the latent image carrier by overcoming the air gap for inking a latent image to create an inked image.

Abstract: A multi-printer system comprising: a plurality of imaging apparatus, each said apparatus comprising at least one liquid-toner reservoir, containing liquid toner; a central source of toner concentrate; a toner concentrate conduit which connects the central source to the individual imaging apparatus; and at least one toner-concentrate pump which pumps the toner concentrate from the central source to the individual imaging apparatus.

Abstract: An image forming system and method of using the system includes a development station for developing an image, a replenishing source that stores toner mixed to a desired color and comprising at least two toner component colors, a conditioning station that conditions the toner before sending the toner to a developing station, and a drawing device that draws a portion of the toner in the conditioning station. The drawing device will remove a portion of at least one component color of the toner until the desired color is suitable for developing. The system and method will help to produce images of a desired color in liquid immersion development of color prints. With the use of the drawing device, consistent colored images can be achieved while reducing waste of toner.

Abstract: A liquid-development full-color electrophotographic apparatus utilizes a development section having a liquid toner as a liquid developer to form a toner image according to an electric field established between the development section and a photosensitive drum. The toner image is transferred from the photosensitive drum onto an intermediate transfer roller according to an electric field established between the intermediate transfer roller and the photosensitive drum, from the intermediate transfer roller to an intermediate transfer belt, and then to a transfer-and-fixation section, which melt-transfers the toner image onto a printing medium. A voltage controlled according to electric characteristics of each color toner is applied to the corresponding photosensitive drums while the roller is grounded. A toner cohesion enhancement unit is provided for enhancing the degree of toner cohesion of a toner image transferred and reverse transfer is suppressed.

Abstract: An operational sequence including a cleaning of a processing device shifting to the standby state in the process of shifting from a printing operation to a standby state of a liquid electro-photographic device of a tandem type is performed well. A processing device has a squeeze roller for performing removal of residual liquid developer from an image formed on a photoconductive belt 2 and for forming an image into a film and is removed in order that the squeeze roller 6 shifts from the state having a clearance from the photoconductive belt 2 to the state being pressed against the photoconductive belt 2 for performing a removal of the liquid developer remaining on the squeeze roller 6 to the photoconductive belt 2 in sequence when the image forming operation is finished after cleaning the liquid developer adhered on the squeeze roller 6, and the removal proceeds sequentially from a processing device on a downstream side of a traveling direction of the photoconductive belt 2.

Abstract: Method of a liquid process type electrophotographic apparatus forming a multicolor visible image on a surface of a photosensitive drum, which prevents the visible image after the second color from being disturbed. After a visible image of the first color has been formed with a development unit on a surface of a photosensitive drum, a part of liquid carrier existing on the surface of the photosensitive drum is removed by using a squeeze roller and an air blower. When an electrostatic latent image is formed with a charger 1 and an exposing unit on the photosensitive drum where the visible image of the first color has been formed, disturbance of the electrostatic latent image caused by a large amount of liquid carrier or lack of liquid carrier can be reduced by reserving a predetermined very small amount of liquid carrier, and disturbance of a visible image of the second color to be developed by a development unit can be reduced.

Abstract: An image forming apparatus includes an image processing circuit for, when a determination circuit for determining an image signal determines that the image signal is an image signal that makes a liquid toner film have a predetermined thickness or less, performing predetermined processing for the image signal, an electrostatic latent image forming section for forming an electrostatic latent image on the image carrier by irradiating the image carrier with a light from exposure means on the basis of the image signal subjected to the predetermined processing, a developing unit for developing the image on the image carrier by using the liquid toner in accordance with the electrostatic latent image, and a transfer section for transferring the image on the image carrier onto the recording medium. With this arrangement, a sharp image can be formed by removing low-density areas produced in liquid toner.

Abstract: This invention is to provide an electrophotographic photosensitive body used in a wet electrophotographic apparatus and including a substrate having a conductive surface, and a photosensitive layer formed on the conductive surface of the substrate and changing in a charged state upon being irradiated with light, the photosensitive layer having, on an exposed surface, C—F bonds and C—H bonds for which the ratio of the number NCF of C—F bonds to the number NCH of C—H bonds satisfies, on the exposed surface of the photosensitive layer, a relationship represented by 2/100<NCF/NCH<300/100, and a wet electrophotographic apparatus using the electrophotographic photosensitive body.

Abstract: A driving means 6 is placed below a photoconductor drum 2. The driving means 6 includes first to fourth developing rollers 13A-13D and toner storage chambers 11A-11D. The developing means 6 can be shifted by a developing-device moving motor 9 to bring one of the developing rollers 13A-13D which corresponds to one of liquid toners 12A-12D to be developed in close to the photoconductor drum 2, followed by developing a latent image formed by an exposure. At this time, the distance between one of the developing rollers 13A-13D and the photoconductor drum 2 can be appropriately adjusted. In addition, before the development, meniscus of the liquid toner is quickly formed between the developing rollers 13A-13D and the photoconductor drum 2 by rotating the development rollers 13A-13 at the rotation speed higher than the rotation speed thereof at the development.

Abstract: A developing solution feeder of a wet type electrophotographic color printer includes a plurality of circulation tanks for storing the developing solution to be fed to a developing unit; a plurality of injection nozzles for jetting the developing solution stored in the circulation tanks to a developing gap of the developing unit; a plurality of ink storage tanks and a carrier storage tank for respectively storing the condensed ink of a certain color and a carrier to be fed to the circulation tanks, respectively; a waste tank for collecting the waste developing solution produced from the circulation tanks; a refill cartridge for the supplementation of the condensed ink or the carrier; developing solution refilling/waste developing solution collecting means for refilling the ink storage tanks or the carrier storage tank with the condensed ink or the carrier, respectively, and for evacuating the waste developing solution collected in the waste tank to the empty refill cartridge; and ink injecting/constant feedin

Abstract: A low cost process multicolor image reproduction machine includes a rotatable endless toner image receiving and transfer member for cyclically building up a multicolor image from a plural number of received color separation toner images; a sheet handling system including a back up roller defining a toner image transfer nip against the rotatable endless toner image receiving and transfer member; a rotatable photoreceptor member forming a contact electrostatic printing (CEP) nip with the rotatable endless toner image receiving and transfer member for separating toner image areas from toner background areas of a color separation toner image formed on the photoreceptor member; imaging devices for cyclically forming a plural number of color separation toner images on the photoreceptor member, and a controller for controlling formation of, and build up into a multicolor toner image, of the plural number of color separation images, as well as, transfer of the multicolor toner image onto a copy sheet.

Abstract: Provided a color recording device for developing a color image with the use of liquid developer in which toner is dispersed, in which liquid developer having a high toner density is preferably used for printing a fine image, which however causes a problem of precipitation of toner or the like. Thus, at least four liquid type color developing units using liquid developer having a high toner density of 5 to 35% are arranged on a rotary base which is rotated so that the developing units are changed over so as to be respectively opposed to a recording medium, and each of the developing units is composed of a cartridge bottle in which the liquid developer is pooled, a supply passage for supplying the liquid developer pumped up from the cartridge bottle onto a pump-up roller for feeding the liquid developer pumped up onto a developing roller. The supply passage can supply a regulated quantity of the liquid developer in association with the rotation of the rotary base.

Abstract: A liquid development and transfer apparatus includes a plurality of developing electrodes for supplying developing solution to an electrostatic latent image carrier surface. The length of an effective development area adjacent the plurality of developing electrodes is made longer than the product of the minimum required for development to obtain a reflection density of 1.2 or greater and the moving speed of the image carrier surface. A first development electrode is a dish-type electrode and a second development electrode is a rotating roller electrode.

Abstract: A multi-color image formation apparatus that has multiple developed image formation devices, each corresponding to one color. Each of the developed image formation devices has a photosensitive member, charging apparatus that charges the photosensitive member, exposure apparatus that exposes the charged photosensitive member, and developing apparatus that supplies highly viscous and highly concentrated color liquid developing agent to the surface of the latent image on the photosensitive member. Each of the developed image formation devices is provided with transfer apparatus that sequentially transfers the developed images, each of which has been formed on the surface of the latent imgae on one of the photosensitive members, to the paper transported by the transfer belt and thereby forms a color image on the paper. An electrostatic latent image is formed on a photosensitive member such that a developed image corresponding to the desired print image remains on the developing agent bearing member.

Abstract: An ink leakage prevention system, for a liquid electrophotographic printer having a development tray, which includes a chassis, installed at a main body of the printer, a development tray, installed at the lower portion of a development unit and is detachable from the main body of the printer, wherein the developing tray accommodates developer left over after being used by the development unit for developing and which has a discharge portion for discharging the accommodated developer, a drain tray installed at the chassis to drain the developer discharged from the development tray into a circulation tank, and a discharge portion opening/shutting means for closing the discharge portion when the development tray is separated from the drain tray and for opening the discharge portion when the development tray is coupled to the drain tray.

Abstract: A method for controlling concentration of a developer in a developing reservoir of a wet printer includes the steps of counting image data output from a system controller to a laser scanning unit to form an electrostatic latent image on a photosensitive medium, calculating the amount of a consumed toner supplied from the developing reservoir to the photosensitive belt according to a value counted in the counting step of formation of the electrostatic latent image, and supplying toner from a toner supplying unit into the developing reservoir to refill the amount of the consumed toner calculated in the calculation step. The developer also includes a liquid carrier element. Thus, the ratio of the toner to liquid carrier element in the developing reservoir may be maintained within a predetermined range, without having an additional apparatus for measuring the concentration of the developer.

Abstract: In an image forming apparatus, a developing device develops an electrostatic latent image formed on an image carrier with a developing liquid to thereby produce a corresponding toner image. The toner image is transferred from the image carrier to an intermediate transfer body. To increase a transfer ratio from the intermediate transfer body to a paper or similar recording medium, charge applying device applies to the toner image transferred to the intermediate transfer member a charge identical in polarity with toner particles forming the toner image. A roller member faces the surface of the intermediate transfer body to which the toner image is transferred for cleaning the transfer body and removing a carrier liquid. The roller member also controls the amount of carrier liquid on the intermediate transfer body.

Abstract: In an electrophotographic printing machine, a layer of insulating fluid containing micelles is positioned over a photoreceptor. The micelles are migrated onto the surface of the photoreceptor. The photoreceptor is exposed to inject charge carriers into the insulating fluid and selectively neutralize micelles to form an electrostatic latent image. The latent image is transferred to a dielectric surface and developed.

Abstract: In the particular embodiments described in the specification, a liquid electrophotographic developing arrangement includes four developing units disposed adjacent to the image-bearing surface of an electrophotographic member, each developing unit containing a different color developer. Each developing unit has an elongated slit through which developer is applied to the image-bearing surface of the electrophotographic member and the liquid developer is magnetically retained in the space between the developing unit and the surface of the electrophotographic member. In one embodiment, the developer is retained by a ferrofluid which surrounds the elongated opening and is held in position by magnets disposed on opposite sides of the electrophotographic member.

Abstract: An ion flow recording apparatus performs recording making density modulation every pixel. When developing on a fine grain toner is to be performed using a liquid developer for an electrostatic latent image, a developing unit (developing roller) is disposed to face a direction of gravity. Namely, a control valve is provided on a pipe for application of a developer to the developing roller or on a joint portion between the pipe and a developer tank, developing units of different two colors are joined to their developer tank portions, and a rotary shaft is provided on the joint portion to be positioned at a point of symmetry to provide alternate use of the two developing units upon turning them. Therefore, developing for a plurality of colors can be simply performed, and such turning of the developing units enables prevention of the toner from deposition in the liquid developer during developing, thereby making it possible to perform a clear recording.

Abstract: An image formation apparatus for performing development by supplying to a photosensitive body a developing solution containing toner includes a developing roller; a developing solution supply port; a squeeze roller for wiping off an unnecessary portion of the developing solution from the photosensitive body; a moving frame reciprocally moving toward/from the photosensitive body; a squeeze support body for holding the squeeze roller; and two elastic bodies having different natural lengths that are provided between the moving frame and the squeeze support body and can be expanded and contracted for urging depression of the squeeze roller toward the photosensitive body.