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Plural diverse (e.g., color)

Subclass of:

399 - Electrophotography

399130000 - IMAGE FORMATION

399222000 - Development

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
399226000 Plural applicators single position 20
399228000 Selectively active 14
399233000 Liquid 5
20090123188Liquid Developer and Image Forming Apparatus - 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):05-14-2009
20100074654Liquid Developer and Image Forming Apparatus - 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.03-25-2010
20090238606Liquid Developer and Image Forming Apparatus - 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):09-24-2009
20100003054Process for Producing Liquid Developer, Liquid Developer, and Image Forming Apparatus - 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.01-07-2010
20100014894Liquid Developer and Image Forming Apparatus - 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.01-21-2010
399231000 Toner images overlapped 3
20090123187Liquid Developer and Image Forming Apparatus - 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):05-14-2009
20090148188TONER SUPPLYING APPARATUS AND TONER SUPPLYING METHOD FOR IMAGE FORMING APPARATUS - An image forming apparatus includes plural developing devices arranged at a fixed interval, plural toner cartridges arranged at an interval smaller than the interval among the developing devices, and plural sub-hoppers that receive toners stored in the toner cartridges and feed the toners to plural developing devices. The plural sub-hoppers respectively have toner receiving ports formed in positions opposed to toner discharging ports of the toner cartridges and have toner supply ports for feeding toners to the developing devices. The plural sub-hoppers are arranged at an interval same as an arrangement pitch of the developing devices.06-11-2009
20090016776PRINTING OF RAISED MULTIDMENSIONAL TONER BY ELECTOGRAPHY - Electrographic printing of raised multidimensional toner shapes having a particular profile by electrographic techniques. Such electrographic printing comprises the steps of forming a desired print image, electrographically, on a receiver member utilizing predetermined sized marking particles; and, where desired, forming a final predetermined multidimensional shape utilizing marking particles of a predetermined size or size distribution.01-15-2009
399224000 Adding toner 2
20110116840Multicolor electrophotographic print engine - A method and system for printing image documents using a variety of toners where some toners using a multi-development station having two or more development stations. These toners are co-printed prior to fixing, on the receiver by the multi-development station.05-19-2011
20110176834IMAGE FORMING APPARATUS AND DEVELOPER CONTAINER THEREFOR - An image forming apparatus includes a plurality of developing units respectively including developer inlets, the developing units are arranged side by side in a first direction, a plurality of developer containers to contain developers to be supplied to the plurality of developing units and respectively including developer outlets, the developer units are arranged side by side in the first direction to face the plurality of developing units, and a plurality of developer supplying paths respectively to connect the developer inlets to the developer outlets, wherein the plurality of developer containers include first and second developer containers, and a position of the developer outlet of the second developer container is different from position of the developer outlet of the first developer container.07-21-2011
399225000 Single applicator 1
20090169262Developing device, image forming apparatus and developer cartridge - A developing device includes: a developer carrying member that supplies developer to an image carrying member; plural developer supply members,.containing different color developers, that supply the developers to the developer carrying member in a developer supply position; a conveyance member that sequentially conveys the plural developer supply members to the developer supply position; and a peeling member that peels off developer, remained after supply of the developer by the developer carrying member to the image carrying member, from the developer carrying member.07-02-2009
Entries
DocumentTitleDate
20100061766IMAGE FORMING APPARATUS - An image forming apparatus can include a first developing portion having first to fourth developing devices containing yellow, magenta, cyan, and black developers, respectively, each of the first to fourth developing devices being disposed apart from adjacent developing devices of the first to fourth developing devices at a regular interval, a second developing portion to include at least one auxiliary developing device to supplement colors of the first developing portion, and an image carrier to convey images of the first and second developing portions, wherein an interval between the first and second developing portions is a multiple of the regular interval between the first to fourth developing devices.03-11-2010
20090190957Image forming apparatus - An image forming apparatus includes a plurality of developing devices. Each developing devices performs an electrophotographic process to form an image. The image forming apparatus comprises a first developing device and a second developing device. The first developing device holds a black developer containing a first black coloring agent. The second developing device holds a gray developer. The gray developer contains a second black coloring agent and a coloring agent of a chromatic color. The chromatic color is a complementary color to the second black coloring agent.07-30-2009
20100074653Image forming apparatus - An image forming apparatus is capable of printing a position-coding pattern. A first print engine prints a position-coding pattern and holds a first developer material therein. A plurality of second print engines each print a corresponding image in accordance with print data, the image being different from the position-coding pattern, each of the second print engines holding a corresponding second developer material therein. The first developer material is charged to a first average amount of charge and has a first distribution of amount of charge. The second developer material is charged to a second average amount of charge and has a second distribution of amount of charge, such that the first average amount of charge is larger than the second average amount of charge, and that the first distribution of amount of charge has a smaller standard deviation than the second distribution of amount of charge.03-25-2010
20130078001IMAGE FORMING APPARATUS - An image forming apparatus includes a first image forming unit configured to form a white developer image on a recording medium using a white developer, at least one second image forming unit configured to form at least one single-color developer image on the recording medium using at least one single-color developer other than the white developer, and a fixing unit configured to fix the white developer image and the at least one single-color developer image to the recording medium so as to form a white image and at least one single-color image. A haze value of the white image is higher than a haze value of each of the at least one single-color image.03-28-2013
20120163870IMAGE FORMING APPARATUS - In order to output a print with high gloss uniformity, a transparent toner is consumed in a large amount. For that reason, when a constitution of a color developing device and a constitution of a transparent developing device are made substantially identical, a charge amount of the transparent toner is lowered with continuous image formation. In a state in which the transparent toner is not sufficiently charged, an electrostatic image formed on a photosensitive member cannot be sufficiently developed with the toner.06-28-2012
20130089360Image Forming Apparatus and Developing Agent Cartridge - An image forming apparatus may include a casing, and a plurality of image carriers arranged in parallel along one direction in the casing and formed with an electrostatic latent image. The apparatus can further include a plurality of developing agent carriers opposed to the image carriers, for visualizing the electrostatic latent image by feeding a developing agent to the image carriers, and a plurality of developing agent cartridges, arranged in parallel in the one direction to be opposed to the developing agent carriers in the longitudinal direction of the developing agent carriers, and configured to be together attachable/detachable to/from the casing along the one direction, for accommodating the developing agent fed to the developing agent carriers.04-11-2013
20130071143ANTIBACTERIAL AND ANTIFUNGAL PROTECTION FOR TONER IMAGE - A method of forming a clear toner overcoat or a colored toner image on a substrate is disclosed. The overcoat or colored image provides antibacterial and antifungal protection. The method includes providing a source of toner having a mixture of polymer agent and a silver salt biocide including a silver sulfate biocide having a concentration range of 0.0005 to 10 weight %, applying the clear toner or colored toner in an image wise fashion to a substrate, and fixing the clear or colored toner to the substrate whereby an effective coating or image is formed that provides antibacterial and antifungal protection.03-21-2013
20090092417OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME - Light sources emit light beams onto deflecting surfaces of a deflecting unit through incident optical systems. The deflecting unit deflects the light beams in a uniform direction to form images onto different surfaces to be scanned through imaging optical systems. An optical path length, or a distance from a deflection point of the deflecting unit to a surface to be scanned, of an imaging optical system to form an image onto a surface to be scanned closest to the deflecting unit is different from that of an imaging optical system to form an image onto a surface to be scanned farthest from the deflecting unit. Also, the following condition is satisfied:04-09-2009
20090257780IMAGE FORMING APPARATUS - In an image forming apparatus that includes an image carrier, a charging unit, a latent-image forming unit that forms a latent image for each color by exposing the surface of the image carrier charged by the charging unit, and a plurality of developing units that sequentially develops latent images formed on the image carrier with toners of different colors including at least cyan, yellow, and magenta, to form a color toner image on a single unit of the image carrier, the developing units further develops the latent images with toners of blue, green, and red, such that the toner images of different colors are not superimposed on a same position.10-15-2009
20120237263IMAGE FORMING APPARATUS - An image forming apparatus is provided, which is configured to form an image with developer of a plurality of colors on a sheet-type recording medium by a non-magnetic single component developing method. The image forming apparatus includes a first color developing unit which is configured to perform developing of a first color by a jumping developing method, and a second color developing unit which is configured to perform developing of the second color by a contact developing method.09-20-2012
20090123186ELECTROSTATIC IMAGE DEVELOPING TONER, TONER KIT AND IMAGE FORMING APPARATUS - A toner is provided that comprises a colorant and a binder resin, wherein the binder resin comprises a polyester resin that is prepared by a polycondensation reaction in the presence of at least a titanium-containing catalyst expressed by General Formula (II) or (II), the toner has a volume average particle diameter of 2.0 μm to 10.0 μm and a ratio Dv/Dn within a range of 1.00 to 1.40, in which Dv represents a volume average particle diameter and Dn represents a number average particle diameter,05-14-2009
20120163869Secure document printing method and system - A method and system for printing documents with one or more embedded security features is provided. Security features are embedded in the document by co-printing magnetic and non-magnetic toner on a receiver before fixation by a fixing station. The combination of magnetic and non-magnetic toners in the image results in image elements that easily show alteration or are undetectable by visual means.06-28-2012
20090087221Image forming apparatus - An image forming apparatus includes a plurality of image forming units for forming a developer image on an image supporting member; a transfer unit for transferring and overlapping the developer image on a medium to form a developer laminated portion; and a fixing unit for fixing the developer laminated portion. One of the image forming units uses transparent developer having a softening point higher than that of color developer used in the other of the image forming units, and having an average particle size larger than that of the color developer.04-02-2009
20120033995IMAGE FORMING APPARATUS - An image forming apparatus includes: a first image forming unit including an image carrier and a developer carrier which is in contact with the image carrier at a first pressure, and which carries a first developer; and a second image forming unit including an image carrier, and a developer carrier which is in contact with the image carrier at a second pressure greater than the first pressure and which carries a second developer.02-09-2012
20120107019IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - A technology for controlling the generation of damages of a photoconductive surface caused due to the attachment of a carrier to a photoconductor in an image forming apparatus using a two-component developing agent is provided. An image forming apparatus is configured to include an intermediate transfer body having prescribed elasticity on a transfer surface onto which a toner image is transferred; plural image carriers which transfer a toner image onto the transfer surface and which are disposed along a movement direction of the transfer surface of the intermediate transfer body; plural development sections which form toner images having a different color from each other with respect to the plural image carriers by using a two-component developing agent made of a toner and a carrier; and developing agent replenishment sections which replenish a toner and a carrier in the development sections.05-03-2012
20090142100MULTIPLE-CHANNELED LAYER PRINTING BY ELECTROGRAPHY - Electrographic printing of one or more multi-channeled layers having a particular pattern by electrographic techniques. Such electrographic printing comprises the steps of forming a desired print image, electrographically, on a receiver member utilizing predetermined sized marking particles; and, where desired, forming one or more final multi-channeled layers utilizing marking particles of a predetermined size or size distribution.06-04-2009
20080317505SINGLE-PASS BYPASS PRINTING METHOD AND APPARATUS - A single-pass bypass printing machine including: (a) a moveable photoreceptor belt for moving through an imaging path; (b) apparatus for supplying and feeding print media along a main media path and a bypass media path; (c) a first stage including at least three imaging subassemblies for forming a first color toner image on the photoreceptor; (d) a first transfer station for transferring the first color toner image onto the print media; (e) apparatus for diverting the print media from the main media path onto the bypass media path; (f) a second stage including at least one marking engine for forming a second color toner image on the photoreceptor; (g) apparatus for moving the print media from the bypass media path back into the main media path; and (h) a second transfer station for transferring the second color toner image onto the print media, forming a desired multi-color toner image on the print media.12-25-2008
20120195643IMAGE FORMING APPARATUS AND RECORDING MEDIUM - An image forming apparatus includes first and second image forming units. The first image forming unit forms a first image on a surface of a recording medium which has ratios of reflecting incident light. The second image forming unit forms a second image on the surface. The ratios of the recording medium are equal to or greater than a threshold value in all of a specular direction and a specific direction other than the specular direction. The first image has a ratio of reflecting the incident light in the specular direction being equal to or greater than the threshold value and a ratio of reflecting the incident light in the specific direction being less than the threshold value. The second image has the ratios of reflecting the incident light in the specular direction and in the specific direction being less than the threshold value.08-02-2012
20100014893MULTI-MODE LONG LIFE MONOCHROME PRINTING SYSTEM - A multi-mode, long life monochrome printing system that includes (a) a media supply assembly having a media path (b) a moveable intermediate transfer member for receiving images from image output terminal assemblies and for transferring the images to media on the media path; and (c) a plural number of monochrome image output terminal (IOT) assemblies adjacent the moveable intermediate transfer member, each monochrome image output terminal (IOT) assembly being selectably moveable into and out of image transfer relationship with the moveable intermediate transfer member, and each monochrome image output terminal (IOT) assembly having a development unit including developer material having essentially a same color.01-21-2010
20080317506Image Forming Apparatus - An image forming apparatus is provided which includes a switching mechanism which selectively shifts developing rollers among an all-color non-contact state in which all photosensitive members are kept apart from the corresponding developing rollers, a black contact state in which only the photosensitive member for black is kept in contact with the corresponding developing roller, and an all-color contact state in which all the photosensitive members are kept in contact with the corresponding developing rollers, and a control section which, when an operation mode of the apparatus is shifted from a color mode to a monochrome mode, causes the switching mechanism to shift the developing rollers from the all-color contact state to the all-color non-contact state to perform a transferring process to once transfer developing agents from recovery members onto the corresponding photosensitive members and further transfer the developing agents from the photosensitive members onto a transfer belt.12-25-2008
20100239321IMAGE FORMING APPARATUS AND IMAGE FORMING SYSTEM - An image forming apparatus includes a first development unit, a second development unit, and a control unit. The first development unit forms a first developer image with a first developer absorbing a light having a prescribed wavelength. The second development unit forms a second developer image with a second developer permeating the light having prescribed wavelength therethrough. The control unit controls print of a background design image by the first development unit and print of a print image by the second development unit.09-23-2010
20090074465IMAGE FORMING APPARATUS AND TONER SUPPLYING APPARATUS - An image forming apparatus includes plural developing devices, plural toner cartridges, and plural sub-hoppers that receive toners stored in the respective toner cartridges and supply the toners to the respective developing devices. The plural sub-hoppers are coupled by a coupling member. The coupled plural sub-hoppers are detachably held between the toner cartridges and the developing devices.03-19-2009
20090214263IMAGE FORMING APPARATUS, AND DEVELOPING DEVICE AND DEVELOPING UNIT THEREOF - An image forming apparatus includes developing units designed to have an appropriate developer storage capacity in consideration of developer consumption, and improved convenience of use. The image forming apparatus also includes an image carrier, and plural developing units arranged along a rotating direction of the image carrier to supply developers to the image carrier. The plural developing units include a first developing unit having the largest developer storage capacity and a second developing unit having the second largest developer storage capacity after the first developing unit.08-27-2009
20090214262IMAGE FORMING APPARATUS AND DEVELOPING UNIT THEREOF - An image forming apparatus to enhance a user's convenience by adequately designing developer storage capacities of developing devices in consideration of an amount of consumed developer includes an image carrier, and plural developing devices arranged along a rotational direction of the image carrier to supply a developer to the image carrier. The plural developing devices include a first developing device having a largest developer storage capacity, and a second developing device disposed in a most downstream side with respect to the rotational direction of the image carrier. The second developing device has a second largest developer storage capacity.08-27-2009
20110116839DEVELOPING AGENT - The developing agent is selected to have a distribution of adhesive force to the surface of an image carrier, which is configured such that the ratio of the developing agent having an adhesive force which is not less than 2.5 times as high as an average value of a distribution of adhesive force is 3% by weight or less based on an entire weight of the developing agent.05-19-2011
20090028607COLOR IMAGE FORMING APPARATUS AND COLOR IMAGE FORMING METHOD - There is provided a tandem color image forming apparatus and the like, which is capable of suppressing the generation of black spots during a continuous image forming process, even though a non-magnetic single-component developer is used and a cleaner-less type is adopted. The color image forming apparatus is a tandem type that includes a plurality of image carriers and a cleaner-less type that does not include a blade cleaner, wherein the resistance per square centimeter of a base body of an image carrier using for at least a black developer among the plurality of image carriers, or the resistance per square centimeter of the base body through an intermediate layer is set in a range of 1×1001-29-2009
20110164900IMAGE FORMING APPARATUS - An image forming apparatus includes a first image forming portion for forming a developer image, said first image forming portion including a first image supporting member for forming a static latent image and a first developing member for attaching developer to the static latent image; a second image forming portion for forming a developer image, said second image forming portion including a second image supporting member for forming a static latent image and a second developing member for attaching developer to the static latent image; a transfer portion for transferring the developer image to a printing medium; and a fixing unit for fixing the developer image to the printing medium. The second developing member has a surface roughness greater than that of the first developing member. The fixing unit is disposed at a position closer to the first image forming portion relative to the second image forming portion.07-07-2011
20110026972IMAGE FORMING APPARATUS - An image forming apparatus forming a color image on a recording material mounts black and non-black process cartridges including a photosensitive drum and a developing roller and includes a driving source; first and second clutches connecting and disconnecting the driving source and the developing roller of the black and non-black cartridges, respectively; first and second members actable on the first and second clutches, respectively, each for switching between operation and non-operation states for respectively transmitting and not transmitting a driving force to the developing rollers; and a switching member, movable by the driving force of the driving source and actable on the first and second members for switching among first, second, and third modes, for respectively transmitting the driving force to the developing rollers of all of the process cartridges, to any one of the developing rollers, and only to the developing roller of the black process cartridge.02-03-2011
20110116838DUAL DIVERTER - A method and system for printing image documents using a variety of toners where some toners using a multi-development station having two or more development stations. These toners are co-printed prior to fixing, on the receiver by the multi-development station.05-19-2011
20110262186IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus forms an excellent-quality image by using a recycle developer obtained by recovering a developer remaining on an image carrier. The apparatus includes: an image carrier on which a developer image is formed, and which transfers the formed developer image to a material to be transferred at a transfer position; plural developing units supplying developer of corresponding colors to the image carrier; a cleaner disposed downstream of the transfer position in the rotating direction of the image carrier with respect to the image carrier, removing the developer remaining on the surface of the image carrier, and recovering the removed developer; a recycle developer storage unit storing the developer recovered by the cleaner therein; a recycle developer developing unit supplying the developer stored in the recycle developer storage unit to the image carrier; and a control unit controlling a recycle developer adjustment by supplying the developer from at least one of the plural developing units to the image carrier, forming a developer image on the image carrier, allowing the developer image to pass through the transfer position without being transferred onto the material to be transferred, and allowing the developer of the developer image to be recovered in the cleaner to supply the developer to the recycle developer storage unit.10-27-2011
20100232836SYSTEMS AND METHODS OF PRODUCING GRADIENT INDEX OPTICS BY SEQUENTIAL PRINTING OF TONERS HAVING DIFFERENT INDICES OF REFRACTION - Systems and methods of producing image products using printing are provided. The image products are produced by sequentially applying a base image, a first clear toner and a second clear toner. The first clear toner forms one or more lenses, and the first and second clear toners have different indexes of refraction. The image products produced by the systems and methods can be lenticular image products that display different images depending upon a viewing angle.09-16-2010
20120207515MULTICOLOR ELECTROPHOTOGRAPHIC PRINT ENGINE - A method and system for printing image documents using a variety of toners where some toners using a multi-development station having two or more development stations. These toners are co-printed prior to fixing, on the receiver by the multi-development station.08-16-2012
20110008071FULL COLOR IMAGE FORMING METHOD - Provided is a full color image forming method wherein high color reproducibility especially on a blue system and a green system can be obtained and an excellent gradation property can be obtained in a full color image to be obtained. The full color image forming method for forming a full color image by using at least yellow toner, magenta toner, and two kinds of cyan toners (1, 2) is characterized in that a toner image formed by the cyan toner (1) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of lightness (L*) in a color space represented by an L*a*b* colorimetric system of not less than 30 and not more than 52, and that a toner image formed by the cyan toner (2) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of the lightness (L*) in the color space represented by the L*a*b* calorimetric system of not less than 58 and not more than 75.01-13-2011
20100290812IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus forms a stamp image with a stamp image developer having a color developing temperature at a color erasing temperature of an image forming developer, and forms a mask image with a mask image developer having a color re-developing temperature at a temperature not lower than a color re-developing temperature of the image forming developer. Accordingly, when a confidential document is color-erased, the stamp image develops color, and when the color-erased confidential document again develops color, it can not be read.11-18-2010
20100092215PRINTING SYSTEM WITH TONER BLEND - An improved electrostatic printing method includes printing a first marking material, such as a fully colorized toner, and also printing a second marking material on the same area of the print substrate. The second marking material is a mixture of two toners, where at least one of the two toners has a lower color strength than the first marking material. The second marking material has the same hue as the first marking material, and the ratio of toners in the mixture is such that the second marking material has a color strength matching that of an undesirable optical density printing rage of the first marking material.04-15-2010
20120177410IMAGE FORMING APPARATUS, OUTPUT DEVICE, COMPUTER-READABLE MEDIUM AND RECORDING MEDIUM - An image forming apparatus includes a first image-forming material that contains a colored pigment and a second image-forming material that contains the colored pigment having a concentration lower than that of the first image-forming material, a first image forming unit that forms a code image representing encoded information on a recording medium using the second image-forming material, and a second image forming unit that forms a non-code image at a position other than the position of the code image on the recording medium using an image-forming material other than the second image-forming material.07-12-2012
20090060584IMAGE FORMING APPARATUS - An image forming device includes a plurality of image forming units provided in parallel comprising a black image forming unit to form a black toner image and a plurality of color image forming units to form color toner images, an intermediate transfer device to primarily transfer color toner images formed by superimposing the toner images formed at each image forming unit, and a secondary transfer unit to transfer the color toner image to a transfer paper. The color image forming unit employs a non-magnetic-contact-type single-component development device to develop each color toner image with a single-component developer, and the black image forming unit is provided closest to the secondary transfer unit and employs a contact-type two-component development device to develop a black toner image with a two-component developer.03-05-2009
20120082484IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - According to one embodiment, there are provided a developing section storing a color erasable developing agent that includes capsule colorant particles with a core in which a color developable compound, a color developing agent, and a color erasing agent are contained, and a developing section storing a binder resin-containing transparent developing agent. A transparent developing agent image is transferred to a region capable of covering a color erasable developing agent image and the resulting image is fixed.04-05-2012
20120321350IMAGE FORMING APPARATUS - According to one embodiment, an image forming apparatus includes an image forming portion configured to selectively form a toner image on an image bearing member using a developing device including a decolorizable toner or a developing device including an undecolorizable toner, a transfer portion configured to transfer the toner image, which is formed on the image bearing member, onto a transfer material, and a fixing portion configured to fix the toner image, which is transferred by the transfer portion, on the transfer material. The undecolorizable toner has at least a fixing temperature range in a range equal to or higher than a fixing temperature lower limit of the decolorizable toner and lower than decoloring temperature of the decolorizable toner.12-20-2012
20110158695CLUTCH MECHANISM AND PROCESSING DEVICE AND IMAGE FORMING APPARATUS COMPRISING THE CLUTCH MECHANISM - Clutch mechanism includes support plate, input element to which driving force is input, output element configured to rotate upon receiving driving force, first elastic member configured to bias output element toward support plate, first member including sliding arm inserted through through-hole of support plate and first slide surface, and second member configured to accommodate first member and including second slide surface. Insertion of the sliding arm into through-hole prevents rotation of first member with respect to support plate but allows first member to approach and move away from support plate. Output element moves apart from input element to cut off driving force when second member is in first rotational position. When second member rotates to second rotational position, output element outputs driving force transmitted from input element.06-30-2011
20080240788FOUR DRUM, EIGHT COLOR TANDEM XEROGRAPHIC ARCHITECTURE - A xerographic system and method use a tri-level development process in which at least one xerographic imaging unit includes a photoreceptor and a pair of developer units. A first developer unit includes a full strength toner of a given color and a second developer unit includes a reduced strength toner of the same or substantially the same color. By use of the tri-level process, excellent color-to-color registration can be achieved for each processed color separation. Moreover, by use of two strengths of the same colorant, a tighter control of the tone reproduction curve can be achieved. Additional xerographic imaging units can include a developer unit that provides spot color, custom color or specialty color capabilities. Additional benefits and gamut expansion can be achieved through use of a tandem architecture. A preferred implementation uses a four drum, eight color tandem architecture with full strength and reduced strength toners formulations of Cyan, Magenta, Yellow, and Black (CYMK) colorant.10-02-2008
20130142546Image-Forming Device Having Mechanism for Separating Developing Rollers from Photosensitive Drums - An image-forming device includes image carrying members aligned in a first direction in a main casing, one of the image carrying members being for black color, and remaining ones of the image carrying members being for other colors; a developing members provided in one-to-one correspondence with the image carrying members, each of the developing members configured to contact a corresponding image carrying member, one of the developing members being for black color, and remaining ones of the developing members being for other colors r; and a first contact/separation member linearly movable in the first direction, the first contact/separation member being disposed on one side of the plurality of developing members. The first contact/separation member comprises an elongated shape in the first direction. The first contact/separation member comprises a separating surfaces configured to contact respective developing members to separate the developing member from the image carrying member.06-06-2013
20120251184Image Forming Apparatus - An image forming apparatus includes a rotation driving source, a black developing unit, a color developing unit, a first gear, a second gear, a development drive transmission mechanism and a switching mechanism. The development drive transmission mechanism includes a first intermediate gear and a second intermediate gear. The switching mechanism includes a linear cam member configured to move linearly and to move the first intermediate gear and the second intermediate gear such that: in the first mode, the first gear engages the first intermediate gear and the second gear engages the second intermediate gear; in the second mode, the first gear engages the first intermediate gear and the second gear is disengaged from the second intermediate gear; in the third mode, the first gear is disengaged from the first intermediate gear.10-04-2012
20130156466IMAGE FORMING APPARATUS - An image forming apparatus comprising: a plurality of housing units that houses toners of mutually different colors, at least one toner inside of the plurality of housing units being to be used for forming a toner image on a recording medium; and a fixing unit configured to fix the toner image on the recording medium to the recording medium, wherein a housing unit among the plurality of housing units that houses a toner with a lowest peak temperature of loss elastic modulus is disposed in a portion with a lower temperature than a temperature of a portion where another housing unit is disposed, or in a position farther from the fixing unit than a portion where another housing unit is disposed.06-20-2013
20110311277Image forming apparatus and process cartridge incorporated therein - A tandem-type electrophotographic image forming apparatus includes multiple color image forming units using a dry toner, a first black image forming unit using the dry toner, and a second black image forming unit using a wet toner and performs an image formation with the dry toner in a first printing mode and an image formation with the wet toner in a second printing mode. The image formed in the second printing mode with the wet toner is fixed to a recording medium at a temperature lower than the image formed in the first printing mode with the dry toner. Each of the image forming units corresponds to a process cartridge that is removably installable in the tandem-type electrophotographic image forming apparatus and including an image carrier and other image forming components integrally therein.12-22-2011
20130195508IMAGE FORMING APPARATUS - An image forming apparatus includes a latent image carrier, a first developing unit, a second developing unit, a transfer unit, a removing member, and a fixing unit. An average circularity of particles having an average particle diameter of no less than 100 nm and no more than 300 nm among particles included in a second external additive is less than an average circularity of particles having an average particle diameter of no less than 100 nm and no more than 300 nm among particles included in a first external additive.08-01-2013
20120087697IMAGE FORMING APPARATUS THAT INCLUDES A FIRST DEVELOPING DEVICE THAT HOLDS A BLACK DEVELOPER AND A SECOND DEVELOPING DEVICE THAT HOLDS A GRAY DEVELOPER - An image forming apparatus includes a plurality of developing devices. Each developing devices performs an electrophotographic process to form an image. The image forming apparatus comprises a first developing device and a second developing device. The first developing device holds a black developer containing a first black coloring agent. The second developing device holds a gray developer. The gray developer contains a second black coloring agent and a coloring agent of a chromatic color. The chromatic color is a complementary color to the second black coloring agent.04-12-2012

Patent applications in class Plural diverse (e.g., color)

Patent applications in all subclasses Plural diverse (e.g., color)