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| Number | Title | Issue Date |
| 7941075 | Image forming apparatus including a cleaner-less image carrier cleaning system An image forming apparatus includes an image carrier, a charging unit including a charge member that is disposed facing the image carrier across a gap therebetween and charges the image carrier by using electrical discharge caused by applying thereto a voltage inclu... | 05/10/2011 |
| 7903999 | Image forming apparatus An image forming apparatus includes a photosensitive member; a developing device for developing an electrostatic image formed on said photosensitive member into a toner image; a transfer charger for transferring a toner image from said photosensitive member onto an ... | 03/08/2011 |
| 7853177 | Electrophotographic image forming apparatus having transparent toner and printing method thereof An electrophotographic image forming apparatus. The apparatus includes first and second photosensitive bodies, first and second exposing units to form electrostatic latent images on the first and second photosensitive bodies respectively charged to a uniform electri... | 12/14/2010 |
| 7848680 | Image forming apparatus and toner collection method There is provided a technique in which in a four-rotation intermediate transfer system image forming apparatus, even in a state where a large amount of transfer residual toner is generated, the occurrence of color mixture of toners can be effectively suppressed.... | 12/07/2010 |
| 7792463 | Image forming apparatus including a brush member to temporarily capture toner A brush member includes plural raisings and contacts a surface of an image bearer downstream of a transfer station and temporary captures toner remaining on the surface of the image bearer into the brush member in a toner capturing process. The brush member returns ... | 09/07/2010 |
| 7773913 | Image forming apparatus An image forming apparatus includes first and second image forming units each including a charging device and a development device using a developer including a mixture of toner and carrier, a transfer device for serially transferring toner images onto a transfer me... | 08/10/2010 |
| 7751753 | Cleanerless image forming apparatus A cleanerless image forming apparatus configured to reduce the density unevenness of halftone images. The apparatus includes a photosensitive member, a charging roller device for uniformly charging the surface of the photosensitive member, an optical writing unit fo... | 07/06/2010 |
| 7715758 | Apparatus and method for cleaning residual toner from drums in an image forming apparatus An apparatus and method for cleaning a plurality of drums in an image forming apparatus includes applying a first bias to each of a plurality of disturbing members, each disturbing member associated with a corresponding drum of a plurality of drums. While performing... | 05/11/2010 |
| 7593669 | Image forming apparatus An image forming apparatus includes an exposure device for exposing an electrically charged surface of an image bearing member to light to form an electrostatic image; a developing device capable of collecting a transfer residual developer remaining on the image bea... | 09/22/2009 |
| 7499664 | Image processing apparatus, process cartridge, and cleaning system with residual toner retaining unit A transfer residual toner that has not been electrostatically transferred onto a transfer paper P at a transfer nip and remains on a surface of a photosensitive element is temporarily retained by an elastic blade of a toner retaining unit in a mechanical manner befo... | 03/03/2009 |
| 7486913 | Apparatus and method for cleaning residual toner from drums in an image forming apparatus An apparatus and method for cleaning a plurality of drums in an image forming apparatus includes applying a first bias to each of a plurality of disturbing members, each disturbing member associated with a corresponding drum of a plurality of drums. While performing... | 02/03/2009 |
| 7480473 | Image formation apparatus and process cartridge including a trickle development system and a cleanerless system An image formation apparatus and process cartridge exhibiting high durability, in which such disadvantages as irregular recovery of untransferred toner and the advance of carrier degradation are not produced even when jointly using a trickle development system and a... | 01/20/2009 |
| 7428395 | Image forming apparatus equipped with developing unit to make developing and simultaneous cleaning and image forming method In an image forming apparatus using simultaneous developing and cleaning type developing units, this invention installs brush members to disturb toners remaining on photosensitive drums movably in the direction to contact with photosensitive drums corresponding to t... | 09/23/2008 |
| 7426358 | Image forming apparatus and method having a cleanerless image forming unit There is provided an image forming apparatus comprising a developing device containing a toner having an average particle diameter of 2 to 5 μm and a spherical degree of 1 to 1.2, and a transfer member which is pressed against the image carrier by a pressing force ... | 09/16/2008 |
| 7418223 | Image forming apparatus An image forming apparatus having a plurality of image forming stations each provided with an image bearing member, a developing device for collecting any untransferred toner on the image bearing member and at the same time, developing an electrostatic image with a ... | 08/26/2008 |
| 7398040 | Developing apparatus, cartridge and image forming apparatus A developing apparatus includes a developer carrying member for carrying a developer thereon and developing an electrostatic image formed on an image bearing member with a developer, a developer layer thickness regulating member provided in contact with the develope... | 07/08/2008 |
| 7356291 | Developing unit, image forming apparatus method that supplies inverse transfer preventing agent with inverse polarity An image forming apparatus of the invention holds a first developing agent of a first color and inverse transfer preventing agent, supplies the first developing agent with predetermined potential, supplies the first developing agent to an image portion of an image c... | 04/08/2008 |
| 7349652 | Apparatus and method for cleaning residual toner from drums in image forming apparatus An apparatus and method for cleaning a plurality of drums in an image forming apparatus includes applying a first bias to each of a plurality of disturbing members, each disturbing member associated with a corresponding drum of a plurality of drums. While performing... | 03/25/2008 |
| 7349643 | Image forming apparatus and image forming method having a cleaner and a paper detecting unit An image forming apparatus that forms an image using a photoconductor body includes a switching unit which effects switching between a state in which a cleaner is operated for the photoconductor body, and a state in which the cleaner is not operated for the photocon... | 03/25/2008 |
| 7348118 | Non-magnetic monocomponent toner having excellent developing property at low temperature condition The present invention relates to a non-magnetic mono-component toner composition and a preparation method thereof. Disclosed is a non-magnetic mono-component toner composition prepared by coating a spherical organic fine particle having a weight-average molecular we... | 03/25/2008 |
| 7343109 | Electrophotographic printer having developer and transfer bias control An image forming apparatus including: a developing device that develops an electrostatic latent image formed on an image bearing body into a visible image by using a charged developer, so as to form a developer image on the image bearing body; a developing-bias supp... | 03/11/2008 |
| 7333744 | Image forming apparatus that charges a photosensitive member by superimposing an alternate current bias voltage on a direct current bias voltage as the charge bias voltage A charge apparatus charges by uniformly superimposing an alternate current bias voltage with a fixed frequency over a direct current bias voltage as the charge bias voltage on a photosensitive member. An exposure apparatus exposes the surface of the charged photosen... | 02/19/2008 |
| 7330033 | Noncontact sensor A noncontact voltage sensor is housed in a container comprising a container body having an opening on one side and an insulation cover body for sealing the opening. A plate type electrode insulated from a ground is housed in the container. The cover body side is opp... | 02/12/2008 |
| 7321741 | Image forming apparatus featuring a transparent image forming station to achieve uniform gloss An image forming apparatus includes a plurality of image forming stations and a transferring device. Each image forming station includes an image carrier for carrying an electrostatic image and a developing device for developing the electrostatic image with toner. T... | 01/22/2008 |
| 7317883 | Color image forming apparatus with at least two stages of image forming units A color image forming apparatus in which a developing portion is provided with a mechanism capable of forming a developing agent image and recovering residual developing agent left remained on an image carrier, and an electrification portion of an image-forming unit... | 01/08/2008 |
| 7315711 | Image forming apparatus, process cartridge and cleaningless system An image forming apparatus of includes a developing device bifunctioning as a cleaning device for collecting toner grains left on a photoconductive drum after the transfer of a toner image from the drum to a paper sheet or similar image transfer medium. In the event... | 01/01/2008 |
| 7310484 | Apparatus for forming visible black and white or color images and invisible images The image forming apparatus of the present invention includes a cyan color image formation unit which uses a cyan color toner to form a cyan color image; a magenta color image formation unit which uses a magenta color toner to form a magenta color image; a yellow co... | 12/18/2007 |
| 7309270 | Electron beam apparatus and spacer A spacer on which static electricity is restricted and an electron beam apparatus in which the spacer is provided. In the electron beam apparatus comprising an electron source provided with electron emission devices, a face plate provided with anodes and spacers ins... | 12/18/2007 |
| 7298992 | Process cartridge that accurately disposes brush with respect to image bearing member A process cartridge includes an image bearing member, a brush, and a supporting portion. The brush includes a base member having an elongated plate shape that extends in the longitudinal direction, a brush member including bristles provided on the front surface of t... | 11/20/2007 |
| 7286788 | Image forming apparatus An image forming apparatus includes a photosensitive drum, a charge roller for charging the photosensitive drum, a developing device for developing an electrostatic latent image formed on the charged photosensitive drum with a developer, a first auxiliary charging b... | 10/23/2007 |
| 7283767 | Image forming apparatus and polishing method for image carrier An image forming apparatus comprises: an image carrier driven into rotation; a charger for electrically charging a surface of the image carrier; a latent image forming unit for forming an electrostatic latent image on the charged image carrier surface; a developing ... | 10/16/2007 |
| 7274889 | Image forming apparatus with developer-cleaning capabilities An image forming apparatus comprises: a photosensitive element; a charger electrostatically charging a surface of the photosensitive element uniformly at a voltage of a polarity; an exposure device exposing the charged surface of the photosensitive element, to a lig... | 09/25/2007 |
| 7269363 | Developing apparatus, developing method, and developing agent therefor A developing apparatus is provided in which a replenishment developer when replenished has been electrified to a sufficient extent and can immediately produce an effect of replenishment, with a small consumption of a carrier. In an developing apparatus 100 of... | 09/11/2007 |
| 7263320 | Image forming apparatus, developing apparatus, and finely-divided toner particle collecting apparatus An image forming apparatus for forming an image by developing a latent image formed on an image carrier, using a developer including a toner and a carrier. The image forming apparatus comprises: a developer conveying member that conveys the developer; a first collec... | 08/28/2007 |
| 7260341 | Cleaning patch for an image forming apparatus The present invention discloses a cleaning patch and method thereof for cleaning a residual toner in a developing unit. The cleaning patch is composed of a plurality of cleaning regions. Each cleaning region includes a plurality of cleaning toner point alternately a... | 08/21/2007 |
| 7260347 | Image forming apparatus A developing apparatus having: a first developer carrying member close to a developer regulating member for regulating an amount of developer; a second developer carrying member to which the developer is delivered from the first developer carrying member; and a mode... | 08/21/2007 |
| 7254350 | Image forming apparatus featuring a variable oscillating electric field formed between a developer carrying member and an image bearing member during a developer operation in accordance with a peripheral speed of the image bearing member An image forming apparatus includes an image bearing member; a developer carrying member, disposed opposed to the image bearing member, for carrying a developer, wherein an electric field is formed between the developer carrying member and the image bearing member d... | 08/07/2007 |
| 7241546 | Toner, and image forming method A toner includes toner particles containing at least a binder resin and a colorant, and inorganic fine particles. The shape factor SF-1 of the toner particles is in a specific range. The toner has a storage elastic modulus at 140° C., G′ (140° C.), in a specific... | 07/10/2007 |
| 7239831 | Image forming apparatus when a maximum developing bias voltage |V| max and surface potential Vd of a charged image bearing member satisfy: |V| max≦|Vd| An image forming apparatus includes an image bearing member; a charging device for electrically charging the image bearing member; a rotatable developer carrying member for carrying a developer to develop an electrostatic image formed on the image bearing member wit... | 07/03/2007 |
| 7239827 | Image forming device that prevents reverse transfer and color mixture In a color laser printer, the amount of reversely transferred developing agent on the surface of a developing roller is estimated based on the operating time of the color laser printer, the surface area of an image, and the charging amount of developing agent. When ... | 07/03/2007 |
