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| Number | Title | Issue Date |
| 7826771 | Electrostatic latent image holder unit and image forming apparatus using the same An electrostatic latent image holder unit includes: first and second electrostatic latent image holders that have first and second functional layers, respectively, the first functional layer being different from the second functional layer in component ratio, and ho... | 11/02/2010 |
| 7822365 | Image forming apparatus The present invention relates to an image forming apparatus comprising: a plurality of image forming means; a first image forming means; a second image forming means; a belt member to be transferred with the toner image formed on each image forming means; and a plur... | 10/26/2010 |
| 7343123 | Image forming apparatus having reduced image errors from image bearing bodies and method of manufacturing same An image forming apparatus has a plurality of image bearing bodies in a predetermined sequence, an intermediate transfer medium for running in contact with each of the plurality of image bearing bodies, and a plurality of supporting rollers for driving the intermedi... | 03/11/2008 |
| 7257349 | Image forming apparatus whose image bearing member and developing device are provided in a cartridge dismountably mounted to the apparatus The image forming apparatus includes an image bearing member for forming an electrostatic image, a developing apparatus for developing the electrostatic image on the image bearing member with a developer, a developer container for containing a replenishing developer... | 08/14/2007 |
| 7231165 | Image forming apparatus An image forming apparatus includes: a recording medium supplying device that supplies a recording medium; an image carrier arranged beneath the recording medium supplying device in a gravitation direction; a carrying passage that transports the recording medium sup... | 06/12/2007 |
| 7203452 | Tandem image forming device having a side-by-side arrangement of image forming sections A tandem image forming device for an image forming apparatus of the present invention includes a plurality of image forming means arranged side by side along an intermediate image transfer belt. The image forming means each include a developing device and a cleaning... | 04/10/2007 |
| 7187890 | Ion conductive roller and image forming apparatus employing ion conductive roller An image forming apparatus includes a movable member; a roller contacted to the movable member, the roller having an elastic layer contacted to the movable member, the elastic layer having an ion electroconductivity and having a hardness of not less than 20° and no... | 03/06/2007 |
| 7174125 | Image forming apparatus An image forming apparatus of the invention at least includes: a transport control component for controlling a transporting component so that transporting of the continuous paper is stopped when a print job is finished, the continuous paper is back-transported to an... | 02/06/2007 |
| 7162192 | Transfer belt device and image forming apparatus A transfer belt device includes an endless transfer belt that is tightly stretched by a plurality of rollers and forms a transport path where a recording medium or a developer image is transported facing a monochrome image bearing member and a plurality of color ima... | 01/09/2007 |
| 7136613 | Multicolor image forming apparatus and image making device An image forming apparatus, includes: a plurality of image carriers each carrying a developer image; a primary transfer belt opposed to the plurality of image carriers and configured to carry a multicolor developer image; a secondary transfer unit opposed to the pri... | 11/14/2006 |
| 7061637 | Method and apparatus for image forming capable of effectively collating a stack of single-/double-sided recording sheets in a desired ejection tray An image forming apparatus includes first and second image carrying members, ejection trays, and a sheet transferring mechanism. The first image carrying member carries images in increasing order of corresponding sheet numbers. The second image carrying member carri... | 06/13/2006 |
| 7009629 | Image forming apparatus with optical adjustors An image forming apparatus including a photoreceptor having an image carrying surface, first and second exposing devices to expose the image carrying surface to form first and second latent images, and first and second developing devices to develop the first and sec... | 03/07/2006 |
| 7008740 | Transfer member and manufacturing method thereof, and image forming apparatus using the same The present invention provides a transfer member containing a polyimide resin and carbon black. The carbon black has a pH value of no more than 5 and a volatile component of at least 3.5%, and the content of carbon black is 22 to 30 parts by weight relative to 100 p... | 03/07/2006 |
| 6980757 | Image forming apparatus with beam slots An image forming apparatus including a plurality of light generators, an image transfer mechanism, a plurality of image forming cartridges corresponding to the plurality of light generators, and a housing including slots corresponding to the light generators. Each i... | 12/27/2005 |
| 6938351 | Image forming device An image forming device has plural photoreceptor drums on which a latent image is formed, wherein one of the photoreceptor drum is different diameter from the other photoreceptors. A belt in contact with the plural photoreceptor drums and plural transfer rollers pre... | 09/06/2005 |
| 6934503 | Printer A printer prints on two sides of a sheet of paper having continuous pages, and discharges the paper to a postprocessor for disconnecting the paper in page units and storing the disconnected sheets of paper in a stack. Depending on whether the postprocessor has an in... | 08/23/2005 |
| 6823158 | Tandem style color image forming apparatus In an image forming apparatus in which multiple photoconductors for corresponding developers of different colors are disposed along a transfer belt or paper conveyance belt, the photoconductors are disposed at intervals that are each an integer multiple of the outer... | 11/23/2004 |
| 6768886 | Image forming apparatus A method of forming an image, including emitting a plurality of light beams from a plurality of vertically arranged light emitting devices; passing the plurality of light beams through corresponding slots of a vertical stay; receiving the plurality of light beams wh... | 07/27/2004 |
| 6201944 | Tandem-type image forming apparatus operating in color mode and monochrome mode The recording sheet supporting surface of the transport belt comes in contact with the photosensitive drums for cyan, magenta, yellow, and black in the color copy mode, and is separated from the photosensitive drums aside from the photosensitive drum used... | 03/13/2001 |
| 6154628 | Image forming device with misregistration correction achieved by photo-conductor speed controlled variation of latent image tilt As the speed of a photoconductor drum 1a can be independently varied by providing a rotational speed adjustment mechanism to the photoconductor drum 1a, an inclined angle in a diagonal direction can be varied and as a result, misregistration can be adjust... | 11/28/2000 |
| 6041205 | Image processing apparatus for laying out plurality of images in conformity with image orientation A copier includes a reader for reading a document image, an orientation sensor for sensing orientation of characters in the document image that has entered from the reader, a size sensor for sensing the size of the document image that has entered from the... | 03/21/2000 |
| 5933184 | Color image forming device A color image forming device that can certainly correct uniform velocity error associated with the characteristic of each optical system and can realize high-quality color image printing by performing a fine laser beam irradiating position control, in con... | 08/03/1999 |
| 5837408 | Xerocolography tandem architectures for high speed color printing Full process color imaging is provided with the use of two xerocolography engines in tandem. Each of the two xerocolography engines is capable of creating three perfectly registered latent images with subsequent development thereof in a spot next to spot ... | 11/17/1998 |
| 5278589 | Single pass color printer A single pass tandem color printer is disclosed which utilizes a plurality of Raster Output Scan (ROS) systems mounted within a common housing. The ROS systems produce a plurality of scanning beams which emerge from the housing along parallel paths. Each ... | 01/11/1994 |
| 5278587 | Method and apparatus for image registration The present invention is directed to a precise method of registering plurality of imaging stations, so as to form sequential images on a photoreceptor belt in a single pass. A belt hole is formed in the photoreceptor belt, outside the image area, but with... | 01/11/1994 |
| 5014094 | Process unit and a multi-color image forming apparatus using the same A color image forming apparatus that can detachably receive a plurality of process units into associated ones of a plurality of color image forming stations. Each of such detachable process units effects imaging in one of a plurality of different colors. ... | 05/07/1991 |
| 4908287 | Image forming method and apparatus therefor An image forming method wherein a latent image is formed by one of plurality of latent image forming devices and developed by one of plurality of developing devices. The above steps are repeated to form an image. An image forming apparatus having a first ... | 03/13/1990 |
| 4746950 | Color copier A color copier scans an original carrying a multi-color image in one direction to form toner images of different color components thereof on respective photosensitive drums while moving a transfer sheet in the opposite direction to transfer in registratio... | 05/24/1988 |
| 4742371 | Optical system for color copier An optical system for a color copier in which light images of blue, green and red produced by color separation are formed one on each of three photoconductive elements, then developed by toner of associated colors, and then transferred one upon another on... | 05/03/1988 |
| 4690542 | Color copying apparatus In a color copying apparatus including a plurality of photosensitive members and a mounting table driven by a pulley, in which an original mounted on the mounting table is illuminated to expose the respective photosensitive members with reflected light fr... | 09/01/1987 |
| 4664501 | Method of and apparatus for producing duplicates in color A method of and an apparatus for producing duplicates of a document in color wherein a plurality of photosensitive members in drum form are rotated in the same direction and exposed to respective color-separated optical images of the document through resp... | 05/12/1987 |
| 4660077 | Color image forming apparatus A color image recording apparatus records color images on a recording medium and includes a plurality of image forming media and respective devices for forming respective images each of a different color on each of the image forming media. Transfer appara... | 04/21/1987 |
| 4610529 | Apparatus for recording color images An apparatus for recording color images of an original in color including three photosensitive drums capable of rotating in the normal direction and in the reverse direction. Each photosensitive drum has an outer peripheral surface of an area and an axial... | 09/09/1986 |
| 4587536 | Image recording apparatus with color detection An image recording apparatus with plural recording units each for recording in a different color, includes corresponding color detecting units for identifying the colors of the information to be recorded by each recording unit, thus effectively controllin... | 05/06/1986 |
| 4577954 | Two-color copying apparatus A two-color copying apparatus has a half reflecting mirror located posterior to an image forming lens in the path of a light beam for splitting a light beam reflected by an original in black and a chromatic color for development of corresponding latent im... | 03/25/1986 |
| 4540992 | Thermal color transfer system A multicolored thermal transfer copying system needs an ink film having more than three colors successively. The accurate copying is performed by driving the plural platens via one metal roller, when plural thermal heads are used for transferring each col... | 09/10/1985 |
| 4428662 | Color reproduction apparatus An apparatus in which latent image charge patterns on image-receiving members, corresponding respectively to related primary color separation images of multicolor input information, are developed with pigmented marking particles to form transferable image... | 01/31/1984 |
| 4371253 | Color electrophotographic copier A simplified optical arrangement for an electrophotographic copier for making multicolor reproductions of a multicolor original document. The copier includes at least one charged photoconductive member which is exposed by primary color separation images o... | 02/01/1983 |
| 4239370 | Electrophotocopying machine for production of colored photocopies Electrophotocopying machine in which colored photocopies are produced by successive production and transfer onto copy paper of different color component portions of an original document, and the exposure mechanism for production of each colored component ... | 12/16/1980 |
| 4232961 | Image formation apparatus An image formation apparatus comprises a photosensitive medium, elements for forming an electrostatic latent image on the photosensitive medium, a developing device for developing the electrostatic latent image with the aid of toner, an intermediate trans... | 11/11/1980 |
