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| Number | Title | Issue Date |
| 7395004 | Image forming apparatus featuring first and second toner removing sequence selected on the basis of a toner amount per unit area An image forming apparatus includes an executing portion, which executes a first removing sequence and a second removing sequence when removing a toner image borne on an intermediate transfer member. The first removing sequence passes the toner image through a prima... | 07/01/2008 |
| 7395012 | Position setting method of photosensitive body and image forming apparatus A drum/belt drive starting procedure simultaneous starts the rotation of photosensitive drums and the conveyance of a belt. A drum/belt driving time calculating procedure sets a rotational drive stop time of each photosensitive drum and a conveyance drive stop time ... | 07/01/2008 |
| 7359651 | Image forming apparatus The image forming apparatus includes first and second developing apparatuses for developing electrostatic images on first and second image bearing members, a first developer container containing a developer, first supplying device for supplying the developer in the ... | 04/15/2008 |
| 7333758 | Image forming apparatus An image forming apparatus capable of changing over between black printing and color printing with an intermediate transfer belt being brought into contact with and separated from photoconductors by means of a black transfer member and a three-color-integrated color... | 02/19/2008 |
| 7330674 | Image forming apparatus for preventing resistance variation of intermediate transfer belt and method thereof An image forming apparatus for performing a printing job using an intermediate transfer belt is provided. The image forming apparatus has a voltage determination part for determining a predetermined level of a refresh charge corresponding to a potential difference w... | 02/12/2008 |
| 7298502 | Image forming apparatus An image forming apparatus includes a plurality of image forming stations each having an image carrier and forming an image on the image carrier; a mark detecting unit for detecting a plurality of registration correction marks formed on a recording medium by the plu... | 11/20/2007 |
| 7251055 | Image forming apparatus having a function for correcting color deviation and the like An image forming apparatus using an exposure unit of a solid-scanning type such as an LED head, reads out linear distortion correction data of an LED unit, then, calculates an amount of correcting color deviation based on the read-out data, and after that, carries o... | 07/31/2007 |
| 7245313 | Image forming device An image forming device includes a main frame of the image forming device having a body, a drum shaft which is positioned and supported by the body of the main frame of the image forming device, a photoconductive drum which is provided removably in the main frame of... | 07/17/2007 |
| 7221894 | Image forming apparatus which prevents misregistration To provide an image forming apparatus including a first image bearing member, first toner image forming means which forms a first toner image on the first image bearing member, an intermediate transfer member in which a circumferential face is formed, the circumfere... | 05/22/2007 |
| 7139518 | Image forming apparatus and image forming method with detecting a positional deviation in a main scanning direction In an image forming apparatus that transfers images formed on plural photosensitive drums onto a belt in a superimposing manner to produce a multi-color image, a positional deviation in a main scanning direction, which is generated while transferring the images form... | 11/21/2006 |
| 7130568 | Image forming apparatus which presents faulty image when toner image on image bearing member is transferred to transferring medium In an Image forming apparatus, a light color toner image forming unit that forms a light color toner image on a transfer medium has a first developing device which develops an electrostatic image on a first image bearing member to form the light color toner image on... | 10/31/2006 |
| 7123868 | Electrophotographic printing device having non-grounded electrically conductive layer An electrophotographic printing device including a toner-developer unit, a lighting device, a developer drum, a photoconductor, a transfer unit and an earthed charging device. The substrate to be printed is placed on a transport device and moved along the transfer u... | 10/17/2006 |
| 7038404 | Image forming apparatus An image forming apparatus is provided, which is capable of performing phase control of rotation bodies inexpensively and accurately and is capable of reducing time until completion of phase adjustment at the time of a print operation to prevent first print time fro... | 05/02/2006 |
| 6993276 | Belt apparatus and image forming apparatus having the same A belt apparatus having an endless belt which is wound around and movably driven by a plurality of support rollers. The speed fluctuations of the endless belt due to the variations in thickness of the endless belt are prevented. A driving apparatus for driving the e... | 01/31/2006 |
| 6973284 | Induction heating apparatus having sheet releasing mechanism A fixing apparatus according to the present invention includes a flat coil which is arranged along an inside periphery of a heating roller and is supplied with power for heating the heating roller by means of eddy current. At least two flat coils are provided along ... | 12/06/2005 |
| 6930786 | Image forming apparatus An image forming apparatus includes a plurality of image forming stations each having an image carrier and forming an image on the image carrier; a mark detecting unit for detecting a plurality of registration correction marks formed on a recording medium by the plu... | 08/16/2005 |
| 6905269 | System and method for continuous label printing A system for continuous printing is disclosed. The system includes an unwind storing a roll of print media; a cutter which receives the print media and which cuts the print media into sheets of variable length; a sheet printer which receives the sheets of print medi... | 06/14/2005 |
| 6694119 | Perfecting press apparatus A perfecting press apparatus for forming images on both sides of a transfer medium. With respect to a transferring current Ipt of an image forming unit, current Ipc is made large which flows from a charge control instrument for controlling charge polarity... | 02/17/2004 |
| 6173141 | Apparatus for forming color images by the superimposition of visualized latent images having drive means for simultaneously driving at least a recording medium conveying means and a source of black visualized latent images Photoreceptor drums for forming color images each have a gear as the drive transmission element at their central shafts. Each gear has an idle gear which in turn is coupled with a first motor via a timing belt. The photoreceptor drum for forming black mon... | 01/09/2001 |
| 6142690 | Color image forming apparatus with drive power transmission mechanism An image forming apparatus having a plurality of image bearing members disposed parallel along a conveying direction of recording sheet and a drive power transmission mechanism that translates movement of a drive source to synchronized and uniform movemen... | 11/07/2000 |
| 6021302 | Device for electrostatically transferring color toner images onto an electrically grounded receptor sheet An apparatus for transferring a plurality of toner images having a charge thereon from a photoconductive member to a receptor sheet, the transferring device including a first corona generator for applying a charge to the sheet of polarity opposite to that... | 02/01/2000 |
| 5960241 | Color image forming device and image transfer point deciding method in the same A color image forming device that can suppress the occurrence of a transfer positional shift due to a variation in velocity of the drive system as low as possible even when the distance between image transfer points of each color varies. In the color imag... | 09/28/1999 |
| 5636010 | Image forming apparatus having a plurality of developing means An image forming apparatus has a movable image bearing member, a plurality of developing devices operable for development at different locations along the direction of movement of the image bearing member to develop the image bearing member with toners of... | 06/03/1997 |
| 5600404 | Correction of misregistration in an image forming apparatus depending on multiple regions of a transfer belt Specific pattern images are transferred from respective photoreceptors onto the circumferential surface of a transfer belt. By detecting the specific pattern images with sensors, misregistration amounts on a transfer belt are calculated by a misregistrati... | 02/04/1997 |
| 5594538 | Image forming apparatus having multi-layer transfer material bearing member with different coefficient of kinetic frictions between layers The present invention provides an image forming apparatus comprising an image bearing means for bearing an image, a transfer material bearing member for bearing and conveying a transfer material, and a transfer member for transferring the image on the ima... | 01/14/1997 |
| 5581331 | Color image forming apparatus In a color image forming apparatus, charging, exposure and development are repeated thereby a plurality of color component toner images are formed in superposing on an image carrier and then transferred collectively to an image receptor. As a charging dev... | 12/03/1996 |
| 5532812 | Apparatus for forming a copy of an original image on a sheet of paper An image forming apparatus includes a plurality of image forming units each having a photoconductive drum for forming a latent image and a developing device for developing the latent image, for providing different-color developed images, an exposing devic... | 07/02/1996 |
| 5502554 | Image transferring unit of non-contact type roller method In a transfer unit of a non-contact roller transfer method, both ends of a transfer roller shaft are supported independently of each other so as to be movable upward and downward, and an upward pushing force is provided thereto. A gap maintaining roller p... | 03/26/1996 |
| 5428432 | Electrophotographic recording apparatus having integrated heating and cooling device An electrophotographic recording apparatus in which a thin endless metal belt having a photoconductive photosensitive layer on an outer circumferential surface is provided around a drive roller and an integrated heating and cooling unit, and rotated by th... | 06/27/1995 |
| 5383010 | Color image forming apparatus with transfer sheet shifting compensation means The present invention intends to reduce the deterioration of the image quality due to the color deviation in an image forming apparatus wherein color toner images formed on an image bearing member are successively transferred onto a transfer sheet superim... | 01/17/1995 |
| 5274428 | Single pass direct transfer color printer A high throughput, single pass direct transfer color printer utilizing a roll web based design which simplifies tandem engine architecture by eliminating a very difficult subsystem. Improved image registration is achieved simply by position/velocity synch... | 12/28/1993 |
| 5189479 | Image transferring device for a color image recorder An image transferring device incorporated in a color image recorder has a belt made of a dielectric material and movable while sequentially contacting a plurality of photoconductive elements at successive image transfer positions. Toner images formed on t... | 02/23/1993 |
| 5189477 | Apparatus for the production of a colour image An apparatus for forming a color image by transfer of at least one distinctively colored color image from a corresponding support therefor onto a single carrier support using a transfer cylinder for each color image for receiving on its periphery in a fix... | 02/23/1993 |
| 5187536 | Image forming apparatus An image forming apparatus includes first and second image bearing members; movable carrying member for carrying a transfer material through a first transfer position for electrostatically transferring a first image from the first image bearing member to ... | 02/16/1993 |
| 5177542 | Method of xeroprinting A method of xeroprinting in which a master sheet is secured to a drum to create a drum-sheet unit. The drum-sheet unit is installed in a master-creating apparatus where a xeroprinting master is created on the master sheet. The drum-sheet unit is then remo... | 01/05/1993 |
| 5081507 | Registration apparatus for a printing system An apparatus in which a sheet is advanced into registration with different color information developed on master sheets secured releasably on different drums. Each master sheet is secured to a gripper bar having outwardly extending pins. The pins in the m... | 01/14/1992 |
| 5016062 | Multicolor image forming apparatus having improved registration An apparatus for forming multicolor toner images includes an endless web having rows of perforations along each edge. In one embodiment, two or more drums have sprockets on each end. These sprockets engage the rows of perforations in the web. Toner images... | 05/14/1991 |
| 4994858 | Electrostatographic apparatus for forming multicolor images on a receiving sheet An endless imaging web is supported by a large diameter drum and at least one small diameter roller. First and second electrostatic images are created and toned on the same portion of the web as it is backed by the drum. The toners are of different color ... | 02/19/1991 |
| 4972234 | Endless belt with recess for receiving sheet feeding grippers An apparatus for feeding a printing sheet in a printer, including a gripper feeding belt for carrying grippers which grip a leading end of the printing sheet to feed it along a horizontal sheet feeding path; a plurality of toner printing units used for pr... | 11/20/1990 |
| 4788574 | Multi-color image forming apparatus in which a plurality of toner images are successively transferred onto a printing medium from a plurality of image carriers one above another An image forming apparatus is of the type in which a plurality of toner images are successively transferred onto a printing medium from a plurality of image carriers one above another. A toner image built on each of the image carriers is transferred onto ... | 11/29/1988 |
