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| Number | Title | Issue Date |
| 8023874 | Image forming apparatus having transfer bias applying section and image forming method having the same for transferring toner image The present invention teaches and claims an image forming apparatus comprising an image forming portion using a liquid developer having a carrier liquid and toner; an intermediate transfer section which has an endless belt and a plurality of rotating bodies; a secon... | 09/20/2011 |
| 7418218 | Conductive backer brush for electrostatic brush cleaning of a belt without a ground layer A transfer cleaning station for an electrostatic marking system is provided. In this station, the upper surface of a movable transfer belt is cleaned by a rotating electrostatic cleaning brush (ESB). To improve cleaning performance and conserve space, a grounded con... | 08/26/2008 |
| 7379694 | Belt transfer apparatus and image forming device A combined resistance R1=Vt1/I1 (MO) of a transfer belt (61) and a recording sheet obtained when a transfer current I1 (μA) passes through the transfer belt (61) and the recording sheet upon application of a first transfer ... | 05/27/2008 |
| 7333761 | Transfer media transport guide mechanism for image forming device An image forming device is disclosed that can control image blurring, image contraction, and the like when resilient transfer media such as cardboard is to be transported upward from a pair of resist rollers and guided to a transfer position, and obtain a suitable t... | 02/19/2008 |
| 7320363 | Energized slip ring assembly A slip ring assembly including a slip ring and an electrical contact assembly. The slip ring defines a circumference and an electrical contact groove extending around the circumference of the slip ring. The electrical contact assembly preferably includes a plurality... | 01/22/2008 |
| 7314129 | Image forming apparatus The image forming apparatus includes two tension rollers; a conveyor belt movably supported at the two tension rollers; a plurality of transfer parts that are arranged on the back surface side of the conveyor belt and between the two tension rollers, that contact on... | 01/01/2008 |
| 7302217 | Image forming apparatus and transfer apparatus employing endless belt Transfer roller(s) is/are such that either end thereof is formed from fibrous electrically conductive component(s) and such that cylindrical portion(s) in central region(s) is/are, for example, formed from metal roller-like structure(s), either fibrous electrically ... | 11/27/2007 |
| 7283776 | Image forming apparatus The image forming apparatus includes a fixing device for heat fixing a toner image on a recording material, a discharge device for discharging the recording material on which the toner image is fixed by the fixing device; a blowing device for blowing air onto a lowe... | 10/16/2007 |
| 7280775 | Image-forming apparatus and recording-medium-temperature detector unit used in the same An image-forming apparatus includes a movable lever which functions as a recording medium detector for detecting the passage of a recording medium and a temperature detecting portion provided on the movable lever. The temperature of the recording medium is detected ... | 10/09/2007 |
| 7277651 | Image forming apparatus and control method with power controlled in accordance with remaining amount of rechargeable battery power There are provided an image forming apparatus which can implement on-demand fusing with quick rise in temperature by using the upper current (power) limit of a commercial power supply more effectively and a control method for the apparatus. This image forming appara... | 10/02/2007 |
| 7269366 | Method and apparatus for controlling a fixer of a printer A method and apparatus are provided for controlling a fixing condition of a printer according to the size and type of paper to be printed in order to improve print quality. The apparatus and method include setting a fixing condition according to a selected paper pro... | 09/11/2007 |
| 7260337 | Image forming apparatus with control of commercial and battery power supplies to fusing device There are provided an image forming apparatus which can implement on-demand fusing with quick rise in temperature by using the upper current (power) limit of a commercial power supply more effectively and a control method for the apparatus. The image forming apparat... | 08/21/2007 |
| 7257341 | Image forming apparatus with power supply control for fusing control circuit There is provided an image forming apparatus which can implement on-demand fusing with quick rise in temperature by using the upper current (power) limit of a commercial power supply more effectively. This image forming apparatus includes a rechargeable battery devi... | 08/14/2007 |
| 7254353 | Image forming apparatus and method of controlling commercial power supply to fusing means There are provided an image forming apparatus which can implement on-demand fusing with quick rise in temperature by using the upper current (power) limit of a commercial power supply more effectively and a control method for the apparatus. This image forming appara... | 08/07/2007 |
| 7236731 | Image forming apparatus for a color laser printer for transferring a higher transfer efficiency on a recording sheet on the upstream side of the imaging forming process An image forming apparatus includes developing devices, each of which contains a developing agent of a single color therein; a photosensitive member; a latent image forming device that forms a latent image on the photosensitive member, the latent image being develop... | 06/26/2007 |
| 7233750 | Image forming apparatus with control of transfer charge An electrostatic latent image transferring apparatus applies a transferring bias to a transfer member in a transferring portion, wherein a transferring bias value is determined on the basis of a first detection result detected when the surface of the image bearing m... | 06/19/2007 |
| 7233755 | Image forming apparatus An image forming apparatus which reduces abrasion of a photosensitive drum caused by a rotary brush such as an charging brush for electrically charging the surface of a photosensitive drum or a cleaning brush for cleaning the surface of a photosensitive drum. The ro... | 06/19/2007 |
| 7221883 | Electrostatic image transfer device using intermediate transfer belt having simplified image transfer voltage requirements A transfer device has a control circuit. The control circuit initiates supplying transfer power to one or more first transfer rollers and to a second transfer roller when a first transfer operation is initiated by a first transfer roller positioned most upstream wit... | 05/22/2007 |
| 7177562 | Transfer power supply apparatus of an image forming machine An apparatus for applying a voltage across an image carrying member carrying a toner image and a print medium, the toner image being transferred from the image carrying member to the print medium during an image transfer process. The apparatus includes a first volta... | 02/13/2007 |
| 7158746 | Xerographic printer having a semiresistive rotatable brush in the transfer zone An electrostatographic printing apparatus comprises a charge receptor, and a brush forming a nip against a portion of the charge receptor. The nip is suitable for passing a sheet therethrough. The brush comprises fibers, each fiber being semi-resistive. ... | 01/02/2007 |
| 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 |
| 7110685 | Transfer power supply apparatus of an image forming machine A transfer power supply apparatus of an image forming machine which can maintain a predetermined degree of the quality of an image on a print medium even when the temperature of the surrounding environment varies. The image forming machine includes a voltage computa... | 09/19/2006 |
| 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 |
| 7003238 | Intermediate image transfer device for a color image forming apparatus An intermediate image transfer type of image forming apparatus of the present invention includes an image carrier, an intermediate image transfer body, primary image transferring means for transferring a toner image from the image carrier to the intermediate image t... | 02/21/2006 |
| 6996350 | Image forming apparatus An image forming apparatus including an image bearing body bearing an image, a transferring member being capable of contacting the image bearing body and transferring an image on the image bearing body to a transferring material when a voltage is applied thereto, an... | 02/07/2006 |
| 6990309 | Method and apparatus for image forming performing improved cleaning and discharging operation on image forming associated members An image forming apparatus includes an image carrying member, an intermediate transfer member, a charging member, a transfer mechanism, a discharging member, a direct current voltage source, and a direct current voltage controller. The intermediate transfer member i... | 01/24/2006 |
| 6970676 | Imaging forming apparatus The first invention is characterized that, in a transfer device of an image forming apparatus, charge removing cloth (27) is integrally attached to an attraction plate (26) for separating a transfer medium after transfer. The second invention is charac... | 11/29/2005 |
| 6963701 | Image forming device with bias applying power source for transfer roller An image forming device includes a powere source with a forward transfer bias circuit for applying a forward transfer bias to the transfer roller based on a detected resistance Z, during image transfer, and a reverse transfer bias circuit for applying a reverse bias... | 11/08/2005 |
| 6952552 | Image forming apparatus and method that applies different voltages to pressing members In a transfer unit of an image forming apparatus, an auxiliary transfer roller and a main transfer roller are provided relative to a photosensitive drum, with a transfer belt interposed. A low voltage for avoiding occurrence of a high electric field is applied to th... | 10/04/2005 |
| 6952539 | Image forming apparatus In an image forming apparatus having an image forming portion for forming an image on an image bearing member, a transferring portion provided with a transferring member capable of contacting with the image bearing member and a voltage applying portion for applying ... | 10/04/2005 |
| 6937840 | Paper guide and electrophotographic forming apparatus having the same A paper guide which does not make stripes on an image on a printing paper. The paper guide of an electrophotographic image forming apparatus includes a guiding member for guiding the printing paper into a fusing unit, a plurality of guiding ribs formed on the guidin... | 08/30/2005 |
| 6915088 | Image forming apparatus An image forming apparatus including a movable image bearing member, a charging member disposed opposed to the image bearing member, a transfer member for transferring a toner image from the image bearing member onto a recording material, and potential control means... | 07/05/2005 |
| 6862422 | Image forming apparatus and image forming method having pressing members for pressing a belt-like member In a transfer unit of an image forming apparatus, an auxiliary transfer roller and a main transfer roller are provided relative to a photosensitive drum, with a transfer belt interposed. A low voltage for avoiding occurrence of a high electric field is applied to th... | 03/01/2005 |
| 6859630 | Image transferring and recording medium conveying device and image forming apparatus including the same An image transferring and recording medium conveying device, for an image forming apparatus, which includes a nip between a belt and an image carrier for image transfer to a recording medium. A bias applying device applies a bias for image transfer to the nip. An im... | 02/22/2005 |
| 6842594 | Intermittent DC bias charge roll AC cleaning cycle An apparatus for applying an electrical charge to a charge retentive surface, wherein a bias charge roll member is situated proximately to a surface to be charged such as, a photoreceptor. The bias contact roll member is supplied with an electrical bias including an... | 01/11/2005 |
| 6782227 | Transfer device for setting a suitable recording medium adsorbing bias, and an image-forming apparatus including the transfer device A transfer device that transfers color visual images of different colors from image carriers to each of first and second sides of a recording medium. The transfer device includes a transfer element that holds and moves the recording medium, transfer bias applying de... | 08/24/2004 |
| 6775507 | Non-fixing type image receiving sheet, image forming method and image forming apparatus A non-fixing type image receiving sheet to which toner particles are made adhere in a removable manner and an image forming apparatus. The image receiving sheet has a large number of concave portions accepting toner particles and a large number of convex portions pr... | 08/10/2004 |
| 6650861 | Electrophotographic image forming apparatus A bias applied to a transfer roller is subjected to the constant-current control when the resistances of the transfer roller and a sheet are high. Thereby, a sufficient amount of current is supplied to the sheet and the toner on a photosensitive drum is r... | 11/18/2003 |
| 6618571 | Process and device for transferring toner Toner material is transferred from a locally charged imaging member to a printed material with a d.c. voltage applied onto an a.c. voltage having voltage peaks in the range of 6-8 kV with a duration of 0.5-1.5 μsec combined with it.... | 09/09/2003 |
| 6564020 | Image forming apparatus An image forming apparatus includes an image bearing member for bearing an image; a movable recording material carrying member for electrostatically carrying the recording material; transfer means for electrostatically transferring the image from the imag... | 05/13/2003 |
