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| Number | Title | Issue Date |
| 7603058 | Image formation apparatus with residue toner charging section with nonwoven fabric An image formation apparatus which includes a rotating image-bearing body, a charging section, an exposure section, a developing section, a transfer section, and a residue toner-charging section. The charging section charges the image-bearing body. The exposure sect... | 10/13/2009 |
| 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 |
| 7383003 | Developing apparatus for preventing ghost images and uneven image density A developing apparatus includes a developing roller for developing an image with a developer; a non-rotary magnet roll inside the roller; a blade; and an abutting member abutting against the roller, wherein the following expressions are satisfied: |Vs|>|Vdev|, |Br|/... | 06/03/2008 |
| 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 |
| 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 |
| 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 |
| 7308214 | Image forming apparatus including units for recovering developing agent adhering to developing agent carriers An image forming apparatus includes: a plurality of development units having developing-agent carriers which are provided in correspondence to three or more developing agents, and developing electrostatic latent images on surfaces of image carriers to form developin... | 12/11/2007 |
| 7295796 | Image forming apparatus having a temporary toner holding device and a toner collecting device A cleaningless image forming apparatus of the present invention uses spherical toner grains on surfaces of which a charge control agent and/or organic fine grains are present, thereby enhancing efficient image transfer. A brush roller collects, among toner grains le... | 11/13/2007 |
| 7286777 | Image forming device with cleaning sequence process for returning toner adhered on transfer roller back to photoconductive drum An image forming device includes an image forming unit that includes an image carrier which carries an electrostatic latent image, a developing unit which forms a developing nip by contacting with the image carrier and develops the latent image by using toner, a tra... | 10/23/2007 |
| 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 |
| 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 |
| 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 |
| 7228088 | Color image forming apparatus and color image forming method In an image forming apparatus of the present invention capable of forming a full-color image by superposing a black toner image formed by a black image forming unit using a developing and simultaneous cleaning type developing unit over color toner images obtained by... | 06/05/2007 |
| 7110699 | Image forming apparatus and process cartridge for use in the same An image forming apparatus of the present invention includes a sheet affixed at one edge portion and including a flat surface in the other edge portion. The flat surface is formed with a plurality of grooves each extending over the image forming range of a photocond... | 09/19/2006 |
| 7092649 | Charging device and image forming apparatus provided therewith An image forming apparatus has a charging member opposed to an outer circumferential surface of a rotating object to be charged. The image forming apparatus has a voltage applying section for applying a pulsating voltage Vsp between the charging member and the objec... | 08/15/2006 |
| 7031641 | Image-forming apparatus having pre-charge exposure device for image carrier An image-forming apparatus includes a pre-charge exposure device which removes electric charge from a photoconductor drum to increase a potential contrast between the surface of the photoconductor drum and the surface of a charge roller in an upstream region of a ni... | 04/18/2006 |
| 6996355 | Image formation apparatus having charging means and developing agent charging means An image formation apparatus has developing agent charging device situated downstream in the direction of motion of a photosensitive drum from a transfer roller and upstream from a charging roller, for charging residual developing agent remaining on the photosensiti... | 02/07/2006 |
| 6975342 | Print cartridge A print cartridge according to a particular embodiment of the invention includes a housing and a seal disposed within the housing. The seal includes a longitudinal section having a first end and a second end, a first lateral section connected to and extending from t... | 12/13/2005 |
| 6968149 | Image forming apparatus and method of cleaning the same There is provided a simply structured, cleanerless image forming apparatus capable of suppressing occurrence of filming without significant remodeling. An image forming apparatus 100 according to the present invention comprises a plurality of image for... | 11/22/2005 |
| 6965743 | Developing apparatus A developer apparatus includes a developer carrying member, for carrying a developer to a developing portion, the developer carrying member including an electroconductive base and a resistance layer provided thereon; a developer feeding member for being supplied wit... | 11/15/2005 |
| 6963709 | Charging apparatus having auxiliary charger rubbing against image bearing member A charging apparatus has a movable image bearing member, a first charging member for charging the image bearing member, and a second charging member provided upstream of the first charging member with respect to the direction of movement of the image bearing member,... | 11/08/2005 |
| 6952546 | Image forming apparatus adopting image bearing member cleaner-less system A image forming apparatus includes an image bearing member to be moved rotationally, charging means for electrically charging the image bearing member and toner remaining on the image bearing member, electrostatic latent image forming means for forming an electrosta... | 10/04/2005 |
| 6944416 | Image forming apparatus A cleaner-less image forming apparatus serves to prevent excessive expellation of toner from a photosensitive drum at the time of application of a bias voltage. A developer charging member for charging residual toner on the photosensitive drum is disposed in contact... | 09/13/2005 |
| 6907211 | Image forming apparatus An image forming apparatus is provided, which includes: an image bearing member, a charging member for charging the image bearing member, the charging member bearing electrically conductive particles that contact the image bearing member, and a developer carrying me... | 06/14/2005 |
| 6879793 | Method for forming image To provide a method for forming images in which the image bearing member and the toner carrying member are arranged with a gap of 100 μm to 250 μm, and the equation (1) and equation (2) are satisfied. (1) 22≦(the frequency of the alternating current component of... | 04/12/2005 |
| 6810223 | Developing apparatus and method in image forming apparatus A method of forming an image in a developing apparatus of an image forming apparatus and an image forming apparatus including a retrieving/auxiliary developing roller being in contact with the circumference of the photosensitive drum to retrieve or collect toner rem... | 10/26/2004 |
| 6807384 | Image forming apparatus To provide an image forming apparatus improving discharging of a developer from charge providing member for providing charge to the developer remaining on an image bearing member to the image bearing member, the developer is charged from the charge providing member ... | 10/19/2004 |
| 6778791 | Image forming apparatus having charging rotatable member An image forming apparatus includes a rotatable image bearing member; a charging rotatable member, contactable to the image bearing member at a contact position, for electrically charging the image bearing member, the charging rotatable member being rotatable for co... | 08/17/2004 |
| 6744994 | Image forming apparatus with environmentally-controlled first and second charging members An image forming apparatus includes an image bearing member, a first charging member for charging a residual developer on the image bearing member, a second charging member for charging the residual developer, an environmental condition detector, and a controller. T... | 06/01/2004 |
| 6721522 | PROCESS CARTRIDGE DETACHABLY MOUNTABLE TO A MAIN ASSEMBLY OF AN IMAGE FORMING APPARATUS COMPRISING TRANSFERRING MEANS FOR TRANSFERRING A COLOR DEVELOPER IMAGE ONTO THE IMAGE RECEIVING MATERIAL AND SUCH AN IMAGE FORMING APPARATUS An image forming apparatus includes a transferring device for transferring, after a first color developer image is transferred onto an image receiving material in a first image forming station, a second color developer image onto the image receiving material in a se... | 04/13/2004 |
| 6654579 | Image forming apparatus including diamond-like or amorphous structure containing hydrogen surface protection layer An image forming apparatus including an image carrier including a conductive support, at least a photoconductive layer formed on the conductive support, and a surface protection layer formed on the photoconductive layer and including a charge injection la... | 11/25/2003 |
| 6647225 | Charging device for frictionally-charging an image bearing member and image forming apparatus including same A charging device includes a charging rotary member provided in contact with an image bearing member capable of bearing a toner for charging the image bearing member, in which a peripheral speed of the charging rotary member is different from a peripheral... | 11/11/2003 |
| 6640071 | Cleaner-less type image forming machine A cleaner-less type image forming machine for removing the toner accumulated in the memory removing brush, and improving the quality of the image forming onto the recording medium is provided. The image forming machine includes a photoconductive drum, a c... | 10/28/2003 |
| 6636715 | Photosensitive member and image forming apparatus having the same To provide an amorphous Si photosensitive member and an image forming apparatus which form favorable images by preventing toner adhesion at a cleaning time. A photoconductive layer 102 containing amorphous Si is formed on an electrically conductive substr... | 10/21/2003 |
| 6611668 | Image forming apparatus with residual developing charging feature In order not to expel toner excessively when bias is applied, a cleanerless image forming apparatus includes a first developer charge amount controlling device 7, provided on a downstream side of a transfer device 5 in a moving direction of an image beari... | 08/26/2003 |
| 6603935 | Image forming apparatus featuring application of superimposed DC and AC voltages and DC voltage An image forming apparatus includes an image bearing member, a flexible changing member and a developing device. When a first area to be an image forming area of the image bearing member, is present in a nip portion, a superimposed voltage resulting from ... | 08/05/2003 |
| 6603941 | Image forming apparatus including first and second charge-applying devices disposed between developer transfer and charging positions on an image bearing body An image forming apparatus includes an image bearing body, a charging device for charging the image bearing body, a developing device for forming a developer image by developing an electrostatic image formed on the image bearing body, a transferring devic... | 08/05/2003 |
| 6560426 | Image forming apparatus An image forming apparatus includes an image bearing member; an electrostatic image forming unit for forming an electrostatic image on said image bearing member, the electrostatic image forming unit including a flexible charge member for electrically char... | 05/06/2003 |
| 6539190 | Process cartridge and image forming apparatus comprising charging means including a charge member and electroconductive particles An image forming apparatus includes a movable image bearing member, a charger means including a charge member for electrically charging the image bearing member with electroconductive particles between the charge member and the image bearing member and a ... | 03/25/2003 |
| 6519433 | Image forming apparatus in which electroconductive particles are supplied to charging means from developing device by way of image bearing member An image forming apparatus includes an image bearing member; charging means for electrically charging the image bearing member, the charging means carrying electroconductive particles and having a charging member elastially press-contacted to the image be... | 02/11/2003 |
