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| Number | Title | Issue Date |
| 8005401 | Image forming apparatus including charge removal member An image forming apparatus may be provided with a belt configured to move in the predetermined direction and face a photoreceptor, a charge removal member, and a conductive member. The charge removal member may be configured to remove charge of the belt. The conduct... | 08/23/2011 |
| 7315719 | Transfer charge device cover in non-image receiving medium area An image forming apparatus may include: a photoreceptor and a corona charging device or bias transfer roller that provides a charge to an image receiving medium. A cover may be disposed over a portion of the corona charging device or the bias transfer roller to shie... | 01/01/2008 |
| 7005030 | Printing and laminating apparatus An apparatus includes a printer and a laminator operating in line with said printer, and a feeding device arranged along the media path between the printer and the laminator for feeding to the laminator the media that is outputted from the printer. The feeding devic... | 02/28/2006 |
| 7006244 | Image rendering method and system using negative signals A xerographic marking device includes a source of pixels representative of digitized image information. A rendering image processor analyzes the pixels for an image characteristic, and based on the analysis assigns one of at least three values to each pixel. The thr... | 02/28/2006 |
| 6744995 | Electrophotographic image forming apparatus A high image quality electrophotographic image forming apparatus is provided without increasing the size and cost, and reducing the life thereof. The potential difference (contrast potential) between a photoreceptor and a development roller for supplying toner to th... | 06/01/2004 |
| 6472115 | Image forming apparatus and image forming method An image forming apparatus of the present invention includes a particle conveying body made up of a light-transmitting conductive layer, an insulative'screen provided on the conductive layer and formed with a number of pores, and a screen electrode formed... | 10/29/2002 |
| 6438337 | Image forming apparatus having means for preventing developer passing through cleaning member The present invention provides an image forming apparatus which has an image bearing member developing device for developing an electrostatic latent image formed on the image bearing member with developer, cleaning device for removing residual developer o... | 08/20/2002 |
| 6421514 | Charging device A charging device which has a grid disposed between a discharge element and the photosensitive drum. The grid is formed of a regulating portion having a mesh configuration for the range opposing the image area on the photosensitive drum and non-regulating... | 07/16/2002 |
| 6374073 | Image forming machine An image forming machine comprising image bearing means, charging means, exposure means, reversal development means, transfer means, and cleaning means. The transfer means includes a rotationally driven transfer belt, and transfer voltage applicator means... | 04/16/2002 |
| 6125257 | Methods and systems for cleaning residual toner from image developing device The current methods and systems for cleaning residual ultra-fine spherical toner from an image forming surface discloses the application of aspherical toner to a cleaning blade. The aspherical toner is generally larger than the ultra-fine spherical toner ... | 09/26/2000 |
| 6032006 | Image forming apparatus having an improved cleaning mechanism and method thereof A novel image forming apparatus including a seamless belt-shaped moving member positioned adjacent to an image bearing member. Also included is a bias voltage applying roller positioned at a rear face side of the seamless belt-shaped moving member, and a ... | 02/29/2000 |
| 5991577 | Air breakdown charge and development image forming method and apparatus using image area centered patches of toner A method and apparatus for producing high quality liquid toner images in an electrostatic printing machine. The method using the apparatus includes selectively coat a photoreceptor only in selected image area centered portion of the photoreceptor surface ... | 11/23/1999 |
| 5991578 | Image forming reverse charge printing method and apparatus using image area centered patches of toner An efficient and high quality image forming method and apparatus wherein only selective scattered portions of an imaging surface are charged with a first charging device, and then coated with a layer of charged toner solids by a toner supply apparatus, th... | 11/23/1999 |
| 5970282 | Method of cleaning a surface in an image forming apparatus by feeding toner to the surface In an image forming apparatus of the type including a movable belt and a cleaning blade for cleaning the belt, a toner image on the form of an exclusive line is formed on an image carrier between sheets and the transferred to the belt so as to feed toner ... | 10/19/1999 |
| 5956548 | Image forming apparatus An image forming apparatus includes: a photosensitive unit having a surface portion of negatively charging property and moved in a predetermined direction; a first charging device disposed opposite to the photosensitive unit with a first spacing therebetw... | 09/21/1999 |
| 5883724 | Method and apparatus for processing image data from a plurality of sources and for forming a plurality of images on a photosensitive drum based on the processed image data Since an image processing apparatus of this invention can record images input from a plurality of image sources on a plurality of recording media simultaneously held on a recording medium holding member, the images input from the plurality of image source... | 03/16/1999 |
| 5845172 | Image forming apparatus having rotatable charging brush with varying charging voltage In order to achieve such effects that memories such as image memory due to untransferred residual toner can be sufficiently prevented, and good images can be obtained by suppressing base fogging and reduction of entire image density for a long term, an os... | 12/01/1998 |
| 5812904 | Image forming apparatus and method for controlling charging potential differently between image forming area and non-image forming area of photosensitive drum A system for controlling a potential of a photosensitive drum for a laser beam printer having a photosensitive drum on which an electrostatic image is formed, a charger for applying voltages differentially to an image forming area where the photosensitive... | 09/22/1998 |
| 5805951 | Image forming apparatus detecting useful life of an image bearing member An image forming apparatus for detecting the useful life of an image bearing member includes an image bearing member; a charging member contactable to the image bearing member for charging the image bearing member, the charging member being supplied with ... | 09/08/1998 |
| 5734951 | Image forming apparatus An image forming apparatus in which a toner image formed on an image carrier is transferred onto paper held onto a transfer drum following which the paper is separated from the transfer drum, the image forming apparatus being equipped with a charger that ... | 03/31/1998 |
| 5715499 | Contact charger having an oscillating voltage for charging a photosensitive member An image forming apparatus includes an image bearing member; an image forming device for forming an image on the image bearing member, the image forming device being provided with a charging member which is disposed in contact or proximity with the image ... | 02/03/1998 |
| 5671468 | Charging member and image forming apparatus having contact charging member A charging device includes a movable member to be charged; a charging member contactable to the member to be charged to electrically charge the member to be charged; a discharging device, disposed upstream of a contact portion between the charging member ... | 09/23/1997 |
| 5666597 | Image forming apparatus with delayed discharge by discharge means An image forming apparatus includes an image bearing member for bearing an image, the image bearing member being rotatable at a first speed and a second speed which is different from the first speed, wherein during image formation on the image bearing mem... | 09/09/1997 |
| 5600413 | Method and apparatus for controlling the potential applied to a contact charger in an image forming apparatus An image forming apparatus includes an image bearing member for bearing an image; a charging member contactable to the image bearing member to electrically charge the image bearing member, wherein a toner image is formed on the image bearing member using ... | 02/04/1997 |
| 5579089 | Method and apparatus for reducing transferred background toner In a multi-color imaging apparatus utilizing a recharge step between two image creation steps for conditioning a charge retentive surface pursuant to forming the second of the two images, a corona generating device is used to both charge the toned and unt... | 11/26/1996 |
| 5563688 | Charging device for charging in one of a plurality of predefined image areas on a surface of an imaging member A printing machine adapted to print an image on a plurality of different predefined sized sheets, including an imaging member adapted to receive the image on a plurality of predefined image areas on the surface of the imaging member. A selector is provide... | 10/08/1996 |
| 5436696 | Fibrillated pultruded electronic component for grounding a photoconductor An electronic component for making electrical contact with another component comprising a nonmetallic pultruded composite member having a plurality of small generally circular cross section conductive fibers in a polymer matrix said plurality of fibers be... | 07/25/1995 |
| 5365317 | Charging system for eliminating edgebanding in an electrostatographic printing process A corona generating device of the type in which a control grid adjacent a corona generating electrode regulates the charge deposited onto an imaging surface. The control grid defines elongated apertures located in alignment with the electrode, extending a... | 11/15/1994 |
| 5276490 | Buried electrode drum for an electrophotographic print engine A buried electrode drum (48) includes a rigid core (10) over which a controlled durometer layer (12) is disposed. On the surface of the controlled durometer layer (12) is disposed a buried electrode layer (14), having electrodes (16) disposed therein alon... | 01/04/1994 |
| 5157422 | Solid imaging member with matrix of connected photoelectric conversion devices, providing exposure surface, and charge storage devices, providing opposite surface for latent image formation and developed image transfer In a copying apparatus employing a light source for illuminating an original subject to be copied and forming a toner image corresponding to said original subject on a recording medium, a solid imaging device is employed for converting a reflected light f... | 10/20/1992 |
| 5126792 | Image forming apparatus having erasing means for erasing an electrical charge in a non-image region of an image bearing member The image forming apparatus according to this invention is adapted to erase unnecessary black images otherwise appearing on the peripheral portion of a copy sheet so that output images of a high quality are obtained. Further, erasable peripheral areas of ... | 06/30/1992 |
| 5107285 | Image forming apparatus with improved image retainer cleaning means An image forming apparatus wherein a toner image is formed in a non-image area on an image retainer and a toner is attached to a cleaning blade for cleaning residual toner by cleaning the toner image by the cleaning blade. The toner image is shaped in a s... | 04/21/1992 |
| 5014092 | Image forming apparatus with a binding function An image forming apparatus with a binding function wherein small bands of toner are deposited on paper sheets, a plurality of said sheets are then stacked and thereafter said small bands of deposited toner are fused, thereby binding said sheets. In order ... | 05/07/1991 |
| 4862219 | Copying apparatus There is a multi-color copying apparatus having image processing functions which can easily designate arbitrary areas when the trimming or masking is executed. This apparatus comprises: an area designating device to designate the first area of the origina... | 08/29/1989 |
| 4839695 | Device for controlling charge area of photoreceptor A device for controlling the charge area of a photoreceptor comprising a detector for detecting the length of a sheet of copying paper, another detector for detecting the length of an image projected area of the photoreceptor, a selecting device for selec... | 06/13/1989 |
| 4814834 | Electrophotographic apparatus An electrophotographic apparatus capable of operating both in a mode for obtaining a positive image from a negative original and in a mode for obtaining a positive image from a positive original and capable of constantly controlling the image density in e... | 03/21/1989 |
| 4712905 | Method of preventing the occurrence of blackened margins on photosensitive sheets in electrophotography A method of preventing the occurrence of blackened margins on a photosensitive sheet processed in an electrophotographic apparatus. The method comprises the steps of calculating a first sheet transporting length by which the photosensitive sheet is requir... | 12/15/1987 |
| 4603964 | Photoreceptor charging scorotron A charge scorotron having a U-shaped shield positionable opposite a photoreceptor, a corona discharge wire in the shield, a grid between the wire and the photoreceptor for controlling the emission of ions to the photoreceptor, the grid being electrically ... | 08/05/1986 |
| 4544261 | Charging and exposure section in an electrophotographic apparatus In a charging and exposure section of an electrophotographic apparatus, a charging mask defining a charge area of an electrophotosensitive member charged by a charging unit is formed with a cut-out portion which is not exposed through an objective lens fo... | 10/01/1985 |
| 4469428 | Corona discharging apparatus used in an electrostatic photographic copying machine A corona discharging apparatus used in an electrostatic photographic copying machine includes a shield case provided with an open portion facing a circumferential surface of a sensitive drum. The shield case is detachably and dislocatably provided with a ... | 09/04/1984 |
