Patents Assigned to Xerox
  • Patent number: 5563591
    Abstract: A programmable encoder having an addressable display device to display an encoder pattern of fiducial marks. The programmable encoder can be programmed to display an encoder pattern on a liquid crystal display. A sensor senses the marks on the pattern and generates sensor signals indicative of the sensed pattern. A controller connected to the sensor receives the sensor signals and outputs control signals which control the movement of a machine, such as an ink jet printer. The programmable encoder can be programmed to display any number of patterns on the addressable display device, and consequently, is highly adaptable to any number of applications requiring position, speed, or acceleration control.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: October 8, 1996
    Assignee: Xerox Corporation
    Inventors: Kurt L. Jacobs, Hugh L. Fuller, Frederick A. Donahue
  • Patent number: 5561787
    Abstract: A system simulator including a plurality of nodes or processor boards for controlling the operation of the interactive sub-systems. The simulator includes a user interface having a screen providing a display of node selections for pre-selecting a given subset of the plurality of nodes, a memory for retaining the node selections for use in operating the machine, a control for simulating operation of the given subset of plurality of nodes, and for operating the remaining nodes to control at least a portion of the interactive sub-systems. The simulator can be integral with the reproduction machine or a stand alone device.
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: October 1, 1996
    Assignee: Xerox Corporation
    Inventors: Rui Amorim, Robert V. Brunner, Eugene S. Evanitsky, Joseph L. Filion, Gregory C. Sosinski
  • Patent number: 5561777
    Abstract: A process of loading an image in the form of a bit map into a memory which can transfer data words in burst mode in either row or column direction. First, the memory is divided into two sections with odd words stored in one section, even in the other, which allows ping pong buffers to be reading one word from memory while the next is being accessed. Also, the page height is set to be an odd number of words. Therefore, when the entire page is read in or out, successive words in either the row or column direction will always be alternately odd and even. If a partial image is read into the memory, this odd and even relationship will also hold. If an image with an even number of rows is read in, in order to preserve the sequential odd-even sequence, in every other column of the original data successive words are swapped so that the word order becomes 1, 0, 3, 2, etc. Then the addresses are also generated in staggered order, so that the words go into the correct location in memory.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: October 1, 1996
    Assignee: Xerox Corporation
    Inventors: Jean-Swey Kao, Jack C. Liu, Ronald E. Rider
  • Patent number: 5561013
    Abstract: An imaging process which comprises (1) charging an imaging member in an imaging apparatus; (2) creating on the member a latent image comprising areas of high, intermediate, and low potential; (3) developing the low areas of potential with a first developer comprising carrier particles and a first negatively charged toner comprised of resin, the magenta pigment 2,9-dimethyl quinacridone, a charge additive, or a mixture of charge additives, and surface additives; (4) developing the high areas of potential with a second developer comprising carrier particles and a second black toner comprised of resin, pigment, and a charge enhancing additive that enables a positively charged toner; (5) transferring the resulting developed image to a substrate; and (6) fixing the image thereto.
    Type: Grant
    Filed: September 15, 1995
    Date of Patent: October 1, 1996
    Assignee: Xerox Corporation
    Inventors: Katherine N. O'Brien, Janet L. Castano, Donald Riley, Charles D. Zimmer, Mark D. Ballou, Jane M. Kanehl, Sandra J. Hutkowski, Patricia J. Donaldson, Raymond L. Sommers
  • Patent number: 5561513
    Abstract: An apparatus for efficient detoning of a cleaner brush by rotating the brush and the moving detoning surface in the "with" mode direction through the detoning nip. The "with" mode of detoning prevents compression of the fibers through the detoning nip which shields the toner from detoning electric field in the detoning nip. The "with" mode opens up the initially compressed fibers such that detoning occurs through the detoning nip where maximum detoning can occur.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 1, 1996
    Assignee: Xerox Corporation
    Inventor: Nero R. Lindblad
  • Patent number: 5561455
    Abstract: In a color image forming apparatus, a screen of each of electrostatic latent images to be formed by an exposing device has a parallel lines structure, and phases of the electrostatic latent images each having the parallel lines structure for at least two different colors are made different from each other. Accordingly, the color image forming apparatus can totally solve the problem caused by the rise in potential of exposed portions by toner charges and the dielectric property of toner layers and the problem caused by the toner shielding effect to thereby allow faithful reproduction of a highlight area important for a good halftone image, especially a high-quality color image.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: October 1, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Toru Teshigawara, Haruyuki Nanba, Toshiaki Sagara, Yasuki Yamauchi, Takuto Tanaka
  • Patent number: 5561025
    Abstract: A process for the preparation of polymer latex particles which comprises the emulsion polymerization of a mixture of monomer, polar comonomer, water, surfactant, initiator, and a water phase termination agent, and wherein the water phase termination agent is selected from the group consisting of butanethiol, pentanethiol, hexanethiol, heptanethiol, octanethiol, and carbon tetrabromide (CBr.sub.4).
    Type: Grant
    Filed: July 3, 1995
    Date of Patent: October 1, 1996
    Assignee: Xerox Corporation
    Inventors: Francisco E. Torres, Raj D. Patel, Michael A. Hopper, Grazyna E. Kmiecik-Lawrynowicz
  • Patent number: 5560957
    Abstract: An electroluminescent (EL) device has a ceramic electroluminescent active layer and may be prepared by forming layers by a sol-gel process.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: October 1, 1996
    Assignee: Xerox Corporation
    Inventor: Gordon E. Johnson
  • Patent number: 5561505
    Abstract: An apparatus for applying an electrical charge to a charge retentive surface by transporting ions through an ionically conductive liquid and transferring the ions to the member to be charged across the liquid/charge retentive surface interface. The ionically conductive liquid is contacted with the charge retentive surface for depositing ions onto the charge retentive surface via a wetted donor blade supported within a mechanically sealable housing adapted to permit movement of the wetted donor blade from an operative position in contact with the charge retentive surface, to a nonoperative position stored within the housing to prevent loss of the ionically conductive liquid in its liquid or vapor form so as to extend the functional life of the apparatus. In one specific embodiment, a wiper blade may be provided for removing any liquid droplets from the surface of the photoreceptor as may have been transferred at the donor blade/charge retentive surface interface.
    Type: Grant
    Filed: November 1, 1995
    Date of Patent: October 1, 1996
    Assignee: Xerox Corporation
    Inventor: Richard B. Lewis
  • Patent number: 5560766
    Abstract: An ink jet composition contains an acid dye or reactive dye and a direct dye.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 1, 1996
    Assignee: Xerox Corporation
    Inventor: Kurt B. Gundlach
  • Patent number: 5561811
    Abstract: A multi-user multi-device system enables a plurality of users to control a single screen. Each user has one or more input devices, which can be used to control one or more stored applications. At any time, the system produces a consistent view of all applications on the single screen. The input from each user produces a response customized to the preferences of that user. Each user can inform the system of which devices that user is using. Inputs to the system initiate the building of Event Records that are queued and then directed to specific applications. The screen is updated, and the coordinates of child applications are determined, only during pauses in the operations of all applications.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: October 1, 1996
    Assignee: Xerox Corporation
    Inventor: Eric A. Bier
  • Patent number: 5560313
    Abstract: A shock mounting assembly for attaching a copier/printer to shock mounts aboard a vessel. The assembly includes two steel supporting members attached to the base of the copier/printer that are easily and quickly screwed into two nonparallel shock mount frames with four jack screws to raise the copier/printer off its casters and restrain it in a fixed position. The four jack screws make detachment from the shock mount assembly a simple and time efficient process for repairmen.
    Type: Grant
    Filed: October 2, 1995
    Date of Patent: October 1, 1996
    Assignee: Xerox Corporation
    Inventors: Charles R. Brewer, III, Douglas W. Gates
  • Patent number: 5559627
    Abstract: A passive facet tracking system using passive optical components to induce a beam of light to track a facet of a rotating mirror polygon. The properties of the passive components are such that they collimate a light beam in a tangential plane in a complete trip through the passive optical components and the passive optical components focus the beam in the sagittal plane so that the beam is collimated in the tangential plane and focussed in the sagittal plane when it arrives at the center of the facet.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: September 24, 1996
    Assignee: Xerox Corporation
    Inventors: Ellis D. Harris, Jean-Michel Guerin, James M. Wilson
  • Patent number: 5559606
    Abstract: An electronic image processing apparatus has a controller and a plurality of resources in an arbitrary configuration. Each of the resources includes an associated processor storing data related to operational constraints of the associated resource and a bus interconnects the processors to the controller for directing the operation of the resources. The controller is adapted to operate independent of a particular configuration of the plurality of resources by receiving from each of the processors the data related to the operational constraints of each associated resource and interrogating each of the processors to determine the geometrical relationship of the interconnection of the resources.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: September 24, 1996
    Assignee: Xerox Corporation
    Inventors: Marc W. Webster, Paul A. Rulli, Michael E. Farrell, Gene A. McDaniel
  • Patent number: 5558904
    Abstract: An electroluminescent device includes a light emitting layer made of a conjugated polymer that is prepared using halogen precursor route chemistry.
    Type: Grant
    Filed: July 8, 1994
    Date of Patent: September 24, 1996
    Assignee: Xerox Corporation
    Inventors: Bing R. Hsieh, Gordon E. Johnson, Homer Antoniadis, Kathleen M. McGrane, Milan Stolka
  • Patent number: 5559595
    Abstract: A special sheet handling apparatus is provided for use with a printing system, the printing system including a print engine. The special sheet handling apparatus includes a special sheet insertion path operatively coupled with the print engine. Substrates, each having a stock orientation and being imaged with the print engine, are delivered to the special sheet insertion path as output, while a special sheet, having a special sheet orientation, when disposed in the special sheet insertion path, is added to the output by the special sheet handling orientation. A processor determines whether the stock orientation is the same as the special sheet orientation. When the orientations are different, and the special sheet is invertible, the special sheet is inverted at an inverting station communicating with the special sheet insertion path.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: September 24, 1996
    Assignee: Xerox Corporiation
    Inventor: Michael E. Farrell
  • Patent number: 5558813
    Abstract: A liquid crystal-polymer composite film comprising a polymeric substance carrying a liquid crystal component and a non-liquid crystal component in the side chain thereof and having dispersed therein a low-molecular weight liquid crystal compound and an optical modulation element using the composite film are disclosed. The composite film can be driven at a low voltage and exhibits hysteresis.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: September 24, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Ryojiro Akashi, Toru Ishii, Tomozumi Uesaka
  • Patent number: 5559579
    Abstract: A developer control for enabling the use of developer and toner materials with widely varying At in high quality xerographic copying and printing. Pixel count data is combined with toner test patch reflectance data during a brief toner rundown to determine the rate of change of density per unit change in toner concentration. During toner rundown, dispensing of toner is suspended for a period of time for effecting toner concentration reduction by approximately 0.25%. The change in Toner Concentration (TC) is estimated using pixel counting. Additionally, toner test patches are created and the reflectance thereof is measured for determining the change in toner density. The estimated TC change and the change in toner density are processed using linear regression to find the average change in density sensor output for the estimated change in TC which is referred to as the rundown slope. The rundown slope is then compared to a target value.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: September 24, 1996
    Assignee: Xerox Corporation
    Inventors: Mark A. Gwaltney, Robert E. Grace
  • Patent number: 5559592
    Abstract: A method and apparatus for transferring a developed image made up of toner particles and a liquid carrier to copy sheet, wherein the developed image is heated to a temperature such that the toner particles are sintered to form a coherent bonded network of toner particles without melting the individual toner particles to form a substantially solid mass, and where the coalesced toner particles still retain mobility in an electrostatic field.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: September 24, 1996
    Assignee: Xerox Corporation
    Inventors: James R. Larson, David H. Pan, John S. Berkes
  • Patent number: 5559588
    Abstract: A liquid ink development (LID) reproduction machine for producing a stabilized liquid toner image having clean-background areas. The reproduction machine includes a movable image bearing member having a photoconductive surface, and latent image forming devices for forming a latent image on the photoconductive surface such that the latent image has image areas and background areas. The reproduction machine also includes a development apparatus containing liquid toner developer material for developing the latent image. The liquid toner developer material includes a carrier liquid having a relatively low conductivity for preventing shorting of image conditioning electric fields through a layer of the liquid toner developer material forming the image.
    Type: Grant
    Filed: September 13, 1995
    Date of Patent: September 24, 1996
    Assignee: Xerox Corporation
    Inventors: James R. Larson, Anthony M. Wallace, Clifford H. Griffiths, Dennis A. Abramsohn