Patents by Inventor John R. Washington

John R. Washington has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220350278
    Abstract: Printing apparatuses include a photoreceptor adapted to print an image by applying marking material to print media, a fuser adapted to heat the marking material on the print media, and a controller. The controller determines the amount of marking material per unit area of the image before the fuser heats the marking material on the print media. The controller rasterizes the image to produce a bitmap of the image, but the amount of marking material per unit area for the image is determined before completion of rasterization and marking of the image. The controller also adjusts the operating temperature of the fuser to a fusing temperature based on the amount of marking material per unit area of the image, causes the photoreceptor to print the image on the print media using the bitmap of the image, and causes the fuser to fuse the marking material to the print media.
    Type: Application
    Filed: April 28, 2021
    Publication date: November 3, 2022
    Applicant: Xerox Corporation
    Inventors: Michael J. Wilsher, John R. Washington, Graeme A. Adams
  • Patent number: 10222741
    Abstract: Disclosed is a xerographic printing apparatus and print cartridge including a deformable electrically conductive ring. According to an exemplary embodiment, a xerographic image rendering print cartridge includes a drive shaft, a photoreceptor drum and a deformable electrically conductive ring operatively associated with electrically connecting an inside surface of the photoreceptor drum to the drive shaft to provide a grounding electrical path.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: March 5, 2019
    Assignee: Xerox Corporation
    Inventors: Ian Burdon, Joseph R. Broughton, John R. Washington, Peter J. Cresswell
  • Publication number: 20190041793
    Abstract: Disclosed is a xerographic printing apparatus and print cartridge including a deformable electrically conductive ring. According to an exemplary embodiment, a xerographic image rendering print cartridge includes a drive shaft, a photoreceptor drum and a deformable electrically conductive ring operatively associated with electrically connecting an inside surface of the photoreceptor drum to the drive shaft to provide a grounding electrical path.
    Type: Application
    Filed: August 1, 2017
    Publication date: February 7, 2019
    Applicant: Xerox Corporation
    Inventors: Ian Burdon, Joseph R. Broughton, John R. Washington, Peter J. Cresswell
  • Patent number: 9180684
    Abstract: A method is provided for automatically positioning a print head (12) relative to a photoreceptor (14) in a xerographic print engine (10). The method includes: operating the print head (12) to produce an indicia in a latent image formed on the photoreceptor (14); measuring a dimension of the indicia; and automatically positioning the print head (12) relative to the photoreceptor (14) in response to a result of the measuring.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: November 10, 2015
    Assignee: Xerox Corporation
    Inventors: John R. Washington, Charlotte E. Przeslak
  • Publication number: 20150165785
    Abstract: A method is provided for automatically positioning a print head (12) relative to a photoreceptor (14) in a xerographic print engine (10). The method includes: operating the print head (12) to produce an indicia in a latent image formed on the photoreceptor (14); measuring a dimension of the indicia; and automatically positioning the print head (12) relative to the photoreceptor (14) in response to a result of the measuring.
    Type: Application
    Filed: December 18, 2013
    Publication date: June 18, 2015
    Applicant: Xerox Corporation
    Inventors: John R. Washington, Charlotte E. Przeslak
  • Patent number: 8763919
    Abstract: Method, system, and computer program product for generating a machine-readable code for an electronic document are disclosed. A user interface receives an input for defining one or more areas of interest in the electronic document. One or more location identifiers are determined corresponding to each of the one or more areas of interest. The machine-readable code is then generated for the electronic document based on the one or more location identifiers. Further, the machine-readable code is embedded in the electronic document. The machine-readable code when scanned and decoded enables extracting of one or more descriptors (e.g., text written in various locations specified by the one or more location identifiers). The one or more descriptors are used for at least one of naming the electronic document or determining the one or more attributes of the message.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: July 1, 2014
    Assignee: Xerox Corporation
    Inventor: John R. Washington
  • Publication number: 20140022572
    Abstract: Method, system, and computer program product for naming a digital image are disclosed. One or more descriptors from the digital image are identified based on at least one of the one or more text fields or a machine-readable code in the digital image. The one or more descriptors include at least one of information on a subject matter in the digital image or user-related information in the digital image. A filename is then assigned to the digital image based on the identified one or more descriptors.
    Type: Application
    Filed: July 17, 2012
    Publication date: January 23, 2014
    Applicant: XEROX CORPORATION
    Inventor: John R. Washington
  • Patent number: 8570543
    Abstract: An image recording apparatus including a memory element and a processor for a specially programmed general purpose computer. The memory element stores correction data for a plurality of locations on a photoreceptor for the image recording apparatus. The processor is for: inducing a charge on the photoconductive layer; receiving image data including, for said each location in the plurality of locations, a first or second desired voltage level; calculating, using the correction and image data, respective desired output power levels for a LED printbar for the apparatus, aligned with the plurality of locations, to discharge each location to the one of the first or second desired charge level, the respective desired output power levels selected to compensate for variances of respective induced charge levels at the plurality of locations; and supplying respective power inputs to the plurality of LEDs to generate the respective desired output power levels.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: October 29, 2013
    Assignee: Xerox Corporation
    Inventor: John R. Washington
  • Publication number: 20120206738
    Abstract: An image recording apparatus including a memory element and a processor for a specially programmed general purpose computer. The memory element stores correction data for a plurality of locations on a photoreceptor for the image recording apparatus. The processor is for: inducing a charge on the photoconductive layer; receiving image data including, for said each location in the plurality of locations, a first or second desired voltage level; calculating, using the correction and image data, respective desired output power levels for a LED printbar for the apparatus, aligned with the plurality of locations, to discharge each location to the one of the first or second desired charge level, the respective desired output power levels selected to compensate for variances of respective induced charge levels at the plurality of locations; and supplying respective power inputs to the plurality of LEDs to generate the respective desired output power levels.
    Type: Application
    Filed: February 16, 2011
    Publication date: August 16, 2012
    Applicant: Xerox Corporation
    Inventor: John R. WASHINGTON
  • Patent number: 7587160
    Abstract: A toner repelling stripper finger assembly is provided for stripping toner image carrying copy sheets from an outer surface of a moving heated fusing member. The toner repelling stripper finger assembly includes (a) a finger shaft having a first end for attaching to a baffle, and a second distal end; (c) an electrically conductive tip located at the second distal end of the finger shaft for contacting the outer surface of the moving heated fusing member to strip the toner image carrying copy sheets therefrom; and (d) an electrical biasing source connected to the electrically conductive tip for electrically biasing the electrically conductive tip to a desired electrical polarity, thereby repelling and preventing charged toner particles from being attracted and building up on the stripper finger assembly.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: September 8, 2009
    Assignee: Xerox Corporation
    Inventors: Leigh-Anne Thomas, John R Washington, Martin Callis, John Poxon, Lloyd Broughton
  • Publication number: 20080124140
    Abstract: A toner repelling stripper finger assembly is provided for stripping toner image carrying copy sheets from an outer surface of a moving heated fusing member. The toner repelling stripper finger assembly includes (a) a finger shaft having a first end for attaching to a baffle, and a second distal end; (c) an electrically conductive tip located at the second distal end of the finger shaft for contacting the outer surface of the moving heated fusing member to strip the toner image carrying copy sheets therefrom; and (d) an electrical biasing source connected to the electrically conductive tip for electrically biasing the electrically conductive tip to a desired electrical polarity, thereby repelling and preventing charged toner particles from being attracted and building up on the stripper finger assembly.
    Type: Application
    Filed: November 28, 2006
    Publication date: May 29, 2008
    Applicant: XEROX CORPORATION
    Inventors: Leigh-Anne Thomas, John R Washington, Martin Callis, John Poxon, Lloyd Broughton
  • Patent number: 6490900
    Abstract: Apparatus and method for gauging and rounding, at room temperature, a section of fully formed seamless ductile iron pipe that has an out-of-round initial cross-section profile and/or a larger than desired initial gauge. The apparatus includes a set of hour-glass shaped gauging/rounding rolls arranged so that the combined profiles of adjacent rolls forms a substantially continuous circular of precise diameter. In operation, the ductile iron pipe is passed though the opening in the set of gauging/rounding rolls, thereby causing the pipe to be gauged and rounded. The pipe is conveyed through one or two sets of rolls to accommodate multiple pipe diameters by a transport mechanism consisting of a rail mounted push car which is moved by one or more fluid actuated cylinders anchored to a base in common with the rail.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: December 10, 2002
    Assignee: American Cast Iron Pipe Company
    Inventors: Gene L. Oliver, John R. Washington
  • Patent number: 6319949
    Abstract: A method for preventing fungal diseases in crops which comprises the steps of: (a) applying to a crop an aqueous or a non-aqueous spray composition which includes a pesticide and a spray adjuvant including a solvent and an emulsifier, wherein the solvent is a mixture of aliphatic hydrocarbons having a distillation range of about 520 to 600° F. and an aromatic content of about 1% or less, or the solvent is a single or combination of C6-C18 fatty alcohol(s); and (b) applying chlorothalonil to the crop previously to, simultaneously with, or subsequently to the application of the aqueous spray composition, wherein phytotoxicity associated with the application of chlorothalonil is reduced or eliminated.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: November 20, 2001
    Assignee: Syngenta Limited
    Inventors: Jeffrey R. Schussler, Robert E. Moser, Kevin E. Crosby, John R. Washington