Patents by Inventor David N. Redden

David N. Redden 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).

  • Method and apparatus for controlling humidity in a copying device
    Patent number: 6894761
    Abstract: A method and apparatus are provided to control the atmosphere inside of a xerographic control module of an image forming device so that a dew point condition is not reached. The parameters of the atmosphere within the xerographic chamber which are controlled include pressure, temperature and humidity.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: May 17, 2005
    Assignee: Xerox Corporation
    Inventors: Karl B. Ayash, Thomas C. Hollar, Ali R. Dergham, David N. Redden, John H. Steele
  • Method and apparatus for controlling humidity in a copying device
    Publication number: 20040125349
    Abstract: A method and apparatus are provided to control the atmosphere inside of a xerographic control module of an image forming device so that a dew point condition is not reached. The parameters of the atmosphere within the xerographic chamber which are controlled include pressure, temperature and humidity.
    Type: Application
    Filed: July 22, 2003
    Publication date: July 1, 2004
    Applicant: Xerox Corporation
    Inventors: Karl B. Ayash, Thomas C. Hollar, Ali R. Dergham, David N. Redden, John H. Steele
  • Method and apparatus for controlling humidity in a copying device
    Patent number: 6621554
    Abstract: A method and apparatus are provided to control the atmosphere inside of a xerographic control module of an image forming device so that a dew point condition is not reached. The parameters of the atmosphere within the xerographic chamber which are controlled include pressure, temperature and humidity.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: September 16, 2003
    Assignee: Xerox Corporation
    Inventors: Karl B. Ayash, Thomas C. Hollar, Ali R. Dergham, David N. Redden, John H. Steele
  • Optical system for providing visual aid for proper magnification selection
    Patent number: 4244649
    Abstract: In a full-frame, copying system, translucent registration guides along the edges of a platen area provide an operator with an indication of which portion of a document overlying the platen will be copied onto selected copy paper at the particular magnification ratio selected. Illumination sources located on the image side of a projection lens create line images which are projected through the lens to illuminate appropriate registration guides corresponding with the particular magnification ratio.
    Type: Grant
    Filed: May 24, 1979
    Date of Patent: January 13, 1981
    Assignee: Xerox Corporation
    Inventors: James D. Rees, David N. Redden, Craig A. Smith, Paul H. Stiebitz
  • Multiple range variable magnification reproduction machine
    Patent number: 4093374
    Abstract: A document reproduction machine having a multiple range of magnifications employs a scanning optical system which is controlled as to scanning speed and distance of travel by the selected magnification. In the higher reduction copying ranges the speed of the scanning optical system is automatically increased in proportion to the selected magnification reduction, but the increase in scanning distance is limited to the platen size. Multiple cams are employed for each range of magnification, and means are provided to change the scanning drive means between the multiple cams.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: June 6, 1978
    Assignee: Xerox Corporation
    Inventors: Edwin Zucker, David K. Shogren, David N. Redden