Patents by Inventor Ali R. Dergham

Ali R. Dergham 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: 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
  • Ambient atmospheric pressure compensation controller for pressurized copying device
    Patent number: 6334033
    Abstract: A method and apparatus for maintaining the air pressure within a xerographic module/chamber of an image forming device above ambient pressure outside of the xerographic module/chamber which uses a pressure sensor, e.g., an altimeter to monitor ambient atmospheric pressure, and a microprocessor to control and maintain air pressure to a determined set point.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: December 25, 2001
    Assignee: Xerox Corporation
    Inventors: Karl B. Ayash, Thomas C. Hollar, Ali R. Dergham, Dennis M. Ankrom