Patents by Inventor David Feinauer

David Feinauer 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).

  • Optical sensor system with a dynamic threshold for monitoring toner transfer in an image forming device
    Patent number: 7593653
    Abstract: A method and device for monitoring toner transfer within an image forming device is described herein. A reflectivity sensor senses movement of a toner transfer gear operatively connected to a toner transfer system. A threshold unit generates a dynamic threshold based on the output of the reflectivity sensor. In one embodiment, the threshold unit generates the dynamic threshold based on a time delayed average of the sensor output. An instantaneous sensor output is compared to the dynamic threshold. Based on the comparison, the device determines the how much the toner transfer gear has rotated, and therefore, how much toner has been transferred from the toner cartridge.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: September 22, 2009
    Assignee: Lexmark International, Inc.
    Inventors: John Parker Richey, David Feinauer, Mark Alan Stuart
  • Optical Sensor System With A Dynamic Threshold For Monitoring Toner Transfer In An Image Forming Device
    Publication number: 20090052911
    Abstract: A method and device for monitoring toner transfer within an image forming device is described herein. A reflectivity sensor senses movement of a toner transfer gear operatively connected to a toner transfer system. A threshold unit generates a dynamic threshold based on the output of the reflectivity sensor. In one embodiment, the threshold unit generates the dynamic threshold based on a time delayed average of the sensor output. An instantaneous sensor output is compared to the dynamic threshold. Based on the comparison, the device determines the how much the toner transfer gear has rotated, and therefore, how much toner has been transferred from the toner cartridge.
    Type: Application
    Filed: August 22, 2007
    Publication date: February 26, 2009
    Inventors: John Parker Richey, David Feinauer, Mark Alan Stuart