Patents by Inventor Totsuka Kenji

Totsuka Kenji 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 for calibrating a drive motor for a toner metering device in an imaging apparatus
    Patent number: 8653773
    Abstract: In an imaging apparatus having a toner container, a method of periodically calibrating a back EMF constant Ke used in a speed control circuit of a DC motor used for driving for a toner metering device. To adjust the value of the back EMF constant Ke, the method uses a plurality of sampled back EMF measurements together with a calculated actual speed of rotation of the toner metering device as measured using motion sensor.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: February 18, 2014
    Assignee: Lexmark Internatonal, Inc.
    Inventors: Timothy Leo Brown, Totsuka Kenji
  • Method for Calibrating a Drive Motor for a Toner Metering Device in an Imaging Apparatus
    Publication number: 20130202275
    Abstract: In an imaging apparatus having a toner container, a method of periodically calibrating a back EMF constant Ke used in a speed control circuit of a DC motor used for driving for a toner metering device. To adjust the value of the back EMF constant Ke, the method uses a plurality of sampled back EMF measurements together with a calculated actual speed of rotation of the toner metering device as measured using motion sensor.
    Type: Application
    Filed: February 2, 2012
    Publication date: August 8, 2013
    Inventors: Timothy Leo Brown, Totsuka Kenji