Patents by Inventor Changli CUI

Changli CUI 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 determining abnormality of temperature sensor and image forming apparatus using the same
    Patent number: 9046852
    Abstract: A method for determining abnormality of a temperature sensor and the image forming apparatus, the method comprises: detecting an actual temperature of a fixing apparatus and an input voltage; calculating an actual temperature variation amount in a predetermined time period; comparing the detected input voltage and a predetermined voltage; comparing the calculated actual temperature variation amount and a first reference temperature variation amount if the input voltage is greater than the predetermined voltage; determining that the temperature sensor is abnormal if the actual temperature variation amount is less than the first reference temperature variation amount; comparing the calculated actual temperature variation amount and a smaller second reference temperature variation amount if the input voltage is equal to or less than the predetermined voltage; determining that the temperature sensor is abnormal if the actual temperature variation amount is less than the second reference temperature variation amou
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: June 2, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Changli Cui, Tianji Xu, Gui Chen
  • METHOD FOR DETERMINING ABNORMALITY OF TEMPERATURE SENSOR AND IMAGE FORMING APPARATUS USING THE SAME
    Publication number: 20140086600
    Abstract: A method for determining abnormality of a temperature sensor and the image forming apparatus, the method comprises: detecting an actual temperature of a fixing apparatus and an input voltage; calculating an actual temperature variation amount in a predetermined time period; comparing the detected input voltage and a predetermined voltage; comparing the calculated actual temperature variation amount and a first reference temperature variation amount if the input voltage is greater than the predetermined voltage; determining that the temperature sensor is abnormal if the actual temperature variation amount is less than the first reference temperature variation amount; comparing the calculated actual temperature variation amount and a smaller second reference temperature variation amount if the input voltage is equal to or less than the predetermined voltage; determining that the temperature sensor is abnormal if the actual temperature variation amount is less than the second reference temperature variation amou
    Type: Application
    Filed: September 13, 2013
    Publication date: March 27, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Changli CUI, Tianji XU, Gui CHEN