Patents by Inventor John R. Cheetham

John R. Cheetham 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).

  • Patent number: 8363075
    Abstract: A printhead and print system is provided that includes a printer and a control unit connected by a cable. The printhead has a printed circuit board that is modified to include a digital thermometer having a non-volatile memory programmed with the printhead resistance. The control unit reads the printhead resistance directly from the printhead which improves print quality and eliminates the need for manual entry of the printhead resistance when the printhead is replaced. The modified printhead also uses fewer wires in the cable, allowing the cable to be made thinner and more manageable, and increasing the accuracy of temperature measurements conveyed thereover.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: January 29, 2013
    Inventors: James L. Mason, John R. Cheetham
  • Publication number: 20110249070
    Abstract: A printhead and print system is provided that includes a printer and a control unit connected by a cable. The printhead has a printed circuit board that is modified to include a digital thermometer having a non-volatile memory programmed with the printhead resistance. The control unit reads the printhead resistance directly from the printhead which improves print quality and eliminates the need for manual entry of the printhead resistance when the printhead is replaced. The modified printhead also uses fewer wires in the cable, allowing the cable to be made thinner and more manageable, and increasing the accuracy of temperature measurements conveyed thereover.
    Type: Application
    Filed: April 12, 2010
    Publication date: October 13, 2011
    Inventors: James L. Mason, John R. Cheetham