Patents by Inventor Andrew John CLIPPINGDALE, JR.

Andrew John CLIPPINGDALE, JR. 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 of operating an electrostatic printhead
    Patent number: 9475281
    Abstract: A method of reducing and/or preventing the accumulation of concentrated ink at an ejection point of a printhead of an electrostatic inkjet printer when ink is not being ejected at the ejection point, the method comprising reversing the electric field at the ejection point of the printhead during a non-printing phase of operation to reduce the concentration of ink at the ejection point.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: October 25, 2016
    Assignee: Tonejet Limited
    Inventors: Andrew John Clippingdale, Jr., Ammar Lecheheb, John Lawton Sharp
  • A METHOD OF OPERATING AN ELECTROSTATIC PRINTHEAD
    Publication number: 20160121603
    Abstract: A method of reducing and/or preventing the accumulation of concentrated ink at an ejection point of a printhead of an electrostatic inkjet printer when ink is not being ejected at the ejection point, the method comprising reversing the electric field at the ejection point of the printhead during a non-printing phase of operation to reduce the concentration of ink at the ejection point.
    Type: Application
    Filed: June 4, 2014
    Publication date: May 5, 2016
    Inventors: Andrew John CLIPPINGDALE, JR., Ammar LECHEHEB, John Lawton SHARP