Patents by Inventor R. Douglas Carter

R. Douglas Carter 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: 5041941
    Abstract: An apparatus and method for removing an accumulated charge or for applying a predetermined electrical charge to a web of polymer coated paperboard that is printed with electron beam (EB) cured inks. During the EB printing process, the polymer coated surface may accumulate a charge in excess of 500 volts as a result of the EB irradiation. The accumulated charge may be removed by passing the web through a charging zone where a voltage is applied to the web having the same polarity as the charge on the web. A control system for measuring the charge on the web received by the EB irradiation and for adjusting the extent and sign of the voltage applied to the web for placing a predetermined electrical charge condition on the web is included.
    Type: Grant
    Filed: December 6, 1989
    Date of Patent: August 20, 1991
    Assignee: Westvaco Corporation
    Inventors: R. Douglas Carter, David W. Paxton, William H. Plummer, Jr.