Patents by Inventor Ival Lee Toepke

Ival Lee Toepke 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: 4086088
    Abstract: The improved modulator of this invention is constructed by sandwiching a metal screen between a photoconductive layer and an insulating layer which permits processing of the multi-layered element by directing all processing steps against the photoconductive surface so as to provide separate and distinct fringing fields across the insulating layer which correspond to the image and non-image portions of the subject matter to be reproduced. The processing steps call for first applying a blanket DC electrostatic charge from a DC biased corona, followed by the application of a DC charge, from a DC biased corona, which is opposite in polarity to the charge applied in the first step, and a third step in which the entire member is flood illuminated to place the photoconductive layer in a conductive state.
    Type: Grant
    Filed: March 25, 1976
    Date of Patent: April 25, 1978
    Assignee: Addressograph Multigraph Corporation
    Inventor: Ival Lee Toepke