Patents by Inventor Yves Douesneau

Yves Douesneau 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).

  • Security paper comprising localized areas with reduced thickness and opacity, and method for making same
    Patent number: 6402888
    Abstract: A method for making a paper sheet comprising at least one region which is thinner than the rest of the sheet. According to the method, a first paper layer (3) is formed on a wire in a first wet end of a paper-making machine, a second paper layer (5) is formed on a wire in a second wet end of the paper-making machine, one of the two paper layers has a number of localized tinner regions (8) so that the thickness (e2) of said paper layers in said regions is up to 50% less than the thickness (et) of the rest of the sheet, and the two layers are joined together and dried. The resulting paper may be used in banknotes or checks.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: June 11, 2002
    Assignee: Arjo Wiggins
    Inventors: Pierre Doublet, Yves Douesneau, Jean-Paul Menez