Patents Examined by Peter C. Wong
  • Method for manufactuing a stamp to emboss wire cloths in order to make watermarks and equipment to implement this method
    Patent number: 5486928
    Abstract: A new process for making an embossing punch comprises the steps of: (a) the values of an image are put into numeric form; and, (b) the punch is automatically and directly engraved. The numeric image is converted into continuous control values for a path of an engraving tool over a continuous surface and the level curves of said surface are plotted to provide the continuous engraving path. One possible application is embossing fabrics for the manufacture of watermarked paper.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: January 23, 1996
    Assignee: Arjo Wiggins S.A.
    Inventors: Pierre Doublet, Claude Passebecq, Etienne Bigot