Patents Assigned to Bridgestone Graphic Technologies, Inc.
  • Method for embossing holograms into aluminum and other hard substrates
    Patent number: 6017657
    Abstract: Surface relief holograms are prepared by directly impressing them into aluminum and other hard metal substrates, without the need to preheat or otherwise soften the substrate. A holographic embossing shim is prepared from a master and possesses a unique combination of surface configuration, hardness, and strength. The embossing shim can be mounted on a cylindrical support. In one embodiment, the shim is used to emboss a hardenable material, which is later hardened to form a tool.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: January 25, 2000
    Assignee: Bridgestone Graphic Technologies, Inc.
    Inventors: Brian R. Mentz, Timothy F. Dolan