Image transfer method for one way vision display panel

  • US 5,525,177 A
  • Filed: 09/01/1994
  • Issued: 06/11/1996
  • Est. Priority Date: 09/01/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of producing an image onto a surface of a one-way vision display panel of the type which is constructed as a perforated membrane having an opaque light-reflective surface and a light-absorbing surface and whereby the image is clearly visible when viewing the display panel from one direction and wherein the perforated membrane permits substantially unobstructed through-viewing when viewing the display panel from a second, opposite direction, said method for substantially eliminating a corona effect of the image when the one-way vision display panel is viewed in the through-viewing direction, comprising the steps of:

  • a) electrostatically transferring ink onto a transfer medium as a reverse image for temporarily holding the reverse image for later transfer to a surface of a perforated membrane;

    b) preparing a membrane having an opaque light-reflective surface and a light-absorbing surface, and wherein the membrane is perforated, being defined by a plurality of spaced through-holes separated by solid bar portions; and

    c) using pressure to transfer the reverse image from the transfer medium as a desired correctly oriented image onto only solid bar portions of the opaque light-reflective surface of the perforated membrane without any substantial image transfer into or through the through-holes such that the correctly oriented image is substantially undetectable when looking at the one-way vision display panel in the second, opposite through-viewing direction.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×