Patent ID: 7982917
Filing Date: 2011-07-19
Classification: B42D,Y10S

Abstract:
1. A document comprising: a latent security image which is visible when the document is reproduced after being scanned by a standard commercial bank scanner; the security image comprising a plurality of lines, the lines having a line frequency and a density such that the image is reproduced after being scanned by the standard commercial bank scanner, and the security image lines having a line frequency between about 25 lines per inch and about 105 lines per inch and a density between about 10% and about 95%; a background which is not visible when the document is reproduced after being scanned by the standard commercial bank scanner; and the background comprising a plurality of lines, the background lines having a line frequency and a density such that the background is not reproduced after being scanned by the standard commercial bank scanner, the background lines having a frequency less than about 25 lines per inch or greater than about 105 lines per inch and a density less than about 10% or greater than about 95%, and, the background lines being printed at a different angle than the lines of the security image.