Patent ID: 7906198
Filing Date: 2011-03-15
Classification: B41M,B42D,G03G,H04N,Y10T

Abstract:
1. A document carrying a latent image comprising: a background area formed at a first color; a first latent image portion printed with a line frequency at a first angle and a second color; a second latent image portion printed with a line frequency, at the first angle and a third color; the first latent image portion and the second latent image portion overlapping within a common area that is separate from the background area which at least partially surrounds the common area; the common area of the first latent image portion and the second latent image portion appearing as substantially the same color as the first color so that the latent image is obscured to the eye; and the first latent image portion including printed lines, dots or spots, and the second latent image portion includes printed lines, dots or spots placed between adjacent printed lines, dots or spots of the first image portion.