Apparatus for producing an image on a first side of a substrate and a mirror image on a second side of the substrate

An apparatus for producing an image on a first side of a substrate and a mirror image on a second side of the substrate, comprising:

• a computer that converts signals representing each pixel of the image in gray scale into signals representing each pixel of the image with a uniform density;
• a first printhead driven relative to the first side of the substrate for applying ink to the first side of the substrate;
• a second printhead driven relative to the second side of the substrate for applying ink to a second side of the substrate;
• a substrate suspension system that supports a substrate feed roll, that drives the substrate relative to said first and second printhead from the substrate feed roll to a substrate rewind roll, and that tensions the substrate to maintain the substrate taut during the application of ink by said first and second printhead;
• and
• a print control system that inputs the signals representing each pixel of the image with a uniform density and utilizes those signals to control said first printhead to produce the image on the first side of the substrate and said second printhead to produce the mirror image on the second side of the substrate.