The present invention is a method to generate alignable orthogonal images from non-orthogonal scans in a double-sided digital-offset-press arrangement by shifting the image data in the multi-channel modulators in a direction and rate that keeps the images orthogonal. The image data is shifted parallel...http://www.google.fr/patents/US6637329?utm_source=gb-gplus-shareBrevet US6637329 - Method for improving registration of images on opposing sides of a printing medium
Method for improving registration of images on opposing sides of a printing ...
