Patent ID: 7216952
Filing Date: 2007-05-15
Classification: B41J,G03G,H04N

Abstract:
1. A multicolor-printer, comprising: at least a first and a second print station arranged to print images on a surface of a moving recording medium; first and second optical sensors configured to detect a non-printed pattern structure on the surface of the recording medium, viewing, at the first and second print stations, an area of the recording medium surface to obtain at least one first surface recording, in a manner related to the first print station's image printing, and second surface recordings, respectively, wherein the first surface and second surface recordings are recordings of non-printed pattern structures; a storage arranged to store the first surface recording; a surface recordings comparator arranged to test, during the recording medium movement, for correspondence of second surface recordings with the stored first surface recording; wherein the printer is arranged to repeatedly, within one image, re-register raster lines of the image of the second print station to corresponding raster lines of the image of the first print station in response to correspondences found between the first and second surface recordings.