Patent ID: 7423280
Filing Date: 2008-09-09
Classification: B41F

Abstract:
1. A web inspection module for scanning an imprinted web in a printing press, wherein the web which has been imprinted with different colors at a plurality of printing units of the printing press is moving in a longitudinal direction, and a lateral direction is substantially perpendicular to the longitudinal direction, the module comprising: a light source for illuminating a portion of the web; a housing; a contact image sensor mounted within the housing and having a plurality of sensing elements arranged in the lateral direction, wherein each sensing element measures light reflected by a corresponding image region on the web to produce image data representative of the corresponding image region printed on the web, wherein a width of each sensing element is substantially equal to a width of the corresponding image region measured in the lateral direction; and a processor for receiving and processing image data representative of the imprinted web, the processor comparing image data representative of the corresponding image region printed on the web with stored reference image data corresponding to a desired image region printed on the web to detect at least one of an ink color error and a color registration error.