Patent ID: 8085973
Filing Date: 2011-12-27
Classification: B41F,B65H

Abstract:
1. A method for the detection, at the correct time, of print marks located at regular intervals on a print web, comprising: providing a camera with a processing unit assigned to the camera; continuously feeding process data from a drive control system to the processing unit, wherein the drive control system controls a movement of the print web; calculating a plurality of initial detection times based on the supplied process data, where the initial detection times are coordinated with one another such that a print mark is shown on at least one image recorded at one of the initial detection times using the camera; activating the camera at the initial detection times to record images; evaluating the recorded images by searching for a print mark on the images and obtaining initialization data by the processing unit; calculating a first pass detection time based on the initialization data and the supplied process data by the processing unit such that a print mark is shown on an image recorded at the first pass detection time using the camera; activating the camera at a first pass detection time to record an image; and subsequently repeating the following steps: