APPARATUS AND METHOD FOR TRACKING DEFECTS IN SHEET MATERIALS

摘要

The invention relates to a method for marking a material defect in a sheet material. In order to provide a method that can be used to identify a material defect in a sheet material particularly accurately, reliably and permanently, provision is made for a material defect in a moving sheet material to be sensed by a defect sensor and for a surface structure feature in the region of the sensed material defect to be sensed by a first marking sensor (4a) and for a first structure data record representing the surface structure feature to be ascertained and stored.