The Advances in Marking Technologies for Defect Identification, PaperCon 2013

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Certain defects in a web will cause problems in subsequent processes or quality issues in the final product; therefore, they must be removed prior to shipping. Not only is defect identification important but also marking identified defects to warn downstream operators to take preventative actions. It has been a common practice to have machine operators manually make marks for process upsets or any other observed defects that may occur during production. However, manually marking with hand flags or crayons can be hazardous and may also violate important safety protocol. Automated defect marking systems provide marking for defect identification and can be interfaced to web inspection systems or other process control equipment. Once marked, defect positions can be found visually by operators or automatically with detection devices such as cameras or sensors. Defect marking systems help create safer work environments, reduce down time when removing defects, and identify exact locations of defects in the roll for converters. Automated defect marking can help prevent process upsets, increase process efficiency, and ensure that necessary defects are removed from the final product.