Device for detecting defects i.e. cracks etc. in web

摘要

Device includes several probes (3) arranged to come in contact with a web (1) on a carrier path of the web (1) which consists of a slit sheet or a nonwoven fabric, and a detector means (6b) provided under the web. The probes (3) are rotatably supported. They roll along the web surface and dip at defective portions of the web (1). When the probes (3) dip and protrude downwardly through the web, the detector means (6b) generates defect detection signals.