MARKING DEVICE FOR FLAW PORTION ON STRIP

摘要

PURPOSE:To enable a portion with flaw to be identified easily when inspecting it again. CONSTITUTION:A title item consists of a flaw detection device 6 for detecting a flaw on a strip surface based on an amount of voltage which is obtained by scanning the strip surface with laser beam and then receiving a reflection light with a photoelectric conversion element a tracking device 11 for tracking a travel of any position in length direction of the strip based on a peripheral speed of a strip transport roller, and a marking device 12 for performing marking on the portion with flaw on the strip which is obtained from the flaw data from the flaw detection device and the flaw position traveling data from the tracking device. Since a mark is given to the portion with flaw on the strip, a purchaser of a material can find the portion with flaw easily when uncoiling it.