Patent ID: 6244030
Filing Date: 2001-06-12
Classification: B65H,D01H,G01N

Abstract:
A process for obtaining information concerning a yarn that may have therein pieces of different types of foreign matter of different lengths and light reflectivity, comprising:establishing a classifying matrix having a plurality of fields each representing a range of length values and a range of reflected light values, with certain of said fields being correlated with the typical lengths and reflected light values of different types of foreign matter found in yarns,passing the yarn lengthwise through a detector and periodically producing an electrical signal indicating a value for the amount of light being reflected from a yarn portion having a piece of foreign matter therein and indicating the lengthwise extent of such foreign matter in said yarn portion;comparing said electrical signals with said classifying matrix to classify the signals from yarn portions containing pieces of different types of foreign matter in fields correlated respectively with the typical lengths and reflected light values of the different types of foreign matter found in yarns; andinitiating an action in response to the classification of a signal into a predetermined one of said fields.