An apparatus for determining, without contact, the degree of interlacing of a multifilament yarn

摘要

An apparatus for determining the degree of interlacing of a multifilament yarn and particularly the distance between interlacing points does so by inducing static electricity in the yarn so that the filaments separate between interlacing points. The apparatus comprises yarn input mechanism (2); an electrode (4) for connection with a high voltage d.c. source, which has a thread guide eyelet and which is provided with a spark-proof insulator (5) having a thread duct (24); a thread guide (9) connected with earth; a take-off device (10), and an electro-optical device (7, 8) which records interlacing points, arranged in a common housing. The distance between interlacing points is expressed both in analogue form (18) and digital form (19 to 22). The apparatus preferably also comprises an air moistening device (14) for introducing moistered air into the immediate vicinity of the electrode. IMAGE