Device for feeding an elastically extendable yarn to hosiery kni

Details Device for feeding an elastically extendable yarn to hosiery kni Device for feeding an elastically extendable yarn to hosiery kni

1998-02-17

2000-08-01

Falik, Andy

Textiles: knitting

Feeding

Strand tensions

66132R, 139194, 226 30, 226181, 226 45, D04B 1550

Patent

active

060949457

ABSTRACT:
A device for feeding an elastically extendable yarn to hosiery knitting machines, which includes a positive yarn feeder composed of two mutually opposite contrarotating rollers which have parallel axes and between which the yarn to be fed passes. Elements are provided for rotationally actuating at least one of the rollers about its own axis with a rotation rate which can vary on command. Downstream of the positive feeder along the yarn feed direction, there are arranged elements for detecting the tension of the yarn and a programmable control and monitoring unit which is operatively connected to the detector elements. The control and monitoring unit compares the yarn tension detected by the detector elements with a yarn tension which is preset in the control and monitoring unit. The control and monitoring unit is also operatively connected to the rotary actuation means in order to vary the rotation rate of the roller of the positive feeder in order to maintain within a preset tolerance range the difference between the detected yarn tension and the preset yarn tension.

REFERENCES:
patent: 3677036 (1972-07-01), Hatay
patent: 4625528 (1986-12-01), Damau Guell
patent: 4645109 (1987-02-01), Fleissner
patent: 4662407 (1987-05-01), Duncan
patent: 5381676 (1995-01-01), Shibata et al.

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