Title: Method of, apparatus for, transporting yarns through measuring units

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Claims: What is claimed is:

1. An apparatus for transporting yarns, especially filaments, through a measuring unit, comprising: a measuring unit; means for delivering a yarn to said measuring unit including a pair of delivery rollers preceeding the measuring unit in the direction of travel of the yarn; nozzle means engaging the yarn downstream of said measuring unit for applying a uniform adjustable tension to the yarn in the measuring unit, said nozzle means including a nozzle having an air chamber, a three-way cock and a pair of airlines tangentially opening into the nozzle chamber on opposite sides thereof and being connected to respective outlets of said three-way cock; and air supply means for applying air under pressure to said cock so that a flow of air can be selectively applied through the line opening tangentially into the nozzle chamber from one side or from the other side to produce a vortex of air therein which will impart an S- or Z-twist to the yarn, respectively.

2. An apparatus as claimed in claim 1, wherein said three-way cock has a neutral position in which air is supplied simultaneously to both airlines, so that no air vortex is formed in the nozzle and, hence, no twist imparted to the yarn.

Other info:

Inventors: Heusser, Eduard (Uster, CH)

Application Number: 509220
Filing Date: 1974-09-25
Publication_date: 1976-04-20
Assignee: Zellweger, Ltd. (CH)
Primary Class(es): 226/97.4 28/289, 57/333, 226/108
Other Classes:
US Patent Ref:

2173789	Sep, 1939	Nikles	226/97.
2497017	Feb, 1950	Shann	200/61.
2990671	Jul, 1961	Bunting	57/77.
3613347	Oct, 1971	Carruthers	57/1.

Other Refs:
Primary Examiner: Schacher, Richard A.
Assistant Examiner:
Attorney: Craig & Antonelli