US 4,854,118 A · Methof of, and apparatus for, producing a friction spun yarn

Abstract

The method of, and apparatus for, producing a yarn uses a friction spinning device comprising a perforated first friction spinning drum and a second friction spinning drum which can also be perforated. Two fiber feed passages project to the first friction spinning drum and are each supplied by opening assemblies which individualize or individually separate the fibers. The fibers are transported toward the first friction spinning drum using a feed air stream in the fiber feed passages. This feed air stream is produced by the first friction spinning drum which is maintained under sub-pressure. Advantageously, the fiber double-feed to the friction spinning drum permits supplying two different fiber types to the same yarn end. Also, different inclinations of the fibers at the friction spinning drum can be obtained by different inclinations of the fiber feed passages in order to produce yarns of different character. The first and second friction spinning drums can be each divided into cooperating drum sections to define a first pair of coacting drum sections and spaced therefrom a second pair of coacting drum sections. The respective pairs of drum sections can be operated at different rotational speeds and can be subjected to different vacuum conditions.

Claims13

Dependent claims

A method of producing a yarn or the like, comprising the steps of:

separating fibers from two fiber strands;
transferring said separated fibers to two spacedly arranged friction spinning means each having a respective yarn forming location at different transfer rates towards related ones of said yarn forming locations;
forming a friction spun yarn at said yarn forming locations of said two spacedly arranged friction spinning means;
during said step of forming said friction spun yarn, drawing-in by suction an air stream through a respective perforated surface into each of said two spacedly arranged friction spinning means and thereby transferring said separated fibers to said perforated surfaces;
withdrawing said friction spun yarn in a predetermined yarn withdrawal direction;
during said step of transferring said separated fibers to said two spacedly arranged friction spinning means, transferring said separated fibers of said two fiber strands at least at two fiber delivery locations in a respective predeterminate direction to each of said spacedly arranged friction spinning means;
and
imparting different twist directions to the separated fibers at each respective yarn forming location.

5 more elements

A method of producing a yarn or the like, comprising the steps of:

separating fibers from two fiber strands;
transferring said separated fibers to two spacedly arranged friction spinning means each having a respective yarn forming location;
twisting said separated fibers in different twisting directions about yarn ends present at said related yarn forming locations and thus forming a friction spun yarn at said yarn forming locations of said two spacedly arranged friction spinning means;
during said step of forming said friction spun yarn, drawing-in by suction an air stream through a respective perforated surface into each of said two spacedly arranged friction spinning means and thereby transferring said separated fibers to said perforated surfaces;
withdrawing said friction spun yarn in a predetermined yarn withdrawal direction;
and
during said step of transferring said separated fibers to said two spacedly arranged friction spinning means, transferring said separated fibers of said two fiber strands at least at two fiber delivery locations in a respective predeterminate direction to each of said spacedly arranged friction spinning means.

4 more elements