CORE YARN AND METHOD OF MAKING SAME

FIL D'AME ET METHODE DE FABRICATION CONNEXE

English Abstract

ABSTRACT OF THE DISCLOSURE
A slubbing is formed into a thin band by a plurality
of pairs of rollers. A core filament is thereafter applied
to each face of this band and the two core filaments and band
are then spun together to form a core yarn comprised of a
coherent mass of fibers in which is imbedded a pair of
parallel and spaced apart core filaments with some of the
fibers of the mass between the spaced-apart filaments.

Claims

The embodiments of the invention in which an exclusive
property or privilege is claimed are defined as follows:

1. A method of making a yarn comprising the steps of:
feeding a coherent elongated slubbing to a combining
station,
simultaneously feeding a pair of core filaments in
spaced-apart relationship to said station,
uniting said filaments and said slubbing at said sta-
tion with a portion of said slubbing between said filaments, and
thereafter spinning the united filaments and slubbing
together.

2. The method defined in claim 1, further comprising
the step of forming said slubbing into a flat band prior to feed-
ing same to said combining station, said filaments being united
with said slubbing by positioning said filaments on opposite
faces of said band.

3. The method defined in claim 2, wherein said fila-
ments are positioned parallel to each other on opposite faces of
said band.


4. The method defined in claim 3 wherien said filaments
are positioned both in a common plane perpendicular to said band
at said station.

5. The method defined in claim 3 wherein said filaments
are positioned on opposite sides of said bands offset to a plane
perpendicular to the plane of said band.

6. The method defined in claim 2 wherein said slubbing
is formed into a band by passing said slubbing between a plurali-
ty of pairs of rollers.


7. A core yarn made by the method of claim 1 and com-
prising a pair of longitudinally extending core filaments of
synthetic resin mutually spun about one another and an elongated
body of coherent fiber fleece selected from the group which con-
sists of cotton, wool and rayon, lying between and wrapped as a
band around said filaments and spun therearound to envelop said
filaments, said fleece forming a mass in which said filaments
are embedded and which has a cross-sectional area which is a
multiple of that of said core filaments.

Description

SPECIFICATION

~ield of the Invention
.
The present invention relates to a core yarn.
More particularly this invention concerns a yarn having a
core filament and a mass of a fleece-type fibers completely
surrounding this core filament.


Backaround of the Invention
A core yarn is known having a relatively strong
core filament surrounded by a sot mass of fibers. Such a
yarn is very soft yet at the same time has considerable
longitudinal strength derived from the strong core filament.


The disadvantage of such a yarn i~ very frequently
the fiber covering separates from the core. Furthermore
the core filament is frequently eccentric to the yarn so that
after only a small amount of wear this core filament is
exposed.


Obiects of the Invention
It i5 thereore an object to provide an improved
core yarn.


Another object is to provide such a core yarn where-
in the core filament is roughly centered within the yarn
and wherein the covering does not tend to separate from the
core filament.



Ye. another object is the provision of an imprsved
method of making such a yarn.


Summarv of the Invention
These objects are obtained according to the present
invention in a yarn having a pair of such core ~ilarnents
spaced apart within a fiber mass with a portion of this mass

- 1 - il

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constituting ~he covering between the two or more core
filaments.
.,
With such a system the fiber mass is securely held
by the core filaments especially when the core filaments are
spun together around the mass between them. Thus separation of
the fiber covering from the core filaments is almost rules out.
The strength and resistance to wear of such a yarn is sub-
stantially greater than that of prior-art core yarms.

The yarn according to the present invention is made
10 by spinning a pair of core filaments with a fiber slubbing.
The core filaments are fed to a combining station spaced apart
from each other and there united with the slubbing so that
some o the slubbing is always between the two filaments. This
, is effected in accordance with the present invention by form-
ing the slubbing into a thin band, then applying the filaments
to opposite sides of the band, and thereupon spinning to-
gether the band and slubbing so that the filaments remain
separated by at least a thickness of fiber equal to the thick-
d
ness of the slubbing band.

Thc filament~ in accordance with this invention may
be fed to the combining station directly opposite one another
on opposite sides of the slubbing band, that is both lying in
a plane perpendicular to the plane of the band. It is also
within the scope of the present invention to feed these fila-
ments to the combines parallel to each other but spaced apart
on opposite sides of the slubbing band from a plane perpen-
dicular to this band.

` Brief Descri~tion of the Drawina
The above and other objects, features, and advantages
30 will become more readily apparent from the follo~ing, reference

~.


: ` . - .:

~n4~s42
beiny made to the accompanying drawin~ in which:


FIG. 1 is a cross-section in enlarged scale throuyh
a yarn according to this invention;

FIG. 2 is a partly diagrammatic perspective view
showing a system for making the yarn accordiny to this inven-
tion;

FIG. 3 is a section taken along line III - III of
FIG. 2; and

FIG. ~ is a ~ection similar to FIG. 3 illustra~ing
another method of making the yarn accordin~ to this invention.


sDeci~ic Descri~tion
A core-type yarn 10 is shown in FIG. 1. It comprises
a coherent mass 16 formed of fibers such as wool, cotton, rayon,
or staple fiber, in which is imbedded a pair of like and spaced-
-apart filaments 12 and 14 of high-strength synthetic-resin
material such as polyester. The mass 16 has a cross-sectional
area that is a multiple of that of the filaments 12 and 14.
The ilaments 12 and 14 can be mono~ilaments or a tightly wound
thread but in any case have a longitudinal strength which i8
considerably greater than the longitudinal strength of the co-
herent mass 16. m ese filaments 12 and 14 are spaced from
each other with a portion 16' of the mass 16 between them.


As shown in FIGS. 2nd 3 this yarn 10 is made in an

apparatus having a former 18 constituted by three aligned pairs
20, 22 and 24 of cylindrical rollers which advance a band 26
of slubbing in a direction D. The rollers 20 rotate faster than
the rollers 22 which in turn rotate faster than the rollers 24
so that the slubbing 26 is formed into a thin upright band as
illustrated in FIG. 3. A pair of guides 28 and 30 feed in the
filaments 12 and 14, respectively, to the coI~bining station




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.: ' ` - . . ' '; ~

5~

formed by the rollers 20. FIG. 3 illustrates how these fila-
ments 12 and 14 are fed to opposite sides o~ the band 26
directly across from each other and both lying in a plane per-
pendicular to the plane of the band 26 of the combining
station.


~ n a region 36 between the combining rollers 20 and
an eye 32, the slu'~bing band 26 and filaments 12 and 14 are
spun together and then wound up on a ring-type spinner 34
having a spool 42 that i5 rotated at high speed with the yarn
to be spun passiny through a traveler 40 on a ring 38 surround-
ing the spool 42 as described on pages 376 and 377 of The ~ay
Thinqs Work (Simon and Schuster: 1967).


It is also possible as sho~m in FIG. 4 to feed the
two filaments 12 and 14 to opposite sides of the band 2~ at
rollers 20' at the downstream end of the slubbing shaper
arrangement 18, with the filaments 12 and 14 being positioned
offset rom each other Oll opposite sides of the band 26. This
may be e~fected by forming the rollers 20' with grooves 21 of~-

~et from a plane perpendicular to the band 26. Even with this
system it i9 noted that a portion 16' of the mass 16 in the
finished yarn will al~7ays lie between the two filaments 12 and
14~




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