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Патент USA US2123970

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July 19,, 1938.
_
M. A. SALEMBIER, JR '
2,123,970
METHOD OF THROWING SILK
Filed May 13, 1935
kg
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INVENTO
12,123,970
Patented July 19, I938
- UNITED STATES
PATENT‘ OFFICE
2,123,970
METHOD OF THROWING SILK
Maurice Albert Salembier, Jr., Plandome, N. Y.
Application May 13, 1935, Serial No. 21,079
6 Claims.
This invention relates to a new and improved
method of silk throwing and more particularly
to an improved method of producing a continuous
multiple strand silk thread.
The art of silk throwing includes the steps of
winding, doubling, twisting and usually, coning,
to form a suitable silk thread from raw skein
(01. 117-21)
unknotted strands, and transferring a‘single bob-v
bin of twisted and doubled thread to ?ll a single.
?nal package.
'
.
Further objects and advantages of my inven
tion will appear from’the following description
thereof, taken in conjunction with the attached
drawing which is a diagrammatic elevational
view of certain parts of a throwing machine on _
silk. Of these operations, certain ones, par
ticularly doubling, have been the source of mul- _ which my new process may be carried out.
One of the principal sources of knots common 10
strand knots which are highly objectionable
10 tiple
not only in waste of material and delay in throw
ing, but they are especially objectionable in the
?nal product and its uses.
It is the principal object of my invention to
15 provide an improved method of throwing silk
yarn by which I produce continuous lengths of
silk yarn of multiple strand type having 110
knots common to¢all strands, my method includ
7 ing the step of tying single strand knots in case
20 of breaks or runouts in the separate strands.
Another object of my invention is to provide
an improved method of throwing silk which in
cludes the steps of stopping multiple strand
thread in the doubling machine prior to the
25 point of doubling or twisting, in case of a single
strand break, and tying the single strand to its
appropriate supply without destroying the con
tinuity of, the other strands.
Another object of my invention is to provide an
30 improved method of throwing silk to form a mul
tiple strand thread by winding multiple'strands
from a plurality of separate strand bobbins which
includes the step of stopping the thread between
the creel and point of twist if a strand breaks,
35 tying a single end knot in the broken strand
without drawing the completed thread back off
the receiving bobbin and subsequently uniformly
tensioning and twisting the knotted and un
knotted strands.
A still further object of my invention is to
40
provide an improved method of throwing natural
silk to form a continuous multiple strand, mul
tiple twist thread having uniform texture and
no knots common to all strands in packages of
45 the order of six ounces or larger which comprises
the steps of winding single strand bobbins having
a length approximately equal to the length of the
single strands in the ?nal package, feeding mul
tiple strands from a plurality of such bobbins to
50 a single receiving bobbin to form a. doubled
thread, stopping said feed, if a single strand
breaks, before the broken strand reaches a point
of doubling or twisting, tying a single strand knot
in the broken strand and the ‘single-strand from
55 the winding bobbin, twisting the knotted and
to all strands in a multiple strand thread is in the
step of doubling or forming the multiple strand
thread having two or more strands from a plu
rality of the single strands.
Doubling is not
limited to two strand thread but is used in its
commercial sense of forming multiple strand
thread of any desired number of strands. This
operation is commonly performed on a combined
doubler-twister type of machine which forms and
winds the multiple strands and at the same time
gives the multiple strands a certain predetery
mined twist. Such machines are especially suit
able for throwing silk yarn for hosiery tram as
such product is a multiple strand thread com‘
monly having relatively few turns per lineal inch.
Such machines are also frequently used in the
preliminary steps of forming other threads such
as crepes, etc., which although of a higher twist,
are initially formed into multiple strands on the
doubler-twister type of machine and subsequently
0
given a ?nal twist on a twister.
I have diagrammatically shown parts of a
doubler-twister type of machine to better illus
trate the steps of my improved process of throw
ing silk yarn, although I am not limited to such
machines as my process can be carried out on
any type machine adapted to form multiple strand
thread. In general such machines have a creel or
pin rail I0 which is provided with a number of
pins H to support the desired numberaof single
strand bobbins l2. It is, of course, to be under
stood that different types .of thread require a
different number of strands, hosiery tram, for
example, varying from two to twelve or more
depending on whether used for sheer or service
weight hosiery, and for leg or welt or foot por
tions.
Considering as a special example, throwing of a
four strand, low twist thread, four single end
yarn bobbins I2 are placed on the respective pins 50
4 l and the separate ends a, b, c and d are drawn
through the eyes .of the individual drop arms l4,
and then the separate strands are gathered by
the gathering eye l6. The single thread then
usually passes around certain feed rolls l8 or 55
2
"2,123,970
other tensioning devices, through guide eye l9 -may be accomplished by various different forms
10
and then to the receiver bobbin 2!], through the’
guide ‘eye 22 on the traverse or ring rail 24.
As is well known, the receiving bobbin 20 is
rotated at a desired speed to properly wind the
in case of a broken strand, the receiving bobbin
and feed rolls stop before the point of break
in the strand becomes twisted in other portions
doubled multiple strand thread and the feed rolls
of the thread.
I8 which are driven at a predetermined speed
relative to that at which the receiver bobbins are
As a second step in my improved method of
throwing silk, I then tie a knot such as 28 in
operated act as take up rolls or tension devices.
the broken strand only, so that the llmot is ad
jacent continuous portions of the unbroken
The, feed rolls I8vin this type of machine deter
mine the amount. of tension on the doubled
thread and the relative rate of rotation of the
feed rolls I8 and the receiver bobbin 20 deter
mines the number of twists the thread is given
per inch.
'
-
I do not show in detail'the operation of the
stop mechanism, but it will be understood that
a suitable stop mechanism is placed in operation
to stop the feed rolls I8 and the receiving bobbin
20 20 by the dropping of a drop arm I4 due to run—»
of machinery, it being essential, however, that
-
1
strands and is therefore relatively small in com
parison with a knot common to all strands. In
the subsequent twist generally given the thread
the single strand knot blends in and becomes al
most totally invisible. I ?nd that the single
strand knots will pass practically all knot de
tectors, carriers or needles which will pass the
‘majority of the unknotted thread.
Inasmuch as I stop the thread prior to ‘the
point at which the broken ‘strand becomes twisted
with the unbroken strands, it is unnecessary to
out or exhaustion of the supply on a bobbin I2,
or due to waste or other matter catching in the . draw any wound thread back from the receiv
eyes of the drop arm I4 which breaks a strand. ing bobbin to count ends as formerly required,
It will be clear that a break or run-outin the and it is unnecessary to make any visual inspec
strand will occur between the bobbins on the tion other than merely to join the portions-of
creel or pin rail I0 and the eye of the drop arms the broken strand. A break in one strand will
I4. As illustrative of the operation of my de
be instantly noticeable and with the other strands
vice, I have shown one of the strands a of the
continuous, the mere tying of the broken strand
thread broken and the appropriate drop arm in will in itself be an inspection to show that all
30 stopping position,
ends are present in the'thread.
30
It is necessary in. forming multiple strand
After the knot is tied in the broken strand,
thread to. always have the same number of the spindle is restarted and as the knot is be
strands in the thread at every point as less than tween the single strand bobbins l2 and the feed
the full number of strands would cause a re
rolls I8 the tensioning of the knotted and un
jection of the yarn as totally defective. A lesser knotted strands will be uniform. Uniform ten
number of strands was frequently partially wound
on the receiving bobbin however as the thread
passes so rapidly (receiving bobbins frequently
run 4500 revolutions per minute) that even if the
40 drop eyes operated the usual vstop mechanism,
it would still not prevent some of the lesser num
ber of strands from passing through the guide
eyes and on into the receiving bobbin. It has
sioning improves the elasticity of the thread
which is'of major importance in many products
such as hosiery which require a high elasticity
characteristic.
As a further step in my improved process. I
?ll each receiving bobbin 20‘ with an amount of
continuous doubled thread sufficient to complete
ly ?ll the ?nal package whether it be a cone
been the practice of throwsters to sever all the - or of other type. Coning from bobbins having
45 unbroken strands when one strand ‘broke, the full equivalent amounts of yarn saves a substan 45
operators either breaking all the other strands tial amount of time and eliminates the vusual
by hand, or automatically operated means con
knots and variable tension in the coning of three
nected to the stop motion mechanism were pro
ounce and larger packages. 'I'he'v elimination of
vided to accomplish this result.
Some of the
50 wound thread was then drawn back from the
receiving bobbin until the operator found the
desired number ‘of thread strands after which
a knot common to all strands was tied, the knot
. trimmed, and the trimmings and slack discarded
55 to waste. The thread drawn back from the
bobbin and trimming of the knots'was a source
of considerable waste, and the knot was highly
objectionable.
In accordance'with my improved method of
60
throwing silk and in operating the machinery
used for forming silk thread, I ?nd that I can
eliminate a substantial amount of waste here
tofore occasioned in tying multiple strand knots
and avoid the delay due to drawing of thread
65 back from the receiving bobbin. I also provide a
superior product which has no knots common to
all strands and which is therefore a far superior
product to that heretofore produced. As one
step of my improved method of throwing silk, I
70 stop and incomplete thread between the creel and
the point of twist so that I can tie a single strand
knots is also very important in coning because it
often happens that different bobbins will have
slightly different types of thread as hereinafter
described and. I entirely avoid such difficulties.
Although I am not so limited, I also find it
highly desirable‘ to use single end bobbins hav
ing a‘ continuous single strand equal in length
to the single strands of the desired ?nal pack 55
age. By this I mean that I provide a single end
bobbin which will not run out in forming the de
sired receiving bobbin. 20 of the double thread.
I also use bobbins in the other machines includ
ing twisters, etc., which will hold the entire sup
ply for the ?nished package. Although this has
been practiced to some extent in making smaller
packages of silk, it has been customary in making
packages of three ounces and over and especially,
the eight ounce package to use the customary
small bobbins which required joining different
lots of thread. I avoid this entirely by forming a
continuous strand of twenty thousand yards or
more in which some thread strands are continu
ous at every point.
,
knot without untwisting or drawing the thread.
Tying of single strand knots makes it unnec
back from the bobbin. As shown in the drawing, essary to carry out the usual redraw operation .
this region of separated strands is generally indi
which was commonly required for inspection,
75 cated at 25. Stopping the thread in this space cleaning and elimination of hidden knots. In
60
3
2,123,970
from different bobbins is entirely eliminated. I
addition, spool for spool transfers of large pack
age quantities from doubler-twister to twisting
machines and from the twisting machinesto the
coning machine is especially bene?cial with high
twist threads such as crepe, inasmuch as there
can be no slack twist which formerly required the
loss of several yards of material at each knot.
With single strand knots the twist is continuous
and redrawing being eliminated there is a much
higher percentage of thread available for coming
or other packaging.
Ordinarily there is no other knot or break at
the same point, although it is to be understood
that single end bobbins usually carry yarn which
also avoid hidden knots in the coning operation
and .prevent unravelling or catching of thread
bunches due to knots accidentally occurring on
the side of the cone which commonly causes con
siderable di?iculty in the using machine during
knitting, weaving, etc.
I have referred to my method of throwing as re
lating to silk and I mean by that, natural silk which
is well known to be a relatively small size ?ber al
10
though varying in denier, such silk being elastic,
relatively strong and commonly formed into amul
tiple strand thread to form a suitable product.
There are other ?bers, however, such as arti?cial
silk, to which my invention is applicable where 15
is possible that a winding knot, for example, may such ?bers have similar characteristics of elas
occur at a point adjacent a new break during I ticity, strength, sizeand necessity of doubling.
While I have described a preferred form of
the doubling operation. While I prefer not to‘
tie other than single thread knots, I find that if embodiment of my invention, I am aware that
20
has been knotted in one or more places, and it
20 not more than two-thirds of the strands of four
strand thread or greater are tied together at‘any
' one point, this may not be objectionable from the
standpoint of future use of the double thread.
In a four strand thread, for example, I have
25 tied a knot common to two strands and in a ?ve
strand thread, I have tied a knot common to as
many as three strands without objection. Tying
more than this frequently causes subsequent di?i
culty and is to be avoided.
30
.
I ?nd that my improved method of silk throw
ing saves a very substantial amount of the total
throwing costs, reduces labor and machine costs
and brings about a very substantial saving in
waste.
Inasmuch as I tie a knot in a single
strand‘only, there is a saving of at least three
fourths that heretofore 10st in tying knots com
mon to all strands in a four strand thread and
there are other savings in time and material by
not drawing thread back from the receiving bob
40 bin.
The gross saving in waste alone can be re
duced more than one-half by my method. of tying
knots which represents a very substantial ad'
vantage.
'
.
'
A multiple strand thread having no knots com
mon to all strands is a premium product and
highly desired by the using trade. For hosiery
tram, it is particularly satisfactory in that as
there are no knots common to all strands, press
o?s due to the knots catching in the needle or
carrier or untying are eliminated, and the ?nal.
product _has none of the knots which were for
other modi?cations may be made thereto and I
therefore desire a broad interpretation of my in
vention within the scope and spirit of the de
scription herein and of the claims appended
hereinafter.
I claim:
»
—
25
l. The method of producing a natural silk yar
having a continuous length of at least twenty
thousand yards which comprises the step of wind
ing a continuous length of a single strand of at
least twenty thousand yards, subsequently form 30
ing multiple strands on a spool adapted to con
tain twenty thousand yards of the multiple strand
thread, and tying single strand knots atv single
strand breaks prior to the formation of the mul
. tiple strand thread.
2. The method of producing a continuous twist
ed multiple strand thread having a length of at
least twenty thousand yards, of smooth texture
and having no knots common to all strands which
comprises winding a-plurality of single strands 40
of at'least twenty thousand yards, doubling said
strands, tying breaks in single strands independ
‘ ently of other strands, twisting the tied and con
tinuous strands, winding a single bobbin with a
continuous thread of the desired length, subse 45
quently setting the twist in said thread and ?nally
making a complete spool for spool transfer of
said thread to form a final package.
3. The method of making a continuous multi
ple strand natural silk organzine yarn of a 50
length equivalent to an. eight ounce mass and
merly so conspicuous as to cause, rejects and having in the range of two to twelve strands of
reclassi?cation. My larger ‘package product ' ten to twenty denier which includes the simul
available by my improved'method of throwing is taneous doubling and twisting of a plurality of
also especially suitable for hosiery tram as an
silk strands into a single yarn on a doubler
eight ounce package will make approximately one
dozen ‘pairs of hosiery leg portions, depending on
the denier and strands of the thread and with
twister machine, tying single strand knots in a
no common knots, I can eliminate the losses due
60 to the three or four knots which formerly existed
in this size package.
‘
Furthermore, having no knots common to all
strands there is no opportunity of joining mis
mated threads. As is well known, threads of
the same denier size classi?cation are not uni
form in diameter and the variation is such that
in certain woven cloths as well as in some knitted
products the change ‘in tint, diameter and na
ture maybe very conspicuous ‘and highly objec
tionable. This is especially noticeable during
subsequent dyeing. There is no point in, my
thread at which there is less than one contin
uous strand and preferably only one strand is
knotted at any one point so that any di?iculty
due to the possible variation in joining threads
55
broken strand in case of a break or run-out,
uniformly tensioning the broken and unbroken
strands, subsequently uniformly ,twisting the
multiple strand yarn from end to end after the
single. strand‘knots have been tied and ?nally
setting the twist of the yarn.
4. The method of producing a natural silk
‘yarn having a continuous length of at ‘least
twenty thousand yards which comprises the step
of winding a plurality of continuous lengths of
single strands of at least twenty thousand yards,
subsequently doubling and twisting said single
strands and winding said strands on a spool
adapted to contain twenty thousand yards of the 70
multiple strand thread, tying single strand knots
during the doubling-twistingoperation at single
strand breaks, and subsequently making com
plete spool for spool transfer of the yarn in
further throwing steps.
75
4 V
2,123,970
5. The method of making multiple strand
yarn to a package containing the entire spool of
natural silk yarn equivalent in length to a weight
twisted yarn.
of six or more ounces, which comprises winding a
6. The method of throwing natural silk which
comprises feeding from each of a plurality of
single end bobbins, a single strand equal in
plurality of continuous lengths of single strands
of natural silk equivalent to the length of strands
in the ?nally desired ‘package, subsequently
length to the strand of the ?nal package, tying
doubling and twisting said single strands on a
single strand knots at a break or run-out to
doubler-twister machine, tying single strand > maintain the continuity and independence of the
knots in said separate strands in case of a break. strand, twisting the knotted and unknotted
10 or run-out, winding said multiple strand yarn on
strands under uniform tension, winding the
a single spool adapted to contain all of the yarn twisted and doubled thread on a receiving bobbin
of the ?nal package, transferring said yarn com
and subsequently forming a full package from
pletely from one spool to another in a twisting thesingle receiving bobbin in spool for spool
machine and twisting said yarn during the trans
and subsequently packaging said twisted
yarn by completely transferring the twisted
transfer.
.
15 fer
MAURICE A. SALEMIBIER, JR.
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