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O'lf- 29, 1946.
R. J. DE LAu'rHAuwEl-a
Filed March 15, 1944
Page Jofel@ £15afg/w51:
' MM,
Patented Oct. 29, 1946
2,410,020 '
~ :UNITED STATES Plrriz‘lvrv
Rene J. de‘Lathauwer, Hawthorne, N. J,
l Application March 15, 1944, serial No. 526,580N
2 claims. (ci. 19-130)
In the treatment of wool fibers to produce a
or less cross-sectionally round and condensed
_the fibers aremade subject to drawings in a suc
cession of drawing machines, usually seven or
more. In the first several machines, as the ñrst
three or four, a gill-bed, and in the remaining
state. Following the condensing the sliver,>or
what as it now exists is known as a roving in this
particular art, is formed into a wound mass, ason
a suitably rotated roll or core, and thus "bal1ed”
machines, a porcupine roll, is employed between
the feed or retaining .rolls and the delivery or
drawing rolls, each such expedient being active,
while made toadvance at a speed between those 10
-of the corresponding Vfeed and delivery rolls, to
to each other, thus developing the` sliver to more
usliver in condition for spinning into worsted yarn
in preparation to undergo again these steps in
the next succeeding drawing operation or, the
last drawing being completed, to pass to the spin
ning operation.
The object‘of the present invention is -to pro
duce a sliver product, or roving, in condition ,for
effect what I herein term a slip-draft combing, or
-to hold back those fibers that are not actually
spinning into worsted yarn .which shall be sub
y_nipped by the delivery rolls and that would other
wise, as an incident merely of friction existing 15 stantially as completely and evenly or uniformly
drafted'as by the conventional procedure but to
between them and the ñbers actually so nipped,
so in a way to reduce the equipment necessary
be advanced by and with the latter ñbers, thus to
and obtain a considerable saving in power, time
defeat the purpose of the drawing operation or
and labor.`
`the eiïecting of as uniform lengthwise dispersion
To this end, instead of passing the material
of all the fibers as possible. Incidentally, as is
through the` seven or more stages indicated in
well known to workers in this art, the sliver can
order finally to produce a roving suitable for spin
withstand andrequiresI a more strenuous slip
ning into worsted yarn, I proceed as follows: Each
,draft combing in the early part of the whole
of at least two slivers is subjected, while being
treatment than in the later part thereof where it
approaches or actually attains a quite frail con 25 continuously advanced, ñrst to simultaneous
drawing and slip-draft combing and thereafter
dition, wherefore well known expedients are used,
to drawing and slip-draft combing of which vthe
that is, gill-beds, with their closely related and
former combing is more strenuous than the latter
numerous pins or gills, are used in the early part
_and meanwhile the intake speed of the second
`,of the whole treatment and porcupine rolls, with
drawing is preserved substantially equal to the
,more widely spaced and less numerous pins or
speed of the ñrst drawing, whereupon the
quills,` are used in the later part; and these two
thus-treated sliver is condensed and packaged;
expedie'nts diiïer in other respects affecting the
thereupon the thus-treated slivers are combined
disposition of their pins. In respect to any one
to form a doubled sliver and such doubled sliver
`of the several drawings the conditions are as fol
is subjected to the same treatment as each sliver
lows: At least two separately formed slivers, each
has undergone inclusive of at least the condensing
a more 0r less initially cross-sectionally round or
thereof, thus to produce a roving in condition, at
other Vthan flat strand, doubled (that is, lying
`least as to draft and condensation, to pass to the
side by side and in close contact with each other),
spinning operation, though usually following such
pass between the feed rolls and the delivery rolls, Y
being meanwhile subjected to the slip-draft 40 -condensing and Vduring the advance of the dou
bled sliver it will also be packaged. Whetheiuor
combing action of the gill-bed or the vporcupine
,not the `ñrst-named slivers are simultaneously
-roll, as the case may be, whereby they come to
treated is of course immaterial. Further, each of
exist blended and merged into what is a unit or
such ñrst-named slivers will in practice usually,
>single sliver considerably greater in length than
either, and of `less weight per unit of length than 45 itself, comprise two or more sliver-components, as
I herein term them. Preferably »in each stage
the combined weight, of its component slivers,
Y(to wit, in which each of the first-named slivers
fhaving become more or less'flattened in the proc
is treated, and in which the doubled sliver is
ess. Following each gill-drawing operation such
treated) blending of the ñbers by transversely
>s_liver is next subjected to a false-twisting oper
compacting them is eifected. , By following this
ation eiîectedïby a back-and-forth rotated fun
nel, and following each porcupine-roll drawing
_operation the sliver is next subjected to a rolling
operation effected by a pair of endless aprons
which are advanced with the sliver and also re
uciprocated transversely thereof and oppositely
procedure thenurnber of drawings is reduced to
four each, instead of seven ormore, and the con
densings and packagings or ballings are reduced
"to two each. insteadof sevenor more, with a con
sequent considerable economy in equipment, 1a
,bor, V'time and power.` `
In the annexed drawing, both views appearing
being diagrammatic,
Fig. 1 is a side elevation of the improved sys
tem; and
Fig. 2 a plan of the lower elements shown in
Fig. 1, with the slivers appearing in broken out
At I-Ia, are the feed rolls and at 2-2a-2b
are the delivery rolls for the ñrstdrawing >opera
tion of the first stage. So as to exert pressure on 10
the slivers roll I rests as usual on roll Ia and
roll 2 on the pair of rolls Zar-2b. Between the
feed rolls and the delivery rolls is any usual type y '
of gill-bed 3 used in wool drawing. Each of the „
rolls Ia and 2a--2b is the positively driven rollof its group, roll I being driven from roll Ia andv
roll 2 from roll 2a-2b by traction.
Aft of the delivery rolls are fixed chutes or
tunnels :c each of which narrows and so compacts
in any event each of the four masses of fibers
here shown exists as what I shall hereinafter,
in this description and in the appended claims,
term a “sliven” Such sliver, attenuated by the
gills and thereupon reduced in width by funnel .'v,
and with its fibers more or less blended, is de
livered by the delivery rolls 2--2a-2b to the
feed rolls 4-4a of the second drawing means,
to wit, in neutral state in transit from rolls
2-2a--2b to rolls 4-4a insofar as draft or lack
of draft is concerned because the rolls 2-2a-2b
and A-lia rotate at the same peripheral speed.
The sliver, here by the porcupine roll attenuated,
‘ and again reduced in width by funnel y, and
with its fibers still more blended, is then subjected
to the rolling and hence condensing action of
- the aprons and ñnally is balled at I2-l3, for
this latter purpose being delivered, as usual, via
a spout I4 to the balling means with a neighbor
the ñber mass presented to it transversely, they 20 ing _roving that has been produced in the same
discharging close to the nips of the feed rolls next
way' ‘This
as completes
' the first stage as ‘ ity will
to`be referred t0.
At 4-4a are the feed rolls and at E--Sa-Eb
are the» delivery rolls for the second drawing op
eration of the first stage. So asv tc exert pres
sure on the slivers roll‘d rests on roll 4a and roll
erably be> practiced in performance of my inven
tion. To complete the treatment to produce a
roving in the state required for spinning the
product, or thus treated sliver, of the first stage
is made to undergo again the same operations as
in said ñrst stage, that is to say, when combined
with a sliver that has been treated in the same
-roll 6 resting on roll 6a so as to exert pressure on
the slivers but being as usual in offset relation 30 way and so as to form therewith what I `term
in the appended claims a “doubled sliver.”
'thereto in the direction of> advance of the sliver.
5" on the pair of rolls 5a--_5b. Between these feed
rollsI and delivery rolls is the pair of rolls 6-6a,
Between rolls Iì--Ba and the delivery rolls is the
porcupine roll 1. Rolls 4a, 5a and 5b, roll 6a and
Of course, according to my treatment, aswell
as in the case of the conventional treatment
hereinbefore set forth, the more strenuous pri
rnary slip-draft combing action, as by the gills,
is necessary andpossible because of the greater
>onA which they respectively rest.
stability and cruder character of the slivers, and
Aft of delivery rolls 5-5a-5b are fixed chutes
the less strenuous secondary slip-draft combing
or funnels y which narrow the sliver transversely,
action, as by the porcupine roll, is necessary and
discharging lclose to condensing means thus:
'I‘heV condensing means consists of a lower pair 40 possible because of the then reduced stability and
more refined character of the slivers. But my
of: rolls 8, embraced by an endless apron 9, and
invention involves` providing for two successive
three upperv rolls I0, embraced by an endless
the porcupine roll 1 arev positively driven, rolls 4,
5' and 6 being driven by traction from the rolls
drawing operations respectively accompaniedV by
apron I I, the lower apron having its upper stretch
combings of which the one appertaln'
lhorizontal and the upper rolls being of such
ing to the first drawing is more strenuous than
relative diameters and so arranged that the up
that appertaining to the second drawing and in
per apron coacts with the lower apron to roll
further rotating the feed rolls for the second such
>and thus condense the slivers passed between
operation at the same peripheral speed as that I
them when the aprons are subjected to recipro
of the delivery rolls of the first, or,` inother`
cation transversely of the slivers and reversely
50 words, entering the slivers to the second drawing
toeach other in the well known manner.
at an input speed which is equal to the output
To thev right or aft of the condensing means
speed of the first drawing. If. that is done,` thus
is the balling means comprising a lower roll I2
aIîording one stage in the whole treatment,~ and
and a roll I3 resting thereon and on which the
such is then repeated, thus to afford the second
-winding orA balling is effected.` Roll I2 is posi
55 stage, there need be only four drawings, with
tively driven. ’
driven in the same direction, or here so that the
their four slip-draftcombings, two condensings
and two ballings, and, as practice has shown,
-slivers. are advanced to the right.
Roll 2a is driven at a faster speed than roll
that produced by the conventional procedure.
‘ fRoilsv Ia, 2a, 2b, 4a, 6a, 1, 5a, 8 and I2-are all
the >resulting product is as> goed in quality as
The condensing and packaging are herein
-In so as to effect the first drawing, and rolls 60
and described as effected after .the man
.5a-_5b are driven at a faster speed than roll 4a
ner of what` is known` as the “French” method
se as to effect the second drawing. And of course
of treating, wool fibers in preparation for spin
rolls 8 and I2 are driven at at least a speed not
less -than that imparted to the slivers as delivered
by' thesecond drawing means, thus to perform
_theirintended functions of condensing and _ball
ning; but it is to be understood that my inven
tion is not correspondingly limited, inasmuch as
those steps could obviously be performed- in ac
cordance with what is known as the “Bradford”
method of‘treating wool übers in preparation for
But feed roll- 4a of the second drawing means is
spinning, to wit, by resort to fliers and bobbins
driven yat the same peripheral speed as the de
70 by, which the slivers would be more or less twisted
livery rolls 2a-2b of the first drawing means.
and in that state. wound on bobbins or spools.
In Fig. 2 four pairs of sliver-components, as
Having thus fully described my invention, what
a-a in each pair, are shown by way of example.
I claim is:
Those of each pair exist side by side and in con
l. The method `of drawingA wool ñbers.- to pro.
tact with each other, as usual, on entering the
first drawing means and in that sense doubled;
duce ’a roving in condition for spinning ' into
worsted yarn which consists in subjecting each
of at least two slivers comprising such fibers,
and while continuously advancing such sliver,
first to simultaneous drawing and slip-draft
combing such as by gilling and thereafter to
simultaneous drawing and slip-draft combing
such as by the use of porcupine rolls of which
the former combing is more strenuous than the
latter and meanwhile maintaining the intake
speed of the second drawing substantially equal
to the output speed of the first drawing, there
upon condensing and packaging the thus-treated
sliver, and thereafter Combining said thus-treated
slivers to form a doubled sliver and subjecting
former combing is more strenuous than the lat
ter and meanwhile maintaining the input speed
of the second drawing substantially equal to the
output speed of the first drawing of such doubled
sliver, and ñnally condensing the thus-treated
doubled sliver.'
2. The method set forth in claim 1 character
ized by coinpacting transversely the iibers of the
first-named sliver between the two first-named
drawings and slip-draft combings and also be
tween tne latter drawing and slip-draft combing
and condensing of such sliver, and compacting
transversely the ñbers of said doubled sliver be
tween the two drawings and slip-draft combings
such doubled sliver, while continuously advancing 15 hereof and also between the latter drawing and
the same, first to simultaneous drawing and slip
draft combing and thereafter to simultaneous
drawing and slip-draft combing of which the
slip-draft combing and condensing of such dou
bled sliver.
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