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Патент USA US2112938

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' April-5, 193s.v
2,112,938‘
W. I. TAYLOR
CONVERSION OF CONTINUOUS FILAMENTS INTOYARN CONTAINING ‘STAPLE FIBER
Filed Mar‘ch 3, 1936
y
ATAYwRQH ATTORNEYS '
Patented Apr. 55, 193
’' sr'rs rATENr ,o'FFl€E"7..- f
2,112,938
CONVERSION
CONTINUOUS FILAMENTS
INTO YARN CONTAINING STAPLE FIBER ,
_ William Ivan Taylor, Spondon, near Derby, Eng
land, ‘assignor _ to
Celanese
Corporation
of
America, a corporation of Delaware
_ I
,
Application March a, 1936, Serial No. 66,86’!
InGreat Britain March 6, 1935 ._
9 Claims. (Ci. 19-9-1)
This invention relates to a_ method and ap
paratus for the conversion of continuous ?la
ments directly into yarn containing staple ?ber.
According to the invention, a bundle of ?la
5 'ments is caused to passbetween a'positively
driven surface, e. g. a roller moving in the same.
Other factors governing the nature vof. the ,
?nalv product, which factors may be varied as _
required, are the nature of the cutting surface,
the speed of progression of the ?lament bundle
through the apparatus, the difference between the '
speed of the surface or surfaces and the ?la- '
which, together-with the ?rst surface, makes
ments, the ?neness of the individual ?laments in
the bundle, and the amount of twist in the bundle.
The cutting surface may be of an abrasive
10 pressure contact‘ on the bundle in its length, the
nature, e.’ g. a roller surfaced with or made of
second surface being driven by the positively
‘driven surface but caused to rotate at a lower
abrasive material. It is, however, advantageous
to employ a ‘cutting roller provided with'?ne
sharp-edged. ?utes running either helically or
' general direction as the ?laments, at the same -
or at a di?erent speed, and a second surface
' speéd by means of a brake acting on a braking
surface in connection with or forming part of
15 the second. surface. At least one of the two
surfaces has a cutting actionso that by reason
‘ of the passage of the ?laments between the sur- ‘
faces and the di?erent speeds of the surfaces
?laments in the bundle are transformed into
20 staple ?bers and the ?laments leave the surfaces
as a yarn containing staple ?ber.
The operation of converting continuous ?la
ments in the bundle into staple ?bers as de
scribed above does not substantially a?ect the
25 degree of twist which the bundle may possess.
However, when the bundle has little or no twist,
the product should be collected, after the, con
version of the ?laments into staple ?bers, by
a twisting and winding operation to impart to it
30 a twist, which may be the amount of twist re-_
substantially parallel to the axis of the roller, a
roller of this type providing for greater control 15
over the p?iperties of the ?nal product.
Both
both surfaces may consist of ?uted cutting roll
ers, the ?utes running in such directions as to
cross each other'at the point of contact between.
the rollers. One roller,'however, may have av
plain surface,
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It is advantageous to allow the weight of one
of the, rollers to provide the necessary light pres-
venien’t to provide that the positively driven 25
member is a ‘cutting roller rotating on a-?xed
axis, while the other roller, whether 'provided
with a cutting ‘surface pr with a smooth non
cutting‘ periphery, rides on ‘the positively ‘driven 3o
roller so as to provide apredetermined pressure
augmented by further twisting. In either case,
between the rollers.
the coherence of the product. Alternatively, the
35 coherence may be maintained by reason of a
substantial initial degree of twist in the continu
ous ?lament bundle, which twist, as previously
stated, is practically unaffected by the conversion.
In all cases the difference of speed between the
40 two surfaces which are pressed together should
4 . _'
sure between the surfaces. It' is generally con; -
quired in the ?nal product, or may need to be
‘ the twist so imparted during winding maintains
'_
surfaces may have a cutting-action, for example’ I
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‘
The invention is'applicable to the treatment
of different kinds of continuous ?laments, e.- g.
cellulose derivative ?laments such as cellulose
acetate ?laments, cellulosic' ?laments such as
viscose ?laments, and'natural silk ?laments.
By way of example some forms of apparatus
according to the present-invention will now be
described in greater detail withreference to the 40
be adjusted in accordance with the nature ‘of accompanying drawing in which
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the material under treatment and the character
Fig.1 is a side ‘elevation of an apparatus for
istics desired in the ?nal product. The apparatus converting a bundle of continuous'?laments into
for carrying out the invention may be so de
a spun yarn containing staple fiber and
45 signed as to permit the necessary adjustment of
'Figs. 2 .to 6 show alternative forms. of the 45
speed to be effected while allowing substantially ‘ braking means according to ‘the present inven-
independent control of the pressure exerted be
tion applied .to Fig. l.
'
tween the surfaces to be maintained. Even, how
- Referring vto Fig. 1 the apparatus comprises
ever, if the braking means according to'the in - generally two pairs of rollers I, 2, 3, 4, the rollers
50' vention is such as to produce. an effect ,upon l and 3 being mounted on positively driven shafts 5o
the pressure exerted between the surfaces,fsuch 5 and 6 while therollers 2 and 4 are carried on
.effect can be readily taken into account in allow
a bracket ‘I suspended from a stationary shaft 8
ing for the use vof greater or less pressure where above. the rollers. The roller 2 is - carried" in
necessary, as with the treatment of bundles of slotted. bearings 9 in a member l0 secured to
55 greater or less denier.
'
’
the bracket ‘I by means of a nut and bolt H “
2
2,112,938
passing through a slot |2 in the bracket 1 so
that the position of the member ID may be ad
justed vertically. The roller 4 is mounted in
bearings carried in a slot l3 in the lower end
of the bracket 1.
Yarn l4 consisting of continuous ?laments is
supplied horizontally to the upper pair of rollers
|, 2 and passing over the roller | proceeds down
wards to the rollers 3, 4. The roller 3 is grooved,
so that it grips the ?laments with the aid of the
roller 4, and is driven at a higher speed than the
roller I. In consequence the bundle of continu
ous ?laments is caused to slip over the surface
15
of the roller |. The rollerv |_is provided with
?utes making sharp edges with the surface of the
roller, so that the roller I exerts-a cutting action
on the ?laments and converts the bundle of con
tinuous ?laments I4 into a continuous bundle of
frictional engagement is made with the roller 2
by means of a presser member 43 carrying
weights 44 mounted on pegs 45 thereon. The
member 43 is held in position over the roller 2
by means of wings 45 extending outside the bear
ing 9 and held in position thereby. In each of
these cases the pressure between the roller 2
and the roller | is equal to the combined weights
of the roller 2 and of the loading carried thereby
for the purposes of the present invention, and 10
this fact must be taken into account when ad
justing the pressure between the two rollers.
Similar allowance must be made in the case of
the apparatus shown in Fig. 6.
In'this appa
ratus the roller 2 is engaged by means of a roller 15
41 carried upon a lever 48 pivoted at 49 on an
extension 58 of the member Ill. The free end of
the lever 48 is loaded with a weight 5| which may
be set at any of the notches 52 in the upper side
staple ?bers‘ I5. This bundle proceeds down
of the lever so as to adjust the pressure between 20
20 wards to the guide l6 of a cap-spinning device I‘!
by means of which it is twisted and spun into X the roller 41 and the roller 2. The rotation of the
a staple ?ber yarn and wound on the package roller 41 is checked by means of a spring 53 bear
ing against it, the pressure between the spring
l8 which is driven by means of the band IS.
The weight of the roller 2 rests upon the roller 53 and- the roller 41 being adjusted by means of
25 l, a clearance 20 being provided at the bottom . a screw 54 carried in a bracket 55 on the upper 25
of the slotted bearing 9. The roller 2 is, thus side of the lever 48. By these means the roller
driven by frictional engagement with the roller. 41 is caused to rotate at the same peripheral
| and would, if not prevented, rotate at the same
speed as the roller |. In order to cause the roller
30 2 to rotate at a lower speed than the roller I the
roller 2 is provided with a brake drum 2| round
WhiCil passes a cord 22 secured at one end at 23
to the member ID and passing over a small pulley
24 carried on the member ID. The free end of
the cord 2| is loaded with a weight 25. The fric
tion between the drum 2| and the cord 22 checks
the roller 2 and causes it to rotate at a lower
peripheral speed than the roller I.
Since the
run of the cord 22 from the point 23 to the drum
40 2|v and from the drum 2i to the pulley. 24 is
substantially horizontal the action of the cord
upon the drum does not add to the pressure be
tween the roller 2 and the roller |, this pres
sure being independently adjusted by any suit
able means such as weights placed in suitable
cavities in'the roller 2 and being free to act upon
the roller l by reason of the clearance‘28.
speed as the roller 2 and rubbing engagement
with the roller 2 is avoided. At the same time
the force which the roller 2 has to apply to 30
rotate the roller 41 against the friction action of
the spring 53 checks the'roller 2 and causes it to
rotate at a lower speed than the roller I.
Having described my invention what I desire
to secure by Letters Patent is:'
35
1. Process for the production from a bundle of
continuous ?laments of a ‘continuous product
containing staple ?bers, said process comprising V
passing a bundle of continuous ?laments between
two cylindrical surfaces, causing said cylindrical 40'
surfaces to press together so as to exert pressure
on said bundle, positively driving one of said sur
faces, permitting the other of said surfaces to
be driven by said positivelyv driven surface, and
applying a force to said other surface so as to
cause it to rotate at a lower peripheral speed
than said positively driven surface, one at least
In Fig. 2 a similar braking effect is achieved by , of said cylindrical surfaces being a cutting sur
means of two springs 26, 21 secured to faces 28, 28
on the member ID by means of screws 30. The
pressure of each of the springs 26, 21 upon the
surface of the friction drum 2| is adjustable by
means of a screw 3| provided with a knurled head
32 and a lock nut 33. Here again the pressure of
55 each of the springs upon the drum 2| is substan
tially horizontal so that the pressure between
the roller 2 and the roller | is not affected by
them. In Fig. 3- the drum 2| is acted upon by a
brake shoe 35 mounted on a lever 36 which is
60 pivoted at 31 to the member l0. Attached to the
lever 36 is a lever 38 carrying a weight 39 at
‘its free end by means of which the brake shoe
35 is pressed against the brake drum 2|.
In Figs. 4 and 5 braking means for the roller
65 2 are shown which directly affect the pressure
between the roller 2 and the roller |. In Fig. 4
the roller 2 is carried upon a spindle 48 against
‘ which bears a suitably shaped weight 4|, so as to
make frictional engagement therewith, and to
face so that by reason of the passage of the ?la
ments between the surfaces and the different
speeds of the surfaces the ?laments in the bundle
are transformed into staple ?ber.
2. Process according to claim 1 wherein the
‘force applied is a frictional force.
3. Apparatus for the production from a bundle 55
of continuous ?laments of a continuous product
containing staple ?bers, said apparatus compris
ing a pair of rollers, one at least of said rollers
having a cutting surface, means for drawing a
bundle of continuous ?laments through said pair 60
of rollers, means for pressing said rollers to
gether so as to exert a pressure upon ‘the bundle
of ?laments passing between them, means for
positively driving one of said rollers, and means
for applying a braking force to the other of said 65
rollers so as to cause it to rotate at a lower periph
eral speed than said positively driven roller.
4. Apparatus for the production from a‘bun
meet-continuous ?laments of a continuous prod
uct containing staple ?bers, said apparatus com
70
70 check the speed of the roller 2. Additional
weights 42 are added above the weight 4| to . prising a pair of rollers, one at least of said roll
bring up the total weight to any desired amount. ers having a cutting surface, means for drawing
The weights 4|, 42 are H shaped in plan so a bundle of continuous ?laments through said
that they may be dropped into the slotted bear
In Fig. 5
75 ing 9 and be held in position there.
pair of rollers, means for pressing said rollers
together so as to exert a pressure upon the bundle 75
2,112,938
of ?laments passing between them, means for
positively driving'one of said rollers, a braking
surface secured to the other of said rollers, and
means for applying a frictional force to said
braking surface so as to cause said other roller
to rotate at a lower peripheral speed than said
positively driven roller.
\
3
ing a pair of rollers, one at least of said rollers
having a cutting surface, means for drawing a
bundle of continuous ?laments through said pair
of rollers, means for pressing said rollers together
so as to exert a pressure upon the bundle of ?la
' ments passing between them, means for‘positively ‘
5. Apparatus for the production from a bundle
driving one of said rollers, ,a braking surface se
cured to the other of said rollers, a pivotally
of continuous ?laments of a continuous vproduct
mounted shoe adapted to - bear against ‘said
containing staple ?bers, said apparatus compris
braking surface, in a direction substantially at
ing a pair of rollers, one at least of said rollers
having a cutting surface, means for drawing a
right angles to the pressure between said rollers
bundle of continuous ?laments through said pair
of rollers, means for pressing said rollers to
adapted to force said shoe against said braking
15 gether so as to exert a pressure upon the bundle
of ?laments passing between them, means for
positively driving one of said rollers, a braking
surface attached to the other of said rollers, and
a weight adapted to apply a force to said'braking
20 surface so as to cause said other roller to rotate at
a lower peripheral speed than said positively
driven roller.
, .'
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6. Apparatus for the production from a bun
dle of continuous ?laments of a continuous prod
so as not to affect said pressure, and a weight
surface so as to cause said other roller to rotate ‘
at a lower peripheral speed thansaid positively
driven roller.
'
8. Apparatus for the production from a bundle '
of continuous ?laments of ascontinuous product
containing staple ?bers, said apparatus compris
ing a pair of.rollers, one at least of said rollers ‘
having a cutting surface, means for drawing a
bundle of continuous ?laments through said pair
of rollers, means for pressing said rollers together
so as to exert a pressure upon the bundle of ?la
ers having a cutting surface, means for drawing
a bundle of continuous ?laments ‘through said
ments passing between them, means for positively
driving one of said rollers, a weight adapted to
bear against the surface of the other of said
rollers and make frictional engagement there
pair of rollers, means for pressing said rollers
with so as to cause said other roller to rotate at
together so as to exert a pressure upon the bun
a lower peripheral speed than said positively
_ uct containing staple ?bers, said apparatus com
prising a pair of rollers, one at least of said roll
dle of ?laments passing between them, means for
positively driving one of said rollers, a braking
driven roller.
,
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_
9. Apparatus vfor the production from a bun
' surface secured to the other of said rollers, a' ?ex_-. dle of continuous ?laments of a continuous prod
ible cord adapted to pass round said braking . uct containing staple ?bers, said apparatus com
surface, guide means adapted to conduct said prising a pair of rollers, one at least of said
cord to and from said surface in a direction sub
rollers having a cutting surface, means for press
stantially perpendicular to the pressure between _ ing said rollers together so as to exert a pressure .
said rollers so as not to affect said pressure, and upon the bundle of ?laments passing between
a weight upon said cord adapted to draw it into them, means, for positively driving one of said
40 frictional engagement with said braking surface rollers, a further roller adapted to bear against so as tocause said other roller to. rotate at a ‘and be driven by the other of said rollers, and
lower peripheral speed than said positively driven means for applying a frictional force to said fur
ther roller, said force being transmitted to said
7. Apparatus for the production from a bundle other roller so as to cause it to rotate at a lower
of continuous ?laments of a continuous product peripheral speed than said positively drivenroller. 46
containing staple ?bers, said apparatus compris
WILLIAM IVAN TAYLOR.
roller.
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