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Патент USA US2271357

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Jan. 27, 1942-.
‘a. VON wYss ETAL
Filed May 28, 1940
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GROCD eaes JVOCLW” 8“Wig“;I
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Passed Jan. 27, .1942
raoca'ss or raonncme men-sworn
srnaron-srnmme moonss '
Georg yon Wyss, Gonanor-Buccione, and Ferdi
nando Bii? and Piero Franchetti, Gozzano,
Italy, and Erich Sellner and Alexander Lucit
tenberg, Wuppertai-Barmen, Germany, assign
on: to American Bemberg Corporation,
York, N. Y., a corporation of Delaware
Applicagrn May 28, 1940, Serial No. 337,722
Germany January 9, 1939
2 Claims.
This invention relates to improvements in
methods for producing high strength arti?cial
silk from cuprammonium cellulose solutions by
the funnel stretch-spinning process.
vIt is an object of the invention to provide
means for practising the aforesaid method and
comprising agencies and combinations thereof for
(or. 18-64)
(e. g. especially in the viscose industry) has been
entirely eliminated for well known reasons.
Cuprammonium yarns. made by the stretch
spinning process can also be produced by the
pot-spinning process and the latter would always
be preferred if it were not for the fact that the
sensitive machines used are attacked by the cop
chemically treating, washing, and spooling the
per-laden sulphuric acid to a far greater extent
silk produced.
than in other cases. In accordance with the pres
To‘ this end the invention contemplates the use 10 ent inventionhowever an improved silk spooling
of a series of steps and an apparatus layout
whereby the silk as produced in the spinning de
vice in the form of single threads, ?bres, ‘or ob- ,
_ method is provided which is used conjointly with
themselves during the positioning of the layers
. The thread thus stretched and freed from copper
as they are applied thereto, thus producing-irreg
ularities in the threads under certain circum
stances and inviting the danger of damaging the
and which may still contain acid,’ is‘, contrary to
usual previous practice, not conducted directly to
an improved silk treating process. This spooling
method and especially the device used therefor
tained by ‘combining these into bundlesbstrands.
'has been but little employed in connection with
skeins or other groups, is subjected to stretching, 15 silk made by the funnel stretch-spinning process
to treatment adapted to remove copper, and to
but it has been found possible in accordance ‘with
washing, after which it is spooled on special
the present invention to develop a special embodi
spooling devices adapted to permitafter-treat
ment and improvement of said method which is
ment of the thus produced high strength yarn.
adapted to make it possible to apply it to the pro
It is a further object of the invention to pro
duction of high strength silk. In accordance with
vide a novel spooling device for receiving the
the invention the entire amount of thread, ?bre,
high strength yarn produced by the aforesaid
?lament or the like can be produced as an indi
method, said device being adapted to be used with
vidual member with the aid of a single funnel, or .
the apparatus layout herein recited for practising
it may be made up of a plurality of’ strands of
the present invention and also adapted for use
thread coming from separate- small individual
separately therefrom in other silk after-treating
funnels, the said strands in that case being as
sembled together and stretched as a combined
The accompanying drawing ~illustrates an'ex- ' - thread by means involving the use of rotating
ecutional example of apparatus adapted for prac
stretching members such as Godet rollers. These
30 latter are adapted to rotate at progressively in
'\tising the invention.
' '
Fig. 1 shows the apparatus with the spinning‘ ' creasing peripheral speeds; at the end‘ of said
stretching procedure the thread is passed over
funnels, guide rollers, treating rollers, and spool- ing device in diagrammatic ‘form.
another member, say the second roller of a pair
Fig. 2 is a detailed view in section of the im
of stretching rollers‘ and‘ treated with acid for
proved spool used in cooperation with the appa
eliminating the copper contained in the thread.
ratus of Fig. 1.
This method however is not limited to the method
Fig. 3v is an end view. of the spool.
of execution just described and which involves
In producing arti?cial silk from cuprammo
stretching and deacidi?cation. In fact, the
'nium cellulose solutions by means of the funnel
thread may be treated with chemicals while upon
stretch-spinning process, the device used forv 40 or between the rollers or other stretching devices
spooling or receiving the spun thread heretofore
used and either‘prior to, during, or after the
has usually consisted either of a spool or reel or
stretching. Thus, ‘the thread may betreated with
a ‘centrifuge. The use of a spool or reel is at
salt solutions while still on the stretching devices
tended by certain drawbacks which manifest
and with ammonia water after being acidi?ed.
skeins, etc. when they are later withdrawn .from
the receiving device, reel or spool, but is rather
led to another, positively driven, roll or roller
upon which it is treated with water. These sepa
rate treatments prior to. reeling or spooling serve
.to have such an e?ect upon the arti?cial silk.
that the shrinkage of the latter while on the spool
or reel is very ‘greatly reduced. The thread may
said'spool or reel. Moreover, the primary spun
material thus produced is obtained in-the form
of skeins or strands and these must be after
treated in various ways for which purpose they
must be in loosened condition; such procedure in
certain of the arti?cial silk industry branches I‘ then be wound in the wellknown manner upon
be expanded and contracted, for which purpose
it is slit longitudinally, the edges of the slit being
arranged to lie in overlapped instead of abutting
the reel or spool in cross-wound fashion and can
at the same time or subsequently be treated with
a ?nishing liquid, (oil, size, etc.). The reel or‘
spool may be constituted as a collapsible, per
relation. Radial expansion and contraction‘ of
the perforated cylindrical jacket is eifected by
forated cylindrical spool having sheet metal walls.
An embodiment of an improved spool of this kind
moving either or both of the end ?anges I5, ll
and constituting a feature and object of the
axially towards or away from each other by screw
operated or other means indicated by the screw
present invention is described below in detail and
24, thus causing the ends of the cylindrical jack
shown in the drawing. The spun thread can be
subjected while thereon to any desired after 10 etto ride upon the inclined internal portions 26, '
21 of the end ?ange members l5, l6. This spool
treatment (if desired) ‘as by spraying, or forcing
can also be converted into a rigid spool by im
the liquid through by either suction or pressure.
mobilizing the jacket with respect to the two
A spun material so produced is so uniform in
‘ lateral or end ?anges I5 and 16 instead of per
nature that it is practically free from dye differ:
15 mitting the jacket toexpand 'or contract.
that case, the edges l1 and 18 of the cylindrical
jacket, which may be suitably beaded, are caused
ess, the thread or ?bre structure considered as
to engage into annular grooves l9 and 20 pro
a whole is made up of a plurality of individual
vided in the two ?anges 15, I61 as shown in Fig.
strands or bundles of thread coming from small
individualfunnels, certain’ di?iculties are apt to 20 2. A shaft 23 is carried in the central apertures
2| and 22 of the two lateral cover ?anges It,
be encountered; when the usual direction re
If, while operating within the scope of the proc
versing (traverse) rods are used beneath the ,
funnel since the various partial or component
thread strands or bundles become traversed to a
IS. The shaft 23 may carry a gear wheel 25 or
pulley which serves to drive the spool.
Modi?cations of the 'present'invention will
varying extent by said traverse rod or rods. It 25 readily be recognizedv by those skilled in the art,
and it is desired to cover all-modi?cations and
has however been found that these non-uniform
variations thereof coming within the scope of
mechanical strains which give rise to irregulari
the. appended claims.
ties in dye af?nity'and tension conditions in the
What is claimed is:
thread ‘structure as a whole, can be eliminated if
1. In a method of producing high strength
a..common, positively driven traversing roller is 30
arti?cial silk from cuprammonium cellulose solu
substituted for the said traverse rod; said roller
tion, the steps comprising spinning a plurality of
may extend over the entire machine or machine
strands of cuprammonium cellulose by the cel
lulose stretch-spinning process in separated
The method above described'has been found as funnels which are adjacent to each other and
pointed in the same direction, combining the
to be particularly suitable for producing very
strands thus spun into a single thread on a posi
?ne, and in fact the ?nest titers of high-strength
sections in a manner similar to that used for the
stretching and washing rollers.
arti?cial silk.
tively driven traverse roller-below the funnels,
The mechanism of the process may readily be
explained by means of an illustrative apparatus
such as that shown in the accompanying draw
ing. Referring to said drawing, Fig. l, the in
continuing the stretching and forming of the
combined thread by passing the same over a se
ries of positively driven stretching rollers hav
ing progressively increasing peripheral speeds
‘ dividual strands or bundles ‘of thread 4, 5, and
and treating the spun thread with washing solu
6 coming from the spinning funnels l, 2 and 3 are
led beneath the positively driven traverse roller
‘I; in addition to causing a change of direction
tions while on certain rollers of the ‘series, and
this roller also serves to remove the greater por
then spooling the thread upon a perfdratedcyl
2. In a method of producing highi strength
tion of the spinning water from the threads.
The combined thread which is kept in taut con
arti?cial silk from cuprammonium cellulose solu
acidi?ed and washed out, whence it is - then
- coppering and washing agents, and then spooling
the thread upon a perforated cylinder.
tion, the steps comprising spinning a plurality of
tact with the roller 1, before being acidi?ed and 50 strands of cuprammonium cellulose by the cellu
lose. stretch-spinning process in separated fun
while still in alkaline condition, then passes over
nels, which are adjacent ‘to each other‘ and
the ?rst roller 8 of a stretch-spinning arrange
pointed in the same direction, combining the
ment and then over the second stretch roller 9
strands thus spun'into a single thread on a posi
of said arrangement, the latter roller rotating at
a higher peripheral speed; in this case also the 55 tively driven traverse roller below the funnels,
continuing the stretching and forming of the
thread is in taut contact therewith. On this
combined thread by passing the same over a se
roller, the thread is acidi?ed with diluted sul
ries of positively driven guiding rollers having
phuric acid and freed from copper. Thereupon,
progressively increasing peripheral speeds and
while still maintaining taut contact with said
roller and while under tension it passes to the 60 during such continued stretching and forming
treating the spun thread successivelyv with de
washing roller I0 upon which it is thoroughly de
passed through agency of a second traverse roll
er II to the winding reel or spool l2.
The winding, collapsible spool I2 is one of the 65
features of the invention and rls shown in greater
detail in Figs. 2 and 3. The jacket or cylinder
I3 made of perforated sheet metal is adapted ‘to, -
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