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Патент USA US2133535

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Oct. 18, 1938.
G_ CAMPQLUNGHI
TREATMENT OF SCI-IAPPE THREAD BANDS 0F ARTIFICIAL
‘
SILK. AND APPARATUS THEREFOR
'
Filed NOV. 26, 1935
2,133,535
Patented Oct. .18, 1938
' 2,133,535
UNITED STATES PATENT OFFICE
2,133,535
I
TREATMENT OF SCHAPPE THREAD BANDS.
OF ARTIFICIAL SILK, AND APPARATUS
THEREFOR
Giovanni Campolunghi, Rome, Italy, assignor to
Societa Anonima Minerva, Rome, Italy, a lim
ited company of Italy
Application November 26, 1935, Serial No. 51,702
In Italy November 26, 1934
7 Claims.
It is known that during the mechanical opera
tion of the washing, sulphur removal, bleaching,
reviving and dyeing of schappe bands of arti?cial
silk ?bers ‘to be transformed into staple ?bers,
45 these bands are conveyed through a row of con
tainers which either contain the appropriate
treating liquids or water to wash the same be
fore or after the various treatments.
(Cl. 8--151)
Figures 1 and 1a show in longitudinal section
and cross section respectively a container with a
bar moved in an arc.
Figures 2 and 2a show in a similar illustration
a container with a bar moved vertically up and '
down.
_
.
In the drawing, l indicates the container, 2
10 each bath by means of a pair of rollers, from the
the bath liquid, 3 are the cylinders which cause
the band to ‘move through the bath and at the
same time press it, 4 are the guiding rollers for
rotation of which it receives its movement, and
the band in the bath, 5 is the schappe band of
which at the same time expresses the remainder of
the water or bath liquid which remains in the
devices according to the invention.
The schappe arti?cial silk band is conveyed into
band from the previous bath.
'll
'
Under like conditions the e?ect of a treating or
washing bath on the schappe thread band is pro
portional to the time during which the band re
mains in the liquid, and the time depends on the
_ length of the container and the rate of movement
20 of the band.
'
—
The subject of the invention is a process by
which the action of these treating or washing
, baths is improved or. the time of treatment is
shortened and which is characterized by the fact
25 that the band is moved during its passage through
the bath container.
,
- Practical tests have shown that this movement
enables the time of the action‘ of the different
baths to be considerably shortened, in so far as
30 it opens the ?bers of the band which before were
compressed through the pressure of the cylinders,
thus facilitating the penetration of the liquid and
also in so far as a quicker change of the parts of
the liquid in contact with the band is produced,
35 the parts which have already exerted their action
are more quickly replaced by fresh and active
parts of the washing water or the solutions.
The practical advantage of the use of the mov
ing devices is obviously due to the fact that with
i 40 baths of the same length a greater quantity of
band can be treated and washed on account of the
higher rate of progress, or that with the same
45
gent between the band 5 and the two adjacent
guiding rollers 4.
~
The band 5 also takes along the bar 6 to a cer
tain extent during its progress through the bath,
on account of the friction and as the band forms 25
a de?nite angle over the‘ bar which increases
with a great tension on the band, this simul
taneousmovement lasts until the bar, under the
increasing influence of the force of gravity and
the pressure of the tensioned band, overcomes the 30
frictional adhesion. The bar then swings back
and the thread band lowers and its tension re
duces so that the bar is then taken along again in
its direction of progress, and thus the play be
tween bar and band is repeated continuously. 1 a
35
The device according to Figs‘. 2 and 2&1 consists
of any suitable apparatus vii’ which is either driven
from the same power source as the cylinder 3 by
means of a suitable transmission or from an in
dividual power source, and which gives to the 40
band 5, during the progress through the bath, an
'up and down movement transversely thereto,
whilst the alternating tensioning and relaxing of
containers to be made shorter.
the band produces the desired eifect as in the
'
’
The device according to Figs. 1 and 1a consists
of a bar 6 of convenient pro?le, which is arranged 15
under theband 5 and which can swing about an
axis lying over the band and parallel to the bar
‘itself.
The tangent between the bar 6 and the band 5
must be at a somewhat-higher level than the tan 20
running speed of the band it enables the bath
145
Finally the use of the devices for moving the
bands has also been shown to be advantageous in
?rst case.
the. dyeing of the band in the preliminary or
?nal color tones, since the opening of the band by
the movement facilitates dyeing as the particles
cording to the invention consists in that the two
pairs of cylinders 3 which move and press out the
band through the bath are moved at a speed which
is periodically alternated, and out of phase in such 50
a way that at the moment in which, for example,
50 can more easily penetrate to the centre.
According to the invention various means can
A third form of construction of the device'ac
the following examples with reference to the
the pair of cylinders supplying the band in the
bath is moving at its greatest speed, the other
pair of cylinders is moving at its slowest speed
drawing.
and vice versa. The mean peripheral speeds of 65
be used to produce the said movement of the band.
Three types of such movements are described in
II
arti?cial silk, 6 and 6' are the additional moving
<
'
"
2
'
2,133,535
the pair of cylinders are therefore the same so
auxiliary movement which alternately slowly ten
that the band is never stretched in the sense of
an extension of the threads but only undergoes a
sions and relaxes the band.
5. Apparatus for carrying out the process de
?ned in claim 3, comprising a bath container,
periodic slackening and tautening in accordance
with the change of speed of the pairs of cylinders,
thus securing the desired movement in the bath.
What I claim is:
'
-
Y
1. A process for improving the treatment of
> schappe bands of arti?cial silk in washing, sul
10 phur-removing, bleaching, reviving and dyeing
baths and the like, comprising passing the band
substantially horizontally and substantially lon
gitudinally thereof through the bath, and mov
ing the ingoing and outgoing portions of. said
15 band at periodically alternating rates of speed
out of phase with each other, whereby an aux
iliary substantially transverse movement is im
parted to the intermediate portions of said band
during said passage.
_
20
means for passing a band of arti?cial silk ?bers
longitudinally through the container, and a piv
otally mounted guide member over which said
band passes on its way through container, the
pivotally mounted guide member being actuated
by the frictional contact between the bar and the 10
band passing thereover, thus producing an aux
iliary movement which alternately slowly tensions
and relaxes "the band.
6. Apparatus for carrying out the process de
?ned in claim 2, comprising a bath container, 15
means for passing a band of arti?cial silk ?bers
substantially horizontally and substantially longi-.
tudinally thereof through the container, means
for supporting the band adjacent its points of
entry into and exit from said container, and 20
means for opening the band by imparting thereto
an auxiliary movement which alternately slowly
tensions and relaxes the band during its passage
through the bath, said last named means com
prising a vertically-reclprocable guide member 25.
2. A process for improving the treatment of
bands 'of arti?cial silk ?bers, to be transformed
into staple ?bers, in washing, sulphur removing,
bleaching, reviving and dyeing baths and the
like, comprising passing the band through a bath
25 container, and opening the band during its pas
sage through the bath container by the action of under which said band passes, and said guide
member being arranged intermediate said points
an auxiliary movement by which the band is al
' of entry and exit.
ternatelyslowly tensioned and relaxed.
7. Apparatus for carrying out the process de
3. A process for improving the treatment of
30 ‘bands of arti?cial silk ?bers, to be transformed ?ned in claim 2, comprising a bath container,
means for passing a band of arti?cial silk ?bers
into staple ?bers, in washing, sulphur removing, substantially
horizontally and substantially lonbleaching, reviving and dyeing baths and the like, gitudinally thereof through the container, means
comprising passing the band through a bath con
for supporting the band adjacent its points of
,tainer, and opening the band during its passage
.35 through ‘the bath container by the action of an entry into and exit from‘ said container, and
means for imparting to the ingoing and outgoing
auxiliary up and down movement by which the portions of said band movements at periodically
band is alternately slowly tensioned and relaxed. alternating rates of speed out of phase with each
4. Apparatus for carrying out the process de ' other, whereby an auxiliary substantially trans
?ned in claim 2, comprising a bath container, verse movement‘is imparted to the intermediate
means for passing a band of arti?cial silk ?bers portions of said band during its passage through
‘longitudinally through the container, and means
~ for opening the band by imparting thereto an
the bath.
‘
GIOVANNI CAMPOLUNGHI.
30
'
35,.
4a,
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