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Патент USA US2129956

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sept. 13, 1938.
c. T. PASTOR
SPIRAL COVERING MACHINE
Filed Nov. 11, 19.56
2,129,956
2,129,956
Patented Sept. 13, 1938
UNITED STATES PATENT OFFICE
v
2,129,956
sPmAL covEmNG MACHINE
Carl Theodor Pastor, Huls, near Krefeld,
, -
Germany
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'
Application November 11, 193s, serial No. 110,32
’ In Germany October 27, 1934
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s claims. (ci. 117-42)
My invention relates to a spiral covering ma
chine with spindles having individual electric
as indicated at 1 or 'l' depending upon Whether
the thread runs oiï from the lower -or upper end'
drives.
When covering threads, the core threadpass- .
of the bobbin 2.
.
"
The essential feature ofthe invention lies, con
5 ing through the hollow spindle of the yarn hold sequently, in the fact that the thread 1 isi pressed 5
ing bobbin is spirally covered with the covering onto the revolving calotte 5 by the air current
thread. At high operating speeds, such as, for coming from above as indicated `by tli'e arrows
instance, 6,000 and more R. P. M., the drawback 8. The ring 6 has a nozzle-like effect. The air
l exists that the point, where the covering thread current is produced according to the embodiment
l0 runs on the core thread, begins to wander in the u shown in Fig. 1 by the revolving calotte from the 10 i
axial direction, thereby impairing the quality of`
the covering thus produced. _This is particular
edge of which the air is centrifuged thus creating
a depression, whereby a supplementary aircur
rent is produced a's indicated bythe arrows 8
textile threads.
'
which presses the thread onto the calotte. The
15
'I'his drawback is avoided according to the in
calotte, therefore, fulfills at the same time two 15
vention by the use of'a mushroom-shaped thread requirements, i. e., it serves to guide the thread
guide adapted to the form of the thread balloon and to produce the air current.
and secured to thel upper end of the spindleThe invention is not limited tothe embodiment
revolving at a speed exceeding 6,000 R. P. M. At disclosed, particularly not to the means described
20 such a high speed, the air is centrifugated from for guiding the thread and for producing the air 20
ly the case when covering rubber threads with
the outer'edge of the thread guide, thus causing
by the depression thereby produced a supplemen
tary air current in a substantially axial direc
tion which then flows from the center Aof the
25 calotte to the periphery thereof.
'I'his air cur
rent presses the covering thread running 'on the
core thread against the surface of‘the calotte.
In this manner, a wandering of the point where
the covering thread runs on the core thread mov
30 ing in the axial direction is prevented. ` The air
current is strengthened according to the inven
tion by a stationary ring arranged above the'up
current.
-
,
_
~
'I'he device shown in'_diagrammatic form in
Figs. 2 and 3 serves to strengthen the air current
which presses the` covering thread onto the
calotte. This is brought aboutv by longitudinal 25
apertures arranged in the bobbin holding the cov
ering thread. 'I'hese longitudinal apertures have
a fan-like -eiîect, since owing to the high speed
of the bobbin the air present in the longitudinal
apertures is caused to flow outwardly and, there- 30
fore,>in the downward direction out of the bores
of the bobbin. 'I‘he depression thereby created
per end of the bobbin and having a convex sur
in the bores of the bobbin causes a suction of
face with respect >to the axis of the spindle. In the air in the axial direction. This current of
35 operation the ring influences the air current in_ air pas'ses along the covering thread and presses 35
the neighborhood of the. covering thread. The the latter firmly against the surface of th'e
revolving covering thread doesI not, however,
mushroom-shaped ,thread guide. For strength
come into contact with the ring.
~
' In the accompanying drawings two embodi
which has fan-like acting projections, recesses
40 ments of my invention are vshown in diagram
matic form, in which
-
~
Fig. 1 shows> an elevational view of a spiral
ening the air current a >circular cover plate
or inclined perforations or any suitable means 40
for producing a fan effect maybe preferably ar
ranged on the upper end of thethread holding
, covering machine and
' bobbin. This eñect may be further strengthened
Figs. 2 and 3 show a modiñed form of the in- ~ by giving the inner surface of the longitudinal
apertures a convenient shape by providing these 45
~
'I'he motor I carries on its hollow spindle the 'surfaces with grooves or the like which under
thread holding bobbin 2. The thread to be cov- " circumstances have such a twist as to act as an
ered, for instance,- a rubber thread 4 passes axial pump. _ Other means such as devices which
through the hollow spindle 3. The mushroom
are based on the principle of the Francis tur
50 shaped thread guide 5 adapted to the form of bine'or the Kaplan turbine or also other blade 50
the thread balloon is secured to the upper end wheels and >the like may be employed for
of the hollow spindle 3 so as to directly face the l strengthening the air current.
>It has been found particularly advantageous
running-on point of the cover thread. 6 denotes
to design spiral covering devices each combined
the ring which strengthens the air current pro
66 duced. The thread balloon 'l assumes the shape with an electric motor in such a manner that the 55
45 vention.
2
2,129,956
air current produced by the motor-ventilator is
utilized for influencing the run of the thread.
'I_'he means forproducing the air current are so
designed that the air current is regulable.
In Fig. 2, 2l denotes the thread passing through
the hollow spindle and which is to be covered with
the thread 22. 23 is the running-on point, 24 is4
the motor, 25 the spindle thereof and 26 the
bobbin mounted thereon. The body of the bob
10 bin has longitudinal bores 21. 30 denotes a
plate or cover mounted on the upper frontal side
of the bobbin 26 and gripping over the rim 33 of
this bobbin. 'I'he cover 34 has openings and
projecting parts 35, thus forming a fan for pro
guiding surface adapted to the shape of the ad
jacent part of said balloon.
3. In a machine for twisting cover threads
around a core thread, a tubular spindle designed
to carry a bobbin of said cover thread and to
guide through its bore said core thread, an elec
tric motor connected with said spindle and
adapted for revolving-said spindle at a speed
above 6,000-R. P. M., a mushroom-shaped guide
for said cover thread mounted on one end of 10
said spindle, a body for holding a bobbin of said
cover thread, said body being arranged on said
spindle between said motor and said thread guide
and having longitudinal apertures for the passage
15 ducing an air current which passes the bores 21. ~ of air, and a fan-like element on said body for
The direction of the air current is indicated by
the arrows 28. The mushroom-shaped thread
guide 29 adapted to the thread balloon is pro
vided with a hole 30 for the passage of the
20 thread 2| to be covered.
yarn on the bobbin.
3| denotes the covering
-
Fig. 3 illustrates a plan View of the bobbin hav
ing a hub 3.2 as shown.
The machine according to the invention may
25 be under circumstances employed also for twist
ing when the core threadto be covered is omitted.
I claim as my invention:
1. In a machine for twisting cover threads
around a core thread, a rotatable tubular spindle
producing an air current flowing'in axial direc
tion against said thread guide and partly pass
ing through said apertures of said body.
4. In a machine for twisting cover threads
around a core thread, a tubular spindle designed 20
to carry a bobbin of said cover thread and to
guide through its bore said core thread, an elec
tric motor connected with said spindle and adapt
ed for revolving said spindle at a speed above
6,000 R. P. M., a mushroom-shaped guide for said 25
cover thread mounted on one end of said spindle,
means for holding a bobbin of said cover thread
on said spindle between said motor and said
mushroom-shaped guide, said machine being de
for guiding the core thread, means for holding
a bobbin of the cover thread, a thread guide
fixedly mounted on one end of said spindle for
guiding said cover thread coming from said bob
bin around said core thread, said machine being
designed to allow, when in operation, said cover
thread to form a thread balloon, said thread guide
having a guidingsurface adapted to the shape of
signed to allow, when in operation, said cover 30
thread to form a thread balloon, said thread guide
havinga convex surface shaped according to the
contour of the-adjacent portion of said thread
balloon and being arranged to Ycontact with said
the adjacent part of said balloon, and a sta
ing a bobbin of a th'read to be twisted, means
for revolving said spindle, a thread guide ñxedly
mounted on said spindle, said thread guide hav 40'
ing a convex surface shaped according to the
shape of the thread balloon near the running
on point of said thread and being arranged to
contact said thread, and means for producing an
air current and for directing said current against 45
said convex surface of said thread guide in order
`to hold said thread in contact with said surface,
said machine being designed to allow, when in
-operation, said cover thread to form a thread
tionary ring arranged between said bobbin and
40 said thread guide and having a convex inner an
nular surface in order to guide the air current
produced by said thread guide and said balloon
‘ when in operation, said ring surrounding -said
spindle
portion
balloon
balloon
face,
concentrlcally and the diameter of the
of theI inner ring surface nearest to said
being larger than the diameter of the
portion next adjacent to said ring sur
,
2. In a machine for twisting cover threads
50 around a core thread, a tubular spindle designed
to carry a bobbin of said cover thread and to
guide through its bore said core thread, an elec
tric motor connected with said spindle and adapt
ed for revolving said spindlev at a speed above
55 6,000 R. P. M., a mushroom-shaped guide for
said cover thread mounted `on one end of said
spindle, means, actuated by said spindle, for
producing an air currentl flowing in axial direc
tion against said thread guide, and a body for
holding a bobbin of said cover thread, said body
being arranged on said spindle between said mo
tor and said thread guide and having apertures
in axial direction for the passage of said air
current, said machine being- designed to allow,
05 when in operation, said cover thread to form a
thread balloon, and said thread guide having a
portion.
5. In a machine for twisting strands from
threads, a revolvable spindledesigned for carry- »
balloon, and said thread -guide having a guiding
surface adapted to the shape of the adjacent
part of said balloon.
6. With a machine for twisting cover threads
around a core thread, said machine being de
signed to allow said cover _thread to form a thread
balloon, in combination, a rotatable tubular spin
dle for guiding said core thread, means for hold
ing a bobbin of said cover thread, and a rotatable
thread guide ñxedly mounted on the end of` said
spindle so as to be in immediate proximity of co
the running-on point of said cover thread, said
thread guide having a convex surface shaped ac
cording to the contour of the adjacent portion
of said thread balloon and being arranged to con
tact with said portion.
‘
CARL THEODOR PASTOR.
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