Device for Drawing Straight, Laying Parallel, and Rendering Finer the Fibres of Slivers.
Year: 1892

page_text: Date of Application, 14th Mar., 1892
Complete Specification Left, 29th Nov., 1892-Accepted, 31st Dec., 1892
PROVISIONAL SPECIFICATION.
Device for Drawing Straight, Laying Parallel, and Rendering Finer
the Fibres of Slivers.
I, RUDOLF SPOENDLIN, of Zürich, in the Republic of Switzerland, Manu-
facturer, do hereby declare the nature of this invention to be as follows:-
In the spinning of yarn the drawing processes, as is well known, are performed
by drawing machines, and such are used in the spinning of coarse and fine counts.
These drawing machines consist of a series of pairs of rollers, the lower roller of
which is mostly grooved and the upper one plain, the top rollers being successively
more weighted in such a manner, that the upper feeding roller exerts only its own
weight onto the fibres, whilst the upper delivery roller is weighted the most and
therefore exerts the greatest pressure on the fibres. The pairs of rollers are also
arranged in such a manner, that the fibres which run between the upper and lower
rollers, and at the delivery roller receive the largest amount of drawing, will move
in a straight line.
Now the new device is such that the drawing of the fibres does not take place
between single pairs of rollers, but is effected on the circumference of a roller,
which is inserted between a suitable fibre feeding device and a pair of delivery
rollers. This roller therefore replaces principally the intermediate pair or pairs of
rollers of the drawing machine, for instance, the first pairs of rollers thereof.
With this new device long and short fibres can be worked up together readily.
And in order that my invention may be more fully understood I have caused to be
appended hereunto one sheet of drawings which represents the constructional
principal.
Fig. 1 is an arrangement in which the large roller is inserted between the
unweighted feed rollers and the weighted delivery rollers, the two pairs of rollers
being positioned horizontally;
Fig. 2 is the like arrangement with an intermediate roller having teeth to
increase its adhesion;
Fig. 3 is also an arrangement of a roller furnished with teeth, but with fibres
running at an incline.
It
a¹
be preliminary remarked that the feeding roller pair a,
may
be readily
may
replaced by any other suitable means for effecting the introduction of the fibres..
For the sake of simplicity and to deviate as little as possible from the drawing
arrangement hereto used, the feeding device a, a¹ is supposed to be such as usual.
The fibres are drawn in by the pair of rollers a, a' at a°; between the unweighted
feeding roller and the weighted delivery pair of rollers c', c, is arranged the
adhesion roller of comparatively larger diameter, so that the fibres are conducted
in an arc form, aº up and down again to c. This arc, as will be readily understood,
is formed by the upper portion of the circumference of the roller b, which serves as
adhesion support for the fibres. The rollers c', c have a larger circumferential speed
than the roller b, so that the weighted (see weight g) delivery rollers are permitted
to draw the longer fibres out of those laying over the circumference of the roller b,
without drawing with it the shorter fibres adjacent thereto, because the com-
paratively large supporting surface will also give the shorter fibres the necessary
hold.
To increase the adhesion, in most cases it may be of advantage to provide the
circumference of the roller b with special means for adhesion, for instance with wire
teeth, bristles, plush, fabric, etc., or otherwise by suitably roughening the same.
Figs. 2 & 3 show a wire point covering. These points (like bristles, plush, etc.)
serve to give special hold for the fibres when during the drawing, the longer

page_text: nores are drawn passed the shorter fibres not yet caught by the delivery pair of
rollers.
D
COMPLETE SPECIFICATION.
Device for Drawing Straight, Laying Parallel, and Rendering Finer
the Fibres of Slivers.
1, RUDOLF SPOENDLIN, of Zürich, in the Republic of Switzerland, Manu-
facturer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
In the spinning of yarn the drawing processes, as is well known, are performed
by drawing-machines, and such are used in the spinning of coarse and fine counts.
These drawing-machines consist of a series of pairs of rollers, the lower roller of
which is mostly grooved and the upper one plain, the top roller being successively
more weighted in such a manner, that the upper feeding roller exerts only its own
weight onto the fibres, whilst the upper delivery roller is weighted the most and
therefore exerts the greatest pressure on the fibres. The pairs of rollers are also
mostly arranged in such a manner, that the fibres which run between the upper and
lower rollers and at the delivery roller receive the largest amount of drawing, will
move in a straight line.
The new device is such that the drawing of the fibres does not take place
between single pairs of rollers, but is effected on the circumference (having teeth
or needles) of a roller which is inserted immediately between a suitable fibre
feeding device and a pair of delivery rollers. This roller therefore, replaces
principally the intermediate pair or pairs of rollers of the well known drawing-
machine.
With this new device long and short fibres can be worked up together readily.
And in order that my invention may be more fully understood I have caused
to be appended hereunto one sheet of drawings which represent the constructional
principal.
Fig. 1 is an arrangement in which the larger roller is inserted directly between
the unweighted feed rollers and the weighted delivery rollers, the two pairs of
rollers being positioned horizontally, and the larger or intermediate roller having
wire teeth or being suitably roughened, both to increase its adhesion;
Fig. 2 is also an arrangement of a roller furnished with teeth, but with fibres
running at an incline.
It may be preliminarily remarked that the feeding roller pair a, a, may be
readily replaced by any other suitable means for effecting the introduction of the
fibres.
For the sake of simplicity and to deviate as little as possible from the drawing
arrangement hereto used, the feeding device a, a', is supposed to be such as usual.
The fibres are drawn in by the pair of rollers a, a¹ at a; between the unweighted
feeding roller and the weighted delivery pair of rollers c¹, c, is arranged, the
adhesion roller b of comparatively larger diameter, so that the fibres are conducted
in an arc form a° up and down again to co. This arc, as will be readily understood,
is formed by the upper portion of the circumference of the roller b which, altogether
with its teeth, serves as adhesion support for the fibres. The rollers c', o have a
larger circumferential speed than the roller b, so that the weighted (see weight g)
delivery rollers are permitted to draw the longer fibres out of those laying over the
circumference of the roller b, without drawing with it the shorter fibres adjacent
thereto, because the comparatively large supporting surface will also give the
shorter fibres the necessary hold.
1

page_text: Also other suitable means for a great adhesion may be employed instead of the
wire teeth, as for instance plush, rough fabric, etc. The points serve the most to
give special hold for the fibres, when during the drawing, the longer fibres are
drawn passed the shorter fibres not yet caught by the delivery pair of rollers.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is―
In a device for drawing straight and laying parallel the fibres of slivers, the
combination with a feeding-device and a pair of delivery rollers, of one larger
roller between the feeding-device and the delivery rollers, over which larger roller
the slivers are conducted and of a roughened or wire toothed covering on the said
larger roller, whereby no drawing straight takes place between the larger roller
and the feeding-rollers, substantially as set forth.
Dated this 98th day of November 1892.
F. BOSSHARDT & Co.,
4. Corporation Street, Manchester, Agents to Applicant.
F. BOSSHARDT & Co.,
4. Corporation Street, Manchester, Agents to Applicant.