Improvements in the Covering of Drawing Cylinders or Rollers for Spinning and Roving Frames.
Year: 1897

page_text: Date of Application, 9th Apr., 1897-Accepted, 29th Jan., 1898
COMPLETE SPECIFICATION.
Improvements in the Covering of Drawing Cylinders or Rollers for
Spinning and Roving Frames.
We, JESALAS MARGULIES, Engineer, and ALBERT BOEHME, Foreman Spinner,
both of Pusta 24, Lodz, in Russian Poland, 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 :—
Hitherto leather has been the material employed for covering the drawing
cylinders of spinning and roving frames but cylinders so covered do not fulfil
all requirements.
When heavy work has to be done the leather covering very soon works into
rucks and runs hollow whereby the uniformity and quality of the product is
prejudicially affected.
When such leather coatings are used wet spinning is not possible because such
coating becomes sticky and the threads are pressed in, owing to which it is im-.
possible to continue spinning with the cylinder.
The object of this improvement is to obviate these defects.
The invention is illustrated in the accompanying drawings, in which :-
Fig. 1 shows the covering of one of the rear cylinders of a spinning or the
like frame.
Fig. 2 shows the covering of one of the front cylinders of the same.
The new covering comprises two layers one of which a is of soft and advan-
tageously white india-rubber and the other of hard or semi-hard and advan-
tageously black india-rubber.
This covering may be advantageously employed in such a manner that the
rear cylinder (Fig. 1) is first of all provided with a layer of soft rubber and then
outside this with a second layer of hard rubber; whilst the front cylinder on the
contrary has the layer a of soft rubber outside.
The ends of the covering are made conical in shape as shown.
In order that the oil (such as mineral oil which may be used to lubricate the
machine) may exert no injurious effect upon the soft outer layer a of the front
drawing cylinder the inner layer of hard rubber b is formed in the manner shown
in Fig. so that the ends of the cylinder covering may be of hard rubber.
By the use of this novel method of covering the cylinders of spinning and the
like frames the following advantages (over the method of covering such cylinders
with an under layer of cloth or stuff and an outer layer of leather as hitherto
carried out) are secured:-
1. Cylinders provided with the new coverings last very much longer than those
covered with leather for instance about six times as long.
2. These coverings can be applied to the iron body of the cylinder with far
greater facility than is the case with the coverings hitherto employed.
3. The new covering is not liable to form rucks or run hollow when the work
is heavy, whereby a want of uniformity would be occasioned in the product.
4. No appreciable wear of the covering takes place owing to which the upper

page_text: cylinders always work parallel with the lower fluted iron cylinders whereby the
manufacture of a thoroughly uniform product is assured.
5. Little or no slipping of the drawing cylinder upon the material takes place
owing to which a uniform product is obtained the "number" of which can be
strictly maintained.
6. The efficiency of a machine provided with drawing cylinders of the above
kind is higher than is the case with machines fitted with drawing cylinders of
the kind hitherto used.
7. Finally it should be observed that by the use of this new covering wet
spinning is facilitated--whereby a much closer product may be obtained; where
drawing cylinders covered with leather are used it is not possible to employ this
wet process.
Having now particularly described and ascertained the nature of our said 'inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:-
1. The herein described improvements in the covering of drawing cylinders
or rollers for spinning and roving frames which consist in the coating of the
drawing cylinder body with a combination of soft and hard or semi-hard india
rubber substantially as and for the purposes set forth.
a
2. The arrangement of an inner covering of soft india-rubber such as
(Fig. 1) and an outer covering of hard or semi-hard india-rubber such as b
(Fig. 1) in combination and acting in conjunction with the rear drawing cylinder
or roller for spinning and roving frames substantially as and for the purposes
described.
. 3. The arrangement of an inner layer of hard or semi-hard india rubber such
as 6 (Fig. 2) and an outer layer of soft india-rubber such as a (Fig. 2) in com-
bination and acting in conjunction with the front cylinder or roller for spinning
or roving frames substantially as and for the purposes described.
4. In coverings as and for the purposes claimed in Claim 1 constructing
the inner layer of hard or semi-hard india-rubber b in such a manner that it forms the
outer layer at both ends while the outer layer of soft rubber a lies within the
annular recess thus formed in the layer b with the object of avoiding the pre-
judicial action of mineral lubricating oil upon the outer covering of soft india
rubber substantially as and for the purposes described and illustrated at Fig. 2
of the drawings hereunto annexed.
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicants.