Improvements in Bands for Rota-rubber Machines or Condensers for Wool Spinning.
Year: 1888

page_text: Date of Application, 17th Dec., 1888
Complete Specification Left, 29th June, 1889-Accepted, 5th Oct., 1889
PROVISIONAL SPECIFICATION.
Improvements in Bands for Rota-rubber Machines or Condensers
for Wool Spinning.
We EDUARD DOLLFUS and HERMANN NOACK, both of 6 Belforter Strasse,
Mülhausen, Elsass Germany, manufacturers do hereby declare the nature of this
invention to be as follows :-
--
Our invention relates to improvements in bands for rota-rubber machines or
condensers use in wool spinning which are used to compact the narrow slivers from
a carding-machine so to bring them into the condition of "slubs." The narrow
circumferential cards of the doffing-cylinder deliver the narrow slivers which pass to
the condenser.
The belt, which is as wide as the doffing-cylinder is supported by a pair of
transverse rollers, in the usual manner receiving the slivers which are detached from
the card-rings of the said cylinder by the doffing-knife. As the slivers pass from the
doffer they run between the two belts which in addition to the longitudinal motion
have an endways motion, back and forth in the direction of their breadth.
The bands used till now in condensers were made from buff-leather or ordinary
leather which have several disadvantages.
Our improved band consists of a ground work of felted cloth and covered with
leather, the leather being cemented and sewn to the cloth.
By reference to the accompanying drawings
Fig. 1 shows a complete band. A is the ground of felted cloth, B is the outside
of leather.
Fig. 2 is a top view of fig. 1 showing by the dotted lines c, where the two are sewn
together.
The cloth ground is always of a regular thickness and the leather covering is
reduced to a certain thickness so that all the bands in the machine are of the same
thickness.
The bands made from leather alone stretch irregularly resulting in an irregular
"slub."
Our new band does away with this evil; on account of the elasticity of the cloth
it does not receive a permanent set when stretched.
The result of which is a rounder and smoother "slub" and giving a regular and
even yarn.
•
On account of the elasticity of this band it is not required to be stretched so
tight, thus causing a saving in the wear and tear of the machine.
These bands are not so liable to slip on account of their not being so easily
affected by oil and fat.
Dated Berlin, this 8th day of December 1888.
COMPLETE SPECIFICATION.
Improvements in Bands for Rota-rubber Machines or Condensers
for Wool Spinning.
We, EDUARD DOLLFUS and HERMANN NOACк, both of 6 Belforter Strasse,
Mulhausen, Elsass, Germany, Manufacturers 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:-
Our invention relates to improvements in bands for rota-rubber machines or

page_text: condensers used in preparing wool for spinning the bands being employed to
compact or condense the narrow slivers from a carding engine so as to bring them
into the condition of "slubs."
The narrow circumferential strips of card fillet on the doffing cylinder deliver the
slivers of wool to the condenser, a separate band or rubber leather being employed as
usual for each sliver as it is detached from the doffing cylinder the bands are
supported by a pair of transverse rollers and they receive an endways or transverse
movement in addition to their longitudinal or revolving motion in the usual manner.
The bands hitherto used as rubber leathers in condensers were made of leather of
various kinds prepared in different manners all of which have certain disadvantages
that our improved bands or leathers are calculated to overcome.
And in order that our invention may be fully understood and readily carried into
effect we will describe the accompanying Sheet of Drawings reference being had to
the figures and letters marked thereon.
Figure 1 is a plan looking on the edge and Figure 2 a side view of a band made
according to our improvements and intended for a rota rubber or condenser as
applied to machinery for preparing wool to be spun.
a is the ground work of the band composed of a strong woven and felted cloth the
ends of which are preferably cut diagonally and united by stitching them together
with fine thread or in any other suitable manner; b is a thin leather covering of calf,
chamois or other leather specially prepared to be of equal thickness throughout the
cloth and leather being cemented and stitched together so as to form one body the
ends of the leather bands are preferably scarfed and cemented together.
As the cloth which is preferably made of wool can be manufactured of an even
thickness and the leather is reduced to the desired thickness we are enabled to
produce bands or rubber leathers of one uniform thickness and consequently all the
slubs or slivers have a uniform size and are free from thick and thin places.
Ordinary bands made of single sheets of leather are apt to stretch unevenly thus
making thick and thin places which cause the "slubs" or slivers to be uneven, the
leathers also become hard and brittle and soon wear out but our improved bands
having a foundation of elastic felted cloth stretch evenly and do not receive a
permanent set when stretched neither do they become greasy or dirty even when
working dyed wools therefore it is not necessary to wash them as it is with the
ordinary rubber leathers and further our improved bands retain their softness and
pliability to the last.
Although we have described the cloth as being felted it is obvious that any cloth
possessing the necessary elasticity and softness might be employed in the manufacture
of our improved bands or leathers.
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 we
claim is :-
The improvements in bands used in rota rubber machines or condensers employed
in machinery for preparing wool for spinning said improvements consisting
essentially in making such bands of cloth and leather combined substantially in the
manner and for the purposes herein set forth.
Dated this 27th day of June 1889
EDUARD DOLLFUS.
HERMANN NOACK.
By Geo. Thomas & Co.,
Agents.