Improvements in Endless Rubbing Leathers used in Machinery for Preparing or Spinning Fibrous Material.
Year: 1892

page_text: Date of Application, 7th Nov., 1892
Complete Specification Left. 8th Aug., 1893-Accepted, 30th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Endless Rubbing Leathers used in Machinery for
Preparing or Spinning Fibrous Material.
We, BENEDICT VON HARENNE, Belt Manufacturer, of Aachen, in the German
Empire, EDMUND SCHWILDEN, Belt Manufacturer of Aachen, in the German
Empire OSCAR BARTHOLEMY, Master Spinner of Burtscheid in the German Empire,
and GOTTFRIED BUNGENBERG of Aachen in the German Empire, Master Spinner,
do hereby declare the nature of this invention to be as follows:-
The smooth surface continuous travelling leathers used in spinning machines for
condensing the yarn or fibre have the defect that the material does not adhere
thereto sufficiently. Such leathers have also, in order to enhance friction, had
made in them holes, indentations, or recesses cut into the leather and longer in the
direction of travel than across this direction, but these injure the leather so as to
considerably affect its durability and by reason of the sharpness of the edges of the
perforations, etcetera, it can only carry forward irregular and insufficiently smoothed
fibre or yarn.
The invention has for object to remedy these disadvantages by providing such
leathers with recesses of a curved or cup shape with rounded edges, formed by
pressure with a correspondingly shaped stamping or pressing tool. The recesses
may also be of greater length crosswise of the leather than in the direction of
travel but not longer in the direction of travel than across the leather. In this way
the fibre or yarn is better held on the leather.
By making the recesses of the form and in the manner described greater friction
between the leather and the fibre or yarn is obtained and the fibre of the leather, is,
in forming the recesses not destroyed but only compressed.
Dated this 7th day of November 1892.
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Endless Rubbing Leathers used in Machinery for
Preparing or Spinning Fibrous Material.
We, BENEDICT VON HARENNE, Belt Manufacturer of Aachen in the German
Empire, EDMUND SCHWILDEN Belt Manufacturer of Aachen in the German
Empire, OSCAR BARTHOLEMY Master Spinner of Burtscheid in the German Empire
and GOTTFRIED BUNGENBERG of Aachen in the German Empire, Master Spinner,
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 :-
The smooth endless rubbing leathers used in spinning machinery for condensing
the slivers or rovings or like yarn have the defect of not sufficiently operating upon
the same. Endless rubbing leathers which for the purpose of enhancing the rubbing
effect are furnished with perforations or punctures have already been manufactured
by Wilhelm Kaulhausen of Aachen and described in the German Patent
Specification No. 39838 and in the British Patent Specification No. 6036 of 1887.
The same manufacturer has also manufactured endless rubbing leathers having
recesses cut out or countersunk in the leather which are longer in the direction of
travel than across this direction but all such perforations, punctures and cut recesses
injure the leather, considerably affect its durableness and equable pliability, and

page_text: more important still, by reason of the sharpness and rawness of the edges of the
same the yarn or spinning material is condensed irregularly and insufficiently
smooth. It is found in practice that when the edges of perforations or recesses
formed in this way are rounded off by the application of pressure, they soon become
sharp and raw again owing to the alternating bending and stretching of the leather
when in work and the fibrous nature of the leather.
The invention has for object to completely remedy the said disadvantages by
forming upon the working surface of such leathers recesses of any suitable curved
or undulating form with rounded off edges, said recesses not being formed by
cutting, countersinking or puncturing the leather but by pressing or striking a
correspondingly shaped pressing or stamping tool or die..
In the drawing
Fig. 1 is a general perspective view of an endless rubbing leather of this
invention.
Figs. 2 and 6 shew fragments of rubbing leathers laid flat and drawn to an
enlarged scale with examples of the way the recesses may be set out.
Figs. 3, 4, 5 and 7 are cross sections drawn to a more enlarged scale shewing
different forms of recesses, Fig. 7 being a cross section taken through Fig. 6.
a are the pressed or stamped recesses, 6 the rounded edges of the same, e curved
rubbing cones formed in the middle of recesses a by means of a corresponding
recess in the pressing or stamping tool.
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. In rubbing leathers used in preparing or spinning fibrous material the provision
of recesses of a curved or undulating or cup shape with rounded edges by pressing
with or striking a correspondingly shaped tool, for the purpose specified substantially
as described and shewn.
2. In rubbing leathers of the kind referred to in Claim 1 the formation within
the recesses, of a curved or rounded off rubbing cone c in the manner described with
reference to Figs. 6 and 7 of the drawing.
Dated this 8th day of August 1893.
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicants.