An Improved Fabric, applicable for Tubing, Belting, Valve Sheeting, and other Articles of an Elastic Nature.
Year: 1892

page_text: Date of Application, 4th June, 1892-Accepted, 23rd July, 1892
COMPLETE SPECIFICATION.
An Improved Fabric, applicable for Tubing, Belting, Valve
Sheeting, and other Articles of an Elastic Nature.
I, RICHARD TEMMEL, Proprietor of the firm of Kemmerich and Company, of
46, Bernburgerstrasse, 18, Berlin, S.W., Germany, Engineer, 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 :-
This invention has reference to the manufacture of tubing, belting, valve sheeting,.
and other articles of an elastic nature; and has for its object to provide a fabric
for use in such manufacture which shall possess strength and durability in addition
to the property of elasticity.
The class of fabric to which my invention relates is that in which india-rubber-
forms the principal constituent, such india-rubber being laced or provided with
insertions of suitable strengthening or stiffening material, which material has
hitherto consisted principally of either metallic or hempen textures but which latter-
have however been proved to possess the following defects.
Metals as used in the form of wire or wire netting for insertions in tubing,
belting, valve sheeting, and the like, besides the disadvantage of their great specific.
gravity, have also the defect that they do not combine well with liquid india-rubber ;.
whilst the inevitable oxydation of such metals has a prejudicial effect upon the
neighbouring lamina of india-rubber. Metal is also inapplicable as a strengthening
material for india-rubber fabrics which are subject to tensile strains, inasmuch that
such strains are not equally borne by the metal and the rubber.
Hempen insertions on the other hand are unsuitable for use under like conditions.
on account of their liability to stretch permanently, and moreover they do not
possess the stiffness which is desirable in many instances of the use of a fabric
strengthened thereby.
In order to explain the nature of my invention I have hereunto annexed a sheet
of drawings illustrative thereof, wherein
Figure I shews a piece of tubing constructed according to my invention, and
Figure II is a cross section thereof.
Figures III and IV illustrate my invention applied to the manufacture of belting.
for driving machinery.
According to my invention the strengthening or stiffening material which is used
consists of cane-wood-preferably of that species known as "tokio-cane "-which
is split into thin strips by any suitable splitting machinery. I have found that
cane-wood of the species above mentioned is capable of being split into strips of
upwards of twenty feet in length without the strength of the fibres, which run very
regularly, being thereby interfered with; and besides being of small specific
gravity, it combines very readily with india-rubber in its liquid state.
In applying my invention to the manufacture of tubing, an inner tube B is first
formed of any suitable fabric i coated on both sides with india rubber. A strip of
cane-wood R is then wound around this inner tube, spirally, while the india-rubber
coating is still liquid. The outer tube A. which is formed of a coated fabric a in
like manner to the tube B, is then applied, and the whole vulcanised together. It will
thus be seen that the tube consists of three closely connected lamina, namely, the
inner tube, the strengthening material, and the outer covering. Tubing constructed
in the above described manner offers great resistance to internal as well as to.
external pressures, such strength being due to the flat shape of the cane-wood strip.
and the firm attachment of the cane-wood to the rubber; whilst tubing which is.
strengthened by spirally coiled wire does not possess this strength, as the several.

page_text: rings comprising the spiral coil are capable of displacement owing to their defective
attachment to the india-rubber portions of the tubing.
In the application of my invention to the manufacture of belts for driving
machinery, composed of india-rubber, the strips of cane-wood R 1-0 are arranged
longitudinally therein and side by side, the number of strips varying with the width
of the belt required. The strips of cane-wood are thereupon enclosed with a cover
of canvas i which is coated on both sides with liquid india-rubber. This belt may
then be strengthened by successive coverings a of canvas and liquid india-rubber,
according to the strength of belt required.
In the application of my invention to the manufacture of valve sheeting, the
strips of cane-wood may be laid side by side in the centre of the india-rubber sheet
which they are required to strengthen, during the process of manufacture; or they
may be interlaced therein.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
First. A fabric consisting of india-rubber in which are embedded strips of cane-
wood, substantially as and for the purposes herein set forth.
Second. The manufacture of tubing, belting, valve sheeting, and the like, sub-
stantially as herein set forth with reference to the drawings hereto annexed.
Dated this 3rd day of June 1892.
CHEESBROUGH & ROYSTON.