AN IMPROVED PROCESS FOR MANUFACTURING INDIA-RUBBER PIPES
Year: 1861

page_text: LETTERS PATENT to Jean Baptiste Jules Noirot, of 29, Boulevart
St. Martin, Paris, in the Empire of France, Manufacturer of India-rubber
Articles, for the Invention of "AN IMPROVED PROCESS FOR MANUFACTURING
INDIA-RUBBER PIPES."
Sealed the 10th October 1861, and dated the 20th April 1861.
PROVISIONAL SPECIFICATION left by the said Jean Baptiste Jules Noirot
at the Office of the Commissioners of Patents, with his Petition, on the
20th April 1861.
I, JEAN BAPTISTE JULES NOIROT, of 29, Boulevart St. Martin, Paris, in the
Empire of France, Manufacturer of India-rubber Articles, do hereby declare
the nature of the said Invention for "AN IMPROVED PROCESS FOR MANUFACTURING
INDIA-RUBBER PIPES," to be as follows:-
India-rubber tubes at present are made by suitably preparing a sheet of
that material, which is then wound round a core and the two edges united
together. Now this Invention relates to a new method, of manufacturing
india-rubber tubes of indefinite length without seam or junction. For this
purpose one or several cakes of india-rubber are incorporated and rendered
homogeneous by pressure and forced to pass through annular draw plates,
which mould it in the form of a tube. These draw plates may be of any
dimensions according to the required size of the tubes. . :
The apparatus employed for the manufacture of the tubes consists of two
rollers turning in opposite directions, which form the sides of a trough, & by
their rotation force the material to pass through an annular draw plate in
connection with the trough. The tubes are formed on a central core or mandril
fixed in any suitable manner within the trough which enters within the

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Jean Baptiste Jules Noirot in the Great Seal Patent Office
on the 18th October 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JEAN
BAPTISTE JULES NOIROT, of 29. Boulevart St. Martin, Paris, in the Empire of
France, Manufacturer of India-rubber Articles, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twentieth day of April, in the year of our Lord One
thousand eight hundred and sixty-one, in the twenty-fourth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Jean Baptiste Jules Noirot, Her special licence that I, the said Jean Baptiste
Jules Noirot, my executors, administrators, and assigns, or such others as I,
the said Jean Baptiste Jules Noirot, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for
"AN IMPROVED PROCESS FOR MANUFACTURING INDIA-RUBBER PIPES," upon the
condition (amongst others) that I, the said Jean Baptiste Jules Noirot, my
executors or administrators, by an instrument in writing under my, or their, or
one of their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to be per-
formed, and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Jean Baptiste Jules Noirot, do hereby
declare the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement :-
My Invention refers to an improved process for manufacturing india-rubber,
gutta percha, and the like tubes, whereby no cementing is required, and
whereby articles of indefinite length can be obtained, and it consists of a
standard apparatus, which is composed of two flatting cylinders turning towards
one another and compelling the mass being prepared and thrown into a hopper

page_text: to pass through a gauge plate with. central core, fitted beneath in such a
manner that it shall be moulded & drawn into tubes without any cementing of
indefinite length, and of any diameter required. The same process of con-
tinuous fabrication may be applied for obtaining solid lengths of india-rubber,
gutta percha, and the like gums of any diameter and length desired; for
that .purpose it suffices to suppress the central cores and suit the diameter
of the holes to the size of the products to be obtained and generalizing my
process. I apply it not only to india-rubber and gutta percha, but also to all
other similar gums. Nor do I limit my process of continuous fabrication to
tubes, solid lengths, and the like, but I apply it likewise to obtaining other
products (either india-rubber, gutta percha, or other gums), such as washers,
sheets, either smooth or grooved, of so-called endless lengths, billiard table
bands, profiled lengths for mouldings, and the like. For obtaining washers it
suffices to section the tubes transversely; for sheets I apply longitudinal draw
plates, which when smooth will yield smooth sheets, and yield grooved pro-
ducts when they are formed with grooves thereon; for.telegraphic wires I have
the wire drawn through the internal part of the mandril, the lower portion of
which has been previously cut out. The wire will on its passing through the
lower draw plate be coated with a layer or sheath of the gum; for billiard-
table bands & for mouldings, embossed or not, I make use of draw plates with
or without their cores and of suitable profile; when tubes are to be vulcanized
or otherwise treated, requiring a core or centre, I manufacture them as in the
nanner herein described of covering telegraph-wires, that is to say, produce
them on rods, which are left within them till subsequently treated, when
they are withdrawn.
I have represented my standard apparatus in the annexed Drawing wherein
Fig. 1 is a cross section, showing a portion of the two cylinders, between which
the mandril is adjusted; Fig. 2 shows the longitudinal elevation of the set of
mandrils in the hopper; Fig. 3 shows the plan of the same; Fig. 4 shows the
top elevation of the machine, and also the motion-transmitting agents; Fig. 5
shows, on a smaller scale, another elevation at right angles with Fig. 4, where
the cylinders are shown longitudinally. In these Figures the same letters of
reference indicate the like parts where they recur.
a, flatting compressing cylinders, turning towards one another; b, central
mandrils (or cores), with smooth surfaces formed in the centre of the hopper,
and serving to make the vacuity in the tubes; c, the lateral parts of the hopper;
d, annular holes, through which the soft mass is made to pass; e, the main
mandril, which is formed with the part 6; f, holes in the mandril, for the
purpose of equalizing the pressure of the material between the two cylinders,

page_text: .
and in all the parts of the feed hopper, and also obtaining solid or hollow
products perfectly homogeneous throughout their section and length, Figs. 4 & 5;
g, framing of the machine ;. h, motion-transmitting agents,, for rotating the
cylinders a, which are hollow, and heated by a current of steam coming in
through the tube i, and let out through the tube k; j, driving crank; all. the
projections met with by the material in the hopper have smooth surfaces."
My apparatus may be modified as follows:-Ind, a third cylinder may be so
arranged as to act upon the mass; 2dly, the two cylinders may be caused to
turn in the same direction; 3dly, the same cylinders may be made to turn
with different speed; 4thly, one cylinder only may be placed in one hopper;
5thly, the cylinders may be disposed vertically with a draw plate equally ver-
tical, that is to say, constantly perpendicular to the pushing motion of the
mass.; 6thly, one of the cylinders may be so disposed and arranged as to free
the draw plates, and the better direct to the products in course of fabrication.
All these modifications, save the last one, which is good, are not unexception-
able, and I prefer the arrangements shown in the annexed Drawings.
Having thus described the nature of my said improvements in manufacturing
india-rubber tubes, I wish it to be distinctly understood that I do not confine
myself to the precise details herein described, nor likewise to the form and
arrangement of the apparatus or parts of the apparatus specified and shown,
as such may be varied or modified either in the manner which I have men-
tioned, or in any other manner without departing from the principle of action
thereof; but what I claim as being of my Invention is,
First, the continuous mode of fabrication of tubes, solid lengths, ornamental
mouldings, washers, billiards-table bands, tubes, or sheathes obtained from india-
rubber, gutta percha, and the like gums by means of the flatting apparatus,
herein described and shown in the annexed Drawing..
. Secondly, the various arrangements of the apparatus, as described, and also
the modifications which I have mentioned, together with its draw plates and
mandrils, the latter being provided with openings for the purpose of equalizing
the pressure, and obtaining homogeneous products, as especially described.
In witness whereof, I, the said Jean Baptiste Jules Noirot, have here:
unto set my hand and seal, this Eleventh day of October, in the
year of our Lord One thousand eight hundred and sixty-one.
J. B. J. NOIROT. (L.S.).