IMPROVEMENTS IN TREATING WASTE VULCANIZED INDIA- RUBBER
Year: 1858

page_text: LETTERS PATENT to Nathaniel Shattswell Dodge, of 44, St. Paul's
Churchyard, in the City of London, Merchant and Manufacturer, for the
Invention of "IMPROVEMENTS IN TREATING WASTE VULCANIZED INDIA-
RUBBER." A communication.
Sealed the 7th January 1859, and dated the 2nd November 1858.
PROVISIONAL SPECIFICATION left by the said Nathaniel Shatswell Dodge
•
at the Office of the Commissioners of Patents, with his Petition, on
the 2nd. November 1858.
1, NATHANIEL SHATTSWELL DODGE, of 44, St. Paul's Churchyard, in the
City of London, Merchant and Manufacturer, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN TREATING WASTE VULCANIZED INDIA-
RUBBER," a communication from a foreigner resident abroad, to be as
follows:-
This Invention relates to an improved system or mode of treating waste
vulcanized india-rubber, such as shoes, clothing, railroad springs, &c., which
from wear or other causes, have become comparatively worthless, whereby it
may be reduced to a plastic state and further strengthened for the purpose of
being again made up into various articles or fabrics. The essential feature
of this Invention consists in submitting the waste vulcanized india-rubber to
the action of steam in a close or other suitable vessel, after such rubber has
been first thoroughly ground between fluted or scored rollers or mullers in a
heated state, or reduced in any other suitable manner. By submitting the.
Price

page_text: ground mass, thus obtained, to the direct action of steam alone, or of steam in
connection with water, as may be most convenient, it becomes reduced to a
plastic or gummy state, fit for use again in the manufacture of vulcanized
india-rubber articles. It is found that the fibrous material mixed with the
waste vulcanized india-rubber, such as is found in shoes, clothing, &c., does not
deteriorate the value of the new product, but when incorporated with the mass,
adds stability to it, and where such fibrous material does not exist in the
waste vulcanized india-rubber, the strength and stability of the new product
may be materially increased by combining therewith fibrous materials and
thoroughly incorporating them with the rubber whilst in a plastic state by
grinding in heated rollers or other means. The rubber, after being combined
with the fibrous material may be mixed or incorporated in any suitable manner
with asphalte, coal tar, resin, pitch, pine oil, shellac, or other substance of a
like nature.
I thus obtain goods without the expensive process of reheating or vulcan-
izing, this result being sufficiently attained in the mode of manufacture
Lamoin set forth
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Nathaniel Shattswell Dodge in the Great Seal Patent Office.
on the 2nd May 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, NATHANIEL
SILATTSWELL DODGE, of 44, Saint Paul's Churchyard, in the City of London,
Merchant and Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of November, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Nathaniel Shattswell Dodge, Her special license that I, the said Nathaniel
Shattswell Dodge, my executors, administrators, and assigns, or such others as
I, the said Nathaniel Shattswell Dodge, my executors, administrators, or
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
"IMPROVEMENTS IN TREATING WASTE VULCANIZED INDIA-RUBBER," a communi-
cation from a foreignèr resident abroad, upon the condition (amongst others)

page_text: that 1, the said Nathaniel Shattswell Dodge by an instrument in writing
under my hand and seal, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be performed,
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 Nathaniel Shattswell Dodge, do hereby
declare the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement, that is to say :--
The said Invention relates to an improved method of treating waste
vulcanized india-rubber, such as shoes, clothing, railway carriage springs, &c.,
which from wear and other causes, have become comparatively worthless,
whereby such waste vulcanized rubber may be brought to a soft or plastic state,
and be rendered suitable for employment in and for the purposes hereinafter
mentioned.
One of the essential features of this Invention consists in submitting the
waste vulcanized rubber either before or after having been disintegrated,
reduced, or laminated by means of heated "mullers" or rollers, or by means
of other suitable disintegrating apparatus to the action of steam or steam
and water in suitably arranged vessels or tanks. In carrying out this
portion of the Invention, the rubber may either be subjected to the direct
action of steam, or to the combined action of steam and water in any closed or
other suitable apparatus where steam only is employed. The temperature in
the chamber containing the rubber is kept up until the said rubber assumes
the desired soft and plastic condition. I have found that the fibrous material
which is mixed with waste vulcanized india-rubber, as in the case of shoes,
clothing, and other things, does not deteriorate the value of the new products,
but when incorporated with the plastic mass adds strength and stability
thereto, and where such fibrous materials do not exist in the waste vulcanized
india-rubber, increase the strength and stability of the new products by
combining fibrous materials with the vulcanized india-rubber either previous
to or whilst in a soft or plastic state or condition, such condition being the
result either of the before mentioned or of other means of treatment. The
resulting plastic material mixed or incorporated with the fibrous material
hereinbefore referred to, may either be manufactured into fabrics or other
articles, without any further treatment, or the resulting material or product
may be mixed and incorporated with asphalte, resin, pitch, coal tar, shellac,
or other bituminous or resinous substance, and then passing the compound

page_text: between rollers or mullers until thoroughly mixed. By the employment of
the processes or methods hereinbefore described, I obtain from waste
vulcanized india-rubber, products of great value and utility.
Having now described and particularly ascertained the nature of the
said. Invention, and the manner in which the same is or, may be used or
carried into effect, I would observe, in conclusion, that I do not confine
or restrict myself to the precise details or arrangements which I have had
occasion to describe or refer to, as variations may be made therefrom
without deviating from the principles or main features of the said Invention;
but what I consider to be novel and original, and therefore, claim. as. the
Invention, secured. to me by the hercin-before in part recited Letters Patent,
is,―
First, the method or mode of restoring waste vulcanized india-rubber
by submitting it to the action of heat, steam, or of. steam and, water combined,
before or after such. rubber has been disintegrated, laminated, or reduced in
any suitable manner.
Second, the combining or incorporating of fibrous materials with waste
vulcanized india-rubber, either previous to or when in a plastic state, for the
purpose of adding strength and stability to the same.
Third, the employment and use, for the purposes herein-before mentioned, of
restored waste vulcanized india-rubber in combination with fibrous materials.
Fourth, the combining or mixing of the restored vulcanized india-rubber
when combined with fibrous materials with the before-mentioned bituminous,
resinous, or tarry.substances.
In witness whereof, I, the said Nathaniel Shattswell Dodge. have here-
unto set my hand and seal, this Second day of May, One thousand
oight hundred and fifty-nine
N. S. DODGE. (L.S.)