My principal improvement consiste in the
combining of sulphur and white lead with the
lodis-rubber, and in the submitting of the com
pound thee formed to the acles of beat at a When the india-rabber la spread sp the
regulated temperatore, by which combination frer kinds of cloth or of leather it is subjees
and exposure to beat it will be so far altered to peel therefrem by a moderate degree of foros,
in its qualities as not to become softened by the gom lettlag go the fiber by which the two
the action of the solar ray or of artifcial Leat are beld together. I have therefore devised
as a temperature below that to which it was another improvement in thle a manufacture by
submitted in its preparatios-asy to a beat of which this tendency in to a great measure or
2100 of Fahresbeis's scale-nor will it be inja-rected, and by which, also, the sheet gem, when
riously affected by exposure to cold. It will bet attached to cloth or leather, is better adapt
also resist the setion of the expreeand ells, and ed to a variety of purposes than when not pre-
thas likewise of spirits of turpentine, or of the pared by this improved mode, which is a ful
which oile are its seal solvente.
other esential oila at chce temperatures, laws After laying at of the gum, com
pended as alere set forth, ea soy suitable
The articles which I combine with the ladis fabric I cover it with a bat of cotton-wool as
rabber in forming my improved fabric are asl it is delivered from the doffer of a carding-ma
phor and white lead, which materiale may be chise, and this bat i sever with another cost
emplored in varying propertiess, bet that of the gam-a precess which may be repeated
which have found to answer beat, and to which two or three times, socording to the required
is is desirable to approximate in forming the thickness of the goods Avery this and strong
compound, is the following: I take twenty-dre fabric may be thas produced, which may he
parts of india rabber, five parts of sulpher, and used in lies of paper for the covering of boson,
seren parts of white lead. The india-robber books, or other articles
Inally dissolve in spirits of turpentins er
ether essential oil, and the white lead and sal
pbar also I grind in spirits of torperties in
the ordinary way of grinding paint There
three articles than prepared may, when it is
Intended to form a sheet by italt, be erealy
spread upon any smooth surface or upon glassd
eleth, from which it may be readily separated
bas I prefer to use for this purpose the elab
made amording to the present specification, as
the compound spread upon this article seps
rates therefrom more cleasty than from any
When this compound of lodia rabber, sal-
phar, and white lead, whether to be card aloo
in the state of aberta or applied to the earface
of any other fabris, has been fally dried, either
in a beated roem or by exposure to the san and
air, the goods are to be subjected to the action
of high degree of temperature, which will
admit of considerable variation-say from 212
to 330 of Fahrenbelt's thermometer, bas for
the best feel approaching as early as may
be to 2700. This beating may be effected by
ronning the fabrics over a beated cylinder
bat I prefer to expose them to an atmosphere
Instead of dissolving the india-rebber in the of the proper temperature, which may be beat
manner above es ferth, the salpbar sod white doce by the aid of an oven properly construct
lead, prepared by grinding as above directed, ed with openings through which the sheet or
may be incorporated with the substance of the web may be passed by means of suitable rall
Julia-rubber by the aid of boated cylinders or ere. When this procsse la formed open a
fabric consisting oftheabore named compound of lead or the oxides of thal metal may be aut
it must be allowed to remain open the cloth stituted therefor, and will produce a good f
en which it is made, in order to sustain it, as fect. I therefore under this head claim the
it is so far softed during the speration as employment of either of the exides or salts of
not to be capable of supporting its own weight lead in the place of the white lead in the above-
perature exceeding 2100, it must continue for
a very brief period
without ages sid. If the exposare be to a tem The of a fabric of the indiab
Having thes fally described the nature of
the process by which I prepare my improved
ladia rubber fabric, I do hereby declare that
do not new claim the combining of sulpher
with cacatchens, eisber in the propertien
named or la any other, this combination bar
me the 24th of February, 1539; bus
ing been the subject of a palest grested to
I de elai
1. The combining of the said gem with sul
ompound, either in the proportions herrie
pbar and with white lead, so as to form a triple
will produce a like result; and I will bere ro
mark that although I have obtained the boat
resulta from the carbenets of lead, other salte
THIS PROCESS PRODUCED THE MOST VALUABLE OF ALL
CHEMICAL PRODUCTS AND HAS GIVEN RISE TO INDUSTRIES
THAT ARE FUNDAMENTAL TO OUR PRESENT CIVILIZATION IT
IS THE KEY PRODUCT OF THE IMMENSE AUTO INDUSTRY AND
IS INDISPENSABLE FOR A THOUSAND USES