AN IMPROVED PROCESS FOR THE RECOVERY OF INDIA RUBBER FROM WASTE CARDING, CUTTINGS, AND OTHER PIECES, OF INDIA RUBBER CLOTH to be as follows:
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
We, ADOLF GUTENSOHN, of Mile End, in the County of Middlesex, Engineer,
and ALFRED Cox, of the County of the City of Bristol, Solicitor do hereby
declare the nature of the said invention for "AN IMPROVED PROCESS FOR THE
RECOVERY OF INDIA RUBBER FROM WASTE CARDING, CUTTINGS, AND OTHER
PIECES, OF INDIA RUBBER CLOTH to be as follows:
"
2
This invention has for its object a process for the recovery of India rubber from
the scraps, cardings, or other pieces of fabric known as India rubber cloth, in which
india rubber is combined with woollen or other woven fabrics.
In order to put the invention in operation we sort the pieces of such fabric which
are to be treated, into three parts, first, those containing iron or steel; second :-
those in which the adherence of the india rubber to the cloth is not great; and
third-those in which they adhere firinly together.
We put those pieces in which iron or steel is present in the rubber, into a bath
of a solution of salt of copper such as sulphate or nitrate, of a strength which may
be varied according to the character of the material treated, and the iron or steel is
thus dissolved, copper being precipitated.
When the iron or steel has been thus removed, we add the pieces of fabric to the
second or third parts described above, according to their respective character. Those
pieces in which the india rubber and the fabric do not adhere firmly together we
put into a bath of hot water containing a small proportion of liquid ammonia, by
means of which they are quickly farther detached so that the india rubber can be
easily torn off.
Those pieces which contain no iron but in which the india rubber and the cloth
adbere very strongly together are put into a bath of liquid ammonia diluted with
water to a degree variable with the character of the pieces treated.
After remaining in this bath for a sufficient time which may be two or three
days, more or less, the india rubber becomes so far detached that it can also be
readily torn off from the cloth, the latter as well as the india rubber being obtained
in a saleable condition.
The copper which is precipitated as described in the bath first mentioned may be
either re-dissolved and again used, or it may be melted or used for making colours
or for other purposes in the ordinary way.
Dated this 23rd day of January 1884.

page_text: COMPLETE SPECIFICATION.
"
We, ADOLF GUTENSOHN, of Mile End, in the County of Middlesex, Engineer,
and ALFRED Cox of the County of the City of Bristol, Solicitor do hereby
declare the nature of our invention for AN IMPROVED PROCESS FOR THE
RECOVERY OF INDIA-RUBBER FROM WASTE CARDINGS, CUTTINGS, AND OTHER
PIECES OF INDIA-RUBBER CLOTH," 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 for its object a novel process for the separation and recovery
of India rubber from the scraps, cardings, or other pieces of fabric known as India
rubber cloth, in which india rubber is combined with woollen or other woven
fabrics.
In order to put the invention in operation we first sort and classify the pieces of
such fabric which are to be treated for the purpose of separating the india rubber
from them, into three parts, first :—those containing iron or steel, second
in which the adherence of the india rubber to the cloth is not great; and third :-
those in which they adhere firmly together.
those
We put those pieces in which iron or steel or both are present in the rubber, into
a bath of a solution of salt of Copper such as sulphate or nitrate, of a strength
which may be varied according to the character of the material treated, and the
iron or steel is thus dissolved, copper being precipitated.
When the iron or steel has been thus removed, we add the pieces of fabric to the
second or third parts described above according to their respective character.
Those pieces in which the india rubber and the fabric do not adhere firmly together
we put into a bath of hot water containing a small proportion of liquid ammonia,
by means of which they are quickly farther loosened or detached so that the india
rubber can be easily torn off from the cloth. Those pieces which contain no iron
but in which the india rubber and the cloth adhere very strongly together are put
into a bath of liquid ammonia diluted with water to a degree variable with the
character of the pieces treated. After remaining in this bath for a sufficient time,
which may be two or three days, more or less, the india rubber becomes so far
loosened and detached that it can also be readily torn off from the cloth, the latter
as well as the india rubber being obtained in a saleable condition.
The copper which is precipitated as described in the bath first mentioned may be
either redissolved and again used, or it may be melted or used for making colours
or for other purposes in the ordinary way.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. The method of recovering indiarubber from cloth or other fabric by treating
the material in a bath of liquid ammonia substantially as herein described.
2. When the material contains iron or steel the method of first dissolving
such iron or steel in a bath containing salt of copper, substantially as herein
described.
Dated this 23rd day of October 1884.