Improvements in and relating to the Production of Adhesive Substances, Soluble in Water, from the Gum Exuded from Almond, Cherry, Peach, and other Trees.
Year: 1891

page_text: Date of Application, 7th Dec., 1891
Complete Specification Left, 27th Jan., 1892-Accepted, 2nd Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Production of Adhesive
Substances, Soluble in Water, from the Gum Exuded from
Almond, Cherry, Peach, and other Trees.
I, LUDWIG KERN, of 16 Catharinenstrasse Hamburg in the Empire of Germany
Chemist, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the production of adhesives or
agglutinants in the form and qualities of gum-arabic from such vegetable secretions
which exude from almond, cherry, peach and other trees and which are in their
natural state not soluble in water; and the object of my invention is thoroughly
to purify such exudation and make the same soluble in water, in order to render it
applicable for the purposes mentioned.
In carrying my invention into practice I first grind the hard brittle gum, generally
found at the foot of the said trees in big lumps mixed with earth and other
impurities which are to be separated by bolting, and then steep the meal so obtained
in pure water for about 12 to 24 hours. A gelatinous mass is thus obtained which
is then run into an autoclave and there exposed to the action of steam at a pressure
of from 15 to 90 pounds per square inch for about 15 minutes to one hour, where-
upon the mass is forced under a considerably reduced pressure through a filter press
the frames of which are lined with narrow woven cloths.
From the filter press the filtrate is conducted into an evaporating apparatus in
which the same is freed from the largest portion of the water combined therewith,
at a moderate but uniform temperature. The viscid mass so obtained is finally
dried on galvanized or enamelled iron-sheets which have been previously covered
with a film of grease, oil or any other fatty matter to facilitate the removal of the
dry hard brittle substance thus obtained and which possesses all the properties of
the genuine gum-arabic.
It must be observed that in the course of the herein described process, the
substance thus heated will not come in contact with a metal which by means of its
oxide is fit to change the light translucent colour of the end-product. For this
reason all iron surfaces of the apparatus employed which come in contact with the
mass may be galvanized or lined with enamel and the disintegration of the gum
may be performed between stone, porcelain or other non-metallic surfaces.
Dated this 7th day of December 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to the Production of Adhesive
Substances, Soluble in Water, from the Gum Exuded from
Almond, Cherry, Peach, and other Trees.
I, LUDWIG KERN of Catharinenstrasse No. 16 Hamburg in the Empire of
Germany, Chemist, 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 relates to improvements in the production of adhesives or
agglutinants in the form and qualities of gum-arabic from such vegetable secretions
which exude from almond, cherry, peach, and other trees and which are in their

page_text: natural state not soluble in water; and the object of my invention is to thoroughly
purify such exudation and make the same soluble in water in order to render it
applicable for the purposes mentioned.
In carrying my invention into practice I first grind the hard brittle gum,
generally found at the foot of the said trees in big lumps mixed with earth and
other impurities which are to be separated by bolting, and then steep the meal so
obtained in pure water for about 12 to 24 hours. A gelatinous mass is thus
obtained which is then run into an autoclave and there exposed to the action of
steam at a pressure of from 15 to 90 pounds per square inch for about 15 minutes
to one hour, whereupon the mass is forced under a considerably reduced pressure
through a filter-press the frames of which are lined with narrow woven cloths.
From the filter-press the filtrate is conducted into an evaporating apparatus in
which the same is freed from the largest portion of the water combined therewith
at a moderate but uniform temperature. The viscid mass so obtained is finally
dried on galvanized or enamelled iron-sheets which have been previously covered
with a film of grease oil or any other fatty matter to facilitate the removal of the
dry hard brittle substance thus obtained and which possesses all the properties of
the genuine gum-arabic.
It must be observed that in the course of the herein-described
process, the
substance thus heated must not come in contact with a metal which by means of
its oxide is capable of changing the light translucent colour of the latter product.
For this reason all iron surfaces of the apparatus employed which come in contact
with the mass may be galvanized or lined with enamel and the disintegration of the
gum may be performed between stone, porcelain or other non-metallic surfaces.
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. The process of producing adhesive substances, soluble in water from the
gum exuded from almond, cherry, peach, and other trees which consists chiefly in
steeping the pulverized gum in water, treating the gelatinous mass thus obtained
by steam under pressure, filtering, evaporating, and drying the same, substantially
as and for the purpose set forth.
Second. The application and use of adhesive substances obtained from the gum
exuded from almond, cherry, peach, and other trees and treated substantially as
set forth.
Dated this 27th dox of Tanu 1909
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.