IMPROVEMENTS IN THE PROCESS OF TANNING
Year: 1887

page_text: Date of Application, 30th Nov., 1887
Complete Specification Left, 30th Aug,, 1888
Complete Specification Accepted, 5th Oct., 1888
I FRANCIS HAROLD COLLEY, of the Meersbrook Tannery, Meersbrook, in the
County of Derby, Tanner and Currier, do hereby declare the nature of my said
invention for "IMPROVEMENTS IN THE PROCESS OF TANNING" to be as follows:-
In the usual processes of Tanning, after the hides or skins have had the hair
removed, by treatment with lime or otherwise, it is necessary to remove or neutralize
the lime or other substance with which they have been thus previously prepared and
with which they become impregnated; before they can be effectually treated with the
Tanning solution.
By the methods commonly employed this cleansing or neutralizing operation occupies
considerable time, and the object of my invention is to expedite this part of the process
and thereby economize time and expense.
I effect this object in the following manner, after the hides or skins have been treated
by the lime process or otherwise, I place them in a solution of vegetable or mineral
substances, or mixture of both, such as may be employed as a Tanning Solution, and
in conjunction with such solution I employ Carbon-di-oxide (C.O..) commonly called
carbonic acid gas which may be used either in solid or liquid form and either with or
without artificial pressure.
The effect of the combination herein described being to expedite the process partly
by mechanical agitation and partly by chemical action.
The essential feature of my Invention is the combined use in the process of Tanning,
of Carbon-di-oxide (C.O..) with a Tanning solution composed of solution of vegetable
or mineral substances or both, as herein previously described.
Dated this 28th day of November 1887.
R. HEBER RADFORD,
Agent for the Applicant.

page_text: I FRANCIS HAROLD COLLEY of the Meersbrook Tannery, Meersbrook in the
County of Derby Tanner and Currier, 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 : —
In the usual procesess of Tanning, after th ehides or skins have had the hair removed,
by treatment with lime or otherwise, it is necessary to remove or neutralise the lime
or other substance with which they have been thus previously prepared and with which
they become impregnated; before they can be effectually treated with the Tanning
solution.
By the methods commonly employed this cleansing or neutralising operation
occupies considerable time, and the object of my invention is to expedite this part of
the process and thereby economise time and expense.
I effect this object in the following manner; after the hides or skins have been
treated by the lime process or otherwise I place them in a solution of vegetable or
mineral substances, or a mixture of both, such as may be employed as a tanning
solution, and in conjunction with such solution I employ Carbon-di-oxide (CO)
commonly called carbonic acid gas which may be used either in solid or liquid form
and either with or without artificial pressure.
The effect of the combination herein described being to expedite the process partly
by mechanical agitation and partly by chemical action.
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
The combined use in the process of Tanning; of Carbon-di-oxide (C.O,.) with a
tanning solution composed of solution of vegetable or mineral substances or both,
substantially as hereinbefore described.