Improvements in Tallow Melting or Rendering.
Year: 1893

page_text: Date of Application, 1st May, 1893
Complete Specification Left, 17th June, 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
Improvements in Tallow Melting or Rendering.
We, WILLIAM JOHN FRASER and THOMAS CASSIENET PALMER, both of 98,
Commercial Road, in the County of London, Engineers, do hereby declare the
nature of this invention to be as follows:-
In melting or rendering fats it has hitherto generally been the practice to place
the rough stuff in the melting apparatus direct without any previous treatment
(although in some cases the rough stuff has been disintegrated or cut) and then
subjecting it to steam or fire heat. It is well known that during this process
certain noxious fumes are evolved which are exceedingly unpleasant and means
have to be provided to get rid of these fumes such as by burning or condensing
them.
Our invention has for object the treatment of such fats so that we are able to
melt without any objectionable smell and at the same time an improved quality and
colour of tallow is obtained from inferior fats.
For this purpose the rough stuff after being cut or broken up into pieces is
subjected to a purifying treatment by steeping it in a suitable purifying solution,
whereby the animal tissues and membranes are caused to swell and loosen thereby
freeing the rough fat from the blood and other putrid matter which causes decom-
position in the melting. We have found that diluted sulphurous acid gives good
results in practice as a purifying agent.
The rough fat after our purifying operation is thoroughly washed with water so
as to remove all trace of acid and blood and is then melted at a low temperaturė
and clarified.
D
14 3 M... 1002
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Tallow Melting or Rendering.
We, WILLIAM JOHN FRASER and THOMAS CASSIENET PALMER, both of 98,
Commercial Road East, in the County of London, Engineers, 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 :-
In melting or rendering fats it has hitherto generally been the practice to place
the rough stuff in the melting apparatus direct without any previous treatment
(although in some cases the rough stuff has been disintegrated or cut) and then
subjecting it to steam or fire heat. It is well known that during this process
certain noxious fumes are evolved which are exceedingly unpleasant and means
have to be provided to get rid of these fumes such as by burning or condensing
them.
Our invention has for object the treatment of such fats so that we are able to
melt without any objectionable smell and at the same time an improved quality and
colour of tallow is obtained from inferior fats.
For this purpose the rough stuff which is advantageously cut or broken up into
pieces is subjected to a purifying treatment by steeping it in a suitable purifying
solution, whereby the animal tissues and membranes are caused to swell and loosen
thereby freeing the rough fat from the blood and other putrid matter which causes

page_text: decomposition in the melting. We have found that diluted sulphurous acid gives
good results in practice as a purifying agent.
The rough fat after our purifying operation is thoroughly washed with water so
as to remove all trace of acid and blood and is then melted at a low temperature
and clarified in any usual manner.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
:-
1. In the process of tallow melting or rendering subjecting the rough stuff to a
purifying treatment by steeping it in a suitable purifying solution such as diluted
sulphurous acid, substantially as and for the purpose specified.
2. The described process of tallow melting or rendering consisting in subjecting
the same to a purifying treatment thoroughly washing with water the resulting
rough stuff and then melting it at a low temperature and clarifying it, substantially
as described.
Dated the 17th day of June 1893
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.