Improvements in the Manufacture or Preparation of Extract of Coffee or the like.
Year: 1899

page_text: Date of Application, 23rd Dec., 1899
F
1000
1000
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture or Preparation of Extract of
Coffee or the like.
I, JAMES DUNCAN, of 9, Mincing Lane, in the City of London, Gentleman, do
hereby declare the nature of this invention to be as follows:-
The principal object of my invention is to prepare extract of coffee, but it may
also be employed in obtaining extract of chicory, or other produce, where it is
desired to obtain extracts without the loss of aroma, or volatile constituents.
According to my invention, (which I will presume, for the purposes of descrip-
tion, to be applied to coffee), I treat the coffee in any necessary preliminary
manner, such as roasting it, and I reduce it to an impalpable powder, or very fine
state of division, and I make it into a mass of paste-like consistency by the addi-
tion of cold water. This paste I then subject to strong pressure in any suitable
press, and the liquor which is expressed is mixed with a further
quantity of coffee and the pasty mass thus formed is expressed, and the
expressing process and addition of the expressed liquor to fresh coffee may be
repeated as often as is necessary, preferably until the specific gravity of the
extract obtained reaches 1100, when it is enclosed in bottles, or other air-tight
receptacles, for sale. To exhaust the coffee sufficiently of its valuable constituents
it will require to be mixed with weaker liquor, or water, into a thick pasty mass,
say about five, or six, times. When the expressed liquor is only of a specific
gravity of 1010 the coffee may be regarded as exhausted of its valuable properties.
The specific gravity of the extract can be carried higher than 1100 if desired
but a specific gravity of 1100 gives an excellent extract. When the work is
stopped any weak liquors which are in process of use should of course be kept
in air-tightly closed vessels till the work is proceeded with.
By the process described a concentrated extract is obtained without the use of
heat and consequently without loss of, or injury to, the aroma, or other valuable
properties.
Dated this 93rd day of December 1899
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
Improvements in the Manufacture or Preparation of Extract of
Coffee or the like.
1, JAMES DUNCAN, of 9, Mincing Lane, in the City of London, Gentleman, do
hereby declare the nature of this invention and in what manner the same is to be
Price 81

page_text: performed to be particularly described and ascertained in and by the following
statement:—
The principal object of my invention is to prepare extract of coffee, but it may
also be employed in obtaining extract of chicory, or other produce, where it is
desired to obtain extracts without the loss of aroma, or volatile constituents.
According to my invention (which I will presume for the purposes of descrip-
tion, to be applied to coffee), I treat the coffee in any necessary preliminary
manner, such as roasting it, and I reduce it to an impalpable powder or very fine
state of division, and I make it into a mass of paste-like consistency by the addi-
tion of cold water. This paste I then subject to strong pressure in any suitable
press, such as a hydraulic press, and the liquor which is expressed is mixed with
a further quantity of coffee and the pasty mass thus formed is expressed, and the
expressing process and addition of the expressed liquor to fresh coffee may be
repeated as often as is necessary, preferably until the specific gravity of the
extract obtained reaches 1100, when it is enclosed in bottles, or other air-tight
receptacles, for sale. To exhaust the coffee sufficiently of its valuable constituents
it will require to be mixed with weaker liquor, or water, into a thick pasty mass,
say about five, or six times. When the expressed liquor is only of a specific
gravity of 1010 the coffee may be regarded as exhausted of its valuable properties.
The specific gravity of the extract can be carried higher than 1100 if desired
but a specific gravity of 1100 gives an excellent extract. When the work is
stopped any weak liquors which are in process of use should of course be kept
in air-tightly closed vessels till the work is proceeded with.
By the process described a concentrated extract is obtained without the use of
heat and consequently without loss of, or injury to, the aroma, or other valuable
properties.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed I declare that what I claim is:
The manufacture or preparation of extract of coffee, chicory, or other produce,
by forming it, in the condition of an impalpable powder or very fine state of
division, into a mass of paste-like consistency by the addition of cold water, and
subjecting this mass to strong pressure, then mixing the liquor expressed with
a further such mass and again expressing, the operation being again repeated, if
necessary to obtain the extract of the required specific gravity, as herein before
explained.
Dated this 20th day of September 1900.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.