Improvements in the Manufacture of Coffee.
Year: 1896

page_text: Date of Application, 15th Apr., 1896
Complete Specification Left, 12th Jan., 1397-Accepted, 20th Feb., 1897
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Coffee.
HENRI BOISSELIER "The Shrubbery" Enfield Middlesex Merchant do hereby
declare the nature of this invention to be as follows:-
My invention relates to an improved method of manufacturing coffee, whereby
the whole of the roasted coffee herry is rendered miscible with water, thus saving
the waste at present occasioned by the usual process of infusion or decoction and
providing a quicker and more convenient method of making the beverage.
My invention consists essentially of a discovery I have made that if roasted
coffee is thoroughly admixed with a large percentage of a fatty, oily or waxy
substance with a melting point below the temperature of boiling water, preferably
a solid fat melting at about 90° Fahrenheit, the whole can be made to assume the
peculiar character of cocoa inasmuch as I can make the coffee, which has hitherto
only been ground to fine powder, owing to its fibrous and brittle nature, when in
this new condition into a perfectly smooth liquid or paste by working it between
two grinding surfaces. I have found that it is only by means of this smooth pasty
formation and thorough incorporation of the fibre with any of the above named
substances by grinding, that the division and disintegration of particles of coffee
becomes so perfect as to enable the whole of the final product to be readily held in
suspension in hot water, without sediment or deposit.
This paste can then be freed of its superfluous fatty, oily or waxy matter by
hydraulic pressure or any convenient means, and the coffee remaining, after
pulverising, is found to yield a smooth soft spongy powder free from all traces of
grit, from which a cup of coffee can be instantly made by the mere addition of hot
water.
I am aware that previous to my invention it has been proposed to treat' coffee,
which has only hitlierto been ground to powder of varying fineness, with a small
percentage of oil or fat for the purposes of retaining the aromatic properties and
also to assist binding for compression into blocks etcetera, but my invention of fatty
treatment is of an entirely different nature; and consists of a new method of
treatment by grinding into paste.
The final product cau be supplied ready for use either in loose powder or
compressed or moulded into tablets of measured quantities.
Dated this 14th of Ancil 1906
HENRI BOISSELIER "The Shrubbery" Enfield Middlesex Merchant 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:-
My invention relates to an improved method of manufacturing coffee whereby.

page_text: the whole of the roasted coffee is rendered miscible with water, thus saving the
waste at present occasioned by the usual process of infusion or decoction and
providing a quicker and more convenient method of making the beverage.
My invention consists essentially of a discovery I have made, that if roasted
coffee is thoroughly admixed with a large percentage of a fatty oily or waxy
substance, with a melting point below the temperature of boiling water, preferably
a solid fat melting at about 90° Fahrenheit, the whole can be made to assume the
peculiar character of cocoa, inasmuch as I can make the coffee, which has only
hitherto been ground to fine powder owing to its fibrous and brittle nature, when
in this new condition into a perfectly smooth liquid or paste by working it between
two grinding surfaces. I have found that it is only by means of this smooth pasty
formation and thorough incorporation of the fibre with any of the above named
substances by grinding, that the division and disintegration of particles of coffee
become so perfect as to enable the whole of the final product to be readily held in
suspension in hot water with nearly no sediment or deposit. This paste can then
be freed of its superfluous fatty oily or waxy matter by hydraulic pressure or any
convenient means, and the coffee remaining after pulverising is found to yield a
smooth soft spongy powder free from all traces of grit, from which a cup of coffee
can be instantly made by the mere addition of hot water.
I am aware that previous to my invention it has been proposed to treat coffee,
which has only hitherto been ground to powder of varying fineness, with a small
percentage of oil or fat for the purpose of retaining the aromatic properties and
also to assist binding for compression into blocks and similar purposes, but my
invention of fatty treatment is of an entirely different nature and consists essentially
of a new method of treatment by grinding into paste.
To carry my invention into effect I employ any wholesome oily, fatty or waxy
substance having a melting point below the temperature of boiling water but
preferably a solid fat melting at about 90° Fahrenheit, and I thoroughly admix
with this about an equal part of roasted coffee.
If this mixture is effected at a higher temperature that 90° Fahrenheit the
whole can then be allowed to cool and will set into a solid block. This block can
then be roughly crushed into smaller pieces by any convenient means and is ready
for grinding. I now grind this mixture between two grinding stones, preferably
horizontal, such as a cocoa mill, and when a sufficient degree of fineness has been
reached, a thick dark brown semi-liquid paste will be formed of a perfectly smooth
nature and free from all traces of grit. I collect this paste and while warm from
grinding place it in suitable cloth bags or folded cloths. By now applying pressure
of any sort all the superfluous fat I added to the coffee can be made to filter
through the cloths and thus again become separated from the coffee in a thin clear
liquid stream. To accomplish this on a commercial scale I employ preferably a
hydraulic press. As the quantity I can thus extract depends simply on the amount of
pressure applied it will at once be evident that the original proportions of fatty oily
or waxy substances added to the coffee are not limited to fifty per cent.; I find as
an example that of a fat with 90° Fahrenheit melting point, twenty-five per cent.
added to coffee will answer as well. as a higher percentage, the only difference
being a slower grinding action.
The coffee so treated remaining in the cloths is then pulverised and sifted and
will yield a smooth soft spongy powder free from all traces of grit from which a
cup of coffee can be made instantly by the mere addition of hot water.
This final product can be supplied ready for use either in loose powder or
compressed or moulded into tablets of measured quantities.
Having now particularly described and ascertained the nature of my inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A new method of preparing coffee into a smooth soft spongy powder readily
miscible with water for the purpose of saving the waste at present occasioned by

page_text: the usual process of infusion or decoction, and to provide also a quicker and more
convenient method of making the beverage, substantially as hereinbefore set
forth.