Improvements in the Manufacture of Infusions of Coffee and in Apparatus therefor.
Year: 1899

page_text: Date of Application, 2nd Aug., 1899
Complete Specification Left. 11th Apr., 1900-Accepted, 5th May, 1900
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Infusions of Coffee and in
Apparatus therefor.
I, HERMANN ESCHWEGE, of Sunnyside, Mayow Road, Forest Hill, in the
County of Kent, Manufacturer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the manufacture of infusions of coffee and is especially
applicable to the production of a concentrated infusion or essence.
The apparatus consists of a number of separate vessels each provided with an
inlet and outlet, the inlet being preferably at the bottom and the outlet at the
top. Between the inlet and outlet is a perforated diaphragm on which the
ground coffee is placed.
The vessels are arranged in series the outlet of one being connected to the
inlet of the next and preferably each vessel is at a lower level than the preceding
one so that the flow from vessel to vessel takes place by gravitation.
Water is introduced into the first vessel and passing through the ground coffee
in it flows into the second vessel and so on to the last. Each time the coffee in
the first vessel becomes exhausted the vessel is removed (the second vessel then
becoming the first) and another vessel containing. fresh coffee is added at the
end of the series. In this way the process is carried on continuously the coffee
in the first vessel being always the most nearly exhausted and that in the last
the least.
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1800
Improvements in the Manufacture of Infusions of Coffee and in
Apparatus therefor.
I, HERMANN ESCHWEGE, of Sunnyside, Mayow Road, Forest Hill, in the
County of Kent, Manufacturer, 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 the manufacture of infusions of coffee and is especially
applicable to the production of a concentrated infusion or essence.
The apparatus consists of a number of separate vessels each provided with an
inlet and outlet, the inlet being preferably at the bottom and the outlet at the
top. Between the inlet and outlet is a perforated diaphragm on which the
Ground coffee is placed.

page_text: The vessels are arranged in series the outlet of one being connected to the
inlet of the next and preferably each vessel is at a lower level than the preceding
one so that the flow from vessel to vessel takes place by gravitation.
Water is introduced into the first vessel and passing through the ground coffee
in it flows into the second vessel and so on to the last. Each time the coffee in
the first vessel becomes exhausted the vessel is removed (the second vessel then
becoming the first) and another vessel containing fresh coffee is added at the
end of the series. In this way the process is carried on continuously the coffee
in the first vessel being, always the most nearly exhausted and that in the last
the least.
The coffee should preferably be moistened in each vessel before it is put into
place and care should be taken to avoid large cavities containing air as these
cause blow holes allowing a too easy passage for the liquid. Care also should
be taken to allow space for the expansion of the coffee.
It is essential that the water should not be highly heated, a temperature of
about 70° F. is the best.
The drawing is a diagram side elevation partly in section of the apparatus I
employ.
a is a hot water tank, and b a cold water tank provided with cocks c and d
delivering into a mixing tank e. The temperature of the water in the tank e
should be about 100° F. or below. f is a cock by which water is delivered from
the mixing tank e into the top of a series of similar vessels g the lower one of
which is shown in section. Each of these vessels is provided with an inlet pipe.
and an outlet pipe j.
Preferably the inlet is at the bottom and the outlet at the top as shown.
and are perforated diaphragms and m is the ground coffee placed between
them.
The vessels are arranged in series the outlet of one being connected to the
inlet of the next and each vessel is at a lower level than the preceding one so
that the flow from vessel to vessel takes place by gravitation.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. The manufacture of an infusion of coffee by passing water at a temperature
considerably below the boiling point successively through a series of vessels
containing it.
2. The manufacture of an infusion of coffee substantially as described.
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