Improvements in Coffee Infusers, and in Cocks or Taps therefor.
Year: 1896

page_text: Date of Application, 1st Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Coffee Infusers, and in Cocks or Taps therefor.
I, JULES PROVOYEUR, of 18 Boulevard de Bruxelles, Gand, in the Kingdom of
Belgium, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved coffee infuser which, while filtering the
liquid coffee or extract, allows a primitive infusion to be obtained by pouring the
boiling water directly over the ground coffee lying on the bottom of the filter, but
without allowing the liquid drawn off to contain coffee grounds, the infusion
of which continues as long as any liquid remains in the vessel. A coffee infusion
is thus produced of a quality unattainable by any apparatus hitherto in use. In
all these apparati the water does not remain in contact with the coffee sufficiently
the mass.
long for the process of extraction to be completed, but percolates quickly through
According to my invention I use, an apparatus of very simple construction,
the essential feature being the use of a filter, for containing the ground coffee,
which filter is placed at the bottom of the infuser instead of at the top as is usual
in other coffee making apparati. A small free space is left between the filter
and the bottom of the infuser in order to enable the infusion to flow through a
cock or other appropriate draw-off device.
It is evident that the said filter may be placed near the bottom of the vessel in
any suitable manner so long as the essential condition is fulfilled, viz. the appli-
cation of the filter near the bottom and the draw-off tap placed between the filter
and the bottom of the vessel.
In carrying out my invention I construct the vessel of a more or less conical
shape and into this vessel a second conical vessel is inserted, which is provided
with a bottom of wire gauze fabric or other perforated material constituting the
filter. Since the top of the filter or inner vessel is near the top of the infuser or
outer vessel the steeping mass cannot, mix with the filtered coffee, which is drawn
off through the cock situated between the filter and the bottom of the infuser.
The filter is perfectly detachable from the outer vessel, so that both may be
cleaned with the greatest facility, as they contain no projections or recesses,
because their conical shape allows them to fit perfectly together without fastenings
or supports.
The apparatus is completed by a draw off cock or tap of novel construction and
convenient in use, which moreover offers considerable advantages over cocks or
taps of the ordinary kind. This improved cock or tap is simple in construction,
easily detachable, perfectly tight closing and does not allow any liquid to leak
through when closed, contrary to the action of cocks generally used."
This construction is as follows:-
A hollow plug forms a conduit from the infuser to which it is screwed or other-
wise secured, and a movable seat exactly encases the outer extremity of the plug,
and has an orifice which can be made to coincide with an orifice in the plug and

page_text: thus by turning the seat the liquid may be drawn off. The seat is retained upon
the conical part of the plug by a washer, nut and screw at the outer end thereof,
and a cap screwing upon the seat over difisiant and washer, and provided with a
suitable handle enables the seat to the turned around the plug. It is evident that
when the seat of the cock is turned for the purpose of closing the cock, so that
the orifice in the seat is on that side of the cock opposite to the orifice in the
plug, that any drop of liquid adhering to the seat is retained in the seat orifice
and so prevented from falling.
Actcha 1906
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in Coffee Infusers, and in Cocks or Taps therefor..
I, JULES PROVOYEUR, of 18 Boulevard de Bruxelles, Gand, in the Kingdom of
Belgium, 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 an improved coffee infuser which, while filtering the
liquid coffee or extract, allows a preliminary infusion to be obtained by pouring
the boiling water directly over the ground coffee lying on the bottom of the filter,
but without allowing the liquid to mix with the coffee grounds, the infusion of
which continues as long as any liquid remains in the vessel; coffee infusion is
thus produced of a quality unattainable by any apparatus hitherto in use. In
these apparatus the water does not remain in contact with the coffee sufficiently
long for the process of extraction to be completed, but percolates quickly through
the mass.
According to my invention I use an apparatus of very simple construction,
the essential feature being the use of a filter containing the ground coffee, which
filter is placed at the bottom of the infuser instead of at the top, as is usual in
other coffee-making apparatus. A small free space is left between the filter and
the bottom of the infuser in order to enable the infusion to flow through a cock.or
other appropriate draw-off device.
It is evident that the said filter may be placed near the bottom of the vessel in
any suitable manner so long as the essential condition is fulfilled, viz., the appli-
cation of the filter near the bottom and the draw-off placed between the filter
and the bottom of the vessel.
In the accompanying drawing I have shown how my said invention. may be
conveniently and advantageously carried into practice.
Figure 1 is a vertical section through the axis of the vessel.
Figure 2 is a longitudinal section of the cock or tap adapted thereto.
Figure 3 is an elevation of the latter and.
Figure 4 is a cross section through the axis of the discharge orifices.
In carrying out my invention I construct the vessel C of a more or less conical
shape and into this vessel a second conical vessel is inserted, which is provided
with a bottom of wire gauze fabric or other permeable material constituting the
Since the top of the filter or inner vessel is near the top of the infuser or outer
vessel, the steeping mass can not mix with the filtered coffee, which is drawn off
through the cock situated between the filter and the bottom of the infuser. The
filter is perfectly detachable from the outer vessel so that both may be cleaned

page_text: with the greatest facility as they contain no projections or recesses because their
conical shape allows them to fit perfectly together without fastenings or supports.
The apparatus is completed by a draw-off cock or tap of novel construction and
convenient in use, which moreover offers considerable advantages over cocks or
taps of the ordinary kind. This improved cock or tap is simple in construction,
easily detachable, perfectly tight closing, and does not allow any liquid to pass
through when closed, contrary to the action of cocks generally used.
The construction is as follows:--
A hollow plug A forms a conduit from the infuser, to which it is screwed or
otherwise secured and a movable seat B exactly encases the outer extremity of the
plug, and has an orifice O' which can be made to coincide with an orifice Ö in the
plug and thus by turning the seat the liquid may be drawn off. The seat is
retained upon the conical part of the plug by a washer, nut and screw at the outer
end thereof, and a cap screwing upon the seat over the nut and washer and pro-
vided with a suitable thumb-piece D enables the seat to be turned around the
plug. It is evident that when the seat of the cock is turned for the purpose of
closing the cock, so that the orifice O¹ in the seat is on that side of the cock
opposite to the orifice O in the plug, that any drop of liquid adhering to the seat
is retained in the seat orifice and so prevented from falling.
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. An improved coffee infuser of the kind described, in which a filter for
receiving the ground coffee is used, this filter being so placed near the bottom of
the infuser that a free space is left between the filter and the bottom, in order to
enable the filtered infusion to be drawn off through a cock or other appropriate
device provided and terminating in this free space for the purpose of keeping the
filtered infusion in constant contact with the liquid mass on the top without how-
ever this latter being enabled to become mixed with the extracted product.
2. A constructional device for applying the filter in coffee infusers in conformity
with the first claim, the essential feature being the insertion of a conical vessel
into another conical vessel, both being of nearly the same height, the inner vessel
being constructed as, a filter by applying to its bottom a fine wire gauze fabric or
other appropriate permeable surface.
3. The use of the above described improved cock in coffee infusers of the kind
referred to.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.