U.S. patent application number 15/440799 was filed with the patent office on 2017-06-08 for pad holder, assembly, and method for producing a beverage.
This patent application is currently assigned to Koninklijke Douwe Egberts B.V.. The applicant listed for this patent is Koninklijke Douwe Egberts B.V.. Invention is credited to Gustaaf Frans Brouwer, Wenda Corina de Koning, Frederike Ingeborg Heijdel, Ivo Van Os, Jos Christiaan van der Veen.
Application Number | 20170158423 15/440799 |
Document ID | / |
Family ID | 43527273 |
Filed Date | 2017-06-08 |
United States Patent
Application |
20170158423 |
Kind Code |
A1 |
Heijdel; Frederike Ingeborg ;
et al. |
June 8, 2017 |
PAD HOLDER, ASSEMBLY, AND METHOD FOR PRODUCING A BEVERAGE
Abstract
Pad for producing a beverage, provided with a first permeable
layer and a second permeable layer opposite to the first permeable
layer. The pad is further provided with a filling arranged in
between the first and second permeable layer. The pad is arranged
for receiving pressurized water through the first permeable layer,
for dissolving, dispersing, and/or extracting at least part of the
filling in the received pressurized water. The pad is arranged for
releasing through the second permeable layer the water with the at
least part of the filling dissolved, dispersed, and/or extracted
therein. The first permeable layer has a plurality of apertures for
receiving the pressurized water. The apertures have a size
dimensioned for establishing swirling motion of the water inside
the filling.
Inventors: |
Heijdel; Frederike Ingeborg;
(Utrecht, NL) ; van der Veen; Jos Christiaan;
(Utrecht, NL) ; Brouwer; Gustaaf Frans; (Utrecht,
NL) ; Os; Ivo Van; (Utrecht, NL) ; de Koning;
Wenda Corina; (Utrecht, NL) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Koninklijke Douwe Egberts B.V. |
Utrecht |
|
NL |
|
|
Assignee: |
Koninklijke Douwe Egberts
B.V.
Utrecht
NL
|
Family ID: |
43527273 |
Appl. No.: |
15/440799 |
Filed: |
February 23, 2017 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
12512871 |
Jul 30, 2009 |
9578984 |
|
|
15440799 |
|
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B65D 85/8046 20130101;
B65D 85/8043 20130101; A47J 31/0668 20130101 |
International
Class: |
B65D 85/804 20060101
B65D085/804; A47J 31/06 20060101 A47J031/06 |
Claims
1. A method of producing a beverage by using a pad provided with a
first permeable layer and a second permeable layer opposite to the
first permeable layer, further provided with a filling arranged in
between the first and the second permeable layer, the method
including the steps: receiving pressurized water through a
plurality of apertures in the first permeable layer; dissolving,
dispersing, and/or extracting at least part of the filling in the
received pressurized water; releasing through the second permeable
layer the water with the at least part of the filling dissolved,
dispersed, and/or extracted therein; establishing swirling motion
of the water inside the filling, enabled by dimensioning a size of
the apertures and/or by adapting a total number of the plurality of
apertures.
2. The method according to claim 1, wherein the pad comprises: the
first permeable layer; the second permeable layer opposite to the
first permeable layer; the filling arranged in between the first
permeable layer and the second permeable layer; wherein the pad is
arranged for receiving pressurized water through the first
permeable layer, for dissolving, dispersing, and/or extracting at
least part of the filling in the received pressurized water, and
for releasing through the second permeable layer the water with the
at least part of the filling dissolved, dispersed, and/or extracted
therein; wherein the first permeable layer has the plurality of
apertures for receiving the pressurized water, the apertures having
a size dimensioned for establishing swirling motion of the water
inside the filling.
3. A method of producing a chocolate beverage, by using a pad
provided with a first permeable layer and a second permeable layer
opposite to the first permeable layer, the method including the
steps: providing the pad with a filling arranged in between the
first and the second permeable layer, which filling has a weight of
at least 11 grams and contains a chocolate ingredient; receiving
pressurized water through the first permeable layer; dissolving,
dispersing, and/or extracting at least part of the filling in the
received pressurized water; releasing through the second permeable
layer the water with the at least part of the filling dissolved,
dispersed, and/or extracted therein.
4. The method according to claim 3, wherein the filling has a
weight of at least 15 grams.
5. The method according to claim 3, wherein the pad comprises: the
first permeable layer; the second permeable layer opposite to the
first permeable layer; the filling arranged in between the first
and the second permeable layer; wherein the pad is arranged for
receiving pressurized water through the first permeable layer, for
dissolving, dispersing, and/or extracting at least part of the
filling in the received pressurized water, and for releasing
through the second permeable layer the water with the at least part
of the filling dissolved, dispersed, and/or extracted therein;
wherein the filling has a weight of at least 13 grams.
6. The method according to claim 3, wherein the pad comprises: a
first permeable layer; a second permeable layer opposite to the
first permeable layer; a filling arranged in between the first and
the second permeable layer; wherein the pad is arranged for
receiving pressurized water through the first permeable layer, for
dissolving, dispersing, and/or extracting at least part of the
filling in the received pressurized water, and for releasing
through the second permeable layer the water with the at least part
of the filling dissolved, dispersed, and/or extracted therein;
wherein, in use, a solubility of the filling preferably is at least
80 weight percent
7. The method of claim 1, further comprising generating a pressure
difference of between about 0.2 and 2.0 bar between a first
location upstream from and adjacent to the first permeable layer
and a second location downstream from and adjacent the second
permeable layer.
8. The method of claim 7, wherein the pressure difference is
between about 0.4 and 1.4 bar.
9. The method of claim 7, wherein the pad includes a separating
structure extending between the first permeable layer and the
second permeable layer and including a plurality of radially
extending walls and a plurality of circumferentially extending
walls collectively forming a plurality of flow channels.
10. The method of claim 9, wherein the plurality of
circumferentially extending walls define a plurality of recesses
extending between adjacent ones of the plurality of radially
extending walls.
11. The method of claim 3, further comprising generating a pressure
difference of between about 0.2 and 2.0 bar between a first
location upstream from and adjacent to the first permeable layer
and a second location downstream from and adjacent the second
permeable layer.
12. The method of claim 11, wherein the pressure difference is
between about 0.4 and 1.4 bar.
13. The method of claim 3, wherein the pad includes a separating
structure extending between the first permeable layer and the
second permeable layer and including a plurality of radially
extending walls and a plurality of circumferentially extending
walls collectively forming a plurality of flow channels.
14. The method of claim 13, wherein the plurality of
circumferentially extending walls define a plurality of recesses
extending between adjacent ones of the plurality of radially
extending walls.
15. The method of claim 3, further comprising dissolving,
dispersing, and/or extracting at least 60 weight percent of the
filling in the received pressurized water.
16. A method of producing a beverage, comprising: providing a pad
comprising a first permeable layer, a second permeable layer, and a
filling arranged between the first permeable layer and the second
permeable layer; directing pressurized fluid through a plurality of
apertures in the first permeable layer, the filling, and the second
permeable layer, such that the fluid and at least a portion of the
filling exit the second permeable layer, wherein the plurality of
apertures are configured to cause a swirling motion of the fluid
between the first permeable layer and the second permeable layer;
wherein a pressure difference between the fluid prior to entering
the first permeable layer and the fluid after exiting the second
permeable layer is between about 0.2 and 2.0 bar.
17. The method of claim 16, wherein the filling has a weight of at
least 11 grams, and further comprising dissolving at least 60
weight percent of the filling in the fluid.
18. The method of claim 16, wherein the pressure difference is
between about 0.4 and 1.4 bar.
19. The method of claim 16, wherein the pad includes a separating
structure extending between the first permeable layer and the
second permeable layer and including a plurality of radially
extending walls and a plurality of circumferentially extending
walls collectively forming a plurality of flow channels.
20. The method of claim 19, wherein the plurality of
circumferentially extending walls define a plurality of recesses
extending between adjacent ones of the plurality of radially
extending walls.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a divisional of U.S. patent application
Ser. No. 12/512,871, filed Jul. 30, 2009, the entire contents of
which are incorporated herein by reference.
BACKGROUND
[0002] The invention relates to a pad for producing a beverage,
provided with a first permeable layer and a second permeable layer
opposite to the first permeable layer, further provided with a
filling arranged in between the first and the second permeable
layer. The invention further relates to a pad holder provided with
a cavity for receiving the pad. The invention also relates to an
assembly of the pad, the pad holder, and/or a coffee machine. In
addition, the invention relates to a method of producing a beverage
by using a pad provided with a first permeable layer and a second
permeable layer opposite to the first permeable layer, further
provided with a filling arranged in between the first and second
permeable layer.
[0003] Such a pad is known for example from EP 1 398 279. Therein a
pad is described that is suitable for making cappucino. Except for
making coffee-based beverages, there is a need for making other
beverages from pads as well. However, it turns out that for some
beverages, the process of dissolving, dispersing, and/or extracting
the filling by means of the received water is insufficient. As a
result, a rather watery beverage is obtained. This problem limits a
further extension of pad-based beverage generation outside the
domain of coffee-based beverages. Such an extension would be highly
desirable, as machines for pad-based generation of coffee-based
beverages are already widespread. Such an extension thus would
benefit a large amount of people.
SUMMARY
[0004] It is therefore an objective of the invention to provide an
improved pad, which is suitable for making beverages that benefit
from enhanced dissolving, dispersing, and/or extracting of the
filling.
[0005] Accordingly, the invention provides a pad for producing a
beverage, provided with a first permeable layer and a second
permeable layer opposite to the first permeable layer, further
provided with a filling arranged in between the first and the
second permeable layer, wherein the pad is arranged for receiving
pressurized, and preferably hot, water through the first permeable
layer, for dissolving, dispersing, and/or extracting at least part
of the filling in the received pressurized water, and for releasing
through the second permeable layer the water with the at least part
of the filling dissolved, dispersed, and/or extracted therein,
wherein the first permeable layer has a plurality of apertures for
receiving the pressurized water, which apertures have a size
dimensioned for establishing swirling motion of the water inside
the filling. In use, the water will pass the first permeable layer
predominantly through the apertures. As a total area of the
apertures is smaller than a total surface area of the first
permeable layer, a relatively large inflow flowrate of the
pressurized water is realized through the apertures. Due to the
relatively large flowrate, this inflow will experience a relatively
large flow resistance by the filling and/or the second permeable
layer. As a result, part of the water will be deflected sidewards,
i.e. approximately parallel with the first and second permeable
layer, and possibly even in a direction back to the first permeable
layer. In this way a swirling motion of the water inside the
filling can be created. As a result of the swirling motion,
dissolving, dispersing, and/or extracting of the at least part of
the filling in the water is increased.
[0006] When using known pads, normally only a small amount of the
filling is dispersed, which may show up as a small residue in the
beverage after it has left the pad. However, due to the swirling,
significant dispersion may take place inside the pad. Promoting
swirling in this way goes against a common believe that dispersion
of the filling should be avoided, to prevent formation of the
residue in the beverage.
[0007] According to the invention, the apertures have a size
dimensioned for establishing swirling motion of the water inside
the filling. It will be clear to the skilled person that, if the
apertures are too small, the flowrate of the inflow through the
apertures is too small. As a result, too few water will flow
through the pad, or the water may even enter or pass the pad
through other ways than through the apertures. It will further be
clear to the skilled person that, if the apertures are too large,
enough water may flow through the pad, but the increase in inflow
flowrate effected by the apertures will be too small so that no or
only weak jets will be formed.
[0008] Preferably, the apertures have a size dimensioned for
creating jets of the water into the filling. In that way, swirling
motion of the water inside the filling can be obtained, as such
jets relate to a relatively large inflow velocity of the
pressurized water through the apertures.
[0009] It may be clear that permeability of the first permeable
layer is at least caused by the apertures, so that, optionally, the
first permeable layer may be an otherwise impermeable
substrate.
[0010] According to the objective of providing an improved pad, the
invention also provides a pad for producing a chocolate beverage
such as a chocolate drink, provided with a first permeable layer
and a second permeable layer opposite to the first permeable layer,
further provided with a filling arranged in between the first and
the second permeable layer, wherein the pad is arranged for
receiving pressurized, and preferably hot, water through the first
permeable layer, for dissolving, dispersing, and/or extracting at
least part of the filling in the received pressurized water, and
for releasing through the second permeable layer the water with the
at least part of the filling dissolved, dispersed, and/or extracted
therein, wherein the filling has a weight of at least 11 gram,
preferable at least 13 gram, more preferably at least 15 gram and
contains a chocolate ingredient, and wherein, in use, a solubility
of the filling preferably is at least 60 weight percent, more
preferably at least 80 weight percent. Such a solubility may be
obtained by proper adapting of the granular structure of the
filling. For example, a grain size may be adjusted to be in a range
wherein the solubility is achieved. It may be clear to the skilled
person that the solubility is also dependent on the properties of
the pad, such as a permeability and composition of the second
permeable layer, and a thickness of the filling measured in a
direction transverse to the first and second permeable layer.
[0011] In addition, the solubility is dependent on a pressure and
temperature of the, preferably hot, water.
[0012] Experiments performed by the inventor showed that, in
particular, the combination of the filling having a weight of at
least 15 gram, and the solubility being at least 80 weight percent,
yields a chocolate beverage of high quality. A higher weight of the
filling can promote the solubility.
[0013] Preferably, the first permeable layer of the pad for
producing the chocolate beverage has a plurality of apertures for
receiving the pressurized water, which apertures have a size
dimensioned for establishing swirling motion of the water inside
the filling. In this way, one or more advantages of the pad for
producing the beverage can also be obtained for the pad for
producing the chocolate beverage. Such apertures promote reaching a
high solubility, for example the solubility of at least 60 weight
percent or the solubility of at least 80 weight percent.
[0014] Further embodiments and variations may relate to one or both
of the pad for producing a chocolate beverage and the pad for
producing a beverage.
[0015] In an embodiment, the filling contains a milk ingredient,
for example milk powder, and preferably contains a flavour
ingredient. In this way, a milk-based, and preferably flavoured,
beverage can be obtained. In an embodiment, the filling contains a
coffee ingredient, such as roasted and grounded coffee, or instant
coffee. Preferably, the filling contains both the coffee ingredient
and the milk ingredient. The filling containing the coffee
ingredient without any milk ingredient is considered equally
valuable. In an embodiment, the chocolate ingredient is, at least
partly and possibly completely, replaced by the milk ingredient
and/or the coffee ingredient. It has been found that also these
possibilities for the filling may benefit from one or more
advantages of the invention. It is recognized though that beverages
that contain coffee, or milk and coffee (such as cappucino), can
alternatively be made with pads that are not according to the
invention.
[0016] Preferably, a dimension, such as a diameter, of individual
apertures of the plurality of apertures is in a range from 0.2
millimeter to 0.5 millimeter. It was found experimentally by the
inventor that apertures dimensioned in this way, lead to efficient
swirling. Preferably, the apertures have a circular shape.
Alternatively, the apertures may have a rectangular shape. Then,
the dimension of the individual apertures may be a width or length
of the individual apertures. Alternatively, the apertures may have
an approximately ellipsoidal shape. Then, the dimension of the
individual apertures may be a minimum diameter or a maximum
diameter of the individual apertures. It may be clear that other
shapes of the apertures are possible as well.
[0017] In an embodiment, a total number of the plurality of
apertures is arranged for establishing swirling motion of the water
inside the filling. It was recognized by the inventor that the
total number of apertures also influences the inflow flowrate
through the apertures, as the received amount of water is
distributed over the total number of apertures of the pad.
[0018] Preferably, the total number of the plurality of apertures
is in a range from 30 to 70, and preferably is about equal to 50.
It was found experimentally by the inventor that, if the total
number of apertures is within this range, efficient swirling can be
obtained, especially if the dimensions, such as the diameters, of
the individual apertures are in the range from 0.2 millimeter tot
0.5 millimeter.
[0019] In an embodiment, the first permeable layer is substantially
impermeable outside the apertures. Preferably, so that the first
permeable layer is closed except for the apertures. This may
intensify a strength of the swirling, as the pressurized water can
only enter the pad via the apertures, so that the inflow flowrate
is further increased. However, alternatively, there may be an
additional permeability through the first permeable layer outside
the apertures. It may be clear that preferably, in use, a flowrate
enabled by this additional permeability is much smaller than the
inflow flowrate through the apertures.
[0020] In an embodiment, the pad is provided with a separating
structure that forms walls that extend from the first permeable
layer to the second permeable layer and form flow channels that are
mutually separated by the walls, wherein an individual flow channel
extends from at least one aperture of the plurality of apertures to
the second permeable layer. For example, one flow channel is in
fluidum connection with the at least one aperture. Thus, one or
more apertures may give entrance to one flow channel. The walls can
promote that swirling water, that in use is deflected in a
direction approximately parallel with the first and second
permeably layer, will be further deflected in a direction back
towards the first permeable layer. In this way, dissolving,
dispersing, and/or extracting within the pad is further promoted.
By combining the plurality of apertures with the separating
structure, a rather efficient way of dissolving, dispersing, and/or
extracting the at least part of the filling in the water is
enabled.
[0021] Preferably, a cross-sectional area per individual flow
channel, measured in parallel with the first and/or second
permeable layer, is in a range between 0.6 and 1.2 square
centimeter. It was found experimentally by the inventor that in
this way efficient swirling can be achieved.
[0022] In an embodiment, the walls of the separating structure are
provided with a plurality of recesses adjacent to the second
permeable layer. It was experimentally found by the inventor that
in this way more of the filling can be dissolved, dispersed, and/or
extracted in the beverage that is released from the pad, i.e. a
higher brewing yield, or, in other words, a higher solubility, can
be obtained.
[0023] Preferably, the recesses have a depth along the walls of the
flow channels that is in a range from 1 millimeter to 4 millimeter.
This range was found to give an optimal improvement of the brewing
yield, i.e. of the solubility.
[0024] In an embodiment, the separating structure forms a pad side
wall. In this way, it can be prevented that, in use, the filling
will at least partly move out of the separating structure. However,
this may go at the expense of the solubility of the filling.
Therefore, the recesses are especially valuable in this
embodiment.
[0025] In an embodiment, entrance of the pressurized water to
individual flow channels is provided by at most five apertures per
flow channel, preferably by at most two apertures per flow channel,
more preferably by at most one aperture per flow channel. If a
number of apertures per flow channel becomes too large, an
intensifying effect of the walls of the separating structure that
forms the flow channel decreases. This decrease is stronger for
relatively large holes, while this decrease is weaker for
relatively small holes.
[0026] In an embodiment, the apertures have a size dimensioned for
establishing swirling motion of the water inside the filling, while
a pressure of the water near, such as directly before, the first
permeable layer minus a pressure of the beverage near, such as
directly after, the second permeable layer, is in a range from 0.2
to 2.0 bar, and preferably is in a range from 0.4 to 1.7 bar, more
preferably about 0.4 bar, about 1.2 bar, about 1.4 bar, or about
1.7 bar. At least one of such pressure differences may be reached
by means of a coffee machine of the Senseo brand.
[0027] According to an aspect of the invention, the pad is arranged
for producing a chocolate beverage. This aspect is considered to be
of particular importance. On the one hand, chocolate beverages are
likened by many people throughout the world. On the other hand,
chocolate beverages are rather difficult to obtain, in particular
from a dry filling. Therefore, a pad according to the invention is
especially suitable for producing a chocolate beverage.
[0028] In an embodiment, the pad, in a direction perpendicular to
the first and second permeable layer, has a thickness of at least
15 millimeter, preferably of at least 17 millimeter. Compared to
known pads, such a large thickness is exceptional. Choosing such a
thickness is surprising, because such a pad does not fit in known
pad holders of coffee machines, in particular the well known and
popular coffee machines of the Senseo brand. On the other hand,
this thickness contributes to a stronger taste of the beverage,
especially of a chocolate beverage.
[0029] Preferably, the filling is a dry filling. Preferably, the
dry filling has a granular structure. A pad having a dry filling
does not have to be impermeable to water, moisture, and other
liquids during storage. A liquid filling however requires a
protection that needs to be removed or opened, before a beverage
can be made. This would require consumer handling, which leads to
lower convenience and chances of mistakes. An example of a liquid
product is the known `Chocomel Hot` product. A capsule of the
`Chocomel Hot` product contains a liquid concentrate, and needs to
be opened at the top before use, by removing a lid and by piercing
the bottom while placing the capsule in a dedicated capsule
holder.
[0030] It is a further object of the invention to provide an
improved pad holder.
[0031] Accordingly, the invention provides a pad holder provided
with a cavity for receiving a pad according to the invention. By
using such a pad holder, one or more advantages of a pad according
the invention can be realized.
[0032] In an embodiment, the cavity is arranged for receiving the
pad with the second permeable layer facing a bottom part of the
cavity, wherein a depth of the cavity in a direction perpendicular
the second permeable layer is at least 15 millimeter, preferably at
least 17 millimeter. Choosing this depth is surprising, because
such a pad holder is rather different from known pad holders of
known coffee machines, in particular the well known and popular
coffee machines of the Senseo brand. By applying the depth of at
least 15 millimeter, preferably at least 17 millimeter, the pad
having a filling with a weight of at least 11 gram, preferable at
least 13 gram, more preferably at least 15 gram, containing the
chocolate ingredient, fits in the pad holder. Such a fit would not
be obtained when using a conventional pad holder.
[0033] In an embodiment, the bottom part of the cavity is provided
with an outlet for guiding the beverage after it has left the pad,
wherein the pad holder is provided with an element for beating air
into the water after it has left the pad and the outlet, wherein
the element has a length, measured in a direction transverse to the
bottom part of the cavity, of at most 17 millimeter. In this way,
the pad holder can accommodate the pad and still is compatible with
a coffee machine of the Senseo brand.
[0034] It is a further object of the invention to provide an
improved assembly.
[0035] Accordingly, the invention provides an assembly of a pad
according to the invention, a pad holder according to the
invention, and/or a coffee machine. The coffee machine may be the
well known and popular coffee machine of the Senseo brand. Various
types of this coffee machine are known to the skilled person.
[0036] In an embodiment, the cavity has a cavity side wall and the
pad has a pad side wall that connects the first permeable layer and
the second permeable layer, wherein a, preferably impermeable,
portion of the pad side wall that is adjacent to a portion of the
cavity side wall when in use the pad is received by the cavity, has
a curvature that is, preferably slightly, higher than a curvature
of the portion of the cavity side wall. As a result of the
pressurized water, the pad may in use be pressed against the cavity
side wall. Because in this embodiment the curvature of the pad side
wall is slightly higher that the curvature of the cavity side wall,
a, relatively small, first contact area between the pad side wall
and the cavity side wall may exist. As the pad is pressed against
the cavity side wall and is supported in the relatively small first
contact area, a relatively high pressure will be exerted on the
first contact area. This can result in a good seal. In this
embodiment, the curvature of the pad side wall is preferably only
slightly larger than the curvature of the cavity side wall. As a
result, a distance between the cavity side wall and the pad side
wall outside the first contact area is still relatively small.
Thus, a flow resistance along part of the cavity side wall out of
the first contact area is still relatively large. Preferably, the
distance between the cavity side wall and the pad side wall is, in
use, at most 3 millimeter, preferably at most 2 millimeter, more
preferably at most 1 millimeter, for example at most 0.5
millimeter.
[0037] Preferably, the portion of the pad side wall and the portion
of the cavity side wall are located near the second permeable
layer. The cavity side wall preferably has a convex shape. Because
of this, a sealing pressure on the first contact area between the
pad side wall and the cavity side wall is highest near the second
permeable layer. In that way a better seal can be obtained.
[0038] In an embodiment, the pad is provided with a, preferably
circular, projection near the first permeable layer, wherein a top
part of the cavity is provided with a cavity recess that is
dimensioned for, in use, receiving the projection. In this way a
seal can be obtained near the first permeable layer.
[0039] In an embodiment, the pad side wall is formed by the
separating structure. This is considered a convenient way of
forming the pad side wall. If in this embodiment the separating
structure is, along the pad side wall, covered by another layer,
the separating structure is still considered to form the pad side
wall.
[0040] It is another objective of the invention to provide an
improved method of producing beverages that benefit from enhanced
dissolving, dispersing, and/or extracting of the filling.
[0041] Accordingly, the invention provides a method of producing a
beverage, preferably a chocolate beverage, by using a pad provided
with a first permeable layer and a second permeable layer opposite
to the first permeable layer, further provided with a filling
arranged in between the first and the second permeable layer, the
method including the steps: receiving pressurized, and preferably
hot, water through a plurality of apertures in the first permeable
layer; dissolving, dispersing, and/or extracting at least part of
the filling in the received pressurized water; releasing through
the second permeable layer the water with the at least part of the
filling dissolved, dispersed, and/or extracted therein;
establishing swirling motion of the water inside the filling,
enabled by dimensioning a size of the apertures and/or by adapting
a total number of the plurality of apertures. In this way, a
thought of the inventor can be realized, i.e. that by intensifying
flow of the water inside the pad, the at least part of the filling
can be better dissolved, dispersed, and/or extracted in the
water.
[0042] The invention also provides a method of producing a
chocolate beverage, by using a pad provided with a first permeable
layer and a second permeable layer opposite to the first permeable
layer, the method including the steps: providing the pad with a
filling arranged in between the first and the second permeable
layer, which filling has a weight of at least 11 gram, preferable
at least 13 gram, more preferably at least 15 gram and contains a
chocolate ingredient; receiving pressurized, and preferably hot,
water through the first permeable layer; dissolving, dispersing,
and/or extracting at least part, preferably at least 60 weight
percent and/or at least 80 weight percent, of the filling in the
received pressurized water; releasing through the second permeable
layer the water with the at least part of the filling dissolved,
dispersed, and/or extracted therein. Preferably, the method further
includes producing the chocolate beverage by means of a coffee
machine of the Senseo brand. In this way, an inventive thought can
be realized, i.e. that by providing a filling that is surprisingly
heavy for the coffee machine, more chocolate ingredient can be
dissolved, dispersed, and/or extracted in the water.
BRIEF DESCRIPTION OF THE DRAWINGS
[0043] The invention will now be described, in a non-limiting way,
with reference to the accompanying drawings, in which:
[0044] FIG. 1 shows part of a pad for producing a beverage;
[0045] FIG. 1A shows a detail of a pad;
[0046] FIG. 2 shows a top view of a pad;
[0047] FIG. 3 shows an example of a separating structure;
[0048] FIG. 3A shows a side view of a separating structure;
[0049] FIG. 4 shows a pad, a pad holder, and a part of a coffee
machine;
[0050] FIG. 5 shows a pad and a pad holder;
[0051] FIG. 5A shows a first detail of an assembly of a pad and a
pad holder; and
[0052] FIG. 5B shows a second detail of an assembly of a pad and a
pad holder.
[0053] Unless stated otherwise, like reference numerals refer to
like elements throughout the drawings.
DETAILED DESCRIPTION
[0054] FIG. 1 shows part of cross section of a pad 2 for producing
a beverage, in a first embodiment according to the invention. FIG.
1A shows a detail 3 of the pad 2. FIG. 2 shows a top view of the
pad 2. In FIG. 2, the cross section of FIG. 1 is indicated by line
A-A'. The pad 2 has a first permeable layer 4 and a second
permeable layer 6 opposite to the first permeable layer 4. The pad
2 is arranged for receiving pressurized water 8 through the first
permeable layer. A flow direction of the pressurized water 8 before
it has entered the pad, is indicated by arrows 10.
[0055] In use, the pressurized water 8 flows through the pad 2.
Flow lines of the water 8 inside the pad are indicated with arrows
12. During this flow, at least part of a filling 14 of the pad 2 is
dissolved, dispersed, and/or extracted in the water 8. The water 8,
with the at least part of the filling dissolved, dispersed, and/or
extracted therein, is subsequently released through the second
permeable layer 6. (It may be clear that some of the water 8 may
remain inside the pad 2.) Thus, a beverage 16, such as a drink, can
be obtained. In use, the beverage 16 flows towards a cup (this flow
is indicated by arrow 18), so that the beverage 16 can be consumed
by a user of the pad 2.
[0056] Contrary to conventional pads, the first permeable layer 4
is provided with a plurality of apertures 20 for receiving the
pressurized water 8. In the first embodiment, the first permeable
layer 4 is closed except for the apertures 20. This may be achieved
for example by manufacturing the first permeable layer by providing
apertures in an otherwise impermeable substrate. Then, the
apertures 20 cause the permeability of the first permeable layer 4.
It is not excluded however that the first permeable layer is
permeable outside the apertures 20 as well. This can be the case
when the first permeable layer 4 is made from a material that has
some permeability by itself. Then, the permeability of the first
permeable layer 4 is not exclusively caused by the apertures 20.
Preferably, however, the permeability of the first permeable layer
4 is for the largest part caused by the apertures 20.
[0057] In general, the first permeable layer 4 outside the
apertures 20 may include a paper layer covered with a polypropylene
layer. In between the paper layer and the polypropylene layer, a
polyester layer may be provided. Preferably, the polypropylene
layer forms an outer surface of the first permeable layer 4. The
outer surface of the first permeable layer 4 may form an outer
surface of the pad 2. By using such materials for the first
permeable layer 4, closure of the first permeable layer 4 outside
the apertures 20 may be achieved.
[0058] The second permeable layer may, in general, be similar to
and/or include a similar material as the first permeable layer.
This may facilitate a manufacturing process of the pad 2. However,
alternatively, the second permeable layer may be different from
and/or include a different material than the first permeable
layer.
[0059] The apertures 20 have a size dimensioned for establishing
swirling motion of the water 8 inside the filling. Such swirling
motion is schematically indicated in FIG. 1 by the curved arrows
12. By such swirling flow, better dissolving, dispersing, and/or
extracting of the at least part of the filling 14 in the received
pressurized water 8 is achieved. As a result, a larger part of the
filling 14 ends up is the drink 16, instead of being left in the
pad 2. It is noted that the term `swirling motion` is not limited
to a flow pattern as indicated by the curved arrows 12. Instead,
the term `swirling motion` may cover many other flow patterns as
well, which flow patterns may deviate significantly from a rather
uniform flow from the first permeable layer 4 to the second
permeable layer 6. Flow of the water 8 in the filling 14 may be
jet-like in a vicinity of the apertures 20, and be swirling further
away from the apertures. Experiments performed by the inventor
showed that swirling motion may be achieved when a diameter D of
individual apertures of the plurality of apertures is in a range
from 0.2 millimeter to 0.5 millimeter. In the first embodiment, the
apertures have a circular shape with a diameter in the range from
0.2 millimeter to 0.5 millimeter. Other shapes and diameters are
not excluded however.
[0060] In the first embodiment, a total number of the plurality of
apertures 20 is arranged for establishing swirling motion of the
water inside the filling 14. The total number may for example be
visible in a top view of the pad 2, as is shown in FIG. 2.
Experiments performed by the inventor showed that swirling motion
can be achieved when the total number of the plurality of apertures
20 is in a range from 30 to 70, and preferably is about equal to
50.
[0061] When dimensioning the diameter D of the apertures 20 and the
total number of the apertures 20 of the pad 2 for establishing
swirling motion, a certain value of a pressure difference over the
pad 2 has to be used. As a result of this pressure difference, the
water 8 is forced through the pad 2. The pressure difference can be
defined as a pressure of the water 8 near, such as directly before,
the first permeable layer 4 minus a pressure of the drink 16 near,
such as directly after, the second permeable layer 6. For
dimensioning the diameter D of the apertures 20 and the total
number of apertures 20 of the pad 2 in the first embodiment, the
pressure difference can be in a range from 0.2 to 2.0 bar.
Preferably, the pressure difference is in a range from 0.4 to 1.4
bar. For example, the pressure difference is near 0.4 bar, near 1.2
bar, near 1.4 bar, or near 1.7 bar. All such pressure differences
can be used for dimensioning the apertures 20, and for arranging
the total number of the apertures 20 for one pad 2. Most
conveniently, the pressure difference that is normally delivered by
a coffee machine of the Senseo brand is used for dimensioning the
diameter D of the apertures 20 and the total number of apertures 20
for establishing the swirling motion.
[0062] In a second embodiment according to the invention, the pad 2
is arranged for producing a chocolate drink. The pad in the second
embodiment is provided with the first permeable layer 4 and the
second permeable layer 6 opposite to the first permeable layer 4.
The pad 2 is further provided with the filling 14 arranged in
between the first permeable layer 4 and the second permeable layer
6. Analogously to the pad 2 in the first embodiment, the pad 2 in
the second embodiment is arranged for receiving the pressurized
water 8 through the first permeable layer 4. By means of the
received pressurized water 8, at least part of the filling 14 can
be dissolved, dispersed, and/or extracted. In use of the pad 2 in
the second embodiment, the pressure difference over the pad 2 may
be similar as in use of the pad 2 in the first embodiment. Such a
pressure difference may be equal to the pressure difference
normally employed in the coffee machine of the Senseo brand. After
forming the drink 16 by dissolving, dispersing, and/or extracting
the at least part of the filling 14 in the water 8, the drink is
released through the second permeable layer. It may be clear that
part of the drink and/or the received water 8 may remain inside the
pad 2.
[0063] In the second embodiment, the filling 14 has a weight of at
least 15 gram and contains a chocolate ingredient. In this way the
pad 2 can be arranged for forming the chocolate drink 16. However,
a weight of at least 11 gram or at least 13 gram may for example be
possible as well. In the second embodiment, a solubility of the
filling may be at least 80 weight percent. However, a solubility of
the filling may be at least 60 weight percent as well. Such a
solubility is determined at conditions, such as temperature and
pressure, that are normally encountered in a pad in the coffee
machine of the Senseo brand (for example an absolute pressure
between 1 and 2 bar and a temperature of about 80-95 degrees
Celsius). In general, the solubility is most conveniently
determined by the coffee machine of the Senseo brand itself. Then,
the solubility of the filling corresponds with the weight
percentage of the filling that ends up in the beverage. Thus, the
solubility equals the weight of the part of the filling that in use
is removed out of the pad by the hot water, divided by the weight
of the filling before use. It may be clear that not all of the
filling that in use is removed from the filling and ends up in the
beverage needs to be dissolved in the hot water, but that part of
it may be dispersed therein.
[0064] It may be clear that properties of the pad 2 in the first
and second embodiment can be advantageously combined. Then, the pad
2 in the first embodiment for example has the filling 14 of at
least 15 gram, which contains the chocolate ingredient.
Additionally or alternatively, the first permeable layer 4 of the
pad 2 in the second embodiment may have the plurality of apertures
20 for receiving the pressurized water 8, which apertures 20 have
the size dimensioned for establishing the swirling motion of the
water inside the filling 14.
[0065] In a variation of the first and/or second embodiment, the
pad 2 is provided with a separating structure 22. FIG. 3 shows an
example of the separating structure 22. FIG. 3A shows a side view
of the separating structure 22. Note that the separating structure
22 is also visible in FIGS. 1 and 2, but that it is not necessarily
included in the pad 2 in the first embodiment. From FIG. 1 it is
clear that the separating structure 22 forms walls 24 that extend
from the first permeable layer 4 to the second permeable layer 6.
It is also clear from the flow lines 12 in the pad 2 indicated in
FIG. 1, that the separating structure 22 forms flow channels 26
that are mutually separated by the walls 24.
[0066] With reference to FIGS. 1 and 2, a cross-sectional area 28
can be defined for an individual flow channel 26. The
cross-sectional area 28 is measured in a direction that is parallel
with the first permeable layer 4 and/or the second permeable layer
6. In the example of FIGS. 1 and 2, the cross-sectional area 28 of
at least one of the flow channels 26 is in the range between 0.6
and 1.2 square centimeter. In general, the cross-section area 28 of
a majority of the flow channels 26 is in this range. In the
experiments performed by the inventor, it was found that good
dissolving, dispersing, and/or extracting of the at least part of
the filling 14 can be obtained when the cross-sectional area 28 is
within the range between 0.6 and 1.2 square centimeter.
[0067] FIGS. 3 and 3A show that the walls 24 of the separating
structure 22 are provided with a plurality of recesses 30. Note
that not each individual wall is provided with one of the recesses
30, but that some of the walls 24 are free of a recess 30. With the
separating structure 22 being included in the pad 2, the recesses
30 are positioned adjacent to the second permeable layer 6. In the
example of FIG. 3, the recesses have a depth Z, indicated in FIG.
3A, along the walls 24 of the flow channels 26 that is in a range
from 1 millimeter to 4 millimeter, typically 2 millimeter, for
example 2.2 millimeter. The depth Z being around 2 millimeter was
found to give an optimum brewing yield. For the variation of the
pad in the first and second embodiment that is provided with the
separating structure 22, it may be clear that, in order to receive
a substantial amount of the pressurized water 8, an individual one
of the flow channel 26 extends from at least one aperture 20 of the
plurality of apertures 20 to the second permeable layer 6. This
holds true for most of the flow channels shown in FIG. 2. For
example, the at least one aperture 20 may, in use, be positioned
above the flow channel 26. More in general, entrance of the
pressurized water 8 to individual flow channels 26 is provided by
at most five apertures 20 per flow channel 26, preferably by at
most two apertures 20 per flow channel 26, more preferably by at
most one aperture 20 per flow channel 26. From the swirling flow
lines 12 shown in FIG. 1, it is clear that the walls 24 of the flow
channel 26 can influence swirling. Without wanting to be bound by
any theory, it can be expected that, initially, the water 8 flows
into the apertures 20 in a direction towards the second permeable
layer 6. However, when flow is hindered by the filling 14 and/or by
the second permeable layer 6, the water 8 can be expected to flow
sidewards as well. Then, flow of the water 8 can be expected to be
hindered by the walls 24. Subsequently, at least some of the water
can be expected to flow back in a direction towards the first
permeable layer 4. In this way, the separating structure 22 may
intensify the swirling. As a result, an amount of the filling that
is dissolved, dispersed, and/or extracted in the water 8, may be
increased. It may thus be understood that, if entrance of the
pressurized water is provided by too many, e.g. more than five or
more than ten, apertures 20, an intensifying effect of the walls 24
on the swirling may be significantly decreased.
[0068] An additional general advantage of the separating structure
22 is that it can promote a uniform distribution of the pressurized
water 8 over the pad 2. Channeling, i.e. the occurrence of one,
rather narrow, flow path from the first permeable layer to the
second permeable layer, can be substantially prevented by using the
separating structure 22. Such channelling may start by locally
dissolving and/or dispersing the filling by the pressurized water
8. This may significantly increase flow of the pressurized water
near a position where the local dissolving and/or dispersing has
taken place, as a flow resistance is diminished at that position.
The increased flow may further increase the local dissolving and/or
dispersing, which may further diminish the flow resistance at that
position, and so on. As a result, one, rather narrow, flow path may
develop. Such channels may occur at one or a few other positions as
well, but, as a result of channeling, a large part of the filling
may not end up in the beverage so that a rather watery beverage may
be obtained. By means of the, plurality of, flow channels 26, an
amount of flow paths can be created that is similar to a total
number of the flow channels 26. In general, the total number of
flow channels 26 for example is in a range from 20 to 60, for
example typically 40.
[0069] FIGS. 4 and 5 show a pad holder 38 in an embodiment
according to the invention. The pad holder 38 fits in the coffee
machine of the Senseo brand. A part of this coffee machine is shown
in FIG. 4, with reference number 34. The pad holder 38 has a cavity
40 for receiving the pad 2 in the first embodiment, the second
embodiment, or a variation thereof. The pad holder 38 is arranged
for receiving the pad 2 with the second permeable layer 6 facing a
bottom part 42 of the cavity 40. A depth C of the cavity 40 in a
direction perpendicular the second permeable layer 6 may be at
least 17 millimeter, preferably about 18 or about 19 millimeter.
The depth C is measured from a level of a cavity recess 44 in the
cavity 40 to a highest level of the bottom part 42 of the cavity
40. The highest level of the bottom part 42 of the cavity 40 may be
formed by a top of projections 46 of the bottom part 42.
[0070] FIGS. 4 and 5 also shows the pad 2 in the first or the
second embodiment. The pad 2 may have, measured from the outer
surface of the first permeable layer 4 to an outer surface of the
second permeable layer 6 in a direction perpendicular to the first
and/or second permeable layer 4, 6, a thickness W of at least 17
millimeter, for example about 17.2 millimeter or about 17.6
millimeter.
[0071] In the example of FIGS. 4 and 5, the (bottom part of the)
cavity is provided with an outlet 48 for guiding the water after it
has left the pad. In addition, the pad holder may be provided with
an element for beating air into the chocolate beverage after it has
left the pad and the outlet. Thereto, more in general, the outlet
48 may be connected with a collecting unit 49 of the pad holder 38.
The collecting unit 49 is provided with an impact element and a
chamber. When the beverage flows out of the outlet 48, it may hit
the impact element and subsequently may impact against inner walls
of the chamber. In this way, air can be beaten in the beverage.
This may give a fine-bubble foam layer on the beverage. This is
liked by many users, especially for chocolate drinks. Structure and
working of the collecting unit 49 is described i.a. in EP
1,371,311. It will be appreciated that, in comparison with known
pad holders for the coffee machine of the Senseo brand, a dimension
of the collecting unit 49 measured in a direction perpendicular to
the bottom part 42 of the cavity 40 of the pad holder 38, is
significantly decreased, preferably decrease by at least 3
millimeter, for example decreased by about 3.7 millimeter. In this
way the pad 2 with the thickness W of at least 17 millimeter fits
in the pad holder 38.
[0072] The pad 2 and the pad holder 38 of FIGS. 4 and 5 form an
assembly in an embodiment according to the invention. The cavity 40
has a cavity side wall 50, shown in FIG. 5. The pad 2 has a pad
side wall 52 that connects the first permeable layer 4 and the
second permeable layer 6. In use, when the pad 2 is received by the
cavity 40, an impermeable portion of the pad side wall 52 may be
adjacent to a portion of the cavity side wall 50. In the example of
FIG. 5, both these portions are indicated by means of a first
detail 54 of the assembly, which is also shown in FIG. 5A. FIGS. 5
and 5A show that a curvature of the impermeable portion of the pad
side wall 52 is slightly higher than a curvature of the portion of
the cavity side wall 50. In this way, an effective seal can be
obtained in a first contact area 56 between the impermeable portion
of the pad side wall 52 and the portion of the cavity side wall 50.
In FIGS. 4 and 5, the impermeable portion of the pad side wall 52
and the portion of the cavity side wall 50 are located near the
second permeable layer 6. The pad side wall 52 may be formed by the
separating structure 22. In this way a good seal can be obtained on
the first contact area 56.
[0073] In a variation, the pad 2 may be provided with a, preferably
circular, projection 58 near the first permeable layer 4.
Preferably, the cavity recess 44, provided in a top part of the
cavity 40, is dimensioned for receiving the projection 58. This is
further illustrated in FIG. 5B, which shows a second detail 60 of
the assembly of the pad 2 and the pad holder 38, indicated in FIG.
5. When, in use, the pressurized water 8 is received by the pad 2,
the projection 58 can be pushed against the wall of the pad holder
in the cavity recess 44. In this way, a second contact area 62
between the pad 2 and the pad holder 38 is obtained which, in use,
will form a seal as well.
[0074] By having sealing contact between the pad 2 and the pad
holder 38 at the first contact area (i.e. near a bottom part of the
cavity 40) and the second contact area (i.e. near a top part of the
cavity 40), bypass of the pressurized water 8 in between the pad 2
and the pad holder 38 can be largely prevented. Such bypass is
schematically indicated in FIG. 5 by arrow 64.
[0075] The pad 2, the pad holder 38, and/or the coffee machine 34
can be used in a first embodiment of a method according to the
invention (the first method). The first method may include
producing the beverage, preferably the chocolate beverage, by using
the pad 2 provided with the first permeable layer 4 and the second
permeable layer 6 opposite to the first permeable layer 4, which
pad 2 is further provided with the filling 14 arranged in between
the first permeable layer 4 and the second permeable layer 6. The
first method includes receiving the pressurized water 8 through the
plurality of apertures 20 in the first permeable layer. In the
first method, at least part of the filling 14 is dissolved,
dispersed, and/or extracted in the received pressurized water 8.
Subsequently, the first method includes releasing through the
second permeable layer 6 the beverage, i.e. the water 8 with the at
least part of the filling 14 dissolved, dispersed, and/or extracted
therein. The first method further includes establishing swirling
motion of the water inside the filling. This is enabled by
dimensioning a size, e.g. the diameter D, of the apertures 20
and/or by adapting the total number of the plurality of apertures
20 in the pad 2.
[0076] Additionally or alternatively, the pad 2, the pad holder 38,
and/or the coffee machine 34 can be used in a second embodiment
according to the invention (the second method). The second method
may include producing the chocolate drink 16, by using the pad 2
provided with the first permeable layer 4 and the second permeable
layer 6 opposite to the first permeable layer 4. The second method
includes providing the pad 2 with the filling 14 arranged in
between the first and second permeable layer, which filling 14 has
a weight of at least 11 gram, preferably at least 13 gram, more
preferably at least 15 gram and contains the chocolate ingredient.
Preferably, the filling contains at least 11 gram, more preferably
at least 13 gram, in particular at least 15 gram of the chocolate
ingredient. In the second method, the pressurized water 8 is
received through the plurality of apertures 20 in the first
permeable layer 4. The second method may further include the step
of dissolving, dispersing, and/or extracting at least 50 weight
percent, preferably at least 65 weight percent, more preferably at
least 80 weight percent of the filling 14 in the received
pressurized water. In this way the chocolate drink 16 can be
formed. The second method may further include releasing through the
second permeable layer 6 the chocolate drink 16, which contains the
water with at least 60 weight percent, preferably at least 80
weight percent of the filling 14 dissolved, dispersed, and/or
extracted therein.
[0077] It is also important to note that the construction and
arrangement of the elements of the pad, pad holder, assembly, and
method for producing a beverage as shown in the preferred and other
exemplary embodiments are illustrative only. The invention is not
limited to any embodiment herein described and, within the purview
of the skilled person, modifications are possible which may be
considered within the scope of the appended claims. Equally all
kinematic inversions are considered inherently disclosed and to be
within the scope of the present invention. The use of expressions
like: "preferably", "more preferably", "in particular",
"typically", "especially", etc. is not intended to limit the
invention. The indefinite article "a" or "an" does not exclude a
plurality. Features which are not specifically or explicitly
described or claimed may be additionally included in a product or a
method according to the present invention without deviating from
its scope.
[0078] Although only a few embodiments of the present invention
have been described in detail in this disclosure, those skilled in
the art who review this disclosure will readily appreciate that
many modifications are possible (e.g., variations in sizes,
dimensions, structures, shapes and proportions of the various
elements, values of parameters, mounting arrangements, materials,
colors, orientations, etc.) without materially departing from the
novel teachings and advantages of the subject matter recited in the
claims. Accordingly, all such modifications are intended to be
included within the scope of the present invention as defined in
the appended claims. The order or sequence of any process or method
steps may be varied or re-sequenced according to alternative
embodiments. In the claims, any means-plus-function clause is
intended to cover the structures described herein as performing the
recited function and not only structural equivalents but also
equivalent structures. Other substitutions, modifications, changes
and/or omissions may be made in the design, operating conditions
and arrangement of the preferred and other exemplary embodiments
without departing from the spirit of the present invention as
expressed in the appended claims.
* * * * *