U.S. patent application number 13/744623 was filed with the patent office on 2013-05-23 for portion capsule having an identifier.
This patent application is currently assigned to K-FEE SYSTEM GMBH. The applicant listed for this patent is K-FEE SYSTEMS GMBH. Invention is credited to Marc KRUGER.
Application Number | 20130129872 13/744623 |
Document ID | / |
Family ID | 45496540 |
Filed Date | 2013-05-23 |
United States Patent
Application |
20130129872 |
Kind Code |
A1 |
KRUGER; Marc |
May 23, 2013 |
PORTION CAPSULE HAVING AN IDENTIFIER
Abstract
A portion capsule for producing a beverage includes a base
element having a cavity in which a beverage raw material is
provided and which is closed by a membrane fastened to the base
element.
Inventors: |
KRUGER; Marc;
(Bergisch-Gladbach, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
K-FEE SYSTEMS GMBH; |
Bergisch Gladbach |
|
DE |
|
|
Assignee: |
K-FEE SYSTEM GMBH
Bergisch Gladbach
DE
|
Family ID: |
45496540 |
Appl. No.: |
13/744623 |
Filed: |
January 18, 2013 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/EP2011/003677 |
Jul 22, 2011 |
|
|
|
13744623 |
|
|
|
|
Current U.S.
Class: |
426/115 |
Current CPC
Class: |
B65D 2203/06 20130101;
B65D 2203/10 20130101; B65D 85/8043 20130101; A47J 31/4492
20130101; B65D 65/466 20130101 |
Class at
Publication: |
426/115 |
International
Class: |
B65D 85/804 20060101
B65D085/804 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 22, 2010 |
DE |
10 2010 031 988.0 |
Sep 2, 2010 |
DE |
10 2010 044 251.8 |
Feb 7, 2011 |
DE |
10 2011 010 534.4 |
Claims
1. Portion capsule for producing a beverage, comprising a base
element having a cavity in which a beverage raw material is
provided and which is closed by a membrane fastened to the base
element, and the base element comprising a flange, wherein the
flange has an identifier in order to individualize the respective
portion capsule, characterized in that the identifier is a
gearwheel or a gearwheel's section, which is placed at the outer
circumference of the flange.
2. Portion capsule according to claim 1, characterized in that the
teeth of the gearwheel or the gearwheel's segment are provided to
be shaped substantially like a triangle, rectangle, quadrate or a
wave.
3. Portion capsule according to claim 1, characterized in that a
sealing surface is provided at the flange.
4. Portion capsule according to claim 1, characterized in that the
identifier is provided in the membrane.
5. Portion capsule according to claim 4, characterized in that the
membrane's outer area has means for fit locking.
6. Portion capsule according to claim 1, characterized in that a
filter element, which divides the cavity into a first region for
accommodating the beverage raw material and a second region for
accommodating a beverage extract, is arranged within the
cavity.
7. Portion capsule according to claim 6, characterized in that the
filter element is made of a non-woven material.
8. Portion capsule according to claim 1 for use in preparing a hot
beverage.
9. Portion capsule according to claim 4, characterized in that the
membrane's outer area has a gearwheel.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a Continuation of International
Application No. PCT/EP2011/003677, filed on Jul. 22, 2011, entitled
PORTION CAPSULE HAVING AN IDENTIFIER which application is hereby
incorporated by reference in its entirety.
BACKGROUND
[0002] The present invention relates to a portion capsule for
producing a beverage, comprising a base element having a cavity in
which a beverage raw material is provided and which is closed by a
membrane fastened to the base element.
[0003] Such capsules are well known and are being launched onto the
market in abundant variety. Since these capsules are often quite
similar, it is possible that the manufacturer's capsules are used
in a coffee machine designed by another manufacturer, although they
are not suited for it. This may result in significant security
issues and/or the coffee machine may be damaged.
[0004] The object of the present invention is therefore to provide
a portion capsule which only is suitable for a specific coffee
machine.
SUMMARY
[0005] The object is accomplished according to the present
invention by a portion capsule for producing a beverage, comprising
a base element having a cavity in which a beverage raw material is
provided and which is closed by a membrane fastened to the base
element, wherein it has an identifier, which allows to
individualize the respective portion capsule.
[0006] The present invention relates to a capsule for producing a
beverage or foodstuff, comprising a base element having a cavity in
which a beverage raw material is provided. Such capsules are, for
example made of plastic, natural materials and/or biodegradable
materials and substantially have a base element, in particular a
deep-drown base element, i.e. it is substantially designed
frustoconically or cylindrically. The beverage raw material is
arranged within the portion capsule's cavity and is extracted
and/or dissolved in a liquid, in particular water. After the
beverage raw material has been filled into the cavity the base
element is usually sealed by a membrane. In particular the membrane
is localized on the opposite side of the base element's bottom. The
membrane can be made of the same or different material as the base
element and is substantially attached to the base element using a
sealing and/or an adhesive bonding. Additionally the cavity could
contain one or several built-in elements, such as, for example a
filter, a non-woven, a felt, a shut-off device and/or something
similar to those. For the case that a non-woven and a felt are
arranged within the cavity, they are interconnected preferably. The
non-woven and/or the felt can be made of several layers in such a
way that the layers may differ in the kind of its starting material
and/or its preparation. Moreover the membrane and/or the bottom can
be provided with a plurality of recesses (holes).
[0007] According to the present invention, it is provided that the
portion capsule has an identifier that allows to individualize the
respective portion capsule. In the context of this invention
individualizing means that the respective portion capsule can be
assigned to a group of capsules that are suitable for the coffee
machine preferably. It is not necessary that the coffee machine is
able to specify and/or identify the portion capsule. In fact it is
much more important that the coffee machine associates the portion
capsule with a group of portion capsules, which is suitable for the
coffee machine. In particular, individualizing means that those
portion capsules that are not appropriate for the coffee machine
cannot be inserted into and/or directly fall through the holder,
which is designed for the portion capsules in the coffee machine,
and/or the coffee machine operates only with the corresponding
portion capsules. Preferably a sensor/detection system handles the
identifier and compares it with a stored reference substantially.
Preferably, the coffee machine, in particular the
water-providing-pressure pump, will be activated if the detected
identifier matches with the reference. Otherwise the coffee machine
will not start operating. Preferably the detection system is placed
in the region of the coffee machine's media chute designed for the
portion capsules. According to another preferred embodiment of the
invention, the detection system may be placed in the region of the
brewing chamber. Another possible embodiment of the invention
provides that the identifier prevents portion capsules from
inserting into the coffee machine. Alternatively or additionally,
means, in particular mechanical means, more preferably, one or more
gearwheels, may be added to the media chute in order to guarantee
that incorrect portion capsule cannot be inserted into the coffee
machines by passing the media chute.
[0008] Preferably the identifier is composed of surface areas
having different optical properties, for example reflection. These
surfaces may be localized on the membrane, the side wall and/or the
bottom of the portion capsules. Preferably, the portion capsule has
at least two areas which differ in their optical properties, for
example the reflection characteristics.
[0009] The detection of a recess and/or a bulge is also preferred.
Preferably, recess and bulges alternate and/or at least two
recesses or bulges are separately placed from each other.
Especially it is possible that the recess and/or the bulge form a
gearwheel that is attached to the outer border and/or at least
partially extends to the wall region of the portion capsule. The
recess and/or bulge may be produced by any shaping method, for
example by deep drawing, preferably.
[0010] Furthermore, the recess may be realized by removing
material. In particular the material's remove can be accomplished
by punching or using a laser on condition that this processing does
not damage a barrier layer placed in the portion capsule's
material, which prevents moisture or aroma from escaping out of the
portion capsule and/or water vapor or oxygen enters the capsule.
The reading of the identifier, which is encoded in the recess
and/or bulge, may be a result from a mechanical and/or optical
method, for example. Alternatively or additionally, the identifier
can be used to avoid that the portion capsule is inserted into the
coffee machine. This applies in particular to the media chute. For
example it is possible to design a portion capsule comprising a
ring gear that is placed on its circumference and is compatible
with another ring gear, which is placed in the media chute. If the
media chute's ring gear only revolves for a corresponding ring gear
of the portion capsule and its revolving allows the portion capsule
to pass, only portion capsules equipped with the proper ring gear
will pass the insertion lock.
[0011] According to a further subject matter of a preferred
development of the present invention, the identifier may be
included in the membrane. Preferably, the identifier is a layer or
partial layer of the membrane. Such identifiers may be an optically
detectable material, for example a fluorescent material.
Furthermore, the identifier may be designed with layers made of
metal or ferrous metal or stripes made of metal or ferrous metal in
or on the membrane, respectively.
[0012] Preferably the identifier is a machine-readable imprint.
This is realized with a print in food approved color, preferably.
Fluorescent materials like paper or print materials, whose optical
properties change under the influence of temperature, are favored
also. Preferably the print is a barcode, a logo or a rapport.
[0013] According to a further subject matter of a preferred
development of the present invention, the identifier is an
electrically conductive section, which can be placed all over the
portion capsule, but is localized on the side wall, the edge and/or
the floor preferably. The electrically conductive section, which is
inserted into the coffee machine, can become part of an electric
circuit and causes therefore a measurable change, which leads to
the identification of the respective portion capsule. In a further
preferred embodiment, the identifier is a section made of a
ferromagnetic material.
[0014] Another construction version favors a RFID chip being the
identifier.
[0015] If the portion capsule is customized according to the
invention, portion capsules that are not in line with the coffee
machine will be prevented from inserting into the coffee machine.
Furthermore it is possible that the identifier allows to identify
the portion capsule located in the brewing chamber in such a way
that the production process of beverage or food may be controlled,
for example by adjusting the temperature, the pressure and/or the
amount of water.
[0016] According to a further subject matter of a preferred
development of the present invention, the portion capsule's
material is weakened in the bottom area caused by a selective
material removal, for example by using a laser. The weakening is
provided for piercing the portion capsules using a mandrel. This
procedure is needed for the beverage's preparation. Since the
material is weakened in the section, which is treated with a laser
and is supposed to be pierced using the mandrel, the degree of
necessary force for piercing the portion capsule is reduced. The
mandrel of such coffee machines is usually equipped with a force
limitation that limits the force, which is dedicated for pressing
the mandrel against the portion capsule's bottom. This preparation
avoids that portion capsules having no appropriate weakening can be
used in such a coffee machine. Consequently the weakening
represents another kind of identifier.
[0017] According to a further subject matter of a preferred
development of the present invention, the portion capsule has an
edge region, which is preferably attached to the base element.
Preferably, the edge is located opposite of the base element's
bottom area. After the raw material has been filled in the portion
capsule, a membrane can be attached to this edge region, for
instance. Moreover the edge can also designed for guiding the
portion capsule into the chute in order to position the portion
capsule in the brewing chamber properly. Simultaneously it is
possible to use the surface of the edge for stopping and/or
sealing.
[0018] Preferably provision is made for the portion capsule to have
means for fit locking, friction locking and/or detection in the
edge region. The means for fit locking and/or friction locking may
be used to activate a complementary mechanism, which is located in
the coffee machine, in order to allow inserting the portion capsule
into the coffee machine and/or starting a sensor, like a gearwheel,
that transmits a signal to a control unit depending on whether the
portion capsule corresponds to the coffee machine or not.
Alternatively or additionally, a detector may identify the mean for
fit locking, friction locking and/or detection in order to check
that the portion capsule is suitable to the respective coffee
machine.
[0019] Preferably the means for fit locking, friction locking
and/or detection is a gearwheel or a gearwheel' segment, which are
located, in particular, in the outer area of the edge region. The
teeth of the gearwheel or the gearwheel' segment may be shaped in
any commonly used form, which is known, for example, by an expert
from gear manufacturing. Preferably it is provided that these teeth
are triangular, rectangular, square or wavy.
[0020] Preferably there is a sealing surface, that is arranged on
the interior side relative to the gearwheel or the gearwheel'
segment.
[0021] Another and preferred state-of-the-art technology is a
portion capsule for producing a beverage, comprising a base element
substantially designed frustoconically or cylindrically, having a
cavity in which a beverage raw material is provided and which is
closed by a membrane fastened to the base element with the base
element having a wall region and the base element having a bottom
area, which is preferably located opposite to the membrane, with
the wall region having several grooves and the grooves which are
located between membrane and bottom area covering the wall region
along its height at least partially. The grooves may be also
located in the edge region, in particular on the outer area of the
edge region.
[0022] This portion capsule has the advantage over the portion
capsule according to the state-of-the-art technology that, for
instance, the grooves reinforce the base element's wall region. On
the one side these grooves make the portion capsule more stable
towards mechanical forces and prevent the portion capsule from
deformation and buckling, in particular. The arrangement of the
grooves, which are located at the wall region, additionally
improves the performance of the portion capsule while the
extraction liquid flows through it in the brewing chamber, since
the arrangement of the grooves, in particular those partially
expending over the wall region between membrane and bottom area,
increase quality and reliability of the extraction process
significantly. According to the invention another advantage is that
the base element's thickness can be reduced, because the use of
grooves improves the physical stability. The production of the
portion capsule is therefore much less expensive and more
environmentally friendly. On the other side the grooves reduce or
avoid the contact between the portion capsule's wall region and the
wall of the brewing chamber. As a result ejecting or removing the
portion capsule from the brewing chamber is made easier. Another
advantage of using a plurality of grooves is that the stream of the
extraction liquid, which flows along the base element in the
cavity, can be optimized by choosing a grooves' structure that is
able, for example, to generate on the one hand a better or stronger
turbulence in the extraction liquid or on the other hand a more
uniform (laminar) flow of the extraction liquid, in the wall
region. The control of the liquid may be obtained by the structure
of the grooves itself or by using simple means additionally. A
stronger turbulence compared to the one known in the
state-of-the-art has the advantage that no unintended and casual
main streams are formed in the raw materials. Instead the
extraction liquid equally flows through the raw material in all of
the volume. Thus the extraction process is much more efficient and
can be controlled more precisely and reproducibly.
[0023] In particular the raw material may be coffee powder
(especially ground roasted coffee), chocolate powder, milk powder,
tea or the like. Alternatively, it is conceivable that the raw
material is a beverage's extract, such as instant coffee for
example.
[0024] In particular, the grooves are recesses and bulges, which
are preferably directed along a main extension and are preferably
extended along the wall portion or the periphery of the edge
region. More preferably, the grooves are formed as webs and/or
notches. A gearwheel, for instance, may be obtained by the grooves.
Therefore the grooves are part of the base elements' wall,
optionally located on the inner side facing to the cavity and/or on
the outside facing away from the cavity.
[0025] According to a preferred embodiment of the present
invention, it is provided that the grooves form an identifier that
allows individualizing the portion capsule. In the context of this
invention individualizing preferably means that the respective
portion capsule can be assigned to a group of capsules that are
suitable for the respective coffee machine or the machine producing
a beverage. It is not necessary that the coffee machine or the
device for producing a beverage is able to specify and/or identify
the portion capsule. It is more important that the device for
producing a beverage, in particular a coffee machine, associates
the portion capsule with a group of portion capsules, which is
appropriate for the respective device for producing a beverage, in
particular a coffee machine. In particular, individualizing means
that those portion capsules that are not appropriate for the coffee
machine (or the device producing the beverage) cannot be inserted
into and/or directly fall through the holder, which is designed for
the portion capsules in the coffee machine (or the device producing
the beverage), and/or the coffee machine (or the device producing
the beverage) operates only with corresponding portion capsules
("proper portion capsule"). In particular, individualizing means
that the coffee machine or the device producing the beverage will
not operate properly in the intended use, if the used portion
capsule is not customized according to the invention. Preferably a
sensor/detection system, attached to the coffee machine or the
device producing the beverage, records the identifier and
substantially compares it with a stored reference. In particular,
it is possible that such an identification process is based on a
mechanical fitting, especially a fitting of a gearwheel or of a
contour comparable with a gearwheel, which is attached to the
device producing the beverage or the coffee machine and interacts
with the portion capsule. It is preferred that the device for
producing the beverage or the coffee machine only will operate, if
the identifier matches to the reference or the mechanical fittings
match with each other. In this case the device for producing the
beverage particularly starts to operate, especially activates a
pressure or water pump. The mean for detection or mechanical
fitting is preferably located in the region of the media chute or
in the region of the device for producing the beverage.
Alternatively the identifier or the mechanical fitting may avoid
that an unsuitable portion capsule is inserted into the device for
producing the beverage. A portion capsule, which is designed in
accordance with the invention, makes it possible that a portion
capsule that is not designed for the device for producing a
beverage cannot be inserted into it. Additionally the identifier
allows that the device for producing the beverage, especially the
coffee machine, may specify the sort of the portion capsule and
thereby control the production process of beverage and food by
adapting, for example, the pressure, the temperature and/or the
amount of water.
[0026] According to a further preferred embodiment of the present
invention, it is provided that at least a part of the grooves and
at least in a subarea parallel to the main plane of the membrane is
gearwheel shaped.
[0027] According to the present invention it is an advantage that
it is possible to increase the stability of the portion capsule's
wall region, to realize improved turbulences of the extraction
liquid and thereby to improve the extraction's process under the
same conditions, for example, such as material thickness and the
like. Another advantage is that it is easy to generate a mechanical
identifier or a mechanical fitting that matches with a fitting tool
that belongs to the device for producing a beverage. According to
the invention it is an further advantage that, for example, a
gearwheel, which is attached to the device for producing a beverage
and is, for example, located in the region of the media chute or
similar, can possibly interacts with the gearwheel's contour of the
portion capsule. In this way it is possible to generate a
mechanical fitting that allow to individualize the portion capsule
as a proper one and/or to specify the sort of portion capsule
and/or to rotate the portion capsule about an axis of rotation,
that is perpendicular to the membrane's main plane, by using the
gearwheel's arrangement. Such an embodiment of the invention makes
it possible that the portion capsule is always opened with the
device for producing a beverage on the same spot (with respect to
its angular position) and therefore the raw material is extracted
on the same manner. Moreover the grooves prevent the portion
capsule from being inserted into the coffee machine.
[0028] In a preferred version of the invention, it is provided that
there is a flange/edge region being averted from the bottom region,
for fixing the membrane to the base element, where in the wall
region between flange/edge region and bottom region preferably has
a border and the grooves are being preferably extended to this
border.
[0029] Because of this it is another advantage according to the
invention that on the one hand the wall region can be constructed
in a stable and reinforced manner and on the other hand the
gearwheel shaped contour of the grooves, located at the wall
region, is able to absorb a relative high load. With that it is
possible that the portion capsule can be rotated easily and without
any damaging of the portion capsule within the device for producing
a beverage. Preferably the base element's diameter is enlarged in
the border's region compared to the wall region, which range from
the border to the bottom region.
[0030] This gives rise to the advantageous possibility to stack
portion capsule or portion capsules' base elements easily and
robustly.
[0031] Moreover it is preferred that at least a part of the grooves
are gearwheel shaped and at least a plane, which is at least
partially gearwheel shaped, is parallel to the membrane in such a
way that the gearwheel shaped contour expands over the borders or
the flange/edge region.
[0032] Further preferred versions of the present invention relate
to portion capsules that implement one or more of the following
characteristics: [0033] the base element tapers in the direction of
the flange in the border's region, [0034] the grooves directed
toward the bottom region expand over the border's region, [0035]
the grooves approximately cover 20%-80%, preferably 40%-60% of the
wall region, which is placed between the border and the bottom
region, [0036] the grooves are constructed in such a way that the
wall region is reinforced and/or the grooves causes an extraction
liquid's turbulence in the cavity.
[0037] Other preferred versions of the present invention relate to
portion capsules that are manufactured in such a way that the ratio
of the diameter of that wall region of the base element which
adjoins the flange to the diameter of the flange is between 0.85
and 0.89, and in particular substantially 0.87.
[0038] In a preferred version the wall region's diameter, which is
adjacent to the flange, is 39 millimeter and the flange's diameter
is 45 millimeter. Another advantageous version of the invention
prefers a base element having a thicker wall region in the border's
region compared to the wall region between bottom region and
flange. Since the portion capsule's design, which contains grooves
in the wall region, improve its stability, it is possible to save
material by manufacturing the portion capsule and therefore to
reduce cost and energy required for manufacturing the portion
capsules.
[0039] According to the invention it is further provided that a
filter element is arranged into the cavity. Such a filter element
divides the cavity into a first region for accommodating the
beverage raw material and into a second region for accommodating a
beverage extract. In particular, it is provided that the filter
element is made of a non-woven material.
[0040] According to a further subject matter or a preferred
development of the present invention the portion capsule according
to the invention is intended for the preparation of a hot beverage.
In the following the invention is explained based on the FIGS.
1-22. These explanations do not restrict the general idea of the
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0041] FIG. 1 shows a portion capsule containing sections that
differs optically.
[0042] FIG. 2 shows a portion capsule containing a barcode.
[0043] FIG. 3 shows a portion capsule with recesses and bulges.
[0044] FIG. 4 shows a portion capsule containing sections that
differs optically.
[0045] FIG. 5 shows a portion capsule with a key function.
[0046] FIG. 6 shows a portion capsule's wall that is electrically
conductive.
[0047] FIG. 7 shows a portion capsule's wall containing sections
that differs optically.
[0048] FIG. 8 shows an enlarged pot construction of the portion
capsule's wall.
[0049] FIG. 9 shows an edge region that is electrically
conductive.
[0050] FIG. 10 shows a portion capsule containing a bottom that is
electrically conductive.
[0051] FIG. 11 shows an embodiment containing a layer that can be
detected by a metal detector.
[0052] FIG. 12 shows a metallic strainer.
[0053] FIG. 13 shows a portion capsule containing a ferromagnetic
section.
[0054] FIG. 14 shows a portion capsule containing a barcode.
[0055] FIG. 15 shows a portion capsule containing a section, which
is electrically conductive, in the wall.
[0056] FIG. 16 shows a portion capsule with a gearwheel placed in
the brewing chamber.
[0057] FIG. 17 a-c show different embodiments of the portion
capsule according to FIG. 16.
[0058] FIG. 18 shows the portion capsule according to the FIGS. 16
and 17, when the portion capsule is fit locking with a
gearwheel.
[0059] FIGS. 19 and 20 show a schematic view of a portion capsule
according to an embodiment of the presented invention.
[0060] FIGS. 21 and 22 show two sectional views of the portion
capsule according to an embodiment of the presented invention.
DETAILED DESCRIPTION
[0061] The view illustrated on the right side of FIG. 1 shows a
portion capsule 1 comprising a base element 2 that has a wall
region 2.1 and a bottom area 2.2. The wall region 2.1 and the
bottom area 2.2 define a cavity, which may include the raw material
and perhaps a built-in element. After filling the cavity is sealed
by a membrane, which is preferably attached to the edge region 2.4
of the base element using seal or glue. This portion capsule can be
inserted into a brewing chamber shown in FIG. 12, with a liquid, in
particular water, flowing through it. During this process the raw
material is extracted or dissolved and therefore the beverage is
produced. According to the invention the portion capsule has only
one identifier that allows to determinate whether the respective
portion capsule goes with the coffee machine's brewing chamber and
the parameters for processing are chosen properly. If it is not the
case, significant security issues arise. Inserting the wrong
portion capsule, for example, endanger the brewing chamber's
tightness. In this case hot water can be discharged under high
pressure and therefore compromise the user's safety. Otherwise it
is also possible that inserting the wrong portion capsule damages
the coffee machine. In this example the identifier is represented
by several raised areas 8, which differ in reflection properties
from the sections between the raised areas. As shown by the arrows
the bulges are passed by a mean for detection (here: an optical
detector) that is able to differentiate between the unequal
sections 5, 6 having different optical properties such as, for
example, reflection. Switching between the different sections or
the number of bulges represents the identifier. After the
identifier has been read out the identifier is compared to a stored
reference. If the identifier agrees with the reference, the coffee
machine will start operating. Particularly the pump, which is for
example responsible for pushing hot water through the brewing
chamber, will not start operating, if the identifier does not agree
with the reference.
[0062] All the remarks concerning the identifier apply to all the
examples.
[0063] FIG. 2 shows another embodiment of the portion capsule
according to the invention. Here the portion capsule has a barcode
placed in the area of the membrane's top surface. This bar-code may
be printed by material removal or may be generated by a medium that
is integrated in the foil and can be detected optically such as a
fluorescence agent. Alternatively metal rings may be part of the
foil or attached to the foil. The bar-code's section may be made of
a ferromagnetic material. As shown by the arrow 15 the bar-code
alternatively can be attached to the base element's edge region
being averted from the membrane. Such a bar-code is read out by a
detector 13 placed, for example, in the media chute. The bar-code
represents the identifier according to invention.
[0064] FIG. 3 shows another embodiment of the portion capsule
according to the invention. In the present case the identifier
comprises recesses and bulges, which result from material removal
or reshaping the portion capsule as shown here by the example of
the portion capsule's wall 2.1. In the present case recesses and
bulges interact with a mean for detection 13, which operates like a
key, wherein the coffee machine only start operating, when all
elements 13 are placed in the respective recess. Therefore an
electric circuit may be changed or especially closed.
[0065] FIG. 4 shows an embodiment of the portion capsule being
substantially identical to the embodiment illustrated in FIG. 1. As
an alternative version of the invention the figure additionally
shows that the sections differing in terms of optical properties
can be attached to the cover foil, for example in the form of a
bar-code.
[0066] FIG. 5 shows an embodiment of the portion capsule being
substantially identical to the embodiment illustrated in FIG. 3.
Again the recesses represent the key bit. The coffee machine only
will start operating, if the recesses interact with the
corresponding bulges and therefore an electric circuit is changed
respectively. The placement of such a system is not restricted to
the brewing chamber. For instance the system may be placed in the
portion capsule's media chute.
[0067] FIG. 6 shows a version of the invention that includes an
electric material forming a surrounding ring, which preferably has
a raised form. The electrically conductive material is scanned by
electric sliding contacts, which are placed in the media chute and
form electric contacts of an electric circuit, while the portion
capsule is inserted.
[0068] FIG. 7 an embodiment of the portion capsule being
substantially identical to the embodiment illustrated in FIG. 6, in
which it is provided that the ring area has reflective or mat
sections, for example in form of a covering, and allows a read-out
by means for optical detection, which are placed in the media chute
and are part of a control current, while the portion capsule is
inserted.
[0069] FIG. 8 shows a relative broad and raised ring which
represents the identifier. The media chute is equipped with a
corresponding vacancy that tests whether the portion capsule has
the proper identifier. The broad ring is scanned, for example, by
mechanical sensors, which are placed in the media chute and close
the contacts of an electric circuit, while the portions capsule is
inserted.
[0070] FIG. 9 shows another embodiment of the portion capsule
according to the invention. In the present case an electrically
conductive coat is integrated in the edge region's back and is
scanned by electric sliding contacts, which are placed in the media
chute and form electric contacts of an electric circuit, while the
portion capsule is inserted.
[0071] FIG. 10 shows another embodiment of the portion capsule
according to the invention. In the present case the portion capsule
has an electrically conductive coat such as a conductive varnish
layer or an aluminum foil. The coat is scanned by electric sliding
contacts, which form electric contacts of an electric circuit,
while the portion capsule is inserted.
[0072] FIG. 11 illustrates a version of the portion capsule having
also an electrically conductive coat that is placed on its bottom
and is identified by a metal sensor, which is placed in the chute
and, for example, detects inductively, while the portion capsule is
inserted.
[0073] The embodiment of the invention shown in FIG. 12 has a
build-in element made of metal (here a strainer 19) that is
recognized as identifier by a metal detector.
[0074] The version of the invention shown in FIG. 13 includes a
ferromagnetic material placed at the portion capsule' bottom. The
identifier is scanned, for example, by a magnet, which is placed in
the chute, while the portion capsule is inserted. The ferromagnetic
material acts as identifier.
[0075] FIG. 10 shows another embodiment which includes a bar-code
placed in the region of the cover foil.
[0076] According to the embodiment shown in FIG. 15 a metallic ring
is integrated in the wall and closes an electric circuit placed in
region of the brewing chamber.
[0077] FIG. 16 shows another embodiment of the portion capsule 1
according to the invention. The illustrated portion capsule
features a base element that is basically conical-shaped in the
present case and has a bottom region 2.2 and a wall region 2.1. It
is provided that the base element contains the raw material and, if
necessary, build-in elements like a filter as illustrated here. The
expert knows that the build-in element may also include other
build-in elements. A flange/edge region 2.4, which is preferably
circular and, for example, may be used for sealing a cover foil to
it, is attached to the end of the base element, which is placed
opposite to the bottom. The flange/edge region has means for fit
locking, friction locking and/or detection 2.4.2 in the outer area
(outer circumference). As especially shown in the FIGS. 17a-17c the
mean 2.4.2 is, in the present case, a gearwheel that is formed by
several recesses/bulges evenly arranged in the edge region.
Preferably, it is provided that the edge region has a sealing
surface, which sealingly interacts with the sealing 21 attached to
the brewing chamber 27, on the interior side of the gearwheel. The
sealing 21 makes sure that the water coming from a water inlet 28
flows rather through the portion capsule by passing a opening,
which has been made by a mandrel 29, than around it.
[0078] FIG. 17a-17c show different embodiments of the mean 2.4.2.
According to the version shown in FIG. 17a the gearwheel has
forty-five teeth. According to the version shown in FIG. 17b or 17c
the gearwheel has twenty-two or twenty-nine teeth, respectively.
The expert knows that the manufactured teeth can be shaped
arbitrarily. All FIGS. 17a-17c demonstrate how the portion capsule
1 can be hold by a part of the brewing chamber 27 using two holding
arms 30. The holding arms interacts with the mean 2.4.2. If they
are not available, the holding arms will not hold the portion
capsule and the portion capsule will not be inserted into the
brewing chamber and will fall through it into a dropping box
instead.
[0079] FIG. 18 shows the mean 2.4.2. along with an mean for fit
locking 24, which is attached to the coffee machine and is
represented by a pinion here. It is provided that the mean for fit
locking 24 is placed in the media chute having a port for inserting
the portion capsule in the coffee machine. The distance between the
inner wall of the portion capsule 25 and the pinion 27 are designed
in such a way that the portion capsule only will pass the port, if
the mean for fit locking is formed complementary to the teeth of
the pinion 27. Only in this case the portion capsule rotates the
pinion 24 while it falls. Both rotating and falling are represented
by arrows in the figure. The portion capsule needs the rotation for
passing the media chute's port and falling in the intended position
afterwards. If the portion capsule has no or wrong mean of fit
locking, it will be impossible to place the portion capsule by
passing the media chute in the intended position. Additionally or
alternatively it is provided that the pinion 24 has a pick-up that
detects the rotary movement and transmits it to a control unit. If
the rotation at least correspond a defined rotating element, the
control unit will activate, for example, the brewing unit. The
expert knows that the portion capsule's border may include means
for friction locking that interacts with a mean, for example an
edge, and shift it in such a way that the shift is detected and
therefore the brewing chamber is activated.
[0080] The expert moreover knows that a sensor, being for example a
camera, which detects the form of the mean 2.4.2., may be installed
in the media chute. In the present case the form and/or the
distance between the teeth may be detected. If the proper portion
capsule was inserted, a resulting signal could be transmitted to a
control unit, which activates the brewing chamber.
[0081] FIG. 19 schematically shows a view of another portion
capsule's version according to an embodiment of the present
invention. FIG. 20 illustrates the same portion capsule from a
different point of view schematically. FIG. 19 shows the front view
of the portion capsule. FIG. 20 shows the portion capsule viewed
from an angle below. In all figures the portion capsule is labeled
with the reference sign 1. The portion capsule substantially has a
frustoconically shaped base element 2, which is formed similar to a
pot and encloses a cavity 3. The cavity 3 is sealed by a membrane
4. Since the viewing direction of FIG. 1 is essentially parallel to
the plane, in which the membrane is located, the figure just
adumbrate the membrane at the upper edge of the portion capsule. In
particular the base element 2 comprises a soft, semi-rigid or rigid
plastic material which is deep-drown, preferably. The membrane
comprises a foil made of plastic material or aluminum. Preferably
the base element has a circumferential mounting flange 17 in the
region of the membrane, with the membrane and the mounting flange
17 being firmly bonded, in particular by welding or gluing.
Preferably a filter element, which is not specifically depicted in
the figures, is placed within the base element 2. For instance, the
filter element is made of thermoplastic resin such as, for example,
polypropylene. The filter element could also be made of a non-wovon
material such as, for example, thermoplastic resin. Preferably the
filter element divides the cavity 3 in two sections. It is provided
that the first section can be filled with a raw material and the
second section can be filled with and particularly collect a
beverage's extract, which is not shown, during the extractions
process. Both sections are not illustrated individually.
[0082] The portion capsule is intended for inserting into a brewing
chamber or a device for producing a beverage, which is not shown
here. In particular such a device for producing a beverage is a
coffee machine. The device for producing a beverage could be also a
machine that produces a tea drink, a chocolate drink or any other
beverage. Preferably an extraction liquid, which is particularly
water or hot water, is brought under high pressure into the brewing
chamber of the device for producing a beverage. The extraction
liquid interacts with the raw material of the beverage in such a
way that an extract of a beverage or a beverage is generated. In
particular the filter element is utilized as a strainer for the
extract of a beverage.
[0083] According to the invention the base element 2 has a wall
region 12 and a bottom area 11. The wall region 12 basically ranges
from the flange 17 to the bottom region 11. Several grooves 15 are
placed in the wall region. In particular these grooves are keyways
that are integrated in the wall region 12 and are facing the cavity
3 and range from the flange 17 to the bottom region 11 (i.e. they
run perpendicular according to FIG. 19). According to the invention
provision is made for the grooves 15 to be extended vertically
across the wall region, i.e. they run straight from the flange 17
to the bottom region 11, in which it is not necessary that they are
extended over the whole length. The grooves are formed according to
the invention in such a way that the wall region is reinforced or
stiffened due to the grooves 15. Moreover the plurality of the
grooves 15, which are distributed over the wall region 12, realize
an adhesion between wall region 12 and the brewing chamber's wall
of the device for producing a beverage after the extraction
process. This makes it easier to eject the portion capsule from the
brewing chamber automatically. The portion capsule's version
represented in FIG. 19 comprises a circumferential border 16 that
is placed at the wall region 12 ranging from the flange 17 to the
bottom area 11, namely adjacent to the flange 17 facing towards the
bottom area 11. The border 16 has an enlarged diameter (parallel to
the membrane 4) compared to the wall region's ranging from the
border 16 to the bottom area 11. It is provided that the border's
contour 16 is designed in such a manner that the border's diameter
tapers towards the flange 7.
[0084] It is provided according to the portion capsule's
embodiment, which is represented in FIG. 19 and is in accordance
with the invention, that the grooves 15 are placed in the border's
region in the first part, partially range from the border 16 to the
bottom area 11 across the wall region 12, in the second part and
then finally end. All in all the grooves cover, for example, around
50% of the extension of the wall region 12, which ranges from the
flange 7 to the bottom area 11, wherein one-third of the grooves'
extension is placed in the border's region and two-thirds of the
grooves' extension is placed in the remaining wall region 12 that
range from the border 16 to the bottom area 11.
[0085] A portion capsule according to the invention is shown as
sectional view along the portion capsule's extension regarding its
height in FIG. 21, i.e. the section's plane is perpendicular to the
membrane's main plane. FIG. 22 also shows a portion capsule
according to the invention in a sectional view portraying the
sectional plane, which is parallel to the membrane's main plane. It
is noticeable that the interior of the portion capsule's cavity is
shown in FIG. 21. The portion capsule's material or the base
element's material is so thin that the implementation of grooves at
the exterior shown in FIG. 19 leads to corresponding convexities
and impressions at the interior. FIG. 22 particularly illustrates
the gearwheel shaped contour resulting from insertion of grooves in
the portion capsule's wall region.
* * * * *