U.S. patent application number 14/577569 was filed with the patent office on 2015-04-23 for disposable cartridge for brewed beverages.
The applicant listed for this patent is Kevin B. Kihnke. Invention is credited to Kevin B. Kihnke.
Application Number | 20150110928 14/577569 |
Document ID | / |
Family ID | 52826407 |
Filed Date | 2015-04-23 |
United States Patent
Application |
20150110928 |
Kind Code |
A1 |
Kihnke; Kevin B. |
April 23, 2015 |
DISPOSABLE CARTRIDGE FOR BREWED BEVERAGES
Abstract
A beverage cartridge includes a bottom wall and at least one
sidewall forming a chamber in which a beverage can be prepared from
a stored beverage product. The sidewall includes one or more
pre-formed openings or openable portions that form exit paths for a
prepared beverage upon the introduction of a liquid to the chamber.
The pre-formed openings or openable portions are initially covered
or sealed by a cover, and provide existing exit paths for prepared
beverage upon removal or opening of the cover. The cover is
manually removable by a user, or is openable in response to
increased fluid pressure in the chamber. Optionally, a filter
element is provided inside the cartridge for retaining a used
beverage product inside the cartridge as a prepared beverage exits
from the cartridge.
Inventors: |
Kihnke; Kevin B.; (Spring
Lake, MI) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Kihnke; Kevin B. |
Spring Lake |
MI |
US |
|
|
Family ID: |
52826407 |
Appl. No.: |
14/577569 |
Filed: |
December 19, 2014 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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13313257 |
Dec 7, 2011 |
8927037 |
|
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14577569 |
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61440604 |
Feb 8, 2011 |
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Current U.S.
Class: |
426/110 ;
426/115 |
Current CPC
Class: |
B67D 2001/0827 20130101;
B65D 85/8043 20130101; A47J 31/0668 20130101; B67D 3/0067
20130101 |
Class at
Publication: |
426/110 ;
426/115 |
International
Class: |
B65D 85/804 20060101
B65D085/804 |
Claims
1. A beverage cartridge comprising: a cup bottom wall; at least one
cup sidewall extending upwardly from said cup bottom wall and
having an upper end portion opposite said cup bottom wall, said cup
bottom wall and said cup sidewall cooperating to form a chamber; at
least one opening in said cup sidewall, said at least one opening
providing an exit path for a liquid beverage; a filter element
disposed in said chamber, said filter element configured to filter
the liquid beverage dispensed through said at least one opening in
said cup sidewall; and a cover disposed around said at least one
opening and sealed to at least one of said cup sidewall and said
cup bottom wall; wherein said cover is openable or removable to
thereby permit the liquid beverage to be dispensed into a beverage
receptacle.
2. The beverage cartridge of claim 1, further comprising a beverage
product disposed within said filter element in said chamber,
wherein said beverage product is retained in said chamber by said
filter element during a beverage-making process.
3. The beverage cartridge of claim 1, wherein said cover comprises
a metallic foil or polymeric film layer sealed directly to said cup
sidewall.
4. The beverage cartridge of claim 3, wherein said cover comprises
a pull-tab configured to be grasped and pulled to unseal said cover
from said cup sidewall.
5. The beverage cartridge of claim 4, wherein said pull-tab is
disposed at an upper region of said cover.
6. The beverage cartridge of claim 3, wherein said cover comprises
a gripping tab at a bottom region of said cover below said cup
bottom wall, said gripping tab configured to be twisted to unseal
said cover from said cup sidewall.
7. The beverage cartridge of claim 1, wherein said cover comprises
an openable portion configured to open in response to increased
fluid pressure inside said cartridge.
8. The beverage cartridge of claim 7, wherein said openable portion
comprises at least one chosen from a frangible seam, a frangible
seal, and a weakened portion.
9. The beverage cartridge of claim 8, wherein said openable portion
is disposed along said cup sidewall or said cup bottom wall.
10. The beverage cartridge of claim 1, further comprising a top lid
sealed to said upper end portion of said cup sidewall, opposite
said cup bottom wall.
11. The beverage cartridge of claim 10, wherein said cover is
sealed to said cup sidewall below said top lid.
12. The beverage cartridge of claim 1, wherein said opening in said
cup sidewall comprises a plurality of pre-formed openings.
13. A beverage cartridge comprising: a cup sidewall having upper
and lower end portions; a top lid sealed to said upper end portion
of said cup sidewall, said top lid and said cup sidewall
cooperating to form a chamber; a pre-formed opening in said cup
sidewall, said pre-formed opening providing an exit path for a
liquid beverage; and a cover disposed around said pre-formed
opening and sealed to said cup sidewall, said cover comprising an
openable region; wherein said cover is openable at said openable
region to thereby permit the liquid beverage to be dispensed into a
beverage receptacle.
14. The beverage cartridge of claim 13, wherein said cover is
sealed around a periphery of said cup sidewall at said upper end
portion, and extends around said lower end portion of said cup
sidewall.
15. The beverage cartridge of claim 14, further comprising a cup
bottom wall at said lower end portion of said cup sidewall, said
cup bottom wall cooperating with said top lid and said cup sidewall
to form said chamber.
16. The beverage cartridge of claim 13, further comprising a filter
element disposed in said chamber, said filter element configured to
filter the liquid beverage dispensed through said pre-formed
opening in said cup sidewall
17. The beverage cartridge of claim 13, wherein said openable
portion comprises at least one chosen from a frangible seam, a
frangible seal, and a weakened portion.
18. The beverage cartridge of claim 17, wherein said openable
portion is configured to open in response to increased fluid
pressure inside said cartridge.
19. The beverage cartridge of claim 18, wherein said openable
portion comprises at least one chosen from a frangible seam, a
frangible seal, and a weakened portion.
20. The beverage cartridge of claim 13, wherein said cover
comprises at least one chosen from (i) a pull-tab configured to be
grasped and pulled to unseal said cover from said cup sidewall, and
(ii) a gripping tab at a bottom region of said cover below said
lower region of said cup sidewall, said gripping tab configured to
be twisted to unseal said cover from said cup sidewall.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation-in-part of U.S.
patent application Ser. No. 13/313,257, filed Dec. 7, 2011, which
claims the priority benefit of U.S. provisional application Ser.
No. 61/440,604, filed Feb. 8, 2011, which are hereby incorporated
herein by reference in their entireties.
FIELD OF THE INVENTION
[0002] The present invention relates generally to cup-like
containers for storing dry or concentrated beverage product, and
dispensing a prepared beverage by injecting water or other fluid
into the cartridge.
BACKGROUND OF THE INVENTION
[0003] Single-use beverage cups or cartridges typically contain a
dry beverage product such as coffee grounds, tea leaves, or a dry
beverage concentrate (e.g. freeze-dried coffee crystals) or the
like, such as for use in single-serving beverage brewing machines.
Depending on the type of beverage product the cartridge contains,
the cartridge may include a filter to prevent particles of beverage
product from exiting the cartridge during a beverage-making
operation. Such beverage cartridges are typically pierced in one or
more locations to inject water and to drain a resulting prepared
beverage out of the cartridge and into a receptacle.
SUMMARY OF THE INVENTION
[0004] The present invention provides a beverage cartridge having a
bottom wall and a generally cylindrical sidewall, the sidewall
having at least one openable portion that opens to form an exit
path for a prepared beverage. The cartridge sidewall may be opened
by applying a compressive load to the sidewall, such as by moving a
portion of the cup bottom wall toward an upper end portion of the
sidewall. The openable portions of the sidewall may be, for
example, apertures, slits, or slots that extend entirely through
the sidewall, or they may be weakened portions of the sidewall that
maintain the cartridge in a substantially sealed condition until
compressive loads are applied to split open the weakened portions.
The beverage cartridge may allow for increased capacity of beverage
product because substantially all of the interior space of the
cartridge is available for the beverage, regardless of whether an
optional filter element is included. Further, a used cartridge may
be significantly deformed and thus very noticeably different in
appearance after use, as compared to an unused cartridge, making it
easy for a user to determine at a glance (or even by touch) whether
the cartridge is used or unused.
[0005] According to one form of the present invention, a beverage
cartridge includes a cup bottom wall, at least one cup sidewall
having an opening, and a filter element. The cup sidewall extends
upwardly from the cup bottom wall and has an upper end portion
opposite the cup bottom wall. The cup bottom wall and the cup
sidewall cooperate to form a chamber. The opening or openings in
the cup sidewall provide one or more exit paths for a liquid
beverage. The filter element is disposed in the chamber and filters
liquid beverage that is dispensed through the one or more openings
in the cup sidewall. Optionally, a removable cover is provided
along the cup sidewall to cover and/or seal the openings in the cup
sidewall.
[0006] According to another form of the present invention, a
beverage cartridge includes a cup bottom wall and at least one cup
sidewall cooperating to form a chamber. The sidewall extends
upwardly from the bottom wall and has an upper end portion opposite
the bottom wall, the sidewall including at least one openable
portion. The cup sidewall is configured to open at the openable
portion to form an exit path for the contents of the chamber
through the cup sidewall. The openable portion may be opened to
form the exit path by applying a compressive load to the sidewall,
such as by moving a portion of the cup bottom wall toward the upper
end portion of the sidewall, which may crush or buckle the
sidewall. Optionally, the cup bottom wall is made from a puncture
and fracture-resistant material. Optionally, the openable portion
of the cup sidewall is openable in response to increased fluid
pressure in said chamber. This fluid pressure may also help force
liquid beverage out through the openable portion of the cup
sidewall.
[0007] In one aspect, the cartridge includes a filter element
positioned inside the chamber defined by the cup bottom wall and
the cup sidewall. The filter element includes a filter bottom wall
and a filter sidewall to form a filter chamber for containing a
beverage product. Optionally, the filter walls closely conform to
inner surfaces of the cup bottom wall and the cup sidewall. An
upper end portion of the filter sidewall may be sealed to the upper
end portion of the cup sidewall to prevent beverage product
particles from escaping the filter chamber.
[0008] In another aspect, the beverage cartridge includes a top lid
that is sealed to the upper end portion of the cup sidewall, to
seal the chamber from the outside environment. Optionally, the top
lid is a pierceable membrane, such as a multi-layer or laminate
membrane including at least one metal foil layer and at least one
plastic film layer, such as a polyethylene layer.
[0009] In still another aspect, the openable portion of the cup
sidewall is an aperture that extends completely through the
sidewall. For example, the aperture could be a slit or a slot, or a
hole extending through the cup sidewall to expose the chamber.
Optionally, the cartridge includes a removable cover around or
along an outer surface of the sidewall for covering the aperture(s)
that form the openable portion or portions of the cup sidewall.
[0010] In yet another aspect, the openable portion of the cup
sidewall is a weakened portion of the cup sidewall so that the
cartridge chamber can remain sealed from the outside environment
until the weakened portion is opened. Optionally, the weakened
portion is a score line in the cup sidewall, which does not extend
entirely through the sidewall. Optionally, the weakened portion is
a reduced-thickness region of the cup sidewall.
[0011] In yet another aspect, the beverage cartridge includes a
beverage product in the chamber. For example, the beverage product
may be a brewed or non-dissolving beverage product contained in a
filter chamber.
[0012] According to another form of the present invention, a method
is provided for preparing a beverage from a beverage product
contained in a cartridge. The method includes providing a beverage
cartridge including an outer cup that defines a chamber for
containing the beverage product. The outer cup has a cup bottom
wall, at least one cup sidewall extending upwardly from the bottom
wall, at least one openable portion in the cup sidewall, and a
pierceable top lid that is sealed to an upper end portion of the
cup sidewall, opposite the bottom wall. The method further includes
applying a compressive force to urge the cup bottom wall toward the
upper end portion of the cup sidewall, or vice versa, thereby
forming an opening in the cup sidewall at the openable portion. A
fluid is injected through the top lid and into the chamber, where
the fluid mixes with the beverage product to form the beverage. The
beverage is dispensed from the chamber through the opening in the
cup sidewall. Optionally, the opening in the cup sidewall is
created via application of fluid pressure to the cup chamber, which
fluid pressure may also aid the beverage product in being
discharged through the opening in the cup sidewall.
[0013] In one aspect, the method further includes providing a
filter element disposed in the chamber of the outer cup, the filter
element for containing the beverage product. The beverage is
filtered through the filter element just before the beverage is
dispensed through the opening in the cup sidewall, and the beverage
product itself is retained in the filter element.
[0014] In another aspect, the step of applying the compressive
force includes supporting the upper end portion of the cup sidewall
and pressing upwardly on the cup bottom wall to cause at least a
portion of the cup sidewall to buckle in the vicinity of the
openable portion.
[0015] In a further aspect, the step of forming an opening in the
cup sidewall at the openable portion includes splitting open a
weakened portion of the cup sidewall.
[0016] Thus, the present invention provides a beverage cartridge
that contains a beverage product in a substantially sealed chamber
prior to the addition of fluid and the extraction or dispensing of
a prepared beverage from the cartridge. The sidewall of the
cartridge includes one or more openable portions that open in
response to the application of compressive loads to the sidewall,
which may cause at least limited crushing, buckling, or similar
deformations to the sidewall. The cartridge can be adapted for use
with brewed beverage product that is contained in a filter inside
the cartridge, or the cartridge may contain dry or concentrated and
dissolvable beverage product that simply mixes with or dissolves in
water or similar fluid to create a finished beverage without need
for filtration. Although the cartridge may typically be used in
single-serving beverage applications, it will be appreciated that
the cartridge may be scaled in size to provide substantially any
desired number of servings. Its space-efficient design also allows
for increased capacity, particularly for brewed beverages utilizing
a filter, to allow an increased quantity of beverage to be prepared
from a relatively small package. Further, because the cartridge
typically undergoes extensive permanent deformation and opening of
fluid exit paths in the sidewall during the beverage-making
process, a user can readily observe whether a given cartridge is
used or unused.
[0017] These and other objects, advantages, purposes, and features
of the present invention will become apparent upon review of the
following specification in conjunction with the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 is a side elevation of a beverage cartridge in
accordance with the present invention, including a diagrammatic
depiction of an initial step in preparing a beverage with the
cartridge;
[0019] FIG. 2 is a side elevation of the beverage cartridge of FIG.
1, in which the cartridge has been partially crushed to create
openings in the cartridge sidewall;
[0020] FIG. 3 is a side perspective view of the cup portion and
filter element of the beverage cartridge of FIG. 1;
[0021] FIG. 4 is a side perspective view of a filter element;
[0022] FIG. 5 is a side elevation of another beverage cartridge,
including a removable cover along the sidewall for covering
pre-formed apertures in the sidewall;
[0023] FIG. 6 is a side perspective view of a cartridge similar to
that of FIG. 5, but after crushing, and having a plurality of
opened slits in its crushed sidewall;
[0024] FIG. 7 is a side elevation of another beverage cartridge,
including a removable cover along the sidewall for covering
pre-formed slot openings in the sidewall;
[0025] FIG. 8 is a side elevation of a cartridge similar to that of
FIG. 7, but with a removable cover having a pull tab;
[0026] FIG. 9 is a side elevation of another cartridge similar to
that of FIG. 7, but with a removable cover having a bottom
twist-tab; and
[0027] FIG. 10 is a side elevation of another beverage cartridge,
including a pressure-openable cover.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0028] The present invention is directed to a beverage cartridge
for storing and dispensing a beverage product and a method of
making a prepared beverage inside the cartridge, the prepared
beverage being dispensed from the cartridge and into a beverage
receptacle. Referring to FIG. 1, a beverage cartridge 10 includes a
bottom wall 12, a generally cylindrical or frusto-conical
upstanding sidewall 14 extending upwardly from bottom wall 12, and
a top lid or cover 16. It will be appreciated that the terms
"upper" and "lower" are used throughout this specification with
reference to the appended drawings, and are not intended to be
limiting in any way. Bottom wall 12 and sidewall 14 cooperate to
form a cup-shaped container 15 that, when sealed with top lid 16,
defines a sealed chamber 18 for storing a beverage product 20.
Sidewall 14 defines a plurality of openable portions 22 that, in
the illustrated embodiment of FIGS. 1 and 2, are scored or
reduced-thickness lines or regions in the sidewall, but which
instead could be through-holes or slits or openings that extend
completely through the sidewall.
[0029] Sidewall 14 may be a relatively thin flexible wall having a
lower end portion 14a joined to a perimeter of bottom wall 12, and
having an upper wall portion 14b to which top lid 16 is attached.
Openable portions 22 remain closed prior to use of the cartridge in
order to maintain beverage product 20 substantially sealed inside
of chamber 18 and isolated from the surrounding atmosphere. When
openable portions 22 are formed or configured as weakened score
lines, these score lines may be created using different methods
such as die-cutting, laser-etching, or the like. Optionally, the
openable portions 22 may be formed as reduced-thickness lines or
regions that are formed during the same process by which sidewall
14 is formed, such as a molding process. In the illustrated
embodiment, openable portions 22 extend substantially all the way
down to where lower end portion 14a meets bottom wall 12, to
maximize the drainage of prepared beverage from chamber 18.
Substantially any number of openable portions may be used, although
seven or eight openable portions or lines may be typical for
single-serving beverage cartridges.
[0030] Thus, with openable portions 22 formed as weakened regions
of sidewall 14, the openable portions 22 remain substantially
sealed during normal handling of the cartridge 10, but are readily
opened during a beverage-making process that involves compressing
and/or buckling sidewall 14 to induce localized stresses in the
sidewall, thus causing at least some of the openable portions 22 to
open (FIG. 2), as will be described in more detail below.
Optionally, the openable portions 22 may open in response to an
increase in fluid pressure in chamber 18. Regardless of the manner
in which openable portions 22 are opened, it will be appreciated
that any fluid pressure inside of chamber 18, which exceeds
atmospheric pressure, will tend to urge the beverage product out
through the openings formed by openable portions 22. Thus,
discharge of the beverage product may be accomplished through
gravity flow and/or flow aided by fluid pressure in the
chamber.
[0031] Optionally, openable portions 22 are made up of apertures
23, such as slits, slots, cuts, or the like, which extend all the
way through sidewall 14 (FIG. 6). A removable outer cover 25 (FIG.
5) may be provided around at least the portions of sidewall 14
having apertures 23. The outer cover 25 may be self-adhering and
self-sealing along an outer surface of sidewall 14 to limit or
prevent the exposure of beverage product 20 in chamber 18 to the
outside atmosphere through apertures 23. For example, outer cover
25 may be a foil and/or polymeric film layer attached or sealed
directly to sidewall 14 via a light adhesive or sealant layer.
Removable cover 25 substantially prevents oxygen and other gases
and/or contaminants from entering or escaping from chamber 18
through apertures 23, and may prevent the escape of beverage
product 20 from apertures 25, prior to the initiation of a
beverage-preparation process. Prior to beverage preparation, a user
can peel away the removable cover 25 to expose the apertures 23,
such as shown in FIG. 6.
[0032] Bottom wall 12 of cup portion 15 may be strengthened or
reinforced, particularly as compared to sidewall 14, to resist
fracturing or puncturing during the application of mechanical loads
by a compression member such as a pin or finger 27 (FIG. 2), or
even a movable disc, that can be moved upwardly. For example,
bottom wall 12 and sidewall 14 may be unitarily formed in a molding
process, with bottom wall 12 made substantially thicker than
sidewall 14 to provide added strength. Optionally, bottom wall 12
may incorporate reinforcing fibers, an extra layer or coating of
reinforcing material, or the like, to provide sufficient strength
to bottom wall 12.
[0033] Optionally, and as shown in FIGS. 1-4, beverage cartridge 10
can be fitted with a filter member or element 24 that lines the
interior surfaces of sidewall 14 and bottom wall 12. Upper end
portion 14b of sidewall 14 forms an increased-diameter ledge or
shoulder region 26 that receives an upper rolled or flared lip
region 28 of filter member 24. As best seen in FIGS. 3 and 4,
filter member 24 includes a filter bottom wall 30 and a filter
sidewall 32, which generally correspond to the cup portion's bottom
wall 12 and sidewall 14, respectively. Flared lip 28 is formed at
the upper end of filter sidewall 32, and may be sealed to shoulder
region 26 of sidewall 14 using a food-safe adhesive or sealant, to
limit or prevent beverage product 20 from escaping filter member
24. As best seen in FIGS. 1 and 2, filter bottom wall 30
substantially lines bottom wall 12, and filter sidewall 32
substantially lines sidewall 14 such that filter sidewall 32
extends substantially the full length of the interior of the cup
sidewall 14 all the way to bottom wall 12, so that there is little
or no space between filter member 24 and the inner side or bottom
surfaces of cup portion 15. This maximizes the available space in
beverage cartridge 10 for beverage product 20. Thus, filter member
24 defines a filter chamber 34 inside of chamber 18, which has
nearly the same volume or capacity as chamber 18.
[0034] It will be appreciated that when beverage product 20 is a
non-dissolving beverage product such as ground coffee, tea leaves,
or the like, filter member 24 provides filtration for liquids
injected into cartridge 10, so that the beverage product solids are
retained inside of filter chamber 34 during the beverage
preparation or brewing process. Filter member 24 may be made from
substantially any filter material, such as paper-based filter
material that is commonly used for conventional disposable coffee
filters and the like. Optionally, a metallic or polymeric screen or
mesh material may be used to form the filter member, without
departing from the spirit and scope of the present invention.
Filter member 24 includes a plurality of fold lines or pleats or
flutes 40 in its sidewall 32, which increase the filtration surface
area of filter member 24 (FIGS. 3 and 4). Optionally, and instead
of the generally slanted or spiral-shaped flutes 40 of FIG. 4, the
filter member may be formed with generally vertically-aligned
flutes or pleats, or with no pleats at all (such as to maximize the
space available for beverage product within the filter).
[0035] Top lid 16 is sealed at its outer perimeter region to the
generally circular upper end portion 14b of sidewall 14. In the
illustrated embodiment, top lid 16 is a pierceable sheet member
that is applied after chamber 18 is filled with beverage product 20
and/or filter member 24. For example, top lid 16 may be a thin
laminate membrane made up of at least one metal foil layer (such as
aluminum) and optionally a polymeric film, such as a polyethylene
layer, to enhance the strength of the top lid and/or to enhance its
hermetic sealing properties. Top lid 16 may be readily pierced by a
fluid injection needle 42 or other fluid conduit, such as shown in
FIGS. 1 and 2. Preferably, needle 42 is hollow and has an opening
44 through which fluid conducted along the interior conduit of the
needle may exit.
[0036] To prepare and extract a beverage from beverage cartridge
10, at least one of the lower and upper end portions 14a, 14b of
sidewall 14 is pushed toward the other to impart localized stresses
in the sidewall 14 near at least some of openable portions 22.
These stresses cause openable portions 22 to split or otherwise
spread open, thus forming one or more openings 46 (FIG. 2) that
create exit paths for the liquid contents of chamber 18. Beverage
cartridge 10 may be installed in a machine that includes an annular
top support 48 that engages at least an outer perimeter region of
top lid 16 along upper end portion 14b of sidewall 14 (FIG. 2). The
machine may further include injection needle 42 and compression
finger, projection, or disc 27, which move in opposite directions
relative to one another, and to beverage cartridge 10 and top
support 48, during the beverage preparation process (FIGS. 1 and
2).
[0037] Once beverage cartridge 10 is installed in the machine and
top support 48 is positioned as shown in FIG. 2, injection needle
42 may be moved downwardly and through top lid 16 so that at least
a tip portion 42a of the injection needle 42 is positioned inside
of chamber 18. Compression member or finger 27 is moved upwardly to
engage and urge bottom wall 12 upwardly (FIG. 2), which imparts
stresses in sidewall 14 to create openings 46 at openable portions
22. This may cause sidewall 14 to buckle or otherwise deform, such
as shown at reference numeral 50 in FIG. 2. It will be appreciated
that compression member or finger 27 may be moved to push bottom
wall 12 upwardly relative to upper end portion 14b of sidewall 14
either before or after the downward piercing motion of injection
needle 42. Optionally, the motion of both injection needle 42 and
compression member or finger 27 may be accomplished simultaneously.
Once injection needle 42 pierces top lid 16 with its tip portion
42a disposed in chamber 18, a fluid 52 such as hot or cold water or
a water-based mixture, is dispensed into chamber 18 via opening 44
in hollow needle 42 to mix with beverage product 20.
[0038] Alternatively, openable portions 22 may be opened by a
buildup of fluid pressure inside of chamber 18 due to injection of
fluid 52 through needle 42a, such that sidewalls 14 need not be
buckled or compressed under a compressive load to create the
openings. In this case, top lid 16 will be configured to
substantially seal around injection needle 42 as the tip portion
42a passes through the lid, and top lid 16 will be sufficiently
secured to top portion 14b of sidewall 14, so that sufficient fluid
pressure may be built up in chamber 18 to cause openable portions
22 to split open under tensile stresses in the sidewall 14, and
substantially without fluid leakage through top lid 16. Such
buildup of fluid pressure would also facilitate the discharge of
beverage through the openable portions, such as to provide more
complete discharge of product (and/or to extract more flavor from
coffee grounds, tea leaves, or other brewed beverage product), than
would otherwise occur if the beverage were discharged out of
chamber 18 via gravity only.
[0039] In the illustrated embodiment of FIGS. 1 and 2, beverage
product 20 is a non-dissolving product, such as coffee grounds or
tea leaves, which are contained within filter member 24, of which
filter sidewall 32 is visible through openings 46 in sidewall 14 in
FIG. 2. As fluid 52 passes through beverage product 20, it forms a
finished or prepared beverage 54, which seeps out through filter
sidewall 32 and openings 46. Prepared beverage 54 is subsequently
collected and directed into a beverage container, such as a mug or
carafe. After the beverage preparation process is complete, top
support 48 may be raised so that beverage cartridge 10 may be
removed from the machine and discarded. It will be appreciated that
a dissolvable beverage product, such as dry coffee or tea crystals,
flavored beverage powders, or the like, may also be prepared using
the beverage cartridge 10 either with or without a filter member,
since the dissolvable beverage product would be expected to
completely dissolve in the presence of fluid 52 and pass through a
filter, if present.
[0040] It will be appreciated that the beverage cartridge and/or
beverage making process may be varied from the above descriptions,
without departing from the spirit and scope of the present
invention. For example, the beverage cartridge may include a
non-reinforced bottom wall that is urged upwardly by a larger
compression element such as a plate or disc sized similarly to that
of the bottom wall. Optionally, a larger displacement member may be
used to displace all or a portion of the bottom wall of the
beverage cartridge during the beverage making process, and it may
even be desirable to provide a mechanism that displaces the entire
bottom wall of the cartridge toward the upper end portion of the
sidewall, so that substantially the entire sidewall is crushed or
buckled, thus maximizing the area of the openings around the
sidewall, and dispensing beverage substantially evenly through all
of the openings, with minimal liquid retained in the cartridge
after the beverage is dispensed. Optionally, it will be appreciated
that a displacement member could displace the top of the cartridge
toward the bottom wall, without departing from the spirit and scope
of the present invention.
[0041] Optionally, and with reference to FIG. 7, another beverage
cartridge 110 is structurally similar to cartridge 10, but includes
a plurality of slot-openings 123 around a sidewall 114.
Slot-openings 123 define open areas or exit paths 146 in sidewall
114, which are covered by a removable outer cover 125 prior to use
of cartridge 110 for making a beverage. Thus, cartridge 110 may be
used for preparing a beverage in a similar manner as the method of
preparing a beverage using cartridge 10, described above, but
optionally without a crushing or compressing step because once
outer cover 125 is removed, exit paths 146 are open and exposed for
discharging fluids. Removable outer cover 125 may be peeled away
from cup sidewall 114 prior to use of cartridge 110, such as by
gripping an optional pull-tab 125a (FIG. 8) and pulling to unseal
cover 125 from sidewall 114 and openings 123.
[0042] Optionally, and with reference to FIG. 9, another beverage
cartridge 210 may include a removable outer cover 225 that is
sealed around a sidewall 214, above a plurality of slot-openings
223. Outer cover 225 includes one or more twist-off gripping tabs
227 along a bottom wall 212 of cartridge so that a user may grip
cartridge near an upper end portion 214b of sidewall 214, and grip
cover 225 at gripping tab 227, and remove outer cover 225 by
twisting gripping tab 227 relative to sidewall 214. The twisting
motion may break open cover 225 at a seam or seal 229 near upper
end portion 214b of sidewall 214, and/or similar seams or seals in
the cover 225 along the sidewall 214 or bottom wall 212 of
cartridge 210. Removal of cover 225 exposes exit paths 246 through
which prepared beverage or fluid may be dispensed, without need for
crushing or compressing sidewall 214.
[0043] Another beverage cartridge 310 is configured similarly to
cartridge 210 in that it utilizes pre-formed openings in a sidewall
314 and a sealed outer cover 325, but in the case of cartridge 310,
removable outer cover 325 is configured to open in response to
fluid pressure inside of cartridge (FIG. 10), rather than (or in
addition to) being manually openable in a separate step by a user.
In the illustrated embodiment, outer cover 325 includes one or more
frangible seams or seals or weakened portions 325a, 325b along
sidewall 314 and/or a bottom wall 312 of cartridge that includes
pre-formed openings 323 with filter screens, such as shown in FIG.
10. Optionally, the frangible seams or seals or weakened portions
325a, 325b are sealed with a dissolvable sealant that weakens in
the presence of liquid introduced into cartridge 310.
[0044] Fluid pressure is imparted to an interior of cartridge 310
by fluid injection needle 42, which forces fluids (typically a
brewing liquid introduced through needle 42, plus air or other gas
that is initially sealed within cartridge 310) out through
pre-formed openings 346 and between interior surfaces of outer
cover 325 and exterior surfaces of sidewall 314 and bottom wall
312. This imparts stresses to outer cover 325 and may also cause
initial swelling of the cover, causing the one or more seams or
seals or weakened portions 325a, 325b to at least partially open
and thereby permit the prepared beverage or fluid to escape out of
outer cover 325. Accordingly, the introduction of fluid pressure
inside of cartridge 310 causes outer cover 325 to burst open and
permit prepared beverage or fluid that exits pre-formed openings
346 to pass out of the cartridge and into a beverage receptacle,
without need for crushing or compressing sidewall 314, and without
need for manually removing cover 325.
[0045] Optionally, one or more beverage cartridges, each having one
or more pre-formed holes or openings established in their
respective sidewalls, may be overwrapped or collectively
overwrapped in a substantially sealed and air-tight wrapper, such
as a plastic film or foil or composite wrapper, a vacuum-sealed
wrapper, a re-sealable wrapper, or the like. Individually or
collectively-wrapped cartridges may include either of the beverage
cartridges 110, 210, 310 described above, or may be cartridges that
are substantially similar to cartridges 110, 210, 310 but without
the individual removable outer covers 125, 225, 325. In this way,
one or two or more cartridges may be stored in a single air-tight
wrapper, which is removed from the cartridge(s) prior to using the
first cartridge, so that the pre-formed holes or openings of the
cartridges are exposed to the surrounding air after the wrapping is
opened.
[0046] Optionally, the overwrapping may be a re-usable and
re-sealable wrapper that can be used to store any unused
cartridges. Although this may expose the beverage products
contained in the unused cartridge to air and humidity for some time
before a cartridge's use, particularly if the unused cartridge is
stored in an unsealed condition, the time or amount of exposure
(which may be expected to range from a few minutes to several days)
may be relatively limited so that substantially little or no
degradation of the beverage product occurs prior to brewing, even
though the openings in the cartridge sidewalls have been exposed
prior to the brewing process. In this way, cartridges having
pre-formed openings for discharging beverage product may optionally
be produced with a less costly overwrapping, rather than with
individually removable outer covers such as those described above,
and without significantly affecting the quality of the brewed
beverage.
[0047] Thus, the beverage cartridge of the present invention
provides a relatively inexpensive, space-efficient, and
easy-to-handle device and method for making a prepared beverage,
and which may provide an obvious indication (e.g. crushed
sidewalls) when the cartridge is used and should be discarded. The
cartridge may be fitted with a filter element for retaining ground
coffee, tea, or other beverage products within the cartridge
chamber during a brewing process.
[0048] Changes and modifications in the specifically described
embodiments may be carried out without departing from the
principles of the present invention, which is intended to be
limited only by the scope of the appended claims, as interpreted
according to the principles of patent law, including the doctrine
of equivalents.
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