Capsules for beverage machine cartridges and beverage machine cartridges

Abstract

A beverage cartridge (10) is provided for use in forming a beverage in a beverage machine that dispenses pressurized liquid. The cartridge includes a container (12) having an interior space, a lid (38) that accommodates the inflow of pressurized liquid, and a filter (30) configured to contain a beverage medium that is configured to interact with the liquid to form a beverage. The cartridge includes an annular, disc-shaped capsule (60) configured for placement within the container. The capsule has a hollow interior chamber that contains the beverage medium and an open bottom sealed by a membrane (40). The membrane is configured to selectively provide fluid communication between the interior space of the container and the chamber, allowing liquid introduced into the container to flow into the capsule's chamber. The membrane is also pierceable by the beverage machine to accommodate the outflow of liquid flowing into the capsule.

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE The present invention relates to a beverage cartridge for use with a beverage forming system, such as a single-serve coffee brewer. [Background technology]

[0002] Cartridges for use with beverage forming machines are well known and may include one or more filters and a beverage medium, such as ground coffee beans, tea leaves, etc. In some cartridges, the filter is disposed between two or more portions of the interior space of the cartridge, e.g., one portion in which the beverage medium is disposed and a second portion through which liquid that has passed through the permeable filter can flow. One example of such a cartridge is disclosed in U.S. Pat. No. 5,840,189 and / or U.S. Pat. No. 6,607,762, which may be used with beverage making machines such as those described in U.S. Pat. Nos. 5,840,189, 6,607,762, and 7,398,726, each of which is incorporated herein by reference in its entirety. In use, the beverage forming machine introduces pressurized fluid into the cartridge to interact with the beverage medium. In some machines, a perforated outlet needle of the machine is used to perforate a surface of the cartridge (e.g., the bottom wall of the cartridge container or the lid of the cartridge), allowing the pressurized liquid that has interacted with the beverage medium to flow through the filter and exit the cartridge.

[0003] Known cartridges are limited in that they are configured to accommodate one or more dry beverage media. These cartridges typically incorporate a permeable filter and are configured to accommodate the ingredients in a single chamber. Such existing cartridges are not well suited to accommodate different ingredients that are preferably stored in separate sealed compartments prior to use and then mixed during the beverage formation process. For example, known cartridges are not capable of producing a medicated beverage in which the medicated ingredients must be stored in a sealed compartment and then mixed with the extracted beverage during the beverage formation process. As a further example, known cartridges are not capable of producing "Irish coffee" in which the ingredients are coffee and Irish whiskey and are formed by running water through dry coffee grounds and adding Irish whiskey. Known cartridges are configured to use a permeable filter between two or more portions of the interior space of the cartridge, for example, one portion in which the dry beverage medium is located and a second portion through which the pressurized liquid that has passed through the permeable filter can flow, thereby allowing the inclusion of additional liquids or dry beverage media, such as medicated ingredients or alcohol, in the second portion of the cartridge, which may permeate the filter. In some cases, mixing the ingredients may cause the ingredients to be damaged. In other situations, such as when a beverage contains a medicinal ingredient, it may be preferable to seal and isolate certain ingredients from others during production and storage of the finished product prior to use. To the extent that it may be possible to redesign the containers used in existing cartridges to include integrally formed dividers that define separate chambers for housing the different ingredients, redesigning and retooling existing manufacturing processes can be costly and inconvenient.

[0004] One development in cartridge design is known from US Pat. No. 9,227,778, in which a dry medium and a wet medium or two dry media are kept separate within the cartridge, but when used in a beverage machine, both interact with the injected liquid.

[0005] It would therefore be desirable to provide an improved system and method for providing a beverage cartridge capable of containing a plurality of different beverage media without substantially mixing the plurality of beverage media prior to forming a beverage, and without requiring a significant redesign of existing beverage cartridge systems. However, this cartridge has a proprietary design, and while providing an improvement in the art, there remains a need in the art to provide such a cartridge without requiring a significant redesign of existing beverage cartridge systems. Summary of the Invention

[0006] According to a first aspect, an ingredient capsule is provided. The ingredient capsule is for use with a cartridge used in forming a beverage in a beverage machine providing pressurized liquid. The cartridge may have a container defining an interior space and a lid closing an open top end of the container and pierceable by the beverage machine to accommodate the inflow of liquid into the interior space to form the beverage. The cartridge may also include a filter disposed within the interior space and containing a first beverage medium configured to interact with a liquid introduced into the container to form the beverage. In particular, the capsule comprises a body. The body has an annular disc shape and a hollow interior chamber and has an open lower end. The body is sized and shaped to be disposed within the interior space of the container and to position the lower end of the cartridge proximate the lower end of the container. The capsule further comprises a membrane attached to the body and closing the open lower end of the body. The membrane is configured to selectively provide fluid communication between the interior space of the container and the chamber such that pressurized liquid introduced into the interior space of the container can flow into the interior chamber. Furthermore, the membrane is pierceable by the beverage machine to accommodate the outflow of liquid flowing into the interior chamber. Additionally, the capsule further comprises a beverage medium provided within the internal chamber and sealed therein by the membrane, the beverage medium being configured to interact with a liquid introduced into the container and flowing into the internal chamber to form a beverage.

[0007] These and other aspects of the invention will become apparent from the following description and claims. [Brief description of the drawings]

[0008] Aspects of the present invention are described below with reference to the following drawings, in which like numerals refer to like elements and in which:

[0009] [Figure 1] 1 is a side cross-sectional view of a cartridge according to an aspect of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the cartridge of FIG. 1. [Figure 3A] FIG. 2 is an exploded perspective view of the cartridge of FIG. 1 including only the container and capsule according to one embodiment of the present invention. [Figure 3B] 2 is an exploded perspective cross-sectional view of the cartridge of FIG. 1 including only the container and an exemplary capsule according to an embodiment of the present invention. [Figure 4A] FIG. 2 is an isolated perspective view of an exemplary capsule and membrane according to an embodiment of the present invention. [Figure 4B] FIG. 4B is an exploded perspective view of the capsule of FIG. 4A without the membrane. [Figure 4C] 1 is a perspective view of an exemplary capsule and a membrane wrapped around an outer wall, according to an embodiment of the present invention. FIG. [Figure 5A] 1 is a cross-sectional side view of an exemplary cartridge according to an aspect of the present invention excluding the beverage medium. [Figure 5B] 1A-1C are cross-sectional side views illustrating an exemplary cartridge according to an aspect of the present invention, illustrating the flow of fluids into and through the cartridge during a beverage formation process. [Figure 5C] 1 is a close-up view of an exemplary capsule according to an aspect of the present invention, illustrating fluid flow into and through the capsule during a beverage formation process. [Figure 6A] 1 is a top cross-sectional view of another exemplary embodiment of a capsule according to an aspect of the present invention. [Figure 6B] FIG. 6B is a perspective view of the capsule of FIG. 6A. [Figure 7A]13 is a cross-sectional side view of yet another exemplary embodiment of a cartridge according to an aspect of the present invention. [Figure 7B] FIG. 7B is an exploded cross-sectional side view of the embodiment of FIG. 7A. [Figure 7C] FIG. 7B is a top view of the embodiment of FIG. 7A. [Figure 8A] 13 is a cross-sectional side view of yet another exemplary embodiment of a cartridge according to an aspect of the present invention. [Figure 8B] FIG. 8B is an exploded cross-sectional side view of the embodiment of FIG. 8A. [Figure 9] 5 illustrates steps in a method for manufacturing a cartridge according to an aspect of the present invention. [Figure 10] 1 is a perspective view of a beverage machine that can be used in accordance with an aspect of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] It should be understood that aspects of the present invention are described herein with reference to figures illustrating exemplary embodiments. The exemplary embodiments described herein are not necessarily intended to represent all embodiments according to the present invention, but rather are used to illustrate a few exemplary embodiments. Thus, aspects of the present invention are not intended to be narrowly interpreted in view of the exemplary embodiments. Furthermore, it should be understood that aspects of the present invention can be used alone or in any suitable combination with other aspects of the present invention.

[0011] 1 and 2 show a side cross-sectional view and an exploded perspective view, respectively, of an exemplary cartridge 10 incorporating one or more embodiments of the present invention. The cartridge 10 may be used in a beverage machine to form any suitable beverage, such as tea, coffee, or other pour-over type beverage, formed from one or more beverage ingredients and a liquid, such as pressurized, chilled, carbonated, and / or heated water.

[0012] For simplicity, the exemplary improved beverage cartridge 10 configuration further described herein in connection with Figures 1-9 will be described as based on a basic beverage cartridge configuration. However, it will be understood that the disclosed embodiments may be incorporated into any number of different types of beverage cartridges, sachets, pods, or containers, now known and realized in the future, without departing from the scope of the disclosed invention. Accordingly, certain features related to the capsules of the improved beverage cartridge system will be described in further detail herein, while standard features of known beverage cartridges will only be described to the extent deemed necessary to explain and highlight novel features.

[0013] The cartridge 10 can be configured to contain any suitable first beverage medium 20, such as ground coffee, tea leaves, dried herbal tea, powdered beverage concentrate, and / or other beverage making ingredients (such as powdered milk or other creamer, sweeteners, thickeners, flavorings, etc.). In accordance with prominent aspects of the present invention, the cartridge can also include a capsule subassembly (hereinafter capsule) also configured to contain a beverage medium. In some configurations, the beverage medium can include one or more dry or liquid media. As shown in FIG. 1, the capsule contains a dry or liquid beverage medium 25, such as a medicinal, alcoholic material, dairy product, liquid flavoring, etc. In one exemplary embodiment, the cartridge 10 also contains a beverage medium 20 and is configured for use with a machine for forming coffee and / or tea beverages, although aspects of the present invention are not limited in this respect.

[0014] In the exemplary embodiment, the cartridge 10 includes a container 12 having an interior space 14. A filter 30 is disposed within the interior space 14 and defines a first region 14a therein. The filter 30 is configured to contain a first beverage medium 20 within the first region 14a.

[0015] In this embodiment, the container 12 can have a frusto-conical cup shape with a side wall, a closed bottom end wall 16, and an opening at the top. However, in other embodiments, the container 12 can have a fluted, conical, or cylindrical shape, can be a square or rectangular cup, a domed cup, a sphere or partial sphere, or other suitable form, can have fluted, corrugated, or other shaped side walls, and the like. Also, the container 12 does not necessarily have to have a well-defined shape, as is the case with some beverage sachets and pods. For example, the container 12 in this embodiment has a relatively rigid and / or elastic construction such that the container 12 tends to maintain its shape, but the container 12 can be made to have a more flexible and / or deformable configuration, such as, for example, a sachet made from a sheet of deformable material.

[0016] If the container 12 includes an opening, the opening can be closed by a lid 38, such as, for example, a foil and a polymer laminate material attached to the rim 19 of the container 12. In this embodiment, the rim is provided at the top end of the container 12 as an annular flange-like element, but the rim can be configured in other manners. For example, the rim can be the upper edge of the sidewall 17 without any flange element. The container 12 and / or the lid 38 can provide a barrier against moisture and / or gases, such as oxygen. For example, the container 12 can be made of a polymer laminate formed from a sheet including, for example, a layer of polystyrene or polypropylene and a layer of other barrier material, such as EVOH and / or metal foil. Such a configuration can provide the first beverage medium 20 with adequate protection from undesired exposure to, for example, moisture, oxygen, and / or other substances. However, it should be understood that the container 12 and / or the lid 38 can be made of other materials or combinations of materials, such as biopolymers, compostable polymers, paper, foil, etc.

[0017] According to one aspect of the invention, the filter 30 can be disposed within the interior volume, defining the first region 14a, and attached to the lid 38. Alternatively, the filter can be attached to the container or can be freely disposed within the container and not attached to the container or the lid. As described above, the filter 30 can be configured within the interior space 14 such that liquid introduced into the first region 14a of the interior space (e.g., interacting with the beverage medium 20) flows through the filter 30. The filter 30 can function to remove material above a certain size from the liquid, for example, to remove coffee grounds from the liquid mixed in the first region 14a, allowing the coffee beverage to pass through the filter 30 and reach the interior space below the filter. In this exemplary embodiment, the filter 30 can have a substantially dome-shaped shape. However, the filter 30 can have any suitable shape, such as a cylindrical shape, a square cup shape, a truncated cone shape, a flat sheet, etc. The filter 30 can be attached to the lid 38 in any suitable manner, such as by adhesive, heat welding, ultrasonic welding, chemical bonding, crimping, or other mechanical bonding.

[0018] As will be appreciated, various types of cartridges for use with beverage forming machines are well known in the art. The beverage cartridge 10 shown in FIG. 1 comprises a known container and filter configuration that is improved by the inclusion of a capsule 60 within the interior volume 14 of the container 12 according to one or more aspects of the present invention. Generally, the capsule 60 is configured to have a hollow interior volume with at least one chamber for housing one or more beverage media therein. The capsule is configured to enclose a beverage medium within the interior volume of the capsule to sealably house a second beverage medium during storage, but provides fluid communication between the interior volume of the capsule and the surrounding volume of the container 12 when the cartridge 10 is used to form a beverage. According to a salient aspect of one or more embodiments, the capsule 60 is specifically designed for use with existing cartridge designs and components. This facilitates the manufacture of the improved cartridge 10 without requiring significant redesign of existing components or undue interference with existing manufacturing processes.

[0019] Exemplary structural configurations of capsules according to one or more embodiments are further described herein with reference to Figures 1-5C. Figure 2 is an exploded perspective cross-sectional view of the cartridge 10 of Figure 1. Figure 3A is an exploded perspective view of the cartridge 10 including the container 12 and capsule 60, omitting the filter, lid, and beverage medium. Figure 3B is an exploded perspective cross-sectional view of the container and capsule shown in Figure 3A. Figure 4A is an isolated perspective view of the capsule 60 including the membrane 40. Figure 4B is an isolated perspective view of the capsule 60 excluding the membrane 40.

[0020] As shown, the capsule 60 is shaped like an annular disk and has a generally hollow interior volume. The capsule comprises one or more structural walls, including an annular top wall 62 extending between an inner cylindrical wall 66 and an outer cylindrical wall 64 extending in a generally vertical direction. The bottom wall of the capsule comprises a membrane 40 configured to enclose the hollow interior volume of the capsule 60. The membrane is configured to seal against a lower end 63 of the outer cylindrical wall 64 and against a lower end 67 of the inner cylindrical wall 66. Additionally, the membrane extends across the lower end of the inner cylindrical wall, thereby closing an otherwise open passageway 65 extending through the inner cylindrical wall 66. In one example, the outer cylindrical wall may have an inner diameter of 35 mm. The height of the hollow chamber within the capsule may be 8 mm. The diameter of the interior passageway formed by the inner cylindrical wall may be 6 mm. Thus, the approximate volume of the chamber in this example is 7 ml.

[0021] The capsule 60 is configured to have a hollow interior volume with at least one chamber, namely, chamber 14b. The membrane 40 is configured to selectively isolate the second chamber from the surrounding space. More specifically, the membrane is configured to seal against the capsule wall such that the contents of chamber 14b are sealed within the capsule upon storage, but provides fluid communication between the first and second chambers when the cartridge is used to form a beverage. More specifically, as described further herein, the membrane is configured to selectively separate from the cylindrical inner wall in response to injection of liquid into the interior volume, and is further configured to deflect to allow fluid to pass through the central passage 65 and into chamber 14b. The membrane is configured to separate from the wall as a function of one or more of pressure and heat from the injected liquid. Additionally, the membrane 40 is pierceable by an outlet piercing element 52 to allow liquid to exit through the perforated membrane.

[0022] Although the hollow interior volume of capsule 60 is shown as including a single chamber 14b, it should be understood that additional chambers within the interior volume of the capsule may be provided in other embodiments. For example, as shown in FIG. 6A, which is a top view of an exemplary capsule 660 with the top wall and membrane omitted for simplicity, the capsule may include radially extending interior walls 405a, 405b, and 405c extending from a cylindrical inner wall 666 to a cylindrical outer wall 664, and may define separate radially extending chambers within the interior volume of the cartridge, each of which is surrounded by a bottom membrane (not shown) and a top wall (not shown). FIG. 6B provides a bottom perspective view of capsule 660 with the membrane omitted. Similarly, although the interior volume around container 12 is shown and described as including a filter that defines a first region 14a within the interior volume, it should be understood that the interior volume of container 12 may be divided or otherwise separated into two or more portions or regions by filters, walls, partitions, passageways, and other features.

[0023] 4A-4B, according to one embodiment of the present invention, the membrane 40 can be attached to the lower end of the cylindrical outer wall 64, and similarly, to the lower end of the cylindrical inner wall 62. It should be understood that the cylindrical side walls can be formed to have a non-cylindrical or semi-cylindrical shape. For example, the lower ends of the inner wall and the cylindrical outer wall can be shaped to include annular flanges that extend toward the other side wall. Such an annular rim can provide a large contact surface between the membrane 40 and the side walls, thereby facilitating adhesion and sealing.

[0024] In the exemplary embodiment shown in FIG. 3A, the top wall 62 and membrane 40 can have a substantially flat shape, as shown. However, the top wall or membrane 40 can have any suitable shape. For example, as shown in FIG. 3B, the capsule 60 can be shaped such that the cylindrical outer wall is higher than the cylindrical inner wall, and thus the top wall slopes downward from the cylindrical outer wall to the cylindrical inner wall. Such a configuration can facilitate the flow of liquid within the container through a central passage 65 defined by the cylindrical inner wall.

[0025] The membrane 40 can be attached to the capsule wall in any suitable manner, such as adhesives, heat welding, ultrasonic welding, chemical bonding, crimping, or other mechanical bonding, and the like, and combinations thereof. In one exemplary embodiment, a food-safe adhesive is used. It should be understood that any number of different natural and synthetic food-safe adhesives that meet the requirements of the application and meet applicable government regulations and industry standards can be used. For example, Animal Glue, offered by LD Davis Corp., Jenkintown, Pennsylvania, is one example of a non-toxic, biodegradable adhesive commonly used in food packaging. Glue Dots™ by Glue Dots International, Germantown, Wisconsin, is another example of a food-safe adhesive.

[0026] The bond formed between the membrane and one or more portions of the capsule wall preferably has an adhesive strength suitable to hold during storage according to industry standard shelf life testing criteria. Importantly, at least a portion of the bond should have a suitable break point to facilitate beverage formation, as further described herein. For example, in an exemplary embodiment, attachment to the inner wall may be provided by a food-safe adhesive having a break threshold suitable to selectively break when liquid is injected with pressure into the cartridge by a typical beverage forming machine to form the beverage. The bond may also be formed such that the membrane is released from the inner wall by the effect of heat from the injected liquid.

[0027] Furthermore, the attachment between the membrane and the outer wall can be specially configured so that the membrane does not separate from the outer wall during beverage formation. In one exemplary configuration, the bond between the membrane and the outer wall can be achieved using another bonding means, for example, an adhesive configured to have a higher rupture threshold so that it does not break during beverage formation. In another exemplary configuration, the adhesive bond formed between the outer wall and the membrane and extending along or around the outer wall can be wider and therefore stronger than the bond between the membrane and the inner cylindrical wall. The resistance to separation can be defined, for example, by sizing the contact surface between one or more walls and the membrane accordingly. Furthermore, the length and width of the adhesive surface can also be defined to achieve an appropriate seal strength. For example, the membrane can have a larger diameter than the circumferential outer wall such that the membrane contacts the lower end of the outer wall and is folded or wrapped around the edge such that it extends at least partially over the outer surface of the outer wall in the direction of the upper end. FIG. 4C is a perspective view of an exemplary capsule 460 and a membrane 440 wrapped around the outer wall, according to an embodiment of the present invention. In such configurations, the membrane can also be adhered to one or more of the exterior surface of the outer wall, the lower end of the outer wall, or a combination of the foregoing. Additionally or alternatively, the membrane can be crimped circumferentially around the outer wall. It can also be appreciated that folding the membrane over the lower edge of the side wall and wrapping the membrane around the side wall can also function to mechanically resist separation. Additionally, positioning the capsule within the container 12 such that the folded edge of the membrane abuts the container wall can further function to resist separation.

[0028] As will be appreciated, the shape of the membrane 40 can depend on the shape of the opening of the capsule 60 that is sealed by the membrane. For example, in the embodiment shown in Figures 1-4B, the shape of the membrane is defined by the shape of the cylindrical outer wall 64. In this embodiment, the membrane is circular, however, oval, rectangular, triangular, irregular, and other shapes are possible to accommodate different capsule shapes and configurations. It will also be appreciated that multiple membranes can be provided, for example, in configurations where multiple openings and fluid passageways are provided within the capsule's structure.

[0029] In this exemplary embodiment, the membrane 40 may be fluid impermeable. Additionally or alternatively, the membrane may be permeable to fluids and / or gases and may be constructed from fluid impermeable materials including polymer laminates formed from sheets including layers of polypropylene and cellulosic materials, such as polystyrene or polypropylene, and layers of EVOH and / or other barrier materials. The membrane may also have an elasticity suitable for the beverage to be introduced through the inlet piercing element during beverage formation to separate the membrane from the lower end of the cylindrical inner wall and allow fluid to flow into and / or out of the capsule. Another exemplary material for the membrane, such as the membrane shown and described as being crimped around the outer wall in FIG. 4C, is a metal foil.

[0030] Exemplary features of the improved cartridge 10 including capsule 60 are further described herein in relation to Figures 5A-5C. Figure 5A is a side cross-sectional view of the cartridge shown in Figure 1, punctured by an inlet needle and an outlet needle. In this exemplary embodiment, the first region 14a contains a first beverage medium, e.g., a dry beverage medium such as tea, and sealed within the capsule 60 is another beverage medium, e.g., a dry or liquid drug, which preferably remains sealed within the capsule until it is used to form a beverage.

[0031] To form a beverage using the cartridge 10, the contents contained within the first portion 14a, and the contents within the capsule, are preferably mixed with a liquid introduced into the cartridge by a beverage formation device. Figure 5B is a cross-sectional side view showing an exemplary cartridge 10 including a beverage medium and illustrating the flow of various components of the beverage into and through the cartridge 10 during the beverage formation process.

[0032] When the cartridge 10 is used to form a beverage, the lid 38 and / or the container 12 can be pierced to introduce liquid into the cartridge and receive the beverage from the cartridge. As used herein, "beverage" refers to a liquid substance intended for drinking that is formed when the liquid interacts with one or more beverage media contained within the cartridge. Thus, a beverage refers to a liquid that is ready for consumption, e.g., a liquid that is dispensed into a cup and ready to drink, as well as a liquid that undergoes other processes or treatments, such as filtration or the addition of flavors, creamers, sweeteners, another beverage, etc., before being consumed.

[0033] For example, a portion of the lid 38 can be pierced by an inlet piercing element 50 (e.g., a needle) so that water or other liquid can be injected into the cartridge 10 to introduce liquid into the cartridge. Other inlet piercing configurations are possible, such as multiple needles, shower heads, solid needles, cones, pyramids, knives, blades, etc. The beverage machine using the cartridge can include multiple piercing elements of the same or different types, as the invention is not limited in this respect. In another configuration, the beverage machine can include a piercing element (such as a spike) that forms an opening, after which a second inlet element (such as a tube) can pass through the formed hole to introduce liquid into (or out of) the container. In other embodiments, the lid 38 can be pierced or otherwise effectively opened for flow by introducing pressure to the exterior of the lid 38. For example, the water inlet can be squeezed to seal against water pressure introduced to the exterior of the lid 38 and at that site. Water pressure can pierce or otherwise open the lid 38 to allow flow into the cartridge 10. In another configuration, the lid 38 may include a valve, conduit, or other structure that opens when exposed to an appropriate pressure and / or when mated with a water inlet tube or other structure.

[0034] The capsule 60 is configured such that during the beverage formation process, the beverage ingredients formed by mixing the liquid with the first beverage medium are also mixed with the beverage medium stored within the capsule 60. As noted above, the membrane of the capsule can be selectively opened by a frangible seal that allows fluid communication between an area outside the capsule and a chamber within the capsule. In one exemplary embodiment, when pressurized liquid is introduced into the first region 14a, the membrane functions to allow the beverage mixed in region 14a to flow into the capsule (e.g., chamber 14b).

[0035] More specifically, as shown in FIG. 5B, when pressurized liquid is introduced into the interior 14 through the lid, the liquid mixes with any contents of the region 14a and flows through the filter. The mixture then flows into a central passage 65 defined by the cylindrical inner wall 66 of the capsule 60. Because the membrane 40 extends across the (cylindrical) inner wall 66 and is attached to its lower end, pressure (and / or heat) on the membrane 40 from the liquid in the passage 65 causes adhesion between the membrane and the inner cylindrical wall such that it yields to the fluid pressure. Furthermore, as shown in FIG. 5C, a cross-sectional side view of the capsule during the beverage formation process, pressure from the liquid causes the membrane to separate from the lower end, allowing the liquid to flow into the chamber and thus mix with the contents of the chamber. Preferably, the attachment between the membrane and the cylindrical outer wall is not broken by the fluid pressure. Thus, the exemplary capsule configuration and its application in which the piercing outlet needle penetrates both the bottom of the cup and the bottom membrane of the capsule 60 functions to direct the flow of water through the chamber.

[0036] In some configurations, the membrane can be made of a material having suitable elasticity to be pushed away from the bottom end. Additionally or alternatively, the membrane can be configured to naturally separate from the bottom end when the bond is broken, allowing fluid communication between the interior and exterior of the capsule 60. Thus, in some configurations, the capsule is positioned slightly above the bottom of the container 12 such that the bottom wall does not impede separation of the membrane from the cylindrical inner wall 66.

[0037] The cartridge 10 may also be pierced by an outlet piercing element 52 (e.g., a needle) at the bottom 16 of the container 12. As with the inlet piercing configuration, the outlet piercing configuration may be modified in any suitable manner. As shown in Figs. 5A and 5B, the container 12 and capsule 60 may be configured such that the outlet piercing element 52 pierces the bottom of the container and the bottom surface of the capsule 60 (e.g., through the membrane 40) such that liquid introduced into the cartridge and flowing into the capsule 60 may exit the cartridge through an outlet provided by the outlet piercing element 52. Thus, the outlet piercing element may include one or more hollow or solid needles, knives, blades, tubes, etc. Also, in this exemplary embodiment, the piercing element remains in place to receive the beverage as it exits the opening formed in the container 12. However, in other embodiments, the piercing element may be withdrawn after forming the opening, allowing the beverage to exit the opening and be received without the piercing element being extended into the cartridge 10. Although the above-described embodiments are described as including a single beverage medium in the first region 14a and a single beverage medium in the chamber 14b inside the capsule 60, these embodiments can include less than one or more beverage media. For example, the cartridge can include ground coffee in one interior region of the container and a creamer in the capsule, allowing the cartridge to form a beverage such as a cappuccino or a latte. In another embodiment, the interior volume of the container can be divided into multiple regions having respective beverage ingredients in addition to including a capsule that contains one or more ingredients therein. In yet another embodiment, the capsule can include multiple beverage media provided in respective chambers inside the capsule or mixed in one or more chambers inside the capsule. For example, the capsule can include multiple chambers for containing the individual ingredients and / or mixtures of ingredients that make up the medicine.

[0038] Other combinations will occur to those skilled in the art. In some embodiments, additional filters, permeable or impermeable membranes or walls may be provided within a given chamber of the container 12 and / or capsule to separate multiple beverage media. Similarly, a filter may be provided to separate the beverage medium from the fluid passage through the capsule. Additionally, another filter may be provided, for example, to separate the beverage medium from a fluid inlet or outlet.

[0039] As mentioned above, the capsule 60 is preferably shaped to fit within the container 12 near the bottom 16. For example, in the exemplary embodiment shown in Figures 5A-5C, the outer wall of the capsule 60 can be designed to have a diameter that matches the inner diameter and angle of the inner wall of the container 12 near the bottom end 16 and extend vertically at such an angle so that the capsule can fit right into the existing container 12 to maximize the volume within the capsule and rely on a friction fit to keep the capsule 60 in place. Furthermore, because the container 12 is frusto-conical in shape, it can be appreciated that the bottom diameter of the outer wall of the capsule 60 can be sized such that when properly seated within the capsule, the capsule is positioned close to the bottom wall 16 of the container 12 but still has a separation that is suitable to a) allow puncture of the bottom wall 16 and membrane 40 by the outlet needle, and b) allow the membrane 40 to deflect and allow fluid to flow through the capsule 60 and out of the cartridge 10 during beverage formation.

[0040] The basic capsule configuration can be further enhanced by including additional features to maintain the capsule in a preferred position within the container. For example, Figures 7A and 7B are cross-sectional and exploded cross-sectional views, respectively, of an exemplary capsule 760 having legs 767. The cross-sectional views of Figures 7A and 7B omit the membrane and show only two legs, while Figure 7C is a top view of capsule 760 having four legs. It should be understood that more or fewer legs can be provided.

[0041] As shown in Figures 7A-7B, the legs 767 are positioned near the periphery of the top surface 762 of the capsule 760. The legs also extend vertically from the top surface 762 of the capsule, in a direction from the bottom of the container 712 toward the lid (not shown) and the top end of the container 712. The legs are provided to support the lid and thus maintain the capsule close to the bottom surface of the container and to prevent the capsule from moving substantially vertically before and during use. The legs are positioned near the outer edge of the capsule body and are sized and shaped so as not to significantly interfere with the filter and its operation. The legs also have a length suitable for supporting the lid.

[0042] Additionally or alternatively, feet or similar structural reinforcement members can be provided to support other components of the cartridge assembly. For example, reinforcement members can be provided to support one or more walls of the container 12. Additionally or alternatively, reinforcement members can be provided to support the filter 30, and in such a configuration are preferably shaped to avoid puncturing or tearing the filter.

[0043] 8A and 8B are cross-sectional and exploded cross-sectional views of an exemplary configuration of cartridge 800, showing another exemplary configuration for maintaining the capsule in place within container 812. As shown, at least the inner wall of the container can include one or more peripheral lips or ribs 819 near the bottom end of the container. Alternatively, the conventional cartridges described in the aforementioned patent documents can be crimped inwardly from the outer wall using heat in contact with the cartridge material to form ribs 819. The outer wall of capsule 860 can be formed to include a ring-shaped groove 869 having a shape complementary to lip 819. Thus, the lip 819 and groove 869 of complementary size and shape can be configured to snap-fit ​​together, thereby holding capsule 860 in place and resisting movement.

[0044] Cartridges according to aspects of the present invention can be used with any suitable beverage machine. For example, FIG. 10 shows a perspective view of a beverage forming device 100 that can be used to form any suitable beverage, such as tea, coffee, other pour-over type beverages, beverages formed from liquid or powder concentrates, hot or cold beverages, etc. In this exemplary embodiment, the device 100 includes an outer frame or housing 6 with a user interface 8 that a user can manipulate to control various features of the device 100. A beverage cartridge can be provided to the device 100 and used to form a beverage that is placed in a cup or other suitable container that is placed on a drip tray 9 or other support, if present. The cartridge can be placed manually or automatically in a cartridge receiving portion defined by a first portion 3 and a second portion 4 of the beverage forming device 100. For example, by lifting a handle 5, a user can move the first portion 3 and the second portion 4 to an open position to expose a suitably shaped area in which the cartridge can be placed. After placement of the cartridge, the handle 5 or other actuator can be manually or automatically actuated to move the first portion 3 and the second portion 4 to a closed position (shown in FIG. 10), thereby enclosing the cartridge at least partially within the extraction chamber. However, it should be understood that the cartridge can be received by the device 100 in any suitable manner, as the manner in which the device 100 receives or otherwise uses the cartridge is not critical to the embodiment of the present invention.

[0045] Once the cartridge is received, the beverage formation device 100 can form a beverage using the cartridge. For example, one or more inlet needles associated with the first part 3 or the second part 4 can pierce the cartridge to inject hot water or other liquid into the cartridge. The first part 3 or the second part 4 can also include one or more outlet needles or other elements for puncturing or piercing the cartridge at the outlet side (as appropriate) to allow the formed beverage to exit the cartridge.

[0046] Another aspect of the invention includes methods of manufacturing capsules and improved cartridges including capsules according to one or more embodiments of the invention. Steps of one such exemplary method are shown in Figure 9. (The steps in Figure 9 are shown connected by dashed lines to indicate that the method steps may be performed in a different order than shown, as described in more detail below.)

[0047] In step S10, a container is provided having an interior space and a rim defining an opening to the interior space. The container can be made of any suitable material, such as plastic, paper, metal, and combinations of materials. In general, the container is impermeable to liquids, but may have permeable portions, so that the beverage produced in the cartridge can be removed in a controlled manner. Also, the container can have any suitable shape, such as a truncated cone, a sphere, a cylinder, a rectangular box, etc. Furthermore, the container need not have a well-defined shape, but may instead be made of a flexible material.

[0048] In step S20, a filter is provided. In some configurations, the filter can be configured to contain a first beverage medium and can be attached to a periphery of the lid, the periphery being a closed boundary where the filter is attached to the lid and extends outwardly from the lid (e.g., into the interior space of the container). The filter can include any suitable material, such as filter paper, permeable or impermeable plastic material, sponge-like material, etc. Also, the filter can include impermeable and permeable elements. For example, an impermeable plastic element can be attached to the lid to provide structural support to the filter paper or other material attached to the plastic element. The filter can have any suitable shape, size, and / or permeability. For example, the filter can have areas of different permeability to prevent or restrict flow through some areas of the filter while promoting flow through other more permeable areas. Alternatively or additionally, the filter can be attached to the container. As a further alternative, the filter can be freely positioned within the first region, not attached to the lid or container.

[0049] In step S30, a capsule suitable for being placed in the container and positioned at the bottom of the chamber is provided. Preferably, the capsule is sized and shaped to fit in the container, avoiding substantial damage to the filter, and to contain a suitable amount of beverage medium for the intended purpose. For example, the capsule may be an annular disk-shaped capsule with a wall sized and shaped as described above.

[0050] In step S35, a beverage medium is provided into the interior space of the capsule, for example into a hollow chamber provided in the capsule. The capsule chamber can be filled with the beverage medium through an opening provided in the bottom of the capsule. The beverage medium can be a liquid or a dry medium and can be configured to interact with a liquid introduced into the container to form a beverage.

[0051] In step S40, a membrane is attached to seal the capsule. For example, in the exemplary configuration shown in FIG. 4A, the membrane is attached to the lower end of the cylindrical inner wall 62 and also to the lower end of the cylindrical outer wall 64. Additionally or alternatively, the membrane can be crimped circumferentially around the cylindrical outer wall. The membrane can include any suitable fluid-impermeable material, including one or more of metal foil, polypropylene, a polymer laminate formed from a sheet including a layer of a cellulosic material, e.g., polystyrene or polypropylene, and a layer of EVOH and / or other barrier material. Also, the membrane can have a suitable elasticity. Furthermore, the attachment to the inner wall can have a suitable breaking point to allow a beverage introduced into the cartridge during beverage formation to break the seal and at least partially separate the membrane from the capsule wall, thereby allowing fluid to flow in and out of the capsule.

[0052] The attachment can be performed in one or more steps, for example, attachment to the cylindrical inner wall can be performed first, followed by attachment of the membrane to the cylindrical outer wall. Furthermore, attachment to the inner wall can be performed using a first attachment means, such as, for example, a food-safe adhesive having a suitable rupture threshold to selectively rupture when liquid is injected into the cartridge to form the beverage. Furthermore, attachment to the outer wall can be achieved using another attachment means, such as, for example, an adhesive configured to maintain a strong bond during beverage formation.

[0053] In step S45, the capsule assembly is placed within the interior volume of the container and placed in a predetermined position.

[0054] In step S50, a lid is attached to the rim (e.g., at least partially to close the opening). The lid can be attached to the rim in any suitable manner, such as thermal or sonic welding, adhesive, chemical bonding, mechanical bonding, etc. In some embodiments, the rim can include grooves or other features that aid in the removal of the lid from the rim. The lid can be made of any suitable material, such as foil, foil and polymer laminate, polymeric material, etc., and can be permeable or impermeable. However, the lid is generally made of a fluid-impermeable material to help control the flow of liquid within the cartridge.

[0055] In step S60, a beverage medium is provided into the interior space of the cartridge, for example into a first region defined by a filter. The beverage medium may be contained by the filter and may be configured to interact with a liquid introduced into the container to form a beverage, and may include roast and ground coffee, tea leaves, instant coffee or tea, hot chocolate mix, powdered beverage mix, dried fruit ingredients, sweeteners, creamers, thickeners, and / or any other suitable ingredients for forming a beverage.

[0056] It should be understood that the steps of the method outlined in Figure 9 may be performed in any suitable order. For example, in one embodiment, the first beverage medium may be provided in the space defined by the membrane and filter before the membrane and filter are attached to the lid or container. In another embodiment, the first beverage medium may be provided in the space defined by the membrane and filter after the membrane and filter are attached to the lid or container.

[0057] Having thus described several aspects of at least one embodiment of this invention, it should be appreciated that various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be part of this disclosure, and are intended to be within the scope of the invention. Accordingly, the foregoing description and drawings are by way of example only.

Claims

1. An improved ingredient capsule and cartridge for forming a beverage in a beverage machine providing pressurized liquid, said cartridge having a container defining an interior space, a lid closing an open top end of said container and pierceable by said beverage machine to accommodate an inflow of liquid into said interior space to form said beverage, a filter disposed within said interior space and containing a first beverage medium configured to interact with said liquid introduced into said container to form said beverage, and a bottom end of said container pierceable by a bottom outlet piercing element of said beverage machine to accommodate an outflow of said beverage from said interior space, said improvement comprising: a capsule positioned within the cartridge such that a membrane of the capsule is disposed adjacent to the bottom end of the container and such that the bottom end of the container and the membrane can be pierced by the bottom outlet piercing element to allow the beverage to flow through the perforations; a body having an annular, disc-shaped and hollow interior chamber surrounding a central passageway, the body having an open lower end, the body being sized and shaped to be disposed within the interior space of the container such that the lower end of the body is positioned adjacent to the lower end of the container; a membrane attached to the body and closing the bottom end and the central passage of the body, the membrane being configured to selectively provide fluid communication between the interior space of the container and the interior chamber such that pressurized liquid introduced into the interior space of the container can flow through the central passage into the interior chamber, the membrane being pierceable by the bottom outlet piercing element of the beverage machine to accommodate the outflow of liquid flowing through the membrane into the interior chamber and out of the bottom end of the container when pierced; and a beverage medium provided within the internal chamber and sealed therein by the membrane, the beverage medium being configured to interact with the liquid introduced into the container and flowing into the internal chamber to form the beverage.

2. 2. The capsule of claim 1, wherein the annular, disk-shaped body comprises an outer wall including an annular upper wall extending between an inner cylindrical wall and an outer cylindrical wall, the inner cylindrical wall and the outer cylindrical wall extending in a generally vertical direction, the inner cylindrical wall defining the central passage, and the membrane extending over a lower end of the inner cylindrical wall and enclosing a hollow central passage that would otherwise be a hollow central passage.

3. 3. The capsule of claim 2, wherein the membrane is attached to lower ends of the outer cylindrical wall and the inner cylindrical wall, and the attachment between the membrane and the inner cylindrical wall is configured to rupture in response to the introduction of the pressurized liquid, thereby providing fluid communication between the interior space of the container and the interior chamber.

4. 4. The capsule of claim 3, wherein the membrane is bonded to the lower end of the inner cylindrical wall using a food-safe adhesive having a predetermined bond strength such that a stress applied to the membrane through the central passageway that exceeds a predetermined threshold will cause the adhesive bond to rupture.

5. 5. The capsule of claim 4, wherein the membrane is configured to separate from the lower end of the cylindrical inner wall to allow liquid introduced into the interior space of the container to flow through the central passage into the interior chamber of the capsule, and wherein the outer wall of the capsule has a diameter such that the capsule is mounted within the container of the cartridge with the lower end of the capsule and the membrane positioned adjacent to the lower end of the container to allow piercing while still having a separation that allows the membrane to separate from the lower end of the cylindrical inner wall.

6. 5. The capsule of claim 4, wherein the membrane is sealingly joined to at least a portion of the outer cylindrical wall using an adhesive configured to maintain a seal when liquid is introduced into the interior space of the container.

7. The capsule of claim 6 , further comprising a plurality of chambers extending radially within the interior volume of the internal chamber.

8. The capsule of claim 4 , wherein the membrane extends beyond the periphery of the outer cylindrical wall and is circumferentially crimped around the outer cylindrical wall.

9. 2. The capsule of claim 1, further comprising one or more legs extending vertically from a top wall of the capsule, the one or more legs configured to support the capsule against the lid of the cartridge when the capsule is positioned within the interior space of the container and the lid is applied.

10. The capsule of claim 2 , further comprising a plurality of chambers within the interior volume of the internal chamber.

11. 11. The capsule of claim 10, further comprising one or more partition walls extending radially from the inner cylindrical wall to the outer cylindrical wall and defining the plurality of chambers.

12. The capsule of claim 1 further comprising the cartridge.

13. 13. The capsule of claim 12, wherein an inner surface of the container of the cartridge includes a lip, and an outer wall of the body of the capsule includes a recess configured to matingly engage with the lip when the capsule is disposed within the container.

14. 13. The capsule of claim 12, wherein the outer wall of the capsule has a diameter such that the capsule is mounted within the container of the cartridge with the bottom end of the capsule and the membrane positioned adjacent the bottom end of the container to allow piercing that still has a separation that allows the membrane to separate from the bottom end of the capsule.

Images