A coffee pod which can be used for machines for preparing and dispensing coffee beverages that comprise at least one extraction chamber, and at least one piston for compacting a predetermined amount of ground coffee inserted into the extraction chamber. The pod includes: a predetermined amount of gr
A coffee pod which can be used for machines for preparing and dispensing coffee beverages that comprise at least one extraction chamber, and at least one piston for compacting a predetermined amount of ground coffee inserted into the extraction chamber. The pod includes: a predetermined amount of ground coffee compacted into an aggregate of ground coffee beans, having an outer shape suitable for rolling, and preferably a substantially spherical ball shape; and a filter casing formed of at least one pervious, microporous or microperforated sheet or film, trapping and matching the shape of the compacted coffee aggregate. The sheet or film is flexible, having stretchability properties with an elongation at rupture of at least 30% and an ultimate tensile strength of less than 2,000 N/m, and a thickness of at least 150 μm.
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1. A method for preparing a coffee beverage using a pod comprising: about 5 to 15 g of compacted aggregate of ground coffee, said compacted aggregate having a density that is about 0.65 to 0.75 kg/dm3 and having a spherical shape of about 20 to 40 mm in diameter, anda filtering casing formed of at l
1. A method for preparing a coffee beverage using a pod comprising: about 5 to 15 g of compacted aggregate of ground coffee, said compacted aggregate having a density that is about 0.65 to 0.75 kg/dm3 and having a spherical shape of about 20 to 40 mm in diameter, anda filtering casing formed of at least one permeable, microporous or micro-perforated sheet or film trapping and following the contour of and molded against said compacted aggregate of coffee, wherein said sheet or said film is flexible having stretch properties with an ultimate elongation of at least 30%, an ultimate tensile strength of less than 2,000 N/m and a thickness of about 150 to 500 μm; said pod is used in a coffee machine comprising an extraction chamber capable of receiving—said pod and at least one compression piston and one ejection piston for said pod—inside said extraction chamber, said method comprising performance of the following successive steps: 1) inserting said pod into said extraction chamber of a coffee machine,2) compressing said pod at a pressure of 500 to 1,500 kPa inside said extraction chamber using said compression piston until said pod is crushed and deformed and said compacted aggregate of ground coffee contained in said casing is de-compacted so as to form a de-compacted pod, wherein said easing continues to follow the contour of and is molded against the compacted aggregate, without rupture of said casing,3) injecting a quantity of hot pressurized water, pressurized to a pressure of 2 to 20 bars (200 KPa to 2 MPa), through said de-compacted pod so as to form a wet de-compacted pod,4) collecting a beverage in a suitable recipient, said beverage containing coffee aromas solubilised in said hot water, extracted under pressure through said pod at step 2), and5) evacuating said wet de-compacted pod to outside said extraction chamber using the ejection piston, said wet de-compacted pod having a different shape from and a larger volume than that of the pod in step 1). 2. The method of claim 1, wherein the water of step 3) is at a temperature of 85 to 100° C. 3. The method of claim 2, wherein the water of step 3) is at a temperature of 86 to 96° C. 4. The method according to claim 1, wherein said casing has a gram weight of between 20 and 50 g/m2. 5. The method according to claim 1, wherein said casing is formed of a nonwoven material of entangled synthetic fibres, the largest size of said surface micropores being 0.15 to 0.30 mm. 6. The method according to claim 1, wherein said casing is formed of a film of microperforated synthetic plastic material, the largest size of said microperforations being 0.15 to 0.30 mm, and said film having a surface density of perforations of 50 to 250 perforations/cm2. 7. The method according to claim 5, wherein the constituent material(s) of said casing are selected from the group consisting of: polyethylene, polypropylene, polyester and viscose. 8. The method according to claim 5, wherein said casing is formed of a nonwoven material of polyester fibres coated with polyethylene. 9. The method according to claim 7, wherein said pod is formed of a film of polyethylene or polypropylene. 10. The method according to claim 1, wherein said casing comprises two semi-casings sealed onto each other along at least one continuous junction line peripheral to the pod, the constituent material of said casing having a melt temperature higher than 100° C. 11. The method according to claim 10, wherein said two semi-casings are symmetrical and semi spherical and sealed onto each other by heat welding. 12. The method according to claim 1, wherein said quantity of compacted coffee is 5 to 8 g, and the density of the compacted ground coffee forming said compacted aggregate is 0.68 to 0.72 kg/dm3. 13. The method according to claim 1, wherein said pod is substantially spherical with a diameter of 24 to 34 mm. 14. The method according to claim 13 said pod has a diameter of 26 to 30 mm.
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이 특허에 인용된 특허 (8)
Dijs,Daniel Albertus Jozef, Assembly for use in a coffee machine for preparing coffee.
Adam Gabriel H. (Roswell GA) Cotton James D. (Marietta GA) Durocher Donald F. (Roswell GA) Peterson Richard M. (Marietta GA), Hydraulically entangled, autogenous-bonding, nonwoven composite fabric.
Colston, Martin E.; Gee, Christopher J.; Shaw, Jon W.; Pope, Kevin C.; Cooke, John C.; Caroen, Adrian B.; Rivin, Evgeny I.; Fey, Victor R., Methods and apparatus for brewing beverages.
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