Coffee pod having a flexible microporous or microperforated casing

摘要

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.

主权项

1. A coffee pod which can be used in machines for preparing and dispensing coffee beverages of the type comprising at least one extraction chamber and at least one tamping piston to tamp a determined quantity of ground coffee inserted in said extraction chamber, said 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, and an external 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 wherein said casing presents solidity and stretch properties allowing de-compacting of the coffee aggregate contained in the casing, by changing shape and increasing volume and allowing the swelling of the moistened pod after injection of pressurized water through the casing, without the casing becoming torn via compression.