초록 ▼

A capsule (1) sealed without an internal filter. The capsule includes a cup-shaped body (2) with an outwardly projecting flange (2a), and a flexible lid (3) welded to the flange (2a) to define with the latter a sealed chamber (4) which is impermeable to oxygen and moisture and contains a quantity of

A capsule (1) sealed without an internal filter. The capsule includes a cup-shaped body (2) with an outwardly projecting flange (2a), and a flexible lid (3) welded to the flange (2a) to define with the latter a sealed chamber (4) which is impermeable to oxygen and moisture and contains a quantity of granular material (5). The granular material (5) is first compressed inside the chamber (4) in a direction perpendicular to the plane containing the flange (2a), with a compressive load preferably of between 2 and 50 Kg per cm2 of the average cross-sectional area of the chamber (4), so as to form a compact tablet (5) of the material. A vacuum is formed inside the chamber (4) to a degree such that the lid (3) adheres to the upper surface of the tablet (5).

대표청구항 ▼

1. A sealed capsule, for the preparation of a beverage, by means of pressurised extraction, comprising: a cup-shaped body having a flange at the top projecting radially outwards; anda flexible lid, welded to the flange of the cup-shaped body so as to define with the latter a sealed chamber which is

1. A sealed capsule, for the preparation of a beverage, by means of pressurised extraction, comprising: a cup-shaped body having a flange at the top projecting radially outwards; anda flexible lid, welded to the flange of the cup-shaped body so as to define with the latter a sealed chamber which is impermeable to oxygen and moisture and contains a quantity of material in the form of granules for preparation of the beverage,wherein the granular material is preliminarily compressed inside said chamber in a direction perpendicular to a plane containing the flange with a compressive load between 2 and 50 Kg per cm2 of the average cross-sectional area of the chamber, so as to form a compact tablet of said material, andwherein a vacuum is formed inside said chamber to a degree such that the lid adheres to the upper surface of said tablet. 2. The capsule according to claim 1, wherein the cup-shaped body is substantially frustoconical and said chamber has a height roughly equal to half its average cross-sectional dimension. 3. The capsule according to claim 2, wherein said chamber has a height (E) of between about 15 and 19 mm and the granular material contained therein is such that the granular material forms a compressed tablet having a height of between about 12 and 15 mm and between about 15 and 19 mm, respectively. 4. The capsule according to claim 3, wherein said chamber has a height (E) of about 17 mm and the granular material contained therein is such that the granular material forms a compressed tablet having a height of between about 13 and 17 mm. 5. The capsule according to claim 1, wherein during use, the capsule is perforated beforehand along the bottom wall of the cup-shaped body before injection of an extraction fluid through the lid, the bottom wall of the cup-shaped body having a thickness of between 150 and 400 μm. 6. The capsule according to claim 5, wherein the bottom wall of the cup-shaped body has a thickness of between 150 and 220 μm. 7. The capsule according to claim 5, wherein the capsule is adapted to receive, during use, an extraction fluid at a pressure of between 4 and 11 bar. 8. The capsule according to claim 1, wherein the capsule contains ground roasted coffee, with a size of the coffee granules ranging between 180 and 400 μm.