SEALED CAPSULE FOR THE PREPARATION OF A BEVERAGE, IN PARTICULAR COFFEE
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United States of America Patent
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Issued Date -
Jul 2, 2015
app pub date -
Aug 12, 2013
filing date -
Aug 13, 2012
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Abstract
A capsule including a cup-shaped body with a protruding top flange, a lateral wall, a flexible bottom wall, and a flexible cover welded to the flange to define a sealed chamber containing ground roasted coffee. The coffee is compressed within the chamber to form a compact panel, and a vacuum is provided such that the cover moves towards the upper surface of the panel. Between the flange and the bottom wall, the lateral wall of the body has an annular step formation providing a local reduction in the cross-section of the chamber towards the bottom wall. This step formation is closer to the bottom wall than to the flange and provides a local reduction in the cross-section of the chamber of at least about 25%. The bottom wall of the body is deformable under the effect of the fluid introduced into the capsule, being displaced away from the cover.
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