Patent ID: 8088423

Claim:
A method for delivering a coffee extract from a capsule containing ground coffee within a flow time of less than 35 seconds per 110 g extract by injection of water under pressure within the capsule, which method comprises: providing a ground coffee containing capsule for extraction in a coffee extraction device where water is injected into the capsule under pressure to deliver the coffee extract, the capsule having a delivery membrane and filled with a bed of ground coffee; wherein the delivery membrane initially retains the ground coffee therein until the coffee beverage is released through the delivery membrane of the capsule with engaging means engaging in or against the membrane to provide an exit for the coffee beverage; and reducing pressure loss at the interface of the membrane and engaging means by providing a membrane having a puncture resistance of between 1.1 and 3.5 mJ; and by providing in the capsule ground coffee having an average particle size of less than 350 microns, and a controlled percentage of fines (F) depending on the average particle size (D4,3) within the following limits: F is between 12 and 16% when D4,3 is measured from 300 to 349 microns, and F is between 14 and 18% when D4,3 is measured from 250 to 299 microns.