Method for extracting espresso coffee particularly from a...

A - Human Necessities – 47 – J

Patent

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A47J 31/00 (2006.01) A47J 31/40 (2006.01)

Patent

CA 2651921

A method for extracting an espresso coffee beverage by means of an espresso coffee machine, comprising: a) a step for providing an extraction chamber, which comprises a dose of roasted and ground espresso coffee and a normally-closed septum which is arranged downstream of the coffee dose; b) a step for injecting hot water into the chamber, outward dispensing of the beverage being prevented through the normally-closed septum; c) an extraction step in which, when the water pressure reaches a preset value, the partition is opened in order to force the beverage to pass through a small orifice before it is dispensed into the cup, the size of the orifice being such as to keep the dose of coffee contained in the extraction chamber at a substantially uniform pressure along the direction of the flow of hot water, so that the espresso coffee beverage extracted through the orifice comprises crema. The espresso coffee obtainable with the method comprises a crema which has a bubble diameter distribution which is substantially uniform in the 20- 150 micron interval.

La présente invention concerne un procédé d'extraction d'un café expresso au moyen d'une machine à expresso, comprenant : a) une étape consistant à fournir une chambre d'extraction qui comprend une dose de café expresso torréfié et moulu et une cloison normalement fermée disposée en aval de la dose de café; b) une étape consistant à injecter de l'eau chaude dans la chambre, la distribution vers l'extérieur de la boisson étant évitée au moyen de ladite cloison; c) une étape d'extraction dans laquelle, lorsque la pression de l'eau atteint une valeur prédéfinie, la séparation est ouverte dans le but d'obliger la boisson à passer par un petit orifice avant d'être distribuée dans la tasse, la taille de l'orifice étant telle qu'elle maintient la dose de café contenue dans la chambre d'extraction à une pression sensiblement uniforme dans le sens d'écoulement de l'eau chaude, de sorte que l'expresso extrait par l'orifice comprend de la crème. L'expresso pouvant être obtenu avec le procédé comprend une crème dont la répartition du diamètre des bulles est sensiblement uniforme dans l'intervalle de 20 à 150 microns.

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