Method for delivering a long coffee extract from a capsule...

A - Human Necessities – 47 – J

Patent

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A47J 31/00 (2006.01)

Patent

CA 2658600

Method for delivering a long coffee extract from a capsule containing ground coffee within a flow time of 50 seconds or less by injection of water under pressure within the capsule. The capsule is filled with ground coffee and has a delivery membrane. The capsule is extracted in a coffee extraction device, and pressurized water is injected in the capsule under pressure. The coffee beverage is released through the beverage delivery membrane of the capsule with engaging means engaging in and/or against the membrane. The pressure loss is reduced in the coffee bed by providing in the capsule coffee ground having a controlled percentage of fines (F) depending on the average particle size (D4,3). The flow time can be lowered to 40 seconds or even less while maintaining a coffee extraction yield within a high range of 15 to 30%.

L'invention concerne un procédé de libération d'un extrait de café long à partir d'une capsule contenant du café moulu dans un temps d'écoulement inférieur ou égal à 50 secondes par injection d'eau sous pression dans la capsule. La capsule est remplie de café moulu et présente une membrane de libération. La capsule est extraite dans un dispositif d'extraction de café et de l'eau sous pression est injectée dans la capsule sous pression. La boisson de café est libérée à travers la membrane de libération de boisson de la capsule, des moyens de contact s'engageant dans et/ou venant en contact contre la membrane. La perte de pression est réduite dans le lit de café par insertion, dans la capsule, de café moulu présentant un pourcentage contrôlé de particules fines (F) dépendant de la dimension moyenne des particules (D4.3). Le temps d'écoulement peut être abaissé à 40 secondes ou même moins tout en maintenant un rendement d'extraction de café dans une plage élevée comprise entre 15 et 30%.

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