IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0374825
(2007-07-11)
|
등록번호 |
US-8231918
(2012-07-31)
|
우선권정보 |
EP-06015331 (2006-07-24) |
국제출원번호 |
PCT/EP2007/057072
(2007-07-11)
|
§371/§102 date |
20090123
(20090123)
|
국제공개번호 |
WO2008/012203
(2008-01-31)
|
발명자
/ 주소 |
- Ohresser, Sylvia
- Eichler, Paul
- Koch, Peter
- Raetz, Ernest
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
2 |
초록
▼
A method for delivering a short coffee extract faster from a closed capsule containing ground coffee by injecting water under pressure within the capsule. The capsule is filled with ground coffee, has a delivery membrane and is extracted in a coffee extraction device and pressurized water is injecte
A method for delivering a short coffee extract faster from a closed capsule containing ground coffee by injecting water under pressure within the capsule. The capsule is filled with ground coffee, has a delivery membrane and 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 ground coffee having a reduced percentage of fines (F) depending on the average particle size (D4,3). The extraction yield is maintained between 15 and 30% and the coffee extract of 25 or 40 grams is delivered in a flow time of 20 seconds or less.
대표청구항
▼
1. A method for delivering a coffee extract of 25 to 40 grams from a capsule containing ground coffee within a flow time of 20 seconds or less by injection of water under pressure within the capsule, which comprises: providing a ground coffee containing capsule for extraction in a coffee extraction
1. A method for delivering a coffee extract of 25 to 40 grams from a capsule containing ground coffee within a flow time of 20 seconds or less by injection of water under pressure within the capsule, which 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; andreducing 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 300 microns, and a controlled percentage of fines (F) depending on the average particle size (D4,3) within the following limits:F is between 14 and 18% when D4,3 is between 250 and 299 microns,F is between 17 and 21% when D4,3 is measured between 200 and 249 microns, andF is between 22 and 28% when D4,3 is measured between 150 and 199 microns. 2. The method according to claim 1, wherein the capsule provides an extraction yield (Y) that is maintained between 18 and 30%. 3. The method according to claim 2, wherein the extraction yield (Y) is between 19 and 25%. 4. The method according to claim 2, wherein the capsule is filled with a coffee mass of from about 4.5 to 6 grams. 5. The method according to claim 2, wherein the capsule is filled with a coffee mass of about 5 grams. 6. The method according to claim 2, wherein the flow time is reduced to less than about 15 seconds. 7. The method according to claim 6, wherein the coffee extract has a crema which is stable at a sugar test for at least 10 to 15 seconds. 8. The method according to claim 1, wherein the pressure loss at the interface of the membrane and engaging means is increased by selecting a membrane made of aluminum having a thickness of between 26 and 40 microns. 9. The method according to claim 8, wherein the level of fines is controlled by having coffee beans ground before the filling in the capsule, wherein the beans are ground using a grinder comprising a fine grinding section that includes at least one pair of radially corrugated rolls. 10. The method according to claim 1, wherein the water pressure injected into the capsule reaches a value higher than 11 bar during extraction. 11. The method according to claim 1, wherein the ground coffee is not compacted in the capsule after filling. 12. The method according to claim 11, wherein the ground coffee is densified before filling or is filled loose. 13. The method according to claim 1, wherein the membrane is torn against engaging means by effect of the pressure of extraction for release of the coffee extract out of the capsule. 14. The method according to claim 1, wherein the engaging means comprises a plurality of reliefs. 15. A method for delivering a coffee extract of 25 to 40 grams from a capsule containing ground coffee within a flow time of 20 seconds or less 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;providing the capsule with a delivery membrane having a puncture resistance of between 1.1 and 3.5 mJ;providing coffee ground using a grinder comprising a fine grinding section that includes at least one pair of radially corrugated rolls to provide ground coffee having an average particle size of less than 300 microns, and a controlled percentage of fines (F) depending on the average particle size (D4,3) within the following limits:F is between 14 and 18% when D4,3 is between 250 and 299 microns,F is between 17 and 21% when D4,3 is measured between 200 and 249 microns, andF is between 22 and 28% when D4,3 is measured between 150 and 199 microns;filling the capsule with a bed of the ground coffee wherein the delivery membrane initially retains the ground coffee in the capsule; anddelivering a coffee beverage after the water pressure injected into the capsule reaches a value higher than 11 bar by releasing the coffee beverage through the delivery membrane of the capsule with engaging means engaging in or against the membrane to provide an exit for the coffee beverage, thus delivering a coffee beverage having an extraction yield of between 18 and 30%. 16. The method according to claim 2, wherein the extraction yield (Y) is between 19 and 25%. 17. The method according to claim 2, wherein the capsule is filled with a coffee mass of from about 4.5 to 6 grams. 18. The method according to claim 15, wherein the pressure loss at the interface of the membrane and engaging means is increased by selecting a membrane made of aluminum having a thickness of between 26 and 40 microns. 19. The method according to claim 15, wherein the flow time is reduced to less than about 15 seconds. 20. The method according to claim 15, wherein the coffee extract has a crema which is stable at a sugar test for at least 10 to 15 seconds.
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