초록 ▼

A powdered substance, which is suitable for preparation of a beverage with an extraction fluid, is extracted for preparation of a beverage. The substance which is compacted in a form of a cake, is contained within a sachet between two sachet sheets which, prior to extraction of the substance, protec

A powdered substance, which is suitable for preparation of a beverage with an extraction fluid, is extracted for preparation of a beverage. The substance which is compacted in a form of a cake, is contained within a sachet between two sachet sheets which, prior to extraction of the substance, protect the substance against oxygen and water vapor and which extend to sealed edges for containing the substance within the sheets prior to and during extraction. In effecting extraction, one sheet is perforated to provide at least one opening for injection of extraction fluid, and extraction fluid is injected under pressure into the sachet for contacting and deforming the compacted substance cake and for extracting the substance in the sachet, and the other sheet is deformed against a surface having portions forming, upon deformation of the second sheet, local breakages in that sheet for opening that sheet for flow of extracted beverage substance. The cake and sheets advantageously are configured so that there is free space between at least one of the cake surfaces and one sheet for allowing the substance to expand between the sheets, and a cake surface may have a concave shape or may have channel impressions therein and be positioned adjacent the at least one opening for injection of extraction fluid.

대표청구항 ▼

[ We claim:] [1.] In a process for preparation of a beverage wherein an extraction fluid is introduced into a sachet which contains a substance which is suitable for preparation of a beverage for obtaining a beverage, the improvements comprising:positioning a sachet which contains a compacted powder

[ We claim:] [1.] In a process for preparation of a beverage wherein an extraction fluid is introduced into a sachet which contains a substance which is suitable for preparation of a beverage for obtaining a beverage, the improvements comprising:positioning a sachet which contains a compacted powder substance cake comprising roast and ground coffee for preparation of a beverage adjacent a surface of a device for extracting a substance under pressure, wherein the cake comprises two cake surfaces which extend to a peripheral cake edge and wherein the sachet comprises two sheets impermeable to oxygen and water vapor, so that one of the two sheets is adjacent the extraction device surface, and wherein the two sheets each comprise three material layers so that, with reference to the cake, the sealed sheets comprise inner, intermediate and outer sachet material layers wherein the inner sachet sheet material layer is a plastic material, the intermediate sheet material layer is aluminum and the outer sheet material layer is a plastic material, and wherein the extraction device surface comprises portions so that upon extraction of the substance under pressure, first, the sheet adjacent the extraction device surface deforms and so that, subsequently, local breakages form in the deformed sheet for providing sheet openings for flow of beverage through the sheet openings and wherein upon the positioning, the cake is positioned between the two sheets and the two sheets extend to peripheral sheet edges which extend beyond the peripheral cake edge and are sealed together to form a sealed edge which circumscribes the sheets so that the cake is enclosed between the sheets and so that the two sheets circumscribed by the sealed edge are substantially symmetrical so that the sealed edge defines a plane through the sachet and wherein the cake and sachet are configured so that the cake has a volume so that there is free space between the cake and at least one sheet and so that the free space is in an amount of less than 20% of a sachet internal volume between the sheet portions circumscribed by the sealed edge and then, after positioning, perforating one sachet sheet with at least one perforating member to provide at least one opening for introducing an extraction fluid into the sachet to the cake substance for extracting the substance under pressure for preparing the beverage;injecting an extraction fluid under pressure into the perforated sachet and to the cake substance via the at least one opening so that the cake substance is extracted under pressure for preparing the beverage and so that first, the one sheet positioned against the extraction device surface deforms and so that subsequently, localized breakages form in the deformed sheet to provide sheet openings for beverage flow from the sachet; andobtaining the beverage flow from the sachet.