초록 ▼

The invention is directed to a closed flexible sachet in the form of an individual portion provided for extraction under pressure, containing ground roast coffee, which sachet includes two identical flexible sheets or a single folded flexible sheet of circular, oval or polygonal shape. A space for a

The invention is directed to a closed flexible sachet in the form of an individual portion provided for extraction under pressure, containing ground roast coffee, which sachet includes two identical flexible sheets or a single folded flexible sheet of circular, oval or polygonal shape. A space for a powdered beverage is created between the two sheets or between the two faces of the folded sheet. The two sheets or the two faces of the folded sheet are welded over their periphery so that the sachet is substantially symmetrical with respect to its welding plane. The sachet is opened through the rise in pressure which takes place upon injection of an extraction fluid, in which the two flexible sheets or the two faces of the folded sheet extend over one side of the sachet beyond their welding line to provide, between the sheets or between the two faces of the folded sheet, a channel which allows the arrival of the extraction fluid. The channel is substantially perpendicular to the welding line from which it emerges.

대표청구항 ▼

1. A closed flexible sachet which contains an individual portion of a powdered beverage for extraction under pressure, comprising:at least one flexible sheet welded along a welding line around its periphery to form an interior space for containing the powdered beverage, the sachet being substantiall

1. A closed flexible sachet which contains an individual portion of a powdered beverage for extraction under pressure, comprising:at least one flexible sheet welded along a welding line around its periphery to form an interior space for containing the powdered beverage, the sachet being substantially symmetrical with respect to its welding plane; and a channel for water ingress and having an outside portion formed by an edge of the sheet that extends beyond the welding line opposite from the interior space, the channel being oriented substantially perpendicular to the welding line; wherein the flexible sheet is impermeable to oxygen and to water vapor, and the welding line is sufficiently weak across the channel for breaking upon injection of an extraction fluid at a sufficient pressure in the outside channel portion for opening the channel and permitting ingress of the extraction fluid through the channel into the interior space.