Portion capsule and use of a portion capsule

Abstract

A portion capsule for preparing a beverage is proposed, having a substantially frustoconical or cylindrical base element, which has a cavity for accommodating a beverage raw material, and a membrane which closes the cavity, with a wall region of the base element having a plurality of channels.

1 . Portion capsule for preparing a beverage, having a substantially frustoconical or cylindrical base element, which has a cavity for accommodating a beverage raw material, and a membrane which closes the cavity, characterized in that a wall region of the base element has a plurality of channels. 
     
     
         2 . Portion capsule according to  claim 1 , characterized in that the channels each extend substantially in a plane which is parallel to the membrane, with the channels preferably each being designed to substantially encircle the base element. 
     
     
         3 . Portion capsule according to  claim 1 , characterized in that the channels each comprise a groove and/or convexity which are/is preferably formed on an inner face of the base element, the inner face facing the cavity, and/or on an outer face of the base element, the outer face being averted from the cavity. 
     
     
         4 . Portion capsule according to  claim 1 , characterized in that the channels are designed in such a way that the wall region is reinforced by means of the channels and/or that eddying of an extraction liquid which flows through the cavity is generated by means of the channels. 
     
     
         5 . Portion capsule according to  claim 1 , characterized in that the membrane is roughened at least on an outer face which is averted from the cavity. 
     
     
         6 . Portion capsule according to  claim 5 , characterized in that the membrane is provided with a roughened protective film or foil on the outer face. 
     
     
         7 . Portion capsule according to  claim 1 , characterized in that a wall region of the base element has a shoulder. 
     
     
         8 . Portion capsule according to  claim 7 , characterized in that the portion capsule has a flange to which the membrane is attached, with the shoulder being designed to adjoin the flange. 
     
     
         9 . Portion capsule according to  claim 7 , characterized in that the base element has an enlarged diameter in the region of the shoulder in a plane parallel to the membrane. 
     
     
         10 . Portion capsule according to  claim 7 , characterized in that the base element tapers in the direction of the membrane in the region of the shoulder. 
     
     
         11 . Portion capsule according to  claim 1 , characterized in that the portion capsule has a flange to which the membrane is attached, with a ratio of the diameter of that wall region of the base element which adjoins the flange to the diameter of the flange being between 0.79 and 0.95. 
     
     
         12 . Portion capsule according to  claim 11 , characterized in that the ratio of the diameter of that wall region of the base element which adjoins the flange to the diameter of the flange being between 0.85 and 0.89, and in particular being substantially 0.87. 
     
     
         13 . Portion capsule according to  claim 11 , characterized in that the diameter of that wall region of the base element which adjoins the flange is substantially 39 millimeters and/or the diameter of the flange is substantially 45 millimeters. 
     
     
         14 . Portion capsule according to  claim 1 , characterized in that the base element has a bottom region which extends substantially parallel to the membrane and a wall region which extends substantially between the membrane and the bottom region, with the base element having a greater or lesser material thickness in the bottom region than in the wall region. 
     
     
         15 . Portion capsule according to  claim 1 , characterized in that a filter element is arranged within the cavity, the filter element dividing the cavity into a first region for accommodating the beverage raw material and into a second region for accommodating a beverage extract, with the filter element having a fusible element on a side which faces a bottom region of the base element. 
     
     
         16 . Portion capsule according to  claim 1 , characterized in that a filter element is arranged within the cavity, the filter element dividing the cavity into a first region for accommodating the beverage raw material and into a second region for accommodating a beverage extract, with the filter element having at least one holding area for picking up the filter element. 
     
     
         17 . Portion capsule according to  claim 16 , characterized in that the filter element has a plurality of filter openings, with the filter openings being arranged outside the holding area. 
     
     
         18 . Portion capsule according to  claim 17 , characterized in that the holding area is formed in a central region of the filter element. 
     
     
         19 . Portion capsule according to  claim 1 , characterized in that a filter element is arranged within the cavity, the filter element dividing the cavity into a first region for accommodating the beverage raw material and into a second region for accommodating a beverage extract, with the portion capsule having a ratio of a first distance between the membrane and the filter element to a second distance between a bottom region of the base element and the filter element of between 3.5 and 4.5. 
     
     
         20 . Portion capsule according to  claim 19 , characterized in that the ratio of the first distance to the second distance is between 3.8 and 4.2, and preferably substantially 4. 
     
     
         21 . Portion capsule according to  claim 20 , characterized in that the first distance is substantially 20 millimeters and the second distance is substantially 5 millimeters. 
     
     
         22 . Portion capsule according to  claim 1 , characterized in that a filter element is arranged within the cavity, the filter element dividing the cavity into a first region for accommodating the beverage raw material and into a second region for accommodating a beverage extract, with the filter element having a circumferential sealing lip for sealing off the first region from the second region, the sealing lip moulding itself against the wall region of the base element in a form-fitting manner and extending perpendicular to the membrane at least over the entire height of the filter element. 
     
     
         23 . Portion capsule according to  claim 22 , characterized in that the sealing lip is circular in a plane parallel to the membrane, with the diameter of the sealing lip tapering in the direction of the bottom region of the base element. 
     
     
         24 . Portion capsule according to  claim 23 , characterized in that the sealing lip has a pressure area which faces the first region and is designed in such a way that an excess pressure in the first region leads to an increase in a sealing pressure between the sealing lip and the wall region. 
     
     
         25 . Use of a portion capsule according to  claim 1  for preparing a hot beverage.