A capsule for the preparation of a coffee extract from coffee contained therein and hot water injected under pressure in the capsule by a water injection device. The capsule has a frusto-conical body with a rim, sidewall, and an inlet wall and a lower delivery wall sealed to the rim and contains a p
A capsule for the preparation of a coffee extract from coffee contained therein and hot water injected under pressure in the capsule by a water injection device. The capsule has a frusto-conical body with a rim, sidewall, and an inlet wall and a lower delivery wall sealed to the rim and contains a predosed amount of coffee. The inlet wall may have a flat or convex portion and a structure in relief or in recess arranged for facilitating penetration of blades belonging to the injection device and extending on a substantially circular path of predetermined radius R1 equal to the radius R2 of the circular path along which the blades of the injection device extend.
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1. A capsule for the preparation of a coffee extract from coffee contained in the capsule and hot water injected under pressure in the capsule by a water injection device having blades extending along a circular path, the capsule comprising: a frusto-conical body comprising a rim, a sidewall and an
1. A capsule for the preparation of a coffee extract from coffee contained in the capsule and hot water injected under pressure in the capsule by a water injection device having blades extending along a circular path, the capsule comprising: a frusto-conical body comprising a rim, a sidewall and an inlet wall, the rim forms a flange;a lower delivery wall sealed to the rim of the body;a predosed amount of coffee in the capsule;wherein the inlet wall has a structure arranged for facilitating penetration by blades belonging to the water injection device, the structure comprises a portion of the inlet wall having a reduced thickness (t) compared to the thickness of the sidewall, the portion of the inlet wall having the reduced thickness is positioned along a radius (R1) equal to the radius (R2) of the circular path along which the blades of the water injection device extend, the structure is selected from the group consisting of (i) a continuous recessed annular portion along the radius R1, (ii) a plurality of discontinuous arcuate recessed portions along a circular path on the radius R1, and (iii) an annular recessed portion positioned along the radius R1 and comprising a plurality of injection holes and a gastight membrane sealed onto the inner wall to sealingly cover the injection holes;wherein the body is a self-standing, integrally moulded piece extending by the rim and is made of polymer material;wherein the inlet wall that has the reduced thickness comprises reinforcement members extending locally on the inlet wall to ensure improved rigidity during perforation by the blades;wherein the predefined circular line of radius R1 corresponding to a circular line of radius R2 for extension of the blades of the water injection device is free of the reinforcement members; andwherein the reinforcement members are integral with the body and extend from the inlet wall to the sidewall of the body. 2. The capsule according to claim 1, wherein the portion of the inlet wall having the reduced thickness extends from a central axis of the capsule to or towards a junction of the inlet wall with the sidewall. 3. The capsule according to claim 1, wherein the reinforcement members extend radially as a plurality of ridges. 4. The capsule according to claim 2, wherein the reinforcement members extend concentrically as a plurality of ridges around the central axis of the inlet wall. 5. The capsule according to claim 4, wherein the concentrically extending ridges extend outside of the circular line of radius R1. 6. The capsule according to claim 1, wherein the frusto-conical body is made of polymer material comprising polypropylene or polyethylene. 7. The capsule according to claim 1, wherein the frusto-conical body is made of a biodegradable material. 8. The capsule according to claim 1, wherein the rim comprises sealing means. 9. The capsule according to claim 1, in combination with a beverage production device comprising a water injection device that has a series of blades for injecting water into the capsule through the inlet wall; wherein the blades are placed along a circular path of radius R2 substantially equal to the radius R1. 10. A capsule containing a comestible ingredient for preparing a liquid food when contacting water injected under pressure into the capsule by a water injection device having blades extending along a circular path, the capsule comprising: a self-standing, integrally moulded frusto-conical body made of polymer material and comprising a rim, a sidewall and an inlet wall, the rim forms a flange;wherein the inlet wall has a structure arranged for facilitating penetration by blades belonging to the water injection device, the structure comprises a portion of the inlet wall having a reduced thickness (t) compared to the thickness of the sidewall, the portion of the inlet wall having the reduced thickness is positioned along a radius (R1) equal to the radius (R2) of the circular path along which the blades of the water injection device extend, the structure is selected from the group consisting of (i) a continuous recessed annular portion along the radius R1, (ii) a plurality of discontinuous arcuate recessed portions along a circular path on the radius R1, and (iii) an annular recessed portion positioned along the radius R1 and comprising a plurality of injection holes and a gastight membrane sealed onto the inner wall to sealingly cover the injection holes;a lower delivery wall sealed to the rim of the body;a predosed amount of comestible material in the capsule; andreinforcement members extending both on the inlet wall and sidewall of the body which are integral with the body to ensure improved rigidity of the inlet wall during perforation by the blades, wherein a predefined circular line of radius R1 corresponding to a circular line of radius R2 for extension of the blades of the water injection device is free of the reinforcement members. 11. The capsule according to claim 10, wherein the portion of the inlet wall having the reduced thickness extends from a central axis of the capsule to or towards a junction of the inlet wall with the sidewall. 12. The capsule according to claim 10, wherein the reinforcement members extend radially as a plurality of ridges. 13. The capsule according to claim 11, wherein the reinforcement members extend concentrically as a plurality of ridges around the central axis of the inlet wall. 14. The capsule according to claim 13, wherein the concentrically extending ridges extend outside of the circular line of radius R1. 15. The capsule according to claim 10, wherein the frusto-conical body is made of polymer material comprising polypropylene or polyethylene. 16. The capsule according to claim 10, wherein the frusto-conical body is made of a biodegradable material. 17. The capsule according to claim 10, wherein the rim comprises sealing means. 18. The capsule according to claim 10, in combination with a beverage production device comprising a water injection device that has a series of blades for injecting water into the capsule through the inlet wall; wherein the blades are placed along a circular path of radius R2 substantially equal to the radius R1. 19. The capsule according to claim 10, wherein the structure comprises a continuous recessed annular portion along the radius R1. 20. The capsule according to claim 1, wherein the structure comprises a continuous recessed annular portion along the radius R1.
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