The present invention relates to a capsule cage ( 1 ) which can be fitted in a coffee machine, having a water intake channel ( 4 ) and a housing ( 5 ) for the capsule to be extracted, and, directly at the outlet of the water intake channel and in the housing, a system ( 6 ) which pierces the capsule, is independent of the water intake channel and is formed by at least one blade. The blade has two side edges ( 22, 23 ) and a cutting edge, one of the two side edges of the blade having a direction substantially parallel to the direction of piercing A of the capsule to be extracted.
1. A beverage-machine capsule-cage, comprising:
a housing configured for housing a capsule;
a piercing member comprising at least one blade that is configured for piercing an elongated slit into the capsule in the housing with a length to width ratio of at least about 2; and
a fluid conduit defining an intake channel in fluid communication with the housing and configured for feeding an extraction fluid into the slits in the capsule.
2. The capsule cage of claim 1 , wherein the elongated slit has a length to width ratio of up to about 8.
3. The capsule cage of claim 2 , wherein the slit is substantially rectangular.
4. The capsule cage of claim 1 , wherein the blade and housing are configured such that the blade pierces the capsule upon movement relative thereto in a piercing direction, and the blade has an elongated cross-section measured perpendicular to the piercing direction.
5. The capsule cage of claim 1 , wherein the blade comprises a plurality of blades.
6. The capsule cage of claim 5 , wherein the blades are disposed equidistantly from each other around a blade axis.
7. The capsule cage of claim 6 , wherein the piercing member is rotatable around the blade axis.
8. The capsule cage of claim 1 , wherein the piercing member comprises a base mounting the blade to the housing, the base including a fluid opening in fluid communication with the intake channel for feeding the fluid into the housing and pierced capsule.
9. The capsule cage of claim 8 , wherein the blade comprises a plurality of blades disposed around the fluid opening.
10. The capsule cage of claim 1 , wherein the fluid channel has a fluid opening in the housing separate from the blade.
11. The capsule cage of claim 10 , wherein the fluid channel is disposed independent from the blade.
12. The capsule cage of claim 1 , further comprising a connection member configured for connecting the housing to a beverage dispensing machine.
13. The capsule cage of claim 12 , wherein the connection member comprises a spherical member to connect with the beverage dispensing machine so that the cage is spherically movable with respect thereto to improve leaktightness.
14. The capsule cage of claim 1 , wherein the housing comprises a dynamic seal to seal the housing when closed around the capsule.
15. The capsule cage of claim 1 , wherein the blade and housing are configured such that the blade pierces the capsule upon movement relative thereto in a piercing direction, the blade having:
a cutting edge disposed forwardly in the piercing direction and configured for cutting the slit; and
and a first major side adjacent the cutting edge and oriented substantially parallel to the piercing direction.
16. The capsule cage of claim 15 , wherein the blade comprises a second major side adjacent the cutting edge and oriented substantially parallel to the piercing direction.
17. The capsule cage of claim 16 , wherein the blade has a side edge extending substantially parallel to the piercing direction.
18. The capsule cage of claim 16 , wherein the blade defines an aperture extending between the first and second major sides.
19. A beverage-machine capsule-cage, comprising:
a housing configured for housing a capsule;
a piercing member comprising at least one blade that is configured for piercing an elongated slit having substantially parallel sides into the capsule in the housing, wherein the blade and housing are configured such that the blade pierces the capsule upon movement relative thereto in a piercing direction, and the blade has an elongated cross-section measured perpendicular to the piercing direction; and
a fluid conduit defining an intake channel in fluid communication with the housing and configured for feeding an extraction fluid into the slit in the capsule.
20. The capsule cage of claim 15 , wherein the blade cross-section is substantially rectangular.
21. The capsule cage of claim 19 , wherein the blade cross-section has a length to width ratio of about between 2 and 8.
22. The capsule cage of claim 19 , wherein the blade has a cutting edge facing generally in the piercing direction and having a surface disposed at an angle of about between 30° and 60° from the piercing direction for cutting the slit.
23. The capsule cage of claim 19 , wherein the blade comprises:
a cutting edge disposed forwardly in the piercing direction and configured for cutting the slit; and
a first major side adjacent the cutting edge and oriented substantially parallel to the piercing direction.