Filter for a filter holder cup of a coffee machine
The filter ( 6, 13 ) for a filter holder cup ( 2 ) of a coffee machine, including a cup body ( 6 ) having a bottom wall ( 7 ) provided with a dispensing hole ( 8 ) for dispensing infused coffee and a side wall ( 9 ) that bounds a compartment ( 10 ) with the bottom wall ( 7 ), inside the compartment ( 10 ) a separating filtering wall ( 13 ) being further positioned between an upper housing chamber ( 14 ) housing coffee powder and a lower dispensing chamber ( 15 ) for dispensing the infused coffee including said dispensing hole ( 8 ), inside said dispensing chamber ( 15 ) a filtering element ( 17 ) is provided to protect said dispensing hole ( 8 ).
1. A filter ( 6 , 13 ) for a filter holder cup ( 2 ) of a coffee machine, comprising:
a cup body ( 6 ) having a bottom wall ( 7 ) provided with a dispensing hole ( 8 ) for dispensing infused coffee; and
a side wall ( 9 ) that bounds a compartment ( 10 ) with said bottom wall ( 7 ), inside said compartment ( 10 ) a separating filtering wall ( 13 ) being further positioned between an upper housing chamber ( 14 ) housing coffee powder and a lower dispensing chamber ( 15 ) comprising said dispensing hole ( 8 ) and configured to dispense the infused coffee,
wherein an inside of said dispensing chamber ( 15 ) includes a filtering element ( 17 ) configured to protect said dispensing hole ( 8 ), where said filtering element ( 17 ) is fixed to said filtering wall ( 13 ).
2. The filter ( 6 , 13 ) for a filter holder cup ( 2 ) of a coffee machine according to claim 1 , wherein said filtering element ( 17 ) divides said lower dispensing chamber ( 15 ) into a sub storage chamber ( 15 a ) of unfiltered infused coffee and a dispensing sub chamber ( 15 b ) of filtered infused coffee comprising said dispensing hole ( 8 ).
3. The filter ( 6 , 13 ) for a filter holder cup ( 2 ) of a coffee machine according to claim 1 , wherein said filtering element ( 17 ) has at least one wall ( 17 a ) provided with a plurality of through holes ( 17 b ).
4. The filter ( 6 , 13 ) for a filter holder cup ( 2 ) of a coffee machine according to claim 3 , wherein said filtering wall ( 13 ) has a plurality of through holes ( 13 a ) and the holes ( 17 b ) of said wall ( 17 a ) of said filtering element ( 17 ) are smaller than said holes ( 13 a ) of said filtering wall ( 13 ).
5. The filter ( 6 , 13 ) for a filter holder cup ( 2 ) of a coffee machine according to claim 3 , wherein said wall ( 17 a ) provided with said plurality of through holes ( 17 b ) of said filtering element ( 17 ) surmounts at a distance from said dispensing hole ( 8 ).
6. The filter ( 6 , 13 ) for a filter holder cup ( 2 ) of a coffee machine according to claim 1 , wherein said filtering wall ( 13 ) has a perimeter gasket ( 13 c ) removably engaging with said cup-shaped body ( 6 ).
7. The filter ( 6 , 13 ) for a filter holder cup ( 2 ) of a coffee machine according to claim 1 , wherein said filtering wall ( 13 ) is fixed permanently to said cup-shaped body ( 6 ).
8. The filter ( 6 , 13 ) for a filter holder cup ( 2 ) of a coffee machine according to claim 4 , wherein said holes ( 17 b ) of the filtering element ( 17 ) are 0.15 mm+/−0.03 mm in diameter, said holes ( 13 a ) of the filtering wall ( 13 ) are 0.3 mm+/−0.03 mm in diameter, and said dispensing hole ( 8 ) is 0.4 mm+/−0.05 mm in diameter.
9. A filter holder cup ( 2 ) for a coffee machine comprising a filter ( 6 , 13 ) according to claim 1 .
10. A coffee machine that operates at an infusion pressure comprised between 8 and 10 bar, dispenses a flow rate of infused coffee comprised between 1.8 and 2.2 grams/second, and comprises a filter holder cup ( 2 ) according to claim 9 .