Method for the preparation of coffee

Details Method for the preparation of coffee Method for the preparation of coffee

A - Human Necessities

23

F

99/81

A23F 5/24 (2006.01) A23F 5/08 (2006.01) A47J 31/40 (2006.01) A47J 31/42 (2006.01)

Patent

CA 1299429

ABSTRACT OF THE DISCLOSURE In a coffee brewing apparatus, a milling assembly produces cof- fee powder which is filled into a brewing chamber. Then the brewing chamber is closed by a displaceable piston in order to exert a preselected pressure on the coffee powder in the brew- ing chamber, and hot water is forced through the compressed coffee powder. If it is recognized after several subsequent preparation cycles that too much or too less coffee powder has been filled into the brewing chamber, the operation period of the milling assembly is shortened or extended automatically under the influence of a programmed control unit. Simultaneous- ly or additionally, a flow rate detector measures the amount of water flowing through the compressed coffee powder and the con- trol unit measures the time required by the water to pass through the coffee powder in the brewing chamber. If a devia- tion of the measured time from a reference value is detected, the milling rate is adjusted to produce finer or coarser coffee powder in one of the subsequent preparation cycles. Minor de- viations within normal tolerances are ignored.

532901

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