Method of and apparatus for making drip-type coffee

Claim 1

A drip coffeemaker for making varying amounts of a coffee beverage from roasted and ground coffee primarily for immediate consumption, said drip coffeemaker comprising a drip brew basket-filter means for receiving a bed of roasted and ground coffee, and means for providing a predetermined quantity of heated water for drip extraction from said roast and ground coffee, which heated water passes through said bed of roast and ground coffee through an aperture in drip brew basket-filter means into a container positioned below said drip brew basket-filter means to provide a filtered coffee extract, the improvement comprising: a. water receiving means for receiving a predetermined quantity of water; b. means for dividing said predetermined quantity of water into an extraction portion and a bypass-dilution portion, c. warm water means for forwarding said extraction portion of said water at a predetermined temperature over said roasted and ground coffee at a sufficiently slow rate to cause a relatively strong filtered coffee extract to issue into said container; and, d. dilution water means for causing said bypass-dilution portion of said water to bypass said bed of roast and ground coffee and for causing said bypass-dilution portion to be forwarded into said container at a pre-selected temperature substantially different from said pre-determined temperature, said coffeemaker further comprising means for causing said bypass-dilution portion to be so related to said extraction portion of said water and said pre-selected temperature to be so related to said predetermined temperature to cause said relatively strong coffee extract to be diluted to a predetermined beverage concentration at a preferred serving temperature.