Patent ID: 6840158

Claim:
A device for preparation of a coffee drink having a visually appealing crema layer with pressurized hot water comprising: a container for receiving flavor-containing materials and allowing the flavor-containing materials to interact with pressurized hot water to produce a coffee drink under pressure; an orifice for converting the coffee drink under pressure from said container into a coffee drink jet at sufficiently high speed; a cyclone channel positioned below said orifice and adapted to interact with the coffee drink jet from said orifice to generate a cyclone zone during the process of preparing the coffee drink, said cyclone zone drawing air in from atmosphere to emulsify with the coffee drink within said cyclone zone and driving the resulting emulsion out of said cyclone zone as a result of the momentum of the coffee drink jet, said emulsion separating into a coffee drink layer and a visually appealing crema layer on top of the coffee drink upon being received in a receptacle; and wherein said cyclone channel comprises at least one protrusion member on the interior surface of said cyclone channel for facilitating the formation of said cyclone zone in said cyclone channel.