Liquid frothing system for beverage brewing machine

Abstract

A hot beverage preparation system and related method of use. The system includes a brewing machine that can deliver a finished brewed beverage such as coffee or tea accompanied by frothed supplementary liquid such as milk or milk substitute. The supplementary liquid is heated and frothed by a superheated jet or stream of water in liquid state dispensed from a nozzle the machine. This permits a less volume of water to be used to heat liquid which minimizes dilatation of the brewed beverage. The superheated water is injected directly into the supplementary liquid without contact with the nozzle which prevents cross-contamination. The system may use tandem water boiler to progressively heat the water to superheated conditions. A flow bypass may be provided which extracts and mixes heated water output from each of two boilers at different temperatures during the brewing cycle which follows the supplementary liquid heating/frothing step.

Dependencies are inferred from the claim text.