Methods, capsules and apparatus for the production of foamed drinks
View Patent ↗The invention provides a method for the preparation of a foamed drink comprising the steps of: providing a capsule containing a foamable ingredient; providing a receptacle positioned to collect fluid escaping from the capsule; injecting liquid into the capsule to mix with the foamable ingredient; allowing the foamable ingredient mixed with the liquid to escape from the capsule into the receptacle; followed by injecting further liquid into the receptacle in a jet having a diameter of from about 0.5 to about 2 mm to produce foamed liquid in the receptacle. The invention also provides capsules, apparatus and systems specifically adapted for use in the method. Preferably, the food ingredient is a milk powder, and the method produces a hot foamed beverage such as a cappuccino coffee.
1. A liquid injection nozzle for a beverage making apparatus comprising:
a liquid injection nozzle having an inlet and an outlet and an internal bore extending between the inlet and the outlet;
the length of the internal bore being in the range of from about 1 cm to about 10 cm, the cross-sectional area of the outlet is from about 0.2 to about 5 mm 2 , and the internal bore has a continuous taper between the inlet and the outlet, the taper between the inlet and the outlet having an angle of greater than 0° and up to 10°;
wherein the configuration of the nozzle provides a jet of water that causes foaming of a mixture in the beverage making apparatus to produce a foamed liquid beverage comprising a liquid layer and a foam layer.
2. The liquid injection nozzle according to claim 1 , wherein the inner surfaces of the internal nozzle bore are substantially smooth.
3. The liquid injection nozzle according to claim 1 , wherein the angle of taper of the internal bore is in the range of from about 0.5° to about 5°.
4. The liquid injection nozzle according to claim 1 , wherein the cross-section of the internal bore is substantially circular.
5. The liquid injection nozzle according to claim 1 , wherein the nozzle is demountable from the beverage making apparatus.