US 9,807,975 B2
Device for producing milk foam
Bernd Buchholz, Rahden (DE); and Thomas Diester, Bueckeburg (DE)
Assigned to MELITTA PROFESSIONAL COFFEE SOLUTIONS GMBH & CO. KG, Minden (DE)
Filed by Melitta SystemService GmbH & Co. KG, Minden (DE)
Filed on Apr. 29, 2014, as Appl. No. 14/264,977.
Claims priority of application No. 10 2013 104 338 (DE), filed on Apr. 29, 2013.
Prior Publication US 2014/0322415 A1, Oct. 30, 2014
Int. Cl. A01J 11/00 (2006.01); A01J 11/04 (2006.01); A23C 7/00 (2006.01); A47J 31/44 (2006.01)
CPC A01J 11/04 (2013.01) [A23C 7/00 (2013.01); A47J 31/4485 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A device for processing milk foam for use in an automatic hot and/or cold beverage machine, comprising:
a first mixing chamber having an input for admitting air from a supply of air, an input for admitting milk from a milk supply and an output, the first mixing chamber mixing the air and the milk to produce the milk foam at the output;
a milk pump in fluid communication with the first mixing chamber to pump the milk foam; and
a secondary processing device in fluid communication with the milk foam pump to change a consistency of the milk foam, the secondary processing device including a flow through direction and a homogenizer to break up and distribute air bubbles in the milk foam, the homogenizer comprising:
an inlet region to receive the milk foam and having a shape of a truncated cone that is expanded in the flow-through direction, the truncated cone having a top surface with a circumference and that makes an obtuse angle with a conically shaped side surface of the truncated cone, wherein the milk foam entering the inlet region impacts the top surface and is distributed uniformly around the circumference to the conically shaped side surface;
a reducing region adjoining the inlet region and including a plurality of impact bodies arranged to define a channel labyrinth through which the milk foam is flowable in divided partial flows in the flow-through direction of the secondary processing device, the reducing region being tapered in the flow-through direction; and
an outlet region adjoining the reducing region in a downstream direction and having a shape of a truncated cone that is further tapered in the flow-through direction relative to the reducing region.