Patent ID: 8607694

Claim:
A boiler for a machine for making hot beverages, the boiler comprising: at least two diffusers ( 32 , 32 ), each of which comprises a first wall ( 33 ) destined to be placed in contact with a liquid to be heated and a second wall ( 34 ) opposite said first wall ( 33 ), wherein said first and second walls of each of said at least two diffusers are continuous so that, with respect to each of said at least two diffusers, the liquid only contacts said first wall; a support ( 20 ) made of plastic on which said second wall ( 34 ) of each of said at least two diffusers bears and that is protected from the liquid; heating means ( 30 ) for heating the liquid and comprising at least two serigraphed or photo engraved resistances ( 31 , 31 ) that are each arranged on a respective said second wall ( 34 ); and a body which, with said first wall ( 33 ) of each of said two diffusers, defines a heating volume ( 11 ) inside which the liquid is to be heated, said body comprising a material with a thermal conductivity that is less than 1 W/m/K, wherein the boiler is arranged so that the heating volume ( 11 ) is positioned on both sides of said heating means ( 30 ).