Method of and apparatus for dispensing batches of soap lather

A method of discharging batches of lather from a soap dispenser, comprising the steps of confining a first supply of liquid soap in a first vessel of the dispenser;

• confining a second supply of liquid soap in a second vessel of the dispenser beneath a first body of air;
• confining a third supply of liquid soap in a third vessel of the dispenser beneath a second body of air;
• repeatedly raising the pressure of said second body of air to thus expel successive quantities of liquid soap from the third vessel into a mixing chamber of the dispenser and simultaneously admitting into the mixing chamber compressed air from said second body of air to form successive batches of lather and expelling successive batches of lather from the mixing chamber;
• and replenishing the second and third supplies of liquid soap from the first supply following the pressure raising step, including admitting liquid soap from the first supply into the second supply to fill the second vessel with liquid soap to a predetermined level through a conduit having an intake end connected with the first vessel and a discharge end.

A method of discharging batches of lather from a soap dispenser, comprising the steps of confining a first supply of liquid soap in a first vessel of the dispenser;

• confining a second supply of liquid soap in a second vessel of the dispenser beneath a first body of air;
• confining a third supply of liquid soap in a third vessel of the dispenser beneath a second body of air;
• repeatedly raising the pressure of said second body of air to thus expel successive quantities of liquid soap from the third vessel into a mixing chamber and simultaneously admitting into the mixing chamber compressed air from said second body of air to form successive batches of lather and expelling successive batches of lather from the mixing chamber;
• metering the liquid soap which is being expelled from the third vessel into the mixing chamber;
• and replenishing the second and third supplies of liquid soap from the first supply following the pressure raising step.

A dispenser for batches of lather, comprising first, second and third vessels for first, second and third supplies of liquid soap;

• said second vessel including a lower portion for said second supply, an upper portion for a first body of air and a first outlet for evacuation of liquid soap from said lower portion to said third vessel, said third vessel including a first portion for said third supply of liquid soap;
• a lather generator fluidly connected to said first portion of the third vessel and defining a mixing chamber having a third outlet;
• means for repeatedly compressing said second body of air to thus expel successive quantities of liquid soap from said third supply into said mixing chamber and to admit compressed air into said mixing chamber to form successive batches of lather which are expelled through said third outlet;
• and means for replenishing said second and third supplies from said first supply upon expulsion of a quantity of liquid soap from said second and third vessels, said replenishing means comprising a conduit having an intake end connected with said first vessel and a discharge end for admission of liquid soap at a predetermined level within said second vessel, said second vessel being disposed below said first vessel and said conduit extending downwardly through the upper portion of said second vessel, said discharge end establishing a boundary between the second supply and the first body of air in said second vessel.