The system of claim 1 wherein said transfer line sensor means includes a first optical sensor for providing said first switching signal and a second optical sensor for providing said second switching signal, said first optical sensor being in optical alignment with said first media transfer line means and said second optical sensor being in optical alignment with said second media transfer line means.ģ. Means for inducing liquid to flow from said transfer line means into said liquid storage reservoir.Ģ.
Transfer line sensor means for monitoring said first and second media transfer line means for the presence of liquid therein, and for generating a first switching signal when liquid becomes absent from said first media transfer line and a second switching signal when liquid becomes absent from said second media transfer line Ĭontainer switching means for alternately placing said first and second containers in liquid-flow communication with said reservoir by switching said valve means to said first state in response to said first switching signal and by switching said valve means to said second state in response to said second switching signal and Pump means for withdrawing liquid stored within said liquid storage reservoir Switchable valve means for, in a first state, preventing liquid from flowing through said first media transfer line means while allowing liquid to flow through said second media transfer line means and for, in a second state, preventing liquid from flowing through said second media transfer line means while allowing liquid to flow through said first media transfer line means:Ī liquid storage reservoir connected in liquid-flow communication with said valve means for storing liquid received from said first and second media transfer line means by way of said valve means īleeding valve means for selectively introducing gas into said liquid storage reservoir Second media transfer line means, positioned in liquid-flow communication with said second container, for transferring liquid from said second container A system for dispensing liquid from first and second containers, comprising:įirst media transfer line means, positioned in liquid-flow communication with said first container, for transferring liquid from said first container
A vacuum generator is disposed to remove gas from the liquid storage reservoir above the level of liquid therein.ġ. The switchable valve is switched to the first state in response to the first switching signal and to the second state in response to the second switching signal. A transfer line sensor arrangement monitors the first and second media transfer lines for the presence of liquid therein, and generates a first switching signal when liquid becomes absent from the first media transfer line and a second switching signal when liquid becomes absent from the second media transfer line. A liquid storage reservoir connected in liquid-flow communication with the switchable valve stores liquid received from the first and second media transfer lines by way of the switchable valve. In a second state the switchable valve prevents liquid from flowing through the second media transfer line while allowing liquid to flow through the first media transfer line.
When placed in a first state a switchable valve prevents liquid from flowing through the first media transfer line and allows liquid to flow through the second media transfer line. A second media transfer line, positioned in liquid-flow communication with the second container, is disposed to transfer liquid from the second container. The liquid dispensing system includes a first media transfer line, positioned in liquid-flow communication with the first container, for transferring liquid from the first container.
A system for dispensing liquid from first and second containers is disclosed herein.