Bimodal storage and dispensing package for fluent material

Abstract

A storage and dispensing package for fluent material capable of bimodal operation. The package has a first mode of operation capable of storing the fluent material without leakage when the package is subjected to unintentional external forces. The package is also provided with a second mode of operation capable of dispensing the fluent material when the package is subjected to external forces intentionally applied by the user. The second mode of operation is also capable of automatically isolating substantially all of the fluent material remaining in the package from the surrounding atmosphere as soon as the intentionally applied external forces are removed. In a preferred embodiment, the package comprises a container, means for applying pressure to the fluent material in the container, a fluid conduit having an inlet end for receiving the fluent material from the container and a discharge end remote from the inlet end. A first valve which does not open in response to pressure is provided at the inlet end of the conduit. In its 'closed' position, the valve prevents fluid communication between the fluent material in the container and the inlet end of the fluid conduit. In its 'open' position, the valve permits fluid communication between the fluent material in the container and the inlet end of the fluid conduit. The valve further includes means for switching the valve between its 'closed' and 'open' positions. A second normally closed valve is also provided at the discharge end of the fluid conduit. The second valve prevents fluid communicaton between fluent material contained in the fluid conduit and the surrounding atmosphere. The second valve is openable only in response to pressure applied by the fluent material in the fluid conduit, and is automatically closable whenever the pressure on the fluent material in the conduit is relieved.