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.

Abstract: Spray dispensing of a metered quantity of a preferably semi-liquid product from a filled container having a fixed wall provided with at least one and preferably a plurality of generally open and unobstructed discharge passageways. A moveable wall spaced apart from the fixed wall is impacted with a moving mass to induce a pressure pulse in the product sufficient to surge a metered quantity of product less than the entire content of the container through the generally open and unobstructed discharge passageways with sufficient velocity as to break away from the passageways and the remaining product within the container for ballistic travel generally normal the fixed wall outwardly of the container. A plurality of uniform discharge passageways and a proper match of product formulation and energy input produces a generally uniformly moving cluster of generally uniformly defined and moving particles.