Dispensing cap with center channel and helical flow profile
A dispensing closure for viscous fluids contains a closure body, a closure lid and a living hinge structure hingeably connecting the closure lid to the closure body. The closure body includes an upper deck, a skirt configured and arranged to mount to a product container, and a flow conduit extending through the upper deck to provide a flow path from an interior of the closure to an exterior of the closure. The flow conduit includes an entrance orifice and an exit orifice, and an inner wall extending between the entrance orifice and the exit orifice. To provide the desired flow effect, the inner wall includes at least one flow inhibitor structure, such as helically threaded flights extending at least partially inwardly from the inner wall into the flow path to define an unobstructed central flow path and a partially obstructed peripheral flow path.
1. A dispensing closure comprising: a closure body; a closure lid; and a living hinge structure hingeably connecting said closure lid to said closure body, said closure body including an upper deck, a skirt depending from the upper deck, said skirt being configured and arranged to mount to a product container, and a flow conduit extending through said upper deck to provide a flow path from an interior of said closure to an exterior of said closure, said flow conduit including an entrance orifice and an exit orifice, said flow conduit having an inner wall extending between said entrance orifice and said exit orifice, said inner wall including at least one flow inhibitor structure, said flow inhibitor structure comprising at least one helically threaded flight extending at least partially inwardly from said inner wall into said flow path to define an unobstructed central flow path and a partially obstructed peripheral flow path.
2. The dispensing closure of claim 1 , wherein said flow inhibitor structure comprises first and second helically threaded flights.
3. The dispensing closure of claim 1 , wherein said flow inhibitor structure comprises a plurality of walls extending inwardly from said inner wall.
4. The dispensing closure of claim 1 , wherein said helically threaded flight is downwardly depending from said upper deck.
5. The dispensing closure of claim 1 , wherein said helically threaded flight is upwardly and downwardly depending from said upper deck.
6. The dispensing closure of claim 1 , wherein said helically threaded flight creates a capillary surface attraction within the peripheral flow path with a dispensed product sufficient to prevent free flow of said dispensed product, without applied pressure on the container.