초록 ▼

A cover for a valved dispensing closure prevents the valve from opening while the cover is disposed on closure. The cover's central projection prevents flaps formed in the valve from opening, and the cover's outer projection prevents the flexible valve head from moving or inverting. The cover may al

A cover for a valved dispensing closure prevents the valve from opening while the cover is disposed on closure. The cover's central projection prevents flaps formed in the valve from opening, and the cover's outer projection prevents the flexible valve head from moving or inverting. The cover may also have projections that project inwardly from its skirt. The cover projections interact with mating projections formed on an exterior of the closure, and a lower end of the skirt may be disposed into an annular groove in the closure, to enhance a seal between the closure and the cover.

대표청구항 ▼

1. A closure for dispensing a product from a container, the closure comprising:a base fanning an orifice through which the product is capable of passing, the base including a coupling member extending inwardly toward the orifice for coupling the base to the container; a flexible dispensing valve sec

1. A closure for dispensing a product from a container, the closure comprising:a base fanning an orifice through which the product is capable of passing, the base including a coupling member extending inwardly toward the orifice for coupling the base to the container; a flexible dispensing valve secured within the base, the dispensing valve including a valve bead having flaps formed therein that open from an at-rest, sealed position, the dispensing valve flaps being formed by slits formed in the valve head, the slits forming an intersection point thereof; and a cover removably coupled to the base, the cover including a central post extending downwardly from a top portion of the cover and an outer projection disposed concentrically about said central post, a distal portion of the post contacting the flaps at or proximate the intersection point to inhibit the flaps from opening. 2. The closure of claim 1 wherein the central post contacts the flaps at the intersection point.3. The closure of claim 1 wherein the outer projection is a ring extending downwardly from the top portion of the cover, the ring restricting movement of the valve head to inhibit the valve bead from inverting.4. The closure of claim 1 wherein the cover includes outwardly projecting fins for inhibiting interlock with tamper evident means on the base of other similar closures.5. The closure of claim 1 wherein the dispensing valve includes a periphery that is fixed relative to the base and a connector sleeve coupled between the valve periphery and the valve head.6. The closure of claim 5 wherein the outer projection inhibits the dispensing valve from opening.7. The closure of claim 6 wherein the outer projection contacts the valve head to inhibit the valve head from inverting in response to container internal pressure.8. The closure of claim 6 wherein the outer projection contacts the connector sleeve to inhibit the valve head from inverting in response to container internal pressure.9. The closure of claim 1 wherein the cover includes a skirt downwardly depending from the top portion, the skirt removably contacting the base to removably secure the cover to the base.10. The closure of claim 1 wherein a distal tip of the cover is disposed in an annular recess in the base.11. The closure of claim 9 wherein the cover includes at least one circumferential cover bead extending inwardly from the skirt and the base includes at least one circumferential base bead extending outward from an exterior portion thereof, the cover bead and the base bead cooperating upon coupling of the cover and the base.12. A valved dispensing closure for a neck of a deformable container for containing product to be dispensed by a dispensing operation through a discharge orifice in the closure in response to manually applied lateral squeezing forces on the container and for automatically ceasing the dispensing operation when manually applied forces are removed, the closure comprising:a base having an interior, a coupling member capable of mating with the neck of the container, and a substantially horizontal radially inwardly extending top having a lower inner face and an opening, the base including a lower side wall and an upper side wall of reduced diameter and a substantially horizontal ledge interposed therebetween, the upper side wall having a lower end and the ledge having a circumferentially extending exterior recess at the lower end of the upper side wall, the base having an internal radially extending lip on the interior of the base adjacent to the top; a self sealing dispensing valve extending across the opening of the top and having a periphery and a central valve bead having the discharge orifice which opens at a predetermined threshold pressure which is greater than a maximum hydraulic head pressure of the product in said container when the container is suspended in an inverted position with the discharge orifice facing downwardly, said valve head having a predetermined inwardly concave configuration while the valve is in an at rest, unstressed condition when the valved closure is mounted on the neck of the container and the container is in an undeformed condition, said valve head having at least one slit defining the discharge orifice extending through its thickness from its innermost surface to its outermost surface, said valve exhibiting an ability to undergo movement from a closed, inwardly concave, sealed and leak-resistant position to an open, outwardly convex, unsealed position when said manually applied lateral squeezing forces increase the pressure inside the container beyond the threshold opening pressure of said valve to open the slit and consequently the discharge orifice, whereby product is adapted to be discharged from the container through the discharge orifice as long as the manually applied squeezing forces on the container maintain an internal pressure exceeding the threshold opening pressure of the valve, said valve also exhibiting an ability to automatically cutoff the product discharge by returning to its closed inwardly concave, sealed and lea resistant position whenever the manually applied forces are removed from the container, the valve having a circumferentially extending flange located beneath the lower inner face of the base top; an internal retaining ring disposed within the interior of the base and having an upper face, the retaining ring having a circumferential recess formed proximate the upper face, the flange secured between the retaining ring recess and an opposing recess formed on the lip to clamp the valve flange between the retaining ring and the lower inner face of the top; and a removable cover including a downwardly depending cylindrical skirt being removably disposed over the upper side wall, a cover top extends over the base top and is coupled to the skirt, and a central post extending downwardly from a center of the cover top and contacting the valve head to inhibit opening thereof. 13. The valved dispensing closure of claim 12 wherein the base ledge is provided with an internal circumferentially extending settling edge formed on an interior surface of the base for sealing the base to the neck of the container.14. The valved dispensing closure of claim 12 wherein a lower end of the cylindrical skirt extends into the circumferentially extending recess in the ledge to define inter-engaging surfaces providing a watertight seal between the cover and closure base.15. The valved dispensing closure of claim 12 wherein the closure top further includes an outer projection extending downwardly from the cover top and spaced apart from the post.16. The valved dispensing disclosure of claim 15 wherein the outer projection is a cylinder.17. The valved dispensing closure of claim 15 wherein the post contacts a center portion of the valve head to resist opening of the valve, and the outer projection substantially contacts the valve to resist inverting of the valve.18. The valved dispensing closure of claim 17 wherein the outer projection contacts the valve head.19. The valved dispensing closure of claim 17 wherein the outer projection substantially contacts an inner portion of a connector sleeve that is disposed between the valve head and the periphery of the valve.20. The valved dispensing closure of claim 12 wherein the cylindrical skirt of the cover includes an inner face having a circumferentially extending, radially inwardly projecting rib having an upper edge, the upper side wall of the base including an outer face having a circumferentially extending radially outwardly projecting rib having a lower edge, the lower edge of the outwardly projecting rib of the base upper side wall and the upper edge of the outwardly projecting rib of the cover skirt inter-engaging when the cover is slid over the base upper side wall with the lower end of the cylindrical skirt of the cover extending into the circumferentially extending recess in the base ledge to enhance the watertight seal between the cover and the closure base.21. The valved dispensing closure of claim 20 wherein the rib of the skirt contacts the outer face of the upper sidewall of the base and the rib of the base upper sidewall contacts the inner face of the skirt.22. The valved dispensing closure of claim 12 wherein the valved head includes a pair of intersecting slits.23. The valved dispensing closure of claim 12 wherein the self-sealing dispensing valve includes an integral connector sleeve interconnecting the valve head and flange of the valve.24. The valved dispensing closure of claim 12 wherein the base includes a lower side wall and a tamper evident band is at the bottom of the lower side wall to visually indicate when the closure is removed from the neck of the container after having been fully applied to the neck following filling of the container with product to be dispensed.25. The valved dispensing closure of claim 24 wherein the cover skirt has external radially outwardly projecting fins for inhibiting interlock with the tamper evident means on the base of other similar closures.26. The valved dispensing closure of claim 25 wherein the sealing edge forms a slope such that an inner rim of the sealing edge as lower than an outer portion of the sealing edge.27. The valved dispensing closure of claim 12 wherein the base includes a lower side wall having internal threads for mating with external threads on the neck of the container.