Dual-chamber container and closure package
View Patent ↗A one-piece integrally molded container includes a finish having a deck and a pair of outlet openings surrounded by associated annular walls. A peripheral ring extends upwardly from the deck, and has a radial lip that helps retain the container in the mold tooling during the forming operation. The finish has a radial bead over which a bead on the inside diameter of a closure skirt snaps to secure the closure to the container. Annular walls on the closure surrounding the closure dispensing openings are received in plug sealing engagement within the annular walls surrounding the outlet openings on the container finish deck.
1. A method of making a one-piece dual-chamber plastic container that comprises the steps of
(a) injection molding a container finish that includes a deck and a pair of spaced outlet openings in said deck,
(b) extruding from said finish a hollow tubular body having a peripheral wall extending from a periphery of said finish, and a wall extending from said deck between said openings and dividing said body into separate chambers
(c) capturing said tubular body between mold segments,
(d) blowing said peripheral wall within said mold segments by application of air to said chambers through said openings, and
(c) removing the container from said mold segments.
2. The method set forth in claim 1 wherein said step (a) comprises molding a pair of annular walls respectively extending from said deck around said outlet openings for receipt of plug seals on a closure secured to said finish.
3. The method set forth in claim 2 wherein said step (a) further comprises molding a radial bead around said finish for snap receipt of a closure on said finish.
4. The method set forth in claim 2 wherein said step (a) is carried out in finish injection mold tooling, and further comprises molding an annular ring extending axially from said deck and a lip extending radially outwardly from said ring for retaining said finish in said finish injection mold tooling during said step (b).
5. The method set forth in claim 4 wherein said step (a) is such that said deck, said annular walls and said ring have identical wall thicknesses for controlling material shrinkage and reducing cycle time due to better cooling of the container as molded.